CN111777938A - Polyurethane finish paint for floor paint surface and construction method thereof - Google Patents
Polyurethane finish paint for floor paint surface and construction method thereof Download PDFInfo
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- CN111777938A CN111777938A CN202010612505.9A CN202010612505A CN111777938A CN 111777938 A CN111777938 A CN 111777938A CN 202010612505 A CN202010612505 A CN 202010612505A CN 111777938 A CN111777938 A CN 111777938A
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Classifications
-
- 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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
-
- 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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a polyurethane finish paint for a floor paint surface and a construction method thereof, wherein the polyurethane finish paint comprises a component A, a component B, a component C and a component D; based on the total weight of the component A, the component A comprises 60-90 wt% of aliphatic isocyanate curing agent and 10-40 wt% of aliphatic active isocyanate curing agent diluent; the B component comprises the following components in percentage by weight based on the total weight of the B component: 10-20 wt% of castor oil polyol, 15-25 wt% of solvent-free hydroxyl-containing polyacrylic resin, 3-5 wt% of wetting dispersant, 0.2-0.6 wt% of anti-floating and anti-floating auxiliary agent, 25.1-35.5 wt% of pigment, 24-43 wt% of filler, 0.4-0.8 wt% of rheological auxiliary agent, 0.5-1 wt% of defoaming agent, 0.3-0.7 wt% of flatting agent, 0.1-0.3 wt% of catalyst and 1-3 wt% of matting powder; the component C is white alundum powder; the component D is hydroxyl-terminated polydimethylsiloxane. The coating formed by the coating has good wear resistance and easy cleaning property.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a polyurethane finish coating for a floor paint surface and a construction method thereof.
Background
The epoxy floor has the advantages of beautiful appearance, high integral seamless strength, good chemical resistance and the like, and is widely applied to industrial plants, underground garages and other places. However, it is well known to those skilled in the art that epoxy flooring surfaces are susceptible to wear and tear if used for a somewhat longer period of time or inadvertently left over during use. This greatly affects the aesthetics of the epoxy floor paint. Therefore, various wear-resistant floor coatings have been continuously developed in recent years. Among them, the wear-resistant coating using polyurethane-based main film-forming material is most frequently present, and is about 90% or more. This is because there is a large amount of hydrogen bonding between the flexible molecular chains of the polymer of the polyurethane. When the polyurethane flexible molecular chain is subjected to external force, the hydrogen bond action of the polyurethane flexible molecular chain is destroyed; after most external force is consumed to do work, the hydrogen bond action among the polyurethane molecular chains is recovered again. Based on the outstanding viscoelastic characteristic, the polyurethane floor coating has abrasion resistance obviously superior to that of an epoxy floor coating. In addition, at present, many construction workers in the industry often adopt a method of throwing quartz sand with certain particle size distribution on the surface of the just constructed epoxy coating to improve the wear resistance and scratch resistance of the epoxy floor.
At present, the popular terrace market is solvent type high-solid super wear-resistant polyurethane finish paint. Most manufacturers have coatings consisting of three components, a, B and C. The component A is an isocyanate curing agent diluted by a solvent; the component B consists of resin with hydroxyl, pigment and filler, an auxiliary agent and a solvent; the component C is wear-resistant aggregate. The proportion of A, B and C is different for different manufacturers. In this system, the polymer film-forming process mainly includes two reactions of isocyanate and hydroxyl resin crosslinking and isocyanate self-crosslinking. Isocyanate and hydroxyl resin react to produce a polyurethane structure; isocyanates produce a dense polyurea structure by self-crosslinking. The polymer coating formed by these two reactions has very excellent physical and chemical properties. The main function of the wear-resistant aggregate is to form a plurality of fine bulges on the surface of the coating so as to reduce the damage of an acting object to the coating. The polymer structure combines the wear-resistant aggregate with reasonable particle size distribution to form a coating which not only has excellent wear resistance and scratch resistance, but also has very good chemical resistance.
Xijing and the like invent an oily super wear-resistant polyurethane floor paint finish paint. The coating A component consists of grease polyol, an auxiliary agent, pigment and filler, a solvent and anti-scratch auxiliary agent polytetrafluoroethylene wax powder, and the B component consists of a prepolymer synthesized by polyester polyol, isophorone diisocyanate (IPDI) and an acrylate monomer. The floor system formed by the coating after curing is seamless and durable, has good decoration and comfort, and is an industrial floor finish with excellent wear resistance.
In recent years, with the enhancement of environmental awareness and the advocated national policy, various water-based coatings are greatly developed. In the field of floor coatings, a plurality of wear-resistant coating technologies taking water-based polyurethane as a main film forming substance also appear. The invention discloses a finishing paint for a waterborne super-wear-resistant polyurethane floor paint and a preparation method thereof. The wear-resistant floor coating comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 4: 1. The component A comprises deionized water, hydroxyl acrylic emulsion, pigment and filler, an auxiliary agent and a scratch-resistant auxiliary agent; the component B consists of hydrophilic modified aliphatic isocyanate and solvent. The wear-resistant coating film-forming material is formed by reacting and crosslinking hydroxyl acrylic resin and hydrophilic modified aliphatic isocyanate. The film forming mechanism belongs to heterogeneous film forming. The coating is based on the viscoelastic characteristic of polyurethane and the scratch-resistant auxiliary agent on the surface of the paint, and has better wear resistance.
Ginger-year-old discloses a high-hardness two-component waterborne polyurethane coating. The coating consists of two components A and B. The component A is hydrophilic modified aliphatic isocyanate with 100 percent of solid content; the component B comprises deionized water, hydroxyl acrylic acid dispersoid, auxiliary agent, pigment and filler and high-strength ceramic microspheres. The invention patent is characterized in that the mass ratio of A to B is 10: 1. In this case, the hydrophilic modified aliphatic isocyanate curing agent becomes a main film-forming substance of the coating layer. The hydrophilic modified aliphatic isocyanate has relatively small molecular weight and functionality greater than 3, and through self-crosslinking reaction, a paint film with high crosslinking density can be formed. Meanwhile, the ceramic microspheres with high strength form small bulges on the surface of the coating, and the bulges are preferentially contacted with an object acting on the coating, so that the abrasion degree of the coating in the use process can be greatly reduced. Based on the film forming material with high crosslinking density and the ceramic microspheres with high surface strength, the coating has very excellent mechanical properties and excellent wear resistance.
Wumengling and the like invent a high-wear-resistance water-based anti-fouling self-cleaning polyurethane finish paint. According to the invention, through the triple effects of the organic silicon modified polyurethane emulsion, the fluorocarbon emulsion and the nano elastomer particles, the surface energy is reduced, and meanwhile, a rough nano structure is constructed on the surface of the coating, so that the coating has super-hydrophobic performance and anti-pollution self-cleaning effect, and meanwhile, the introduced nano elastomer particles enable the super-hydrophobic coating to have high wear resistance.
The existing solvent-based super wear-resistant polyurethane finish paint for floor paint has the problems of high VOC content, large smell, dangerous production, storage and transportation and harm to the health of constructors. This is because the solvent-borne polyurethane topcoat coating contains a relatively large amount of volatile solvents such as esters and alcohol ethers.
The prior finishing paint for the waterborne super wear-resistant polyurethane floor paint has the problems of poorer physical and chemical properties, high cost and difficult wastewater treatment compared with solvent-based products. The reason is that the film forming mechanism of the finish coat for the waterborne polyurethane floor paint is heterogeneous film forming, a paint film is not compact enough, the coat contains more hydrophilic structures, and a certain amount of waterborne cosolvent which is soluble with water but is difficult to separate is required to be added in the preparation processes of the polymer emulsion and the paint.
In addition, the solvent type polyurethane finish coat for the super wear-resistant floor paint and the water-based finish coat for the super wear-resistant polyurethane floor paint have the problem of difficult cleaning. The reason is that the assembled wear-resistant aggregate is added when the super wear-resistant polyurethane coating is prepared, so that a surface with high roughness is formed. Some contaminants, especially those with adhesive properties, once embedded in the superabrasive coating surface, are difficult to clean.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the polyurethane finish paint for the floor paint surface, the paint formula system does not contain solvent, the VOC is extremely low, the paint is safe and environment-friendly, the film forming mechanism is homogeneous film forming, and the coating has the same excellent physical and chemical properties as a solvent-based system. Meanwhile, the coating disclosed by the invention has the characteristics of easiness in cleaning, difficulty in adhesion and easiness in stripping after adhesion, and the problem that the super-wear-resistant floor coating in the existing market is difficult to clean is solved.
In order to achieve the above objects, an aspect of the present invention provides a polyurethane top coating for a floor finish surface, the polyurethane top coating comprising an a component, a B component, a C component, and a D component;
the component A comprises the following components in percentage by weight: 60-90 wt% of aliphatic isocyanate curing agent and 10-40 wt% of aliphatic active isocyanate curing agent diluent;
the B component comprises the following components in percentage by total weight: 10-20 wt% of modified castor oil polyalcohol, 15-25 wt% of solvent-free hydroxyl-containing polyacrylic resin, 3-5 wt% of wetting dispersant, 0.2-0.6 wt% of anti-floating color and anti-floating auxiliary agent, 25.1-35.5 wt% of pigment, 24-43 wt% of filler, 0.4-0.8 wt% of rheological auxiliary agent, 0.5-1 wt% of defoaming agent, 0.3-0.7 wt% of flatting agent, 0.1-0.3 wt% of catalyst and 1-3 wt% of matting powder;
the component C is white alundum powder;
the component D is hydroxyl-terminated polydimethylsiloxane.
The invention also provides a construction method of the polyurethane finish paint, which comprises the following steps:
(1) uniformly mixing the component A, the component B and the component D, and then uniformly mixing the component A, the component B and the component D with the component C to obtain a mixed material;
(2) and uniformly coating the mixed material on the surface of the floor coating.
The technical scheme of the invention has the following beneficial effects:
(1) the invention provides a solvent-free super wear-resistant polyurethane finish paint for a floor paint surface, which not only has the advantage of high performance of a solvent-based super wear-resistant polyurethane finish paint for the floor paint, but also has the characteristics of safety, environmental protection and no odor of a water-based super wear-resistant polyurethane finish paint for the floor paint. Meanwhile, a coating formed by the coating provided by the invention has good wear resistance. In addition, the paint also solves the problem of difficult cleaning of the finish paint for the common super wear-resistant polyurethane floor paint.
(2) The technical scheme of the invention has feasible process route, has no special requirements on equipment, and realizes mass production in common paint factories.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
One aspect of the invention provides a polyurethane finish coating for a floor paint surface, which comprises a component A, a component B, a component C and a component D;
the component A comprises the following components in percentage by weight: 60-90 wt% of aliphatic isocyanate curing agent and 10-40 wt% of aliphatic active isocyanate curing agent diluent;
the B component comprises the following components in percentage by total weight: 10-20 wt% of modified castor oil polyalcohol, 15-25 wt% of solvent-free hydroxyl-containing polyacrylic resin, 3-5 wt% of wetting dispersant, 0.2-0.6 wt% of anti-floating color and anti-floating auxiliary agent, 25.1-35.5 wt% of pigment, 24-43 wt% of filler, 0.4-0.8 wt% of rheological auxiliary agent, 0.5-1 wt% of defoaming agent, 0.3-0.7 wt% of flatting agent, 0.1-0.3 wt% of catalyst and 1-3 wt% of matting powder;
the component C is white alundum powder;
the component D is hydroxyl-terminated polydimethylsiloxane.
The polyurethane floor finish paint consists of four components of A, B, C and D. Because the four components A, B, C and D are all 100 percent of solid content, the VOC of the prepared super wear-resistant coating system is extremely low. The component A is the main film forming substance in the coating with the largest proportion, the component B is solvent-free color paste which plays the role of coloring and covering, the component C is white corundum powder with high hardness and strong cutting resistance, and the component D is polydimethylsiloxane with hydroxyl which can migrate to the surface of the paint film. In the coating system, the component A forms a polymer structure with high crosslinking density through self-crosslinking reaction and reaction with a polymer containing hydroxyl in the component B to endow the coating with excellent mechanical property and chemical resistance (wherein, in the polymer structure formed by the reaction of the component A and the component B, a polyurea structure with high crosslinking density formed by self-crosslinking is a rigid section, a polyurethane structure formed by isocyanate and a resin containing hydroxyl is a flexible section, and a large amount of hydrogen bonding exists between the flexible section and the rigid section, the polymer structure can endow the coating with exceptionally tough mechanical property and chemical resistance), the component C has larger particle size, uniform raised particles are formed on the surface of the coating, the hard and wear-resistant particles are tightly adhered in the tough polymer coating and are preferentially contacted with an object acted on the coating from outside, and the capability of the polyurethane coating to exert the viscoelastic property and consume external force to do work is greatly enhanced, thereby greatly increasing the wear and scratch resistance of the coating. The component D is used as a organosilicon polymer with hydroxyl groups, has poor compatibility with the whole coating system, can quickly migrate to the upper surface of a paint film after the coating is coated and is uniformly distributed, and then reacts with excessive isocyanate in the component A on the surface of the coating to be fixed on the surface of the coating, so that a thin organosilicon polymer coating is formed on the surface of the super-abrasion-resistant coating. The thin silicone coating can endow the coating with the characteristics of super hydrophobicity, stain resistance, easy-peeling coating surface adhesion and the like.
According to the present invention, preferably, the a component is 30 to 50 wt%, the B component is 19 to 40 wt%, the C component is 25 to 35 wt%, and the D component is 2 to 5 wt%, based on the total weight of A, B, C and D component.
According to the present invention, preferably, in the a component, the aliphatic isocyanate curing agent is Hexamethylene Diisocyanate (HDI) trimer; the aliphatic reactive isocyanate curing agent diluent is Hexamethylene Diisocyanate (HDI) dimer.
In the present invention, the Hexamethylene Diisocyanate (HDI) trimer is preferably available from Basff
HI2000 curative and/or Desmodur N3200 curative;
hexamethylene Diisocyanate (HDI) dimer, preferably from Pasteur
HA3000 curing agent and/or
HA 2000 curing agent.
According to the invention, preferably, in the B component, the modified castor oil polyol is basf
750、
1102 and
760.
According to the present invention, preferably, in the component B, the solvent-free hydroxyl group-containing polyacrylic resin is basf
963。
According to the invention, in the component B, the wetting dispersant is polyester with a highly branched structure;
the anti-flooding and anti-floating auxiliary agent is a mixture of unsaturated polycarboxylic acid polymer with the number average molecular weight of less than 10000 and polysiloxane copolymer;
the rheological additive is polyamide wax powder; the defoaming agent is an organic silicon defoaming agent; the leveling agent is an organic silicon leveling agent; the catalyst is an organic tin catalyst; the matting powder is amorphous silicon dioxide aerosol.
In the present invention, the rheological aid is preferably polyamide wax of the american hammes THIXATROL PLUS and/or polyamide wax of the french cripple CRAYVALLAC SUPER.
The silicone-based antifoaming agent of the present invention is preferably a polysiloxane containing hydrophobic particles; preferably at least one defoamer available from hamming steud 6800, germany degao TegoAirex 900 and germany bike BYK-1796.
The organic silicon leveling agent is preferably polyether modified polydimethylsiloxane; preferably at least one from ByK-306, BYK-333, Germany and Digao TegoGlide B1484.
The matting agent is preferably at least one of German winning creative mix matting ACEMATT TS100, German winning creative mix matting OK420 and OK 500.
According to the invention, preferably, the wetting dispersant is at least one of BYK-2152, BYK-2155 and BYK-110 in Pico chemistry;
the anti-floating color and anti-floating color flowering auxiliary agent is at least one of BYK-P104, BYK-P104S and BYK-220S of Pico chemistry;
the catalyst is dibutyltin dilaurate.
In the present invention, the catalyst is preferably purchased from Woods DBTDL-T12 and/or organotin catalyst T-12 of New classical chemistry (Shanghai) Co.
According to the invention, preferably, in the component B, the pigment is titanium dioxide and/or phthalocyanine blue powder;
the filler is precipitated barium sulfate and/or talcum powder.
In the invention, the titanium dioxide is rutile titanium dioxide, preferably at least one of Sichuan python titanium dioxide R996, DuPont titanium dioxide R706 and Japanese orthostonite titanium dioxide R930.
In the present invention, the phthalocyanine blue powder is beta-crystal type copper phthalocyanine, and is preferably at least one selected from Japanese Diese DIC pigment 249-9812 phthalocyanine blue, Shanghai Tegaku chemical 4325 phthalocyanine blue B and Pasteur organic pigment Haizhu crystal blue K7096.
In the invention, the average grain size of the precipitated barium sulfate is 1250 meshes, and the precipitated barium sulfate is purchased from 1250 meshes of Shanghai Liangjiang titanium white chemical products Co., Ltd and/or 1250 meshes of Nanfeng chemical group;
the average particle size of the talc powder is preferably 1250 meshes and/or 800 meshes, and is preferably obtained from CMS-444 talc powder in Heshan chemical industry.
According to the present invention, preferably, the white alundum powder is at least one of 200 mesh white alundum powder, 150 mesh white alundum powder and 100 mesh white alundum powder.
In the invention, the component C is white corundum powder, the Mohs hardness of the white corundum powder is 9, the white corundum powder is second to diamond, after the white corundum powder and the diamond are mixed to form a paint film, the white corundum powder wrapped by the paint film can form uniform bulges on the surface of the paint film, and the bulges have two functions in the application scene of the coating: firstly, the contact area of the paint film and foreign objects is reduced; and the polyurethane coating is used as an abnormally hard 'sea-island structure' in the polyurethane coating. The contact area between the paint film and the foreign objects is reduced, and the damage to the paint film can be reduced to a certain extent. The exceptionally hard "sea-island" structure formed by the white corundum powder in the coating is the main reason for the super-wear resistance of the coating. As previously mentioned, the reason for the better abrasion resistance of polyurethane coatings is that they have a "viscoelastic" polymer structure to dissipate the work done by the foreign object. The addition of the hard white corundum powder with large particle size into the polyurethane coating layer is to greatly improve the capability of the polyurethane structure to do work by consuming external force. Hard white corundum powder is wrapped in the polyurethane polymer to form a bulge. When the external force is applied, the rigid bulges can integrally move towards the force-applying direction. The movement of the protrusions will cause the polyurethane coating with "viscoelastic" characteristics of the attached surface to move. Therefore, one point of the bulge is stressed to drive all the polyurethane coatings on the surface of the bulge to be stressed, so that the capability of the coatings for consuming external force to do work on the coatings is greatly improved. Based on the technical principle, the polyurethane coating with viscoelasticity can realize the characteristic of super wear resistance.
In the invention, the polyurethane super-wear-resistant coating forms an uneven rough surface due to the addition of the white corundum powder. If some dirt is adhered, the surface of the coating is difficult to clean. This is also the maximum pain point for a superior performance ultra-abrasion resistant polyurethane coating. To solve this problem, the present invention adds component D to the coating. And the component D is dimethyl polysiloxane resin with hydroxyl. When the components of the coating are mixed and coated, the component D floats to the surface of the coating due to incompatibility in the system and low specific gravity and reacts with excessive isocyanate on the surface to be fixed on the surface of the coating. Therefore, after the paint film is dried, the component D forms a polydimethylsiloxane coating on the surface of the coating. The polydimethylsiloxane coating layer endows scrawling resistance, excellent water and oil repellency and strippable effect.
In the present invention, the 150 mesh white alundum powder is preferably purchased from 150 mesh white alundum powder of Zhengzhou Xinli wear-resistant materials Co., Ltd and/or 150 mesh white alundum powder of Zhengzhou Hongchuan abrasives Co., Ltd.
The 200-mesh white alundum powder is preferably purchased from 200-mesh white alundum powder of Zhengzhou Xinli wear-resistant material Co., Ltd and/or 200-mesh white alundum powder of Zhengzhou Hongchua abrasive Co., Ltd.
In the present invention, the hydroxyl-terminated polysiloxane of component D is preferably available from Digao Tego 5000N, Germany and/or HR 5001 from aviation chemical industry.
The invention also provides a construction method of the polyurethane finish paint, which is characterized by comprising the following steps:
(1) uniformly mixing the component A, the component B and the component D, and then uniformly mixing the component A, the component B and the component D with the component C to obtain a mixed material;
(2) and uniformly coating the mixed material on the surface of the floor coating.
The invention is further illustrated by the following examples:
the solvent-free hydroxyl-containing polyacrylic resins used in the following examples were obtained from Pasteur
963, the anti-flooding and anti-floating auxiliary agent is a mixture of unsaturated polycarboxylic acid polymer with the number average molecular weight of less than 10000 and polysiloxane copolymer, and is specifically purchased from the company of Shang, the catalyst is dibutyltin dilaurate and is purchased from organic tin catalyst T-12 of New Seisan chemical company Limited, 800-mesh talcum powder is purchased from Heshan chemical CMS-444, 1250-mesh precipitated barium sulfate is purchased from Shanghai Liangjiang titanium chemical products Limited, the phthalocyanine blue powder is β -crystal copper phthalocyanine and is purchased from Japanese Dian Aisheng pigment 249-9812 phthalocyanine blue, the titanium dioxide is rutile titanium dioxide and is specifically purchased from the company of Shanghai, the DIC powder is purchased from the company of EXAMPL, and the 200-mesh white corundum powder, the 150-mesh white corundum powder and the 100-mesh white corundum powder are purchased from Zhengli New materials Limited;
the construction method of the polyurethane finish paint for the floor paint surface prepared by the following embodiments comprises the following steps: (1) and pouring A, B and the component D into a clean barrel, setting the rotating speed of a stirring gun to be 300 r/min, stirring for 3 min, uniformly mixing, adding the component C into the mixed liquid of A, B and the component D, setting the rotating speed of the stirring gun to be 300 r/min, and stirring for 3 min. (2) And pouring the A, B, C and D mixed liquid material on the surface of the epoxy floor coating, uniformly scraping the liquid material by a flat-opening steamed bread knife for the epoxy floor with the length of 30cm against the surface of the epoxy floor coating, and uniformly rolling and coating the liquid material by a 10-inch polyurethane sponge roller according to the shape of a well.
Example 1
The embodiment provides a polyurethane finish paint for a floor paint surface, which comprises a component A, a component B, a component C and a component D; wherein the mass ratio of the component A to the component B to the component C to the component D is 5:2:3: 0.3;
the component A comprises the following components in percentage by weight: aliphatic isocyanate curing agent (hexamethylene diisocyanate (HDI) trimer, of Basff
HI 2000) 90% by weight and an aliphatically active isocyanate curing agent diluent (hexamethylene diisocyanate (HDI) dimer, of Basff
HA 3000)10wt％；
The preparation method comprises the following steps: pouring an aliphatic isocyanate curing agent and an aliphatic active isocyanate curing agent diluent into a reaction kettle, setting the rotating speed to be 400 rpm, and mixing and stirring for 20 minutes to obtain the component A;
the B component comprises the following components in percentage by weight: 15 wt% of modified castor oil polyol (Sovermol-760 of Basff), 15 wt% of solvent-free hydroxyl-containing polyacrylic resin, 4 wt% of wetting dispersant (polyester with a highly branched structure, ByK-2152), 0.4 wt% of anti-flooding and anti-floating assistant (ByKP 104S), 32.9 wt% of titanium dioxide (titanium dioxide R996 of Tetrapython python), 0.1 wt% of phthalocyanine blue powder, 1250 mesh precipitated barium sulfate 18 wt%, 800 mesh talc 12 wt%, rheology aid (polyamide wax powder, american hamming modesty THIXATROL PLUS)0.5 wt%, defoamer (silicone defoamer, american hamming modesty 6800)0.5 wt%, leveling agent (silicone leveling agent, bib chemical BYK-306)0.5 wt%, catalyst (organotin catalyst) 0.1 wt%, and matting powder (amorphous silica aerosol, german winning moral testudinate ACEMATT TS100)1 wt%;
the preparation method comprises the following steps: (1) pouring the modified castor oil polyol, the solvent-free hydroxyl-containing polyacrylic resin, the wetting dispersant and the anti-flooding and anti-floating auxiliary agent into a reaction kettle, setting the rotating speed to be 300 revolutions per minute, and mixing and stirring for 10 minutes; (2) adding titanium dioxide, phthalocyanine blue powder, 1250-mesh precipitated barium sulfate and 800-mesh talcum powder under stirring, setting the rotating speed at 500 revolutions per minute, and stirring for 30 minutes. Then transferring the mixture to a blue-tooth sand mill, and grinding the mixture until the fineness is less than 40 micrometers; (3) transferring the mixture to a dispersing device, setting the rotating speed to be 500 r/min, adding matting powder, rheological additive, defoaming agent, flatting agent and catalyst, and stirring for 30 min to obtain the component B.
The component C is 200 meshes of white alundum powder; and the component D is hydroxyl-terminated polydimethylsiloxane (German Digao Tego 5000N).
Example 2
The embodiment provides a polyurethane finish paint for a floor paint surface, which comprises a component A, a component B, a component C and a component D; wherein the mass ratio of the component A to the component B to the component C to the component D is 5:2:3: 0.4;
the component A comprises the following components in percentage by weight: aliphatic isocyanate curing agent (hexamethylene diisocyanate (HDI) trimer, of Basff
HI 2000) 70% by weight and an aliphatically active isocyanate curing agent diluent (hexamethylene diisocyanate (HDI) dimer, of Basff
HA 3000)30wt％；
The specific preparation of component A is the same as in example 1.
The B component comprises the following components in percentage by weight: 10 wt% of modified castor oil polyol (Sovermol-750 of Basff), 25 wt% of solvent-free hydroxyl-containing polyacrylic resin, 3 wt% of wetting dispersant (polyester with a highly branched structure, ByK-2152), 0.3 wt% of anti-flooding and anti-floating assistant (ByKP 104S), 28.5 wt% of titanium dioxide (titanium dioxide R996 of Tetrapython python), 0.2 wt% of phthalocyanine blue powder, 1250 mesh precipitated barium sulfate 15 wt%, 800 mesh talc 14.4 wt%, rheology aid (polyamide wax powder, american hamming modesty THIXATROL PLUS)0.7 wt%, defoamer (silicone defoamer, american hamming modesty 6800)0.6 wt%, leveling agent (silicone leveling agent, bib chemical BYK-306)0.6 wt%, catalyst (organotin catalyst) 0.2 wt%, and matting powder (amorphous silica aerosol, german winning defatting degauss matting powder ACEMATT TS100)1.5 wt%;
the specific preparation of component B was the same as in example 1.
The component C is 150-mesh white alundum powder; the component D is hydroxyl-terminated polydimethylsiloxane (HR 5001 in aviation chemical industry).
Example 3
The embodiment provides a polyurethane finish paint for a floor paint surface, which comprises a component A, a component B, a component C and a component D; wherein the mass ratio of the component A to the component B to the component C to the component D is 5:2:3: 0.5;
the component A comprises the following components in percentage by weight: aliphatic isocyanate curing agent (hexamethylene diisocyanate (HDI) trimer, of Basff
HI 2000) 80% by weight and an aliphatically active isocyanate curing agent diluent (hexamethylene diisocyanate (HDI) dimer, of Basff
HA 3000)20wt％；
The specific preparation of component A is the same as in example 1.
The B component comprises the following components in percentage by weight: 10 wt% of modified castor oil polyol (Sovermol-750 by basf), 15 wt% of solvent-free hydroxyl-containing polyacrylic resin, 5 wt% of wetting dispersant (polyester with a highly branched structure, ByK-2152 by Pico chemistry), 0.5 wt% of anti-flooding and anti-floating auxiliary agent (ByKP 104S by Pico chemistry), 33 wt% of titanium dioxide (titanium dioxide R996 by Tetrakis python), 0.2 wt% of phthalocyanine blue powder, 22 wt% of 1250-mesh precipitated barium sulfate, 10 wt% of 800-mesh talcum powder, 0.6 wt% of rheological auxiliary agent (polyamide wax powder, Thixatrol PLUS), 0.7 wt% of defoaming agent (silicone defoaming agent, Hamming modernia, Skyo 6800), 0.7 wt% of leveling agent (silicone-based leveling agent, Pico chemistry ByK-306), 0.3 wt% of catalyst (catalyst) and 2 wt% of matting powder (amorphous silica aerosol, German Matusamiq ACEMATTTS 100);
the specific preparation of component B was the same as in example 1.
The component C is 100-mesh white alundum powder; and the component D is hydroxyl-terminated polydimethylsiloxane (German Digao Tego 5000N).
Test example
The coatings prepared in examples 1 to 3 were prepared into coatings according to the above-mentioned construction processes, and the coatings were cured at 25 ℃ and 60% humidity for 7 days and then tested, and the specific test results are shown in table 1. Wherein the test items in table 1 are tested according to the standard specification of the standard GB/T22374-2018 floor coating, except for superhydrophobicity, graffiti resistance and blocking resistance. The superhydrophobicity is tested using a contact angle meter. The scrawling resistance test method is to write on the surface of the super wear-resistant coating by using a morning gloss oil-based marking pen, and after 1 hour, see whether the writing can be wiped off by using cotton cloth. The adhesion resistance test method comprises the steps of respectively dropping the mixed two-component epoxy floor paint and two-component solvent type polyurethane floor paint on the surfaces of the super wear-resistant coatings of the embodiments 1-3 at the room temperature of 25 ℃, waiting for 48 hours, and judging whether the epoxy floor paint film and the polyurethane floor paint film can be easily peeled off from the super wear-resistant coatings; the two-component epoxy floor paint is a dual-component epoxy self-leveling finish paint of CP4630 of Deeiwei company, and the two-component solvent type polyurethane floor paint is a dual-component solvent type polyurethane finish paint of CP4243 of Deeiwei company.
TABLE 1
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A polyurethane finish paint for floor paint surface is characterized in that the polyurethane finish paint comprises a component A, a component B, a component C and a component D;
the component A comprises the following components in percentage by weight: 60-90 wt% of aliphatic isocyanate curing agent and 10-40 wt% of aliphatic active isocyanate curing agent diluent;
the B component comprises the following components in percentage by total weight: 10-20 wt% of modified castor oil polyalcohol, 15-25 wt% of solvent-free hydroxyl-containing polyacrylic resin, 3-5 wt% of wetting dispersant, 0.2-0.6 wt% of anti-floating color and anti-floating auxiliary agent, 25.1-35.5 wt% of pigment, 24-43 wt% of filler, 0.4-0.8 wt% of rheological auxiliary agent, 0.5-1 wt% of defoaming agent, 0.3-0.7 wt% of flatting agent, 0.1-0.3 wt% of catalyst and 1-3 wt% of matting powder;
the component C is white alundum powder;
the component D is hydroxyl-terminated polydimethylsiloxane.
2. The polyurethane topcoat coating of claim 1, wherein the a component is 30-50 wt%, the B component is 19-40 wt%, the C component is 25-35 wt%, and the D component is 2-5 wt%, based on the total weight of A, B, C and D components.
3. The polyurethane topcoat coating of claim 1, wherein in the a component, the aliphatic isocyanate curing agent is hexamethylene diisocyanate trimer; the aliphatic reactive isocyanate curing agent diluent is hexamethylene diisocyanate dimer.
4. The polyurethane topcoat coating of claim 1, wherein in the B component, the modified castor oil polyol is basf' s
750、
1102 and
760.
5. The polyurethane topcoat coating of claim 1, wherein in the B component, the solventless hydroxyl group-containing polyacrylic resin is basf' s
963。
6. The polyurethane topcoat coating of claim 1, wherein in the component B, the wetting dispersant is a polyester with a highly branched structure;
the anti-flooding and anti-floating auxiliary agent is a mixture of unsaturated polycarboxylic acid polymer with the number average molecular weight of less than 10000 and polysiloxane copolymer;
the rheological additive is polyamide wax powder; the defoaming agent is an organic silicon defoaming agent; the leveling agent is an organic silicon leveling agent; the catalyst is an organic tin catalyst; the matting powder is amorphous silicon dioxide aerosol.
7. The polyurethane topcoat coating of claim 6, wherein the wetting dispersant is at least one of BYK-2152, BYK-2155, and BYK-110;
the anti-floating color and anti-floating color auxiliary agent is at least one of BYK-P104, BYK-P104S and BYK-220S;
the catalyst is dibutyltin dilaurate.
8. The polyurethane finish coating according to claim 1, wherein in the component B, the pigment is titanium dioxide and/or phthalocyanine blue powder;
the filler is precipitated barium sulfate and/or talcum powder.
9. The polyurethane topcoat coating of claim 1, wherein the white corundum powder is at least one of 200-mesh white corundum powder, 150-mesh white corundum powder and 100-mesh white corundum powder.
10. The method of applying the polyurethane topcoat coating of any one of claims 1-9, comprising:
(1) uniformly mixing the component A, the component B and the component D, and then uniformly mixing the component A, the component B and the component D with the component C to obtain a mixed material;
(2) and uniformly coating the mixed material on the surface of the floor coating.
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| CN116694212A (en) * | 2023-06-02 | 2023-09-05 | 万华节能科技(烟台)有限公司 | Super wear-resistant polyurethane floor coating suitable for low-temperature environment |
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