CN108300062A - Coating composition and durable, the low gloss coatings formed by it - Google Patents
Coating composition and durable, the low gloss coatings formed by it Download PDFInfo
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- CN108300062A CN108300062A CN201710954336.5A CN201710954336A CN108300062A CN 108300062 A CN108300062 A CN 108300062A CN 201710954336 A CN201710954336 A CN 201710954336A CN 108300062 A CN108300062 A CN 108300062A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Coating system includes:(a) first coating；(b) second coating being applied directly at least part of first coating.First coating is by including following coating composition preparations：(i) at least one hydroxyl-functional polyester's polymer；(ii) sour function adhesion promoter；The crosslinking agent that (iii) is reacted with (i).In addition, second coating is by including following coating composition preparations：(i) the first hydroxyl-functional polyurethane polymer with two or three (methyl) acrylate groups；(ii) the second hydroxyl-functional polyurethane polymer with four or more (methyl) acrylate groups；(iii) includes the dispersion of colloidal silica particles and (methyl) acrylate functional polymer with two or more (methyl) acrylate groups.
Description
Technical field
The present invention relates to coating composition and thus durable, low-luster the coating that kind composition is formed.
Background technology
Low gloss coatings are used for various applications, including for example, automobile, aerospace and industrial market.These coatings have
The physics rough surface for having reflection and scatter visible light, to provide dumb light appearance.Therefore, in order to keep low-luster performance, this
The surface that a little coatings must keep it physically coarse.For example, the equal of coating surface can be increased by being applied to the mechanical stress of coating
Even property and smoothness, to increase glossiness.Mechanical stress can frequently contact coating surface when occur, such as with the electricity of coating
When the everyday exposure of sub- equipment or the abrasive material during cleaning process are cleaned.Therefore, in order to keep the low gloss of coating surface
Property, it is expected that exploitation can bear the film-forming composition of reflectivity and glossiness of the mechanical stress without increasing coating.It also needs to carry
For durable, low gloss coatings, there is good adhesion to various base materials such as plastics and metal base.
Invention content
The present invention relates to a kind of coating systems, including：(a) first coating；(b) it is applied directly to first coating at least
Second coating in a part.First coating is by including prepared by coating composition below：(i) at least one hydroxyl-functional polyester
Polymer；(ii) sour function adhesion promoter；The crosslinking agent that (iii) is reacted with (i).In addition, second coating is by including following
Coating composition prepare：(i) the first hydroxyl-functional polyurethane comprising two or three (methyl) acrylate groups polymerize
Object；(ii) include the second hydroxyl-functional polyurethane polymer of four or more (methyl) acrylate groups；(iii) is wrapped
(methyl) acrylate-functional containing colloidal silica particles and with two or more (methyl) acrylate groups is poly-
Close the dispersion of object.
The invention further relates to coating base materials comprising：(a) include the base material of metal；(b) it is coated at least one of base material
First coating on point；(c) second coating being applied directly at least part of first coating.First coating is by including
It is prepared by coating composition below：(i) at least two different hydroxyl-functional polyester's polymer；(ii) hydroxyl-functional (methyl) third
Olefine acid ester polymer；(iii) sour function adhesion promoter；The crosslinking agent that (iv) is reacted with (i) and (ii).Second coating is by wrapping
Coating composition below is included to prepare：(i) hydroxyl-functional polyurethane comprising two or three (methyl) acrylate groups is poly-
Close object；(ii) at least two different hydroxyl-functional polyurethane polymerization comprising four or more (methyl) acrylate groups
Object；(iii) includes colloidal silica particles and (methyl) third with two or more (methyl) acrylate groups
The dispersion of olefin(e) acid ester functional polymer.In addition, the coating base material shows to be less than 20 according to what ASTM D523-14 were measured
60 ° of glossiness of a gloss unit, and at least adhesive force of 4B according to the B measurements of ASTM D3359-17 methods.
Description of the drawings
Fig. 1 is the judge picture of the wear resistance level for determining coating；With
Fig. 2 is the grading of the cross scratch attachment level for determining coating.
Specific implementation mode
For the purpose of following detailed description, it should be understood that the present invention can be used various replacements variation and step it is suitable
Sequence, unless specifically stated on the contrary.In addition, in the case of in addition in any operational instances or otherwise pointing out, indicate
Such as all numbers of the amount of the ingredient used in description and claims should be understood in all cases by term
" about " it modifies.Therefore, unless indicated to the contrary, the numerical parameter otherwise illustrated in the following description and appended dependent claims is root
The approximation changed according to the expected performance of the invention to be obtained.It is at least not intended to the applicable of doctrine of equivalents being limited in
In the scope of the claims, each numerical parameter at least according to the number of the effective digital of report and should pass through the common house of application
Enter technology to explain.
Although illustrating that the broad range of numberical range of the present invention and parameter are approximations, listed in specific example
Numerical value is reported as accurately as possible.However, any numerical value includes inherently the standard deviation found in being measured by its each self-test
The certain errors necessarily led to.
In addition, it should be understood that any numberical range as described herein is intended to include being included into all subranges therein.Example
Such as, the range of " 1 to 10 " is intended to include all sub- models between (and including) described minimum value 1 and the maximum value 10
It encloses, that is, there is the minimum value equal to or more than 1 and the maximum value equal to or less than 10.
In this application, unless expressly stated otherwise, singular use includes plural number and plural number includes odd number.In addition,
In the application, unless expressly stated otherwise, otherwise "or" is used to indicate "and/or", even if can clearly make in some cases
Use "and/or".In addition, in this application, unless expressly stated otherwise, otherwise using " one (a) " or " one (an) ", expression is " at least
One ".For example, "an" polymer, "an" coating composition etc. refers to any one or more in these articles.
The present invention relates to a kind of coating systems including at least first coating and second coating.As previously mentioned, first coating
By include at least one hydroxyl-functional polyester's polymer, sour function adhesion promoter and at least with hydroxyl-functional polyester's polymer it is anti-
It is prepared by the coating composition for the crosslinking agent answered.
As used herein, term " polymer " " refers to oligomer and homopolymer (for example, being prepared by single monomer type), is total to
Polymers (for example, being prepared by least two monomeric species) and graft polymers.Term " resin " can be used interchangeably with " polymer ".
As noted, polymer as described herein can be used to form the film as a coating part." film-forming resin " refers to removing
After any diluent or carrier present in composition, self-supporting continuous film can be formed on at least horizontal surface of base material
Resin.
The polyester polymers for being used to form the coating composition of first coating may include a hydroxy functional group or multiple hydroxyls
Base functional group, such as two or more or three or more hydroxy functional groups.Polyester polymers may also include others
Functional group, including but not limited to carboxylic acid group, epoxy group, carbamate groups, amide groups, urea groups, amino, mercapto and its group
It closes.Polyester polymers can be free of all other functional group, and only include hydroxy functional group.
The coating composition for being used to form first coating may include one or more polyester polymers.For example, the coating
Composition may include at least two different hydroxyl-functional polyester's polymer.Each polyester polymers may include one or more hydroxyls
Base group, such as two or more hydroxyl groups.In addition, each polyester polymers can include also independently other functional group,
All arbitrary functional groups as previously described.Alternatively, each polyester polymers can not include all other functional group independently, and
It only include hydroxy functional group.
Hydroxyl-functional polyester's polymer can account for the total solid weight based on the coating composition for being used to form first coating
At least 30wt%, or at least 40wt%.Hydroxyl-functional polyester's polymer can also be accounted for based on the coating group for being used to form first coating
Close the at most 60wt% of the total solid weight of object, or at most 50wt%.Hydroxyl-functional polyester's polymer can also be accounted for based on for shape
At first coating coating composition total solid weight such as, such as 30wt%-60wt% or 40wt%-50wt% it
Between range.
As previously mentioned, the coating composition for being used to form first coating further includes the friendship at least reacted with hydroxyl-functional polyester
Join agent.As used herein, term " crosslinking agent " refer to functional group comprising two or more with other functional group reactions and
The molecule of two or more monomers or polymer molecule can be keyed by chemistry.The non-limiting examples of crosslinking agent include different
Cyanurate, isocyanates, blocked isocyanate, melamine, phenolic resin, epoxy resin, beta-hydroxy (alkyl) amide tree
Fat, alkylated amine formate resin, (methyl) acrylate, polyacid, polyamines, polyamide, aminoplast, carbodiimide,
Aziridine and combinations thereof.As used herein, the terms such as " (methyl) acrylate " are methacrylate and acrylate two
Person.In some instances, crosslinking agent includes isocyanuric acid ester, isocyanates, blocked isocyanate, melamine or combinations thereof.
The non-limiting examples of isocyanates include polyfunctional isocyanate's (polyisocyanates), such as straight chain, branch and/
Or cyclo polyisocyanates.The example of multifunctional polyisocyanates includes aliphatic diisocyanate, and such as hexa-methylene two is different
Cyanate and isophorone diisocyanate and aromatic diisocyanate, such as toluene di-isocyanate(TDI) and 4,4'- hexichol
Methane diisocyanate.Polyisocyanates can be sealing end or uncapped.The example of other suitable polyisocyanates includes
Isocyanuric acid ester, such as isocyanurate trimer, allophanate and diisocyanate urea diketone (uretdiones of
Diisocyanates) and polycarbodiimide, such as in the 4th column 10-40 rows of the 8th, 389, No. 113 United States Patent (USP)
Disclosed, it is incorporated herein by reference.Suitable polyisocyanates is well known in the art, and widely commercially available.
The example of commercially available isocyanates includes can be commercially available from Covestro N 3300A、 Z 4470BA、3900 Hes of N N 3400。
The non-limiting examples of aminoplast include the condensation product of amine and/or amide and aldehyde.Most common amine or amide are
Melamine, urea or benzoguanamine.For example, the condensation product of melamine and formaldehyde is suitable aminoplast.However, can be used
With other amine or the condensation product of amide；For example, the aldehyde condensate of glycoluril.Although used aldehyde is typically formaldehyde, can make
With other aldehyde, such as acetaldehyde, crotonaldehyde and benzaldehyde.
Aminoplast includes methylol, and at least part of these groups can be with etherified to change cure response
(cure response).Any monohydric alcohol can be used for this purpose, including methanol, ethyl alcohol, butanol and hexanol.It is workable
The non-limiting examples of commercially available aminoplast include303、322、327、380 Hes1130 (can be obtained from Cytec Industries and/or Allnex).
Crosslinking agent can account for at least 30wt% of the total solid weight based on the coating composition for being used to form first coating, or
At least 35wt%.Crosslinking agent also can account for the total solid weight based on the coating composition for being used to form first coating at most
50wt%, or at least 45wt%.Crosslinking agent can also account for the total solid weight based on the coating composition for being used to form first coating
Such as, the range such as between 30wt%-50wt% or 35wt%-45wt%.
According to the present invention, the coating composition for being used to form first coating includes adhesion promoter.As used herein, " attached
Accelerating agent " refer to the adhesion for for example increasing coating and base material component or one group of component, such as monomer, polymer or its group
It closes.Adhesion promoter can be selected from it is one or more, such as at least two, acid functional compound.Suitable acid function attachment promotes
The non-limiting examples of agent include sour function phosphate.As used herein, " phosphate " refers to the ester derived from phosphoric acid.Suitably
Sour function phosphate can be from Noroo Co., and LTD is with trade name NAP-100 and from Lubrizol with trade name2063 buy.
As previously mentioned, phosphate may include one or more, such as at least two acid functional groups, and can be monomer or
Polymer.The coating composition for forming first coating may also include one or more sour function phosphates.It is applied for example, forming first
The coating composition of layer may include at least two different sour function phosphates.
Other than acid functional group, adhesion promoter may also include other functional group.For example, adhesion promoter, such as
Sour function phosphate, optionally include other functional group comprising but be not limited to amido, epoxy group, hydroxyl, mercapto,
Carbamate groups, amide groups, urea groups, isocyanate group (including blocked isocyanate base), ethylenically unsaturated groups and its
Combination." ethylenic bond is unsaturated " used herein refers to the group at least one carbon-to-carbon double bond.Ethylenically unsaturated groups
Non-limiting examples include but not limited to (methyl) acrylate group, vinyl groups and combinations thereof.It should be appreciated that attachment
Accelerating agent can be free of and (not include) any other reactive functional groups described before and can only include carboxylic acid group.
Adhesion promoter can account for the total solid weight based on the coating composition for being used to form first coating at least
0.5wt%, or at least 1wt%.Adhesion promoter can also account for the total solid based on the coating composition for being used to form first coating
The at most 3wt% of weight, or at most 2wt%.Adhesion promoter can also be accounted for based on the coating composition for being used to form first coating
Total solid weight such as, such as the range between 0.5wt%-3wt% or 1wt%-2wt%.
The coating composition for forming first coating may also include other resin.The other resin may include this field
It is any number of in the various thermoplasticity and/or thermosetting resin known.Term " thermosetting property " refers to irreversible in solidification or crosslinking
The resin on ground " solidification ", the polymer chain of wherein resin are linked together by covalent bond.Once solidification or crosslinking, thermosetting property tree
Fat will not be melted when applying heat, and not dissolve in solvent.As described above, the other resin may also include thermoplastic resin
Fat.Term " thermoplasticity " refers to the resin not connected by covalent bond, thus can undergo when heated liquid flowing and it is solvable
In certain solvents.
Term " curable ", " solidification " etc. mean that at least part resin material is crosslinked or cross-linking in composition
's.Solidification can occur at ambient conditions, by heat, or by other means, such as actinic radiation." environmental condition " refers to week
The condition in collarette border, the temperature, humidity and pressure of such as indoor or outdoors environment.Term " actinic radiation " refers to that can cause chemistry
The electromagnetic radiation of reaction.Actinic radiation include but not limited to visible light, ultraviolet (UV) light, infrared and near-infrared radiation, X-ray and
γ is radiated.
The other resin can be with various reactive functional groups it is any number of comprising but be not limited to carboxylic acid group,
Amine groups, epoxy group, hydroxyl group, thiol group, carbamate groups, amide group, urea groups, isocyanate groups
(including blocked isocyanate base), (methyl) acrylate group and combinations thereof.Thermosetting coating compositions generally include to be crosslinked
Agent can be selected from any crosslinking agent that the degree of functionality known in the art with resin that is being used in coating composition is reacted.Crosslinking
Agent may include any those of description before.Alternatively, the thermosetting resin with the functional group reacted with its own can be used；With
This mode, such thermosetting resin are self-crosslinkings.
The non-limiting examples of suitable other resin include polyurethane, except polyester noted earlier in addition to those, poly-
Amide, polyethers, polysiloxanes, fluoropolymer, polysulfide, polythiaether, polyureas, (methyl) acrylic resin, epoxy resin,
Vinylite, copolymer and its mixture.
In some non-limiting examples, the coating composition for forming first coating includes that one or more hydroxyl-functionals are poly-
Ester, such as at least two different hydroxyl-functional polyesters and at least one other polymer.For example, forming first coating
Coating composition includes one or more hydroxyl-functional polyesters, such as at least two different hydroxyl-functional polyesters, and at least one
(methyl) acrylate polymer of kind hydroxyl-functional.It can be with hydroxyl for the crosslinking agent of the coating composition or a variety of crosslinking agents
Functional polyester and/or the reaction of hydroxyl-functional (methyl) acrylate polymer.
Other polymer can account for the total solid weight based on the coating composition for being used to form first coating at least
30wt%, or at least 35wt%.Other polymer can also account for total solid based on the coating composition for being used to form first coating
The at most 50wt% of body weight, or at most 45wt%.Other polymer can be accounted for based on the coating group for being used to form first coating
Close the total solid weight of object such as, such as the range between 30wt%-50wt% or 35wt%-45wt%.
The coating composition for being used to form first coating may also include other material, such as colorant.As used herein,
" colorant " refers to any substance for assigning composition color and/or other opacities and/or other visual effects.Colorant
It can be added in coating in any suitable form, such as discrete particle, dispersion, solution and/or thin slice.Single colorant
Or in the mixture coating for use in the present invention of two or more colorants.
Exemplary colorant includes pigment (organic or inorganic), dyestuff and coloring agent, and such as those make in coatings industry
And/or the row in Dry Color Manufacturers Association (DCMA) (dry powder pigment manufacturer association)
Those of go out and special effect compositions.Colorant may include, is for example insoluble but wettable fine crushing solid under conditions of use
Body powder.Colorant can be organic or inorganic, and can be aggregation or non-agglomerated.Colorant can be by using grinding
Medium (its using will be familiar to the person skilled in the art), such as acrylic acid abrasive media is introduced into coating.
Exemplary pigment and/or color compositions include but not limited to the thick pigment of carbazole dioxazine, azo, monoazo, again
Nitrogen, naphthols AS, salt form (thin slice) (salt type (flakes)), benzimidazolone, isoindolinone, isoindoline and polycyclic
Phthalocyanine, quinacridone, purple cyclic ketones (perinone), diketopyrrolo-pyrrole, thioindigo, anthraquinone, indanthrone, anthra pyrimidine, Huang
Alkane scholar ketone, pyranthrone, three BaP -5,10- diketone (anthanthrone, anthanthrone), dioxazine, triaryl carbon, quinoline
Phthalein ketone pigment, diketopyrrolo-pyrrole red (" DPPBO is red "), titanium dioxide, carbon black and its mixture.Term " pigment " and " have
Color filler " is used interchangeably.
Exemplary dyestuff includes but not limited to solvent and/or those of water base, such as phthalocyanine green or indigo plant, iron oxide and vanadic acid
Bismuth.
Exemplary coloring agent includes but not limited to the pigment being dispersed in water base or water miscible carriers, such as can be from
The AQUA-CHEM 896 that Degussa, Inc. are bought, can be from Accurate Dispersions Division of Eastman
The CHARISMA COLORANTS and MAXITONER INDUSTRIAL COLORANTS that Chemical, Inc. are bought.
The other non-limiting examples that can be used for the material of the coating composition include plasticizer, abrasion resistant particles, antioxygen
Agent, hindered amine light stabilizer, UV light absorbers and stabilizer, surfactant, flowing and surface control agent, are urged at thixotropic agent
Agent, reaction suppressor and other conven-tional adjuvants.
As previously mentioned, second coating is applied directly at least part of first coating.Second coating is by including at least
Two different hydroxyl-functional polyurethane polymer with (methyl) acrylate group and include colloidal silica particles
It is prepared with the coating composition of the dispersion of (methyl) acrylate functional polymer with (methyl) acrylate group.
The hydroxyl-functional polyurethane polymer being used to form in the coating composition of second coating includes including at least one
The hydroxyl-functional polyurethane polymer of two or three (methyl) acrylate groups.The coating composition for forming second coating can
Including a kind of hydroxyl-functional polyurethane polymer, there are two or three (methyl) acrylate groups or a variety of, such as extremely
Few two kinds of hydroxyl-functional polyurethane polymer include two or three (methyl) acrylate groups each independently.For example,
The coating composition for forming second coating may include a kind of hydroxyl-functional polyurethane polymer, and it includes two or three (methyl)
Acrylate group.Alternatively, formed second coating coating composition may include the first hydroxyl-functional polyurethane polymer and
Other hydroxyl-functional polyurethane polymer, the first hydroxyl-functional polyurethane polymer include two or three (methyl) third
Enoate group, the other hydroxyl-functional polyurethane polymer include two or three (methyl) acrylate groups and
It is different from the first hydroxyl-functional polyurethane polymer.
The coating composition for forming second coating further includes at least one with four or more (methyl) acrylate
The hydroxyl-functional polyurethane of group, such as at least five (methyl) acrylate groups or at least six (methyl) acrylate
Polymer.The coating composition for forming second coating may include that one kind having four or more (methyl) acrylate groups
Hydroxyl-functional polyurethane polymer is a variety of, such as at least two hydroxyl-functional polyurethane polymer, includes each independently
Four or more (methyl) acrylate groups.For example, the coating composition for forming second coating may include that a kind of includes extremely
The hydroxyl-functional polyurethane polymer of few six (methyl) acrylate groups.Alternatively, forming the coating composition of second coating
It may include the second hydroxyl-functional polyurethane polymer and other hydroxyl-functional polyurethane polymer, second hydroxyl-functional
Polyether polyols are for example comprising four or more, such as at least six (methyl) acrylate groups, the other hydroxyl
Base functional polyurethanes polymer is for example comprising four or more, such as at least six (methyl) acrylate groups, and it is not
It is same as the second hydroxyl-functional polyurethane polymer.
The aforementioned polyether polyols being used to form in the coating composition of second coating can include one each independently
Hydroxyl or multiple hydroxyl groups, such as at least two or at least three hydroxyls.For example, being used to form the Coating material composition of second coating
All polyether polyols in object can include at least two hydroxyls each independently.
The aforementioned polyether polyols being used to form in the coating composition of second coating may include that aliphatic polyurethane is poly-
Close object.As used herein, term " aliphatic " refers to non-aromatic straight chain, branch or cyclic hydrocarbon structures containing saturated carbon key.
The saturated carbon chains of aliphatic structure or a plurality of carbochain also may include other elements and interrupted by other elements, the element include but
It is not limited to oxygen, nitrogen, carbonyl and combinations thereof.It should be appreciated that being used to form the aforementioned polyurethane in the coating composition of second coating
Polymer can be each independently selected from aliphatic urethane polymer.
Hydroxyl-functional polyurethane polymer with two or three (methyl) acrylate groups can be accounted for based on for shape
At at least 5wt% of the total solid weight of the coating composition of second coating, at least 8wt%, or at least 10wt%.There are two tools
Or the hydroxyl-functional polyurethane polymer of three (methyl) acrylate groups can also be accounted for based on the painting for being used to form second coating
The at most 25wt% of the total solid weight of feed composition, or at most 20wt%.It is acrylate-based with two or three (methyl)
The hydroxyl-functional polyurethane polymer of group can also account for the total solid weight based on the coating composition for being used to form second coating
Such as, the range such as between 5wt%-25wt% or 10wt%-20wt%.
Hydroxyl-functional polyurethane polymer with four or more (methyl) acrylate groups, which can account for, to be based on being used for
Form at least 20wt%, at least 25wt%, or at least 30wt% of the total solid weight of the coating composition of second coating.Have
The hydroxyl-functional polyurethane polymer of four or more (methyl) acrylate groups, which can account for, to be based on being used to form second coating
Coating composition total solid weight at most 40wt%, or at most 50wt%.With four or more (methyl) propylene
The hydroxyl-functional polyurethane polymer of acid esters group can account for the total solid weight based on the coating composition for being used to form second coating
It measures such as, such as the range between 20wt%-50wt% or 30wt%-40wt%.
The coating composition for forming second coating further includes containing colloidal silica particles and having two or more
The dispersion of (methyl) acrylate functional compound of (methyl) acrylate group.As used herein, " colloidal silicon dioxide
Particle " refers to the form of the synthetic silica derived from quartz sand.The colloidal silica particles can have variously-shaped
(or form) and size.For example, core-shell particle could generally have spherical shape, cube, plate, polyhedron or needle-shaped (elongated or fine
Tie up shape) form.Colloidal silica particles also can have various sizes, such as 1 to 1000 nanometer or 10 to 500 nanometers or 50
To 200 nanometers or 10 to 100 nanometers of average particle size.Colloidal silica particles can also have more than 1 micron, all such as larger than 2
Micron or the average particle size more than 5 microns.As used herein, " average particle size " refers to volume average particle sizes.
In addition, (methyl) acrylate functional compound with two or more (methyl) acrylate groups can wrap
Include the monomer with two or more (methyl) acrylate groups, polymer or combinations thereof.As indicated, (methyl) acrylic acid
Ester functional compounds may include two (methyl) acrylate groups.In some non-limiting examples, (methyl) acrylate
Functional compound includes at least three (methyl) acrylate groups, at least four (methyl) acrylate groups, at least five
(methyl) acrylate group or at least six (methyl) acrylate groups.
(methyl) acrylate functional compound with two or more (methyl) acrylate groups may also comprise
Other functional group comprising but it is not limited to any other functional group above-mentioned.For example, having two or more (methyl)
(methyl) acrylate functional compound of acrylate group also may include one or more, such as at least two, or at least
Three hydroxyls.
Including (methyl) acrylate functional monomers' of two or more (methyl) acrylate groups is non-limiting
Example includes trimethylolpropane two (methyl) acrylate, trimethylolpropane tris (methyl) acrylate, pentaerythrite three
(methyl) acrylate, dipentaerythritol five (methyl) acrylate and combinations thereof.In addition, including two or more (methyl) third
The non-limiting examples of suitable (methyl) acrylate functional polymer of enoate group include it is any it is above-mentioned include two
The polymer of a or more (methyl) acrylate group.
The dispersion can account for the total solid weight based on the coating composition for being used to form second coating at least
30wt%, at least 35wt%, or at least 40wt%.The dispersion can be accounted for based on the coating composition for being used to form second coating
Total solid weight at most 60wt%, at most 55wt%, or at most 50wt%.The dispersion can be accounted for based on being used to form the
The total solid weight of the coating composition of two coatings such as, such as between 30wt%-60wt% or 40wt%-50wt%
Range.
The coating composition for being used to form second coating may also include precipitated silica particles.Precipitated silica can be added
Silicon particle is to reduce glossiness.The precipitated silica particles can be accounted for based on the coating composition for being used to form second coating
At least 3wt% of total solid weight, or at least 5wt%.The precipitated silica particles, which can account for, to be based on being used to form the second painting
The at most 15wt% of the total solid weight of the coating composition of layer, or at most 10wt%.The precipitated silica particles can account for
Total solid weight based on the coating composition for being used to form second coating such as, such as 3wt%-15wt% or 5wt%-
Range between 10wt%.
The coating composition for being used to form second coating may also include other material.For example, being used to form second coating
Coating composition may also include any previously described other resin, crosslinking agent, colorant, plasticizer, abrasion resistant particles, anti-
Oxidant, hindered amine light stabilizer, UV light absorbers and stabilizer, surfactant, flowing and surface control agent, thixotropic agent,
Catalyst, reaction suppressor and other conven-tional adjuvants.
In addition, when UV light is used to cure the coating composition of the present invention, it is such as used to form the coating group of second coating
Object is closed, the composition usually contains Photoepolymerizationinitiater initiater (also referred herein as " photoinitiator ") and/or photopolymerization sensitizer
(also referred herein as " photosensitizer ").The non-limiting examples of photoinitiator and photosensitizer include isobutyl benzoin ether, butyl
Mixture, the α of the butyl isomer of benzoin ether, α-diethoxy acetophenone, α-alpha, alpha-dimethyl oxygroup-α-phenyl acetophenone, two
Benzophenone, anthraquinone, thioxanthones and phosphine oxide.It is also commercially available to be suitable for the invention photoinitiator, such as can from BASF with
Trade name1173 HesPhotoinitiator commercially available from 184.Also UV stabilizer can be added, wrap
Include but be not limited to benzotriazole, hydroxy benzenes triazine (hydrophenyl triazines) and hindered amine light stabilizer, such as can be from
Ciba Specialty Chemicals those of are bought with its TINUVIN series.
The coating system of the present invention can be applied to various base materials known to coatings industry.For example, the coating system
It can be applied to automotive substrates, industrial base material, aircraft and aircraft component, ship base material and component, such as warship, ship and bank
Upper and offshore installations, storage tank, windmill, nuclear power station, packaging base material, timber floor and furniture, clothes, electronic equipment, including shell and
Circuit board, glass and transparent film, sports equipment, including golf, stadiums, building, bridge etc..The base material example
It such as can be metal or nonmetallic.Metal base includes but not limited to tin, steel (including electrolytic zinc-coated steel sheet, cold-rolled steel, galvanizing by dipping
Steel etc.), aluminium, aluminium alloy, Zn-Al alloy, the steel and aluminum-plated steel for being coated with Zn-Al alloy.Non-metallic substrate includes polymer, modeling
Material, polyester, polyolefin, polyamide, cellulose, polystyrene, polyacrylic acid, polyethylene naphthalate, polypropylene, poly- second
Alkene, nylon, EVOH, polylactic acid, other " green " polymeric substrates, polyethylene terephthalate (PET), makrolon,
Polycarbonate acrylonitrile butadiene styrene (PC/ABS), polyamide, timber, veneer, composite wooden material, particieboard, middle density
Fiberboard, cement, stone material, glass, paper, cardboard, textile, synthesis and natural leather etc..
Base material may also include metal plastic base material.As used herein, " metal plastic base material " refers to by plastics and gold
Belong to the base material that the two is formed.For example, metal plastic base material may include plastic material, it includes be incorporated into plastic material neutralize/
Or the metal material at least part coated in plastic material.
When being at least partially coating on consumer electrical product, the coating system is particularly useful.For example, this
The coating of invention can be applied to see on laptop, tablet computer, keyboard, mobile phone, other hand-hold electronic equipments etc.
Base material.Based on above-mentioned, the invention also includes the electronic products with the surface for being at least partially coated with coating described herein
Or electronic unit.It should be appreciated that consumer electrical product can be formed by any previous materials, such as metal plastic.
During coating system is applied, the coating composition for forming first coating is applied at least part of base material
On, and at ambient temperature first coating is formed with heat and/or the dehydration of other means of such as actinic radiation and/or solidification.
Then the coating composition for forming second coating is applied at least part of first coating, and uses heat at ambient temperature
And/or the dehydration of other means and/or solidification of such as actinic radiation, form second coating.
It is coated on base material it should be appreciated that first coating can be used as prime coat, and second coating can be used as top coat layer painting
It overlays in first coating.As used herein, " primer coating " refers to that can be deposited on base material to prepare for coating protectiveness
Or the priming coat on the surface of decorative coating.In addition, " finishing coat " refers to being deposited on another coating such as priming paint to provide protection
And/or the top coating of decorative layer.
Second coating also can be used as transparent top coat layer coating.As used herein, " clear coat " refers at least substantially
Transparent or fully transparent coating.Term " substantially transparent " refers to such coating, wherein when through coating observation, coating is another
The surface on one side is macroscopic at least partly.Term " fully transparent " refers to such coating, wherein when through coating
When observation, the surface of coating another side is fully macroscopic.It should be appreciated that transparent area enamelled coating may include colorant, it is all
Such as pigment, condition is the expectation transparency that colorant does not interfere transparent area enamelled coating.Alternatively, transparent area enamelled coating is free of colorant, it is all
Such as pigment (that is, uncoloured).
The coating composition of the present invention can be coated by the method for any standard in this field, such as electropaining, spraying, electrostatic
Painting, dipping, roller coating, brushing etc., are then formed by curing coating.The first coating of the present invention can be coated to 1 micron to 100 microns,
Or 2 microns to 50 microns or 5 microns to 20 microns of thickness of dry film.In addition, the second coating of the present invention can be coated to 1 micron
To 100 microns or 2 microns to 50 microns or 5 microns to 20 microns of thickness of dry film.
It has been found that the coating system of the present invention shows low-luster, good wearability and good adhesion.Example
Such as, it has been found that coating system of the invention, which is provided, to be surveyed using the miniature Three-angle gloss meters of BYK according to ASTM D523-14
60 ° of glossiness less than 20 gloss units of amount, according at least adhesive force of 4B that ASTM D3359-17 methods B is measured, and
Use 5750 linear abrasion wear test machine of Taber models (60 cycles per minute, CS-17 grinding agents and 1Kg loads) basis
The excellent abrasive resistance that ASTM D6279-15 are measured.The wearability that coating system is further assessed using chart shown in FIG. 1, with
And the adhesion of coating system is further assessed using chart shown in Fig. 2.
Following embodiment is presented to illustrate the General Principle of the present invention.The present invention should not be considered limited to presented tool
Body embodiment.Unless otherwise indicated, all parts and percentages in embodiment are by weight.
Embodiment 1
The preparation of paint base composition
Paint base composition is prepared by listing component in table 1.
Table 1
1Hydroxy-functional acrylic ester resin, can be commercially available from Forshan Tod Chemical Industry Co., LTD.
2Epoxy-ester phosphoric acid, can be commercially available from Noroo Co., LTD.
3Hydroxyl-functional polyester from PPG.
4Hydroxyl-functional polyester, can be commercially available from Wuxi Wanbo Coating Chemical Co., LTD.
5Flow promortor, commercially available from Kusmoto Chemicals LTD.
6Polymer phosphate ester solution, commercially available from Lubrizol.
7The mixture of organic solvent.
8Hexamethylene diisocyanate (HDI) isocyanurate trimer.
It will be listed in table 1 in addition to the component of curing agent and diluent is weighed and stir about 15 minutes or in room in a reservoir
Temperature is lower until uniformly.Then curing agent and diluent are added before spraying and mixes one minute to ensure the abundant of all components
Mixing.The sprayed coating mixture in the mixing one hour of all components, it is such as further described in detail herein.
Embodiment 2-3
The preparation of clear coat composition
Part A：Two kinds of coating compositions are prepared by the component listed in table 2.
Table 2
9Bifunctional aliphatic urethane acrylate resin, can be commercially available from Eternal Materials Co., LTD.
10Six acrylate of aliphatic polyurethane, can be commercially available from Eternal Materials Co., LTD.
11Six acrylate of aliphatic polyurethane, can be commercially available from Eternal Materials Co., LTD.
12Precipitated silica particles, commercially available from Shanghai FEP International Trading.
13The colloidal silicon dioxide of (TMPTA) is dispersed in trimethylolpropane trimethacrylate, commercially available from Evonik.
14Siliceous surface additive, commercially available from BYK.
15Fluorine-carbon modified polyacrylic acid, commercially available from Afcona Additives.
16Photoinitiator (2,4,6- trimethylbenzoyl diphenyl phosphine oxide), commercially available from BASF.
17Photoinitiator (α hydroxy-ketones), commercially available from BASF.
18Photoinitiator (1- hydroxy-cyclohexyl -1- phenyl ketones), commercially available from BASF.
19ORGANIC SOLVENT MIXTURES.
By mix respectively and be connected to all components listed in the Cowles blade stirrings table 2 of air motor until
Uniformly, the coating composition of sample A and B is prepared.
Part B：By mixing the sample according to table 3 respectively in the mixing vessel with the blade being connected on air motor
Product A and B about 15 minutes prepare two kinds of coating compositions.
Table 3
| Component | Embodiment 2 (gram) | Embodiment 3 (gram) |
| Sample A | 80 | 55 |
| Sample B | 50 | 45 |
Embodiment 4
The coating and assessment of low gloss coatings
The paint base composition spray metalization of Iwata LRA-200HVLP air atomization spray guns embodiment 1 is used to mould first
Expect base material.During coating, normal air is atomized overlapping coating and sprays pattern in 72 °F +/- 5 °F and 50%R.H.+/- 25%
R.H. it is coated to down on each base material.Uncoated metal film checks that plate is also located next to metalized substrate and sprays, to measure dry film
Thickness (DFT).So that coated base material and film is checked that plate flashes 10 minutes at ambient conditions, then in A grades of electric ovens in
It is toasted 30 minutes at 70 DEG C.After being taken out in baking oven, using Fischerscope MMS Permascope, according to ASTM
The DFT that D7091-13 measures priming paint is 10-12 μm.
Next, the clear coat composition of embodiment 2 and 3 to be respectively coated on to cured bottom in the same manner as described above
On lacquer coat.The base material of coating and film will be checked that base material flashes five minutes at ambient conditions, then in A grades of electric dry ovens
It is toasted 10 minutes at 70 DEG C.The radiation curing of top varnish is carried out using the UV processors equipped with medium pressure mercury lamp.The peaks UV irradiation level
It is set as 170mW/cm with energy density2And 800mJ/cm2(EIT power disk/UV-A/320-390nm).After UV solidifications, use
Fischerscope MMS-Permascope, the DFT that varnish is measured according to ASTM D7091-13 are 10-12 μm.
After coating metal plastic base material, the glossiness, wearability and adhesive force of coated base material are tested.Test knot
Fruit is shown in Table 4.
Table 4
21It is measured according to ASTM D523-14 using the miniature Three-angle gloss meters of BYK.
225750 linear abrasion wear test machine of Taber models (60 cycles per minute, CS- are used according to ASTM D6279-15
17 grinding agents and 1Kg loads) and measured using the grading chart of Fig. 1.
23It is measured using the grading chart of 1mm scribings spacing and Fig. 2 according to ASTM D3359-17 methods B.
The invention further relates to terms hereinafters.
Clause 1：A kind of coating system, including：(a) first coating by being prepared including coating composition below：(i) extremely
A kind of few hydroxyl-functional polyester's polymer；(ii) sour function adhesion promoter；The crosslinking agent that (iii) is reacted with (i)；(b)
The second coating being applied directly at least part of first coating, the second coating is by including coating composition below
It prepares：(i) include the first hydroxyl-functional polyurethane polymer of two or three (methyl) acrylate groups；(ii) include four
Second hydroxyl-functional polyurethane polymer of a or more (methyl) acrylate group；(iii) includes colloidal silica
Silicon particle and with two or more (methyl) acrylate groups (methyl) acrylate functional polymer dispersion.
Clause 2：Coating system as described in clause 1, wherein the coating composition for forming first coating further includes hydroxyl official
Energy (methyl) acrylate polymer, and the wherein described crosslinking agent and hydroxyl-functional polyester's polymer and the hydroxyl official
It can the reaction of (methyl) acrylate polymer.
Clause 3：Coating system as described in clause 2 or 3, wherein the coating composition for forming first coating includes at least two
The different hydroxyl-functional polyester's polymer of kind, and the wherein described crosslinking agent and each hydroxyl-functional polyester's polymer reaction.
Clause 4：Such as clause 1-3 any one of them coating systems, wherein the acid function adhesion promoter includes at least
A kind of phosphate of acid function.
Clause 5：Such as clause 1-4 any one of them coating systems, wherein the crosslinking agent includes isocyanates, isocyanide urea
Acid esters, melamine or combinations thereof.
Clause 6：Such as clause 1-5 any one of them coating systems, wherein the second hydroxyl-functional polyurethane polymer
(b) (ii) includes at least six (methyl) acrylate groups.
Clause 7：Such as clause 1-6 any one of them coating systems, wherein the coating composition for forming second coating includes
At least two different hydroxyl-functional polyurethane polymer for including four or more (methyl) acrylate groups.
Clause 8：Such as clause 1-7 any one of them coating systems, wherein each hydroxyl-functional polyurethane of second coating
Polymer includes hydroxyl-functional aliphatic urethane polymer.
Clause 9：Such as clause 1-8 any one of them coating systems, wherein the coating composition for forming second coating also wraps
Include precipitated silica particles.
Clause 10：Coating system as described in clause 9, wherein the coating composition for forming second coating includes based on described
The precipitated silica particles of the total weight 3wt% to 15wt% of coating composition.
Clause 11：Such as clause 1-10 any one of them coating systems, wherein the coating system is showed according to ASTM
60 ° of glossiness less than 20 gloss units that D523-14 is measured, and measured at least according to ASTM D3359-17 methods B
The adhesive force of 4B.
Clause 12：At least partially by the base material of clause 1-11 any one of them coating systems coating.
Clause 13：Coating base material as described in clause 12, wherein the base material includes metal.
Clause 14：Coating base material as described in clause 12 or 13, wherein the base material includes metal plastic.
Clause 15：A kind of coating base material, including：(a) include the base material of metal；(b) it is coated at least the one of the base material
First coating on part, the first coating is by including prepared by coating composition below：(i) at least two different hydroxyl official
It can polyester polymers；(ii) hydroxyl-functional (methyl) acrylate polymer；(iii) sour function adhesion promoter；(iv) with
(i) crosslinking agent reacted with (ii)；(c) second coating being applied directly at least part of the first coating, should
Second coating is by including prepared by coating composition below：(i) include the hydroxyl of two or three (methyl) acrylate groups
Functional polyurethanes polymer；(ii) at least two different hydroxyl official for including four or more (methyl) acrylate groups
It can polyether polyols；(iii) includes colloidal silica particles and has two or more (methyl) acrylate-based
The dispersion of (methyl) acrylate functional polymer of group is surveyed wherein the coating base material is showed according to ASTM D523-14
60 ° of glossiness less than 20 gloss units of amount, and at least attachment of 4B according to the B measurements of ASTM D3359-17 methods
Power.
Clause 16：Coating base material as described in clause 15, wherein the base material includes metal plastic.
Clause 17：Coating base material as described in clause 15 or 16, wherein the acid function adhesion promoter includes at least one
The sour function phosphate of kind.
Clause 18：If clause 15-17 any one of them coats base material, wherein forming the coating composition packet of second coating
Include the precipitated silica particles of the total weight 3wt% to 15wt% based on the coating composition.
Clause 19：If clause 15-18 any one of them coat base material, wherein the crosslinking agent include isocyanates, it is different
Cyanurate, melamine or combinations thereof.
Clause 20：If clause 15-19 any one of them coats base material, wherein each hydroxyl-functional of the second coating
Polyether polyols include hydroxyl-functional aliphatic urethane polymer.
Although the specific implementation mode of the present invention is had been described above for illustrative purposes, however, for this field
It is obvious to the skilled person that countless changes can be carried out without departing from being defined such as appended claims to the details of the present invention
The present invention.
Claims (20)
1. a kind of coating system, including：
(a) first coating by being prepared including coating composition below：
(i) at least one hydroxyl-functional polyester's polymer；
(ii) sour function adhesion promoter；With
(iii) crosslinking agent reacted with (i)；With
(b) second coating being applied directly at least part of first coating, the second coating is by including painting below
It is prepared by feed composition：
(i) include the first hydroxyl-functional polyurethane polymer of two or three (methyl) acrylate groups；
(ii) include the second hydroxyl-functional polyurethane polymer of four or more (methyl) acrylate groups；With
(iii) include colloidal silica particles and (methyl) propylene with two or more (methyl) acrylate groups
The dispersion of acid esters functional polymer.
2. coating system as described in claim 1, wherein the coating composition for forming first coating further includes hydroxyl-functional (first
Base) acrylate polymer, and the wherein described crosslinking agent and hydroxyl-functional polyester's polymer and the hydroxyl-functional (first
Base) acrylate polymer reaction.
3. coating system as described in claim 1, wherein the coating composition for forming first coating includes at least two different
Hydroxyl-functional polyester's polymer, and the wherein described crosslinking agent and each hydroxyl-functional polyester's polymer reaction.
4. coating system as described in claim 1, wherein the acid function adhesion promoter includes at least one sour function phosphorus
Acid esters.
5. coating system as described in claim 1, wherein the crosslinking agent includes isocyanates, isocyanuric acid ester, melamine
Amine or combinations thereof.
6. coating system as described in claim 1, wherein the second hydroxyl-functional polyurethane polymer (b) (ii) includes extremely
Few six (methyl) acrylate groups.
7. coating system as described in claim 1, wherein the coating composition for forming second coating includes at least two different
The hydroxyl-functional polyurethane polymer for including four or more (methyl) acrylate groups.
8. each hydroxyl-functional polyurethane polymer of coating system as described in claim 1, wherein second coating includes hydroxyl
Base functional aliphatic's polyether polyols.
9. coating system as described in claim 1, wherein the coating composition for forming second coating further includes precipitated silica
Silicon particle.
10. coating system as claimed in claim 9, wherein the coating composition for forming second coating includes being based on the coating
The precipitated silica particles of the total weight 3wt% to 15wt% of composition.
11. coating system as described in claim 1, wherein the coating system is showed according to ASTM D523-14 measurements
Less than 60 ° of glossiness of 20 gloss units, and according at least adhesive force of 4B of ASTM D3359-17 methods B measurements.
12. at least partially by the base material of coating system as described in claim 1 coating.
13. coating base material as claimed in claim 12, wherein the base material includes metal.
14. coating base material as claimed in claim 12, wherein the base material includes metal plastic.
15. a kind of coating base material, including：
(a) include the base material of metal；
(b) first coating being coated at least part of the base material, the first coating is by including Coating material composition below
It is prepared by object：
(i) at least two different hydroxyl-functional polyester's polymer；
(ii) hydroxyl-functional (methyl) acrylate polymer；
(iii) sour function adhesion promoter；With
(iv) crosslinking agent reacted with (i) and (ii)；With
(c) second coating being applied directly at least part of the first coating, the second coating is by including below
It is prepared by coating composition：
(i) include the hydroxyl-functional polyurethane polymer of two or three (methyl) acrylate groups；
(ii) at least two different hydroxyl-functional polyurethane polymerization comprising four or more (methyl) acrylate groups
Object；With
(iii) include colloidal silica particles and (methyl) propylene with two or more (methyl) acrylate groups
The dispersion of acid esters functional polymer,
The wherein described coating base material shows the 60 ° of glossiness less than 20 gloss units measured according to ASTM D523-14,
And at least adhesive force of 4B measured according to ASTM D3359-17 methods B.
16. coating base material as claimed in claim 15, wherein the base material includes metal plastic.
17. coating base material as claimed in claim 15, wherein the acid function adhesion promoter includes at least one sour function
Phosphate.
18. the base material coated as claimed in claim 15, wherein the coating composition for forming second coating includes based on described
The precipitated silica particles of the total weight 3wt% to 15wt% of coating composition.
19. coating base material as claimed in claim 15, wherein the crosslinking agent includes isocyanates, isocyanuric acid ester, trimerization
Cyanamide or combinations thereof.
20. coating base material as claimed in claim 15, wherein each hydroxyl-functional polyurethane polymer of the second coating
Including hydroxyl-functional aliphatic urethane polymer.
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Application publication date: 20180720 |