CN101153155A - Priming coating composition and preparation method thereof - Google Patents
Priming coating composition and preparation method thereof Download PDFInfo
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- CN101153155A CN101153155A CNA2006101410422A CN200610141042A CN101153155A CN 101153155 A CN101153155 A CN 101153155A CN A2006101410422 A CNA2006101410422 A CN A2006101410422A CN 200610141042 A CN200610141042 A CN 200610141042A CN 101153155 A CN101153155 A CN 101153155A
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Abstract
The present invention discloses a priming dope compound; the compound comprises hot plastic acryl resin, palette and solvent; wherein, the compound also comprises an assistant film component; the assistant film component can be divided into hydroxyl polymer resin, and or chloroacetic resin. The hydroxyl polymer resin can be selected one or more than one among hydroxyl acrylic acid resin, hydroxyl polyester resin, hydroxyl polyether resin, hydroxyl alkyd or epoxide resin. The priming dope compound has the advantages of much better coating performance, much better adhesion performance between different lacquer levels when making multi-painting; in addition, the rigidity of the lacquer level after being solidified is much higher.
Description
Technical field
The present invention relates to a kind of primer coating compositions and preparation method thereof.
Background technology
At present, the surface of some products generally comprises prime coat and top coat layer as the enamelled coating on the surface of plastic component product, and these plastic component for example can be mobile phone shell, cell phone keyboard, laptop computer, cosmetics containers etc.Prime coat is generally formed by thermoplastic acrylic coating, and top coat layer is generally formed by ultraviolet-curing paint or two component polyurethane acrylate paint.In this system, prime coat mainly provides the decorative colors of accessory, and top coat layer then provides the surface protection to prime coat and whole accessory.Prime coat generally applies one deck and gets final product, but sometimes for to reach special color effects or function, it also can be made up of multilayer.
The primer base that is used for the spraying of plastic component surface generally contains matrix resin, pigment and solvent, can also contain cellulose acetate butyrate (CAB) or Nitrocellulose (NC) and/or auxiliary agent.Described matrix resin is a thermoplastic acrylic resin.Described pigment is selected from pearlescence, pearl powder or the aluminium-silver slurry of metalluster is provided.Described auxiliary agent can be one or more in flow agent, anti-settling agent, the wetting dispersing agent.The preparation method of this primer base generally comprises matrix resin, cellulose acetate butyrate (CAB) or Nitrocellulose (NC) and auxiliary agent and solvent, adds pigment then and mixes.When this coating only sprays one deck, itself and following ground or with the sticking power of top finish paint (being mainly ultraviolet light polymerization lacquer (UV lacquer) or polyurethane paint (PU lacquer)) still can, and the hardness of whole enamelled coating also can reach requirement usually.But when priming paint was made up of the multi-layer thermoplastic acrylic resin, the sticking power between its prime coat and the layer was often not enough, and particularly wherein one deck is that it is especially outstanding that the phenomenon of ply adhesion variation becomes when containing the layer of aluminium-silver slurry.
For the not enough problem of sticking power, general terms of settlement is to add adhesion promoter in priming paint, but because common adhesion promoter has higher acid number usually, in general plain color lacquer, add adhesion promoter and still do not have big problem, can make its color and luster deepening but in silver color priming paint, add adhesion promoter, can not use in the occasion that needs high brightness silver color priming paint.
Because the primer base resin mostly adopts thermoplastic acrylic resin as matrix resin, this resin is after being heating and curing, the enamelled coating pencil hardness test is under 1000 gram force effects, its hardness is often less than 1H, but behind its cover UV finish paint or PU finish paint, because of thermoplastic acrylic resin is the crosslinking curing resin, and cross-linking density is bigger, and therefore the hardness of whole enamelled coating (comprising top coat layer and prime coat) can reach 2H.But when priming paint was mutliplayered coats of enamel, the hardness of prime coat reduced rapidly along with the increase of the number of plies, caused the reduction of whole enamelled coating hardness and did not reach test request.
Summary of the invention
The objective of the invention is to overcome the existing lower shortcoming of primer base sticking power, higher primer base of a kind of sticking power and preparation method thereof is provided.
Primer coating compositions provided by the invention, said composition contains thermoplastic acrylic resin, pigment and solvent, wherein, described composition also contains auxiliary film-forming components, described auxiliary film-forming components is hydroxyl polymeric resin and/or vinyl chloride-vinyl acetate resin, and described hydroxyl polymeric resin is selected from one or more in Hydroxylated acrylic resin, hydroxy polyester resin, hydroxy polyethers resin, hydroxyl alkyd resins or the Resins, epoxy.
The preparation method of coating provided by the invention comprises: thermoplastic acrylic resin and solvent is even, add pigment then, stir, wherein, this method also comprises auxiliary film-forming components added in the mixture of described thermoplastic acrylic resin and solvent and mixes, described auxiliary film-forming components is hydroxyl polymeric resin and/or vinyl chloride-vinyl acetate resin, and described hydroxyl polymeric resin is selected from one or more in Hydroxylated acrylic resin, hydroxy polyester resin, hydroxy polyethers resin, hydroxyl alkyd resins or the Resins, epoxy.
Because the present invention adopts the thermoplastic acrylic resin of high glass transition temperature and auxiliary film forming matter hydroxyl polymeric resin and/or the vinyl chloride-vinyl acetate resin of promoting as sticking power, thereby has significantly improved the sticking power between sticking power, prime coat and the top coat layer between the prime coat.When composition provided by the invention also contains isocyanic ester and/or hardness reinforcer, perhaps simultaneously or to adopt second-order transition temperature (Tg) separately be that high glass transition temperature thermoplastic acrylic resin more than 80 ℃ is during as matrix resin, can also improve the hardness of prime coat, can not influence simultaneously color and luster and the brightness of using silver color priming paint, and improve workability.The surface that coating composition of the present invention can be coated on various products forms prime coat, and the surface that particularly is coated in plastic prod forms prime coat.
Embodiment
According to multilayer primer base provided by the invention, be benchmark with the total amount of coating, the content of described thermoplastic acrylic resin is 10-80 weight %, is preferably 20-60 weight %; The content of hydroxyl polymeric resin and/or vinyl chloride-vinyl acetate resin is 4.0-30 weight %, is preferably 5.0-20 weight %; The content of pigment is 5-40 weight %, is preferably 10-30 weight %; The content of solvent is 5-60 weight %, is preferably 10-50 weight %.
According to the present invention, can adopt various known thermoplastic acrylic resins as matrix resin.Under the preferable case, adopting second-order transition temperature (Tg) is more than 80 ℃, preferred 80-120 ℃ high glass transition temperature thermoplastic acrylic resin is as matrix resin, described second-order transition temperature (Tg) is the high glass transition temperature thermoplastic acrylic resin more than 80 ℃, as adopting U.S. Rhom and Hass product A-21 resin, its second-order transition temperature is 105 ℃, perhaps adopts Di Aisheng (DIC) HSA4300 resin, and its second-order transition temperature is 90 ℃.Compare with the cold coating that adopts low Tg, employing second-order transition temperature (Tg) is the hardness after the high glass transition temperature thermoplastic acrylic resin more than 80 ℃ can improve the coating film forming, but its shrinking percentage can be big usually when film forming for the resin of high glass transition temperature, thereby may cause the decline of ply adhesion.As film forming material, when prime coat surpasses two-layerly when above, the ply adhesion that then is easy to cause solidifying back enamelled coating is not enough as the above resin of independent employing.
Therefore, in technical scheme of the present invention, hydroxyl polymeric resin and/or vinyl chloride-vinyl acetate resin are added in the matrix resin as auxiliary film forming matter, play enhancing and solidify the hardness of back enamelled coating and the effect of ply adhesion.
Described hydroxyl polymeric resin is selected from one or more of Hydroxylated acrylic resin, hydroxy polyester resin, hydroxy polyethers resin, hydroxyl alkyd resins, Resins, epoxy.Under the preferable case, the number-average molecular weight of described hydroxyl polymeric resin is 10,000-50, and 000, hydroxyl value is 40-150mg KOH/g, preferred 40-80mgKOH/g, resulting enamelled coating in this molecular weight and hydroxyl value scope, its sticking power and hardness all can strengthen.
When described auxiliary film forming matter was the hydroxyl polymeric resin, coating composition provided by the invention also preferably contained and accounts for coating composition gross weight 0-8 weight %, the isocyanic ester of preferred 0.1-5 weight %.Add isocyanic ester and hydroxy polymer resin solidification, then isocyanate curing agent can be separately as a kind of component, it is similar to common bicomponent polyurethane paint, thereby form reticulated structure behind hydroxyl polymeric resin and the polyisocyanate curing agent crosslinking curing in this primer coating compositions, it plays original thermoplastic acrylic resin and fills and bridging action.Therefore, its hardness can increase significantly, and the strong polarity ammonia ester bond that crosslinked back forms also is very helpful to ply adhesion.For simplicity, under the preferable case, isocyanic ester adds to when coating uses in the thinner of priming paint in advance, joins in the coating composition provided by the invention with thinner.
Described isocyanic ester can be selected from any isocyanic ester that can play solidification to the hydroxyl polymeric resin, as aliphatics or alicyclic isocyanate monomer, aliphatics or alicyclic isocyanate tripolymer or aliphatics or alicyclic isocyanate prepolymer one or more, be preferably the aliphatic isocyanates tripolymer.Adopt the aliphatic isocyanates tripolymer can prevent that also enamelled coating from solidifying back enamelled coating yellowing.Such trimerical example comprises isophorone diisocyanate (IPDI) tripolymer, dicyclohexyl methane diisocyanate (HMDI) tripolymer, hexamethylene diisocyanate (HDI) tripolymer, hexahydrotoluene vulcabond (HTDI) etc.This kind isocyanate can be commercially available, and as lid Si Tafu (galstaff), Asahi Chemical Industry (Asahikasei), Bayer (Bayer), the product that Luo Diya companies such as (Rhodia) produces also can adopt known method to prepare.
Described vinyl chloride-vinyl acetate resin is a thermoplastic resin, and it does not need to carry out with solidifying agent crosslinked, and acid number is lower, therefore can the brightness of silver slurry in the priming paint not exerted an influence.Described vinyl chloride-vinyl acetate resin can be selected from one or more in vinylchlorid-vinyl-acetic ester, vinylchlorid-vinyl acetate-hydroxy acrylate, vinylchlorid-vinyl acetate-maleic acid ester or vinylchlorid-vinyl acetate-ethene alcohol ester.In the preferred vinyl chloride-vinyl acetate resin, content of vinylchloride is that the 70-95 weight % of vinyl chloride-vinyl acetate resin total amount, 1-25 weight %, vinyl alcohol or the hydroxyl acrylic content that vinyl acetate content is the vinyl chloride-vinyl acetate resin total amount are the 0-13 weight % of vinyl chloride-vinyl acetate resin total amount, the 0-5 weight % that toxilic acid content is the vinyl chloride-vinyl acetate resin total amount, and number-average molecular weight is 13000-42000.Utilize the strong viscosity of vinylchlorid ester high tenacity and vinyl-acetic ester, can when improving prime coat sticking power, improve the hardness of prime coat.
In the optimal way of coating composition of the present invention, also contain hardness reinforcer, this hardness reinforcer can adopt aluminum oxide powder, ultrafine silica powder, silica powder, ceramics powder, silicate powder, polymethylmethacrylate (PMMA) powder etc.The kind of its powder, particle diameter and addition etc. are all influential to the hardness and the ply adhesion of enamelled coating, be preferably greater than the hardness of enamelled coating behind the former solidifying priming paint as the hardness of the powder body material of hardness additive, the scope of its Mohs' hardness generally should be at 3-10Mohs, and the high more effect of the hardness of powder is good more.The particle diameter of powder also is an important factor that influences hardness and sticking power, concrete particle size range should be decided according to the thickness and the apparent requirement of enamelled coating, generally speaking, relatively Shi Yi particle size range is, less than the prime coat thickness 3-5 micron after the oven dry, for the prime coat on present common plastics accessory surface, the particle size range that hardness reinforcer is suitable is preferably the 2-8 micron.
The addition of described hardness reinforcer is the 0.1-8.0 weight % of coating gross weight, is preferably 0.2-5.0 weight %.
Under the preferable case, coating composition provided by the invention also contains cellulose acetate butyrate (CAB) or Nitrocellulose (NC), this cellulose acetate butyrate (CAB) or Nitrocellulose (NC) can make pigment, particularly silver powder is arranged evenly, make prime coat have the flash of light degree, and increase flow leveling, improve workability, its addition is the 0-10 weight % of coating gross weight, preferred 1-5 weight %.Cellulose acetate butyrate (CAB) can adopt U.S. Yi Siman (EASTMAN) company product, as: CAB-381 series, CAB-551 series etc.Nitrocellulose (NC) can adopt 1/4 second, 1/8 second product such as series of the platform nitre nitro-cotton product H of company type.Maybe can adopt the north, Sichuan nitro-cotton company like product.
Described pigment can be various pigment, as being the pigment of using always in the primer base of routine, for example can be selected from silver slurry, pearlescence.
Described solvent types is conventionally known to one of skill in the art.For example, described solvent can be selected from one or more in toluene, ethyl acetate, butylacetate, isobutyl acetate, propyl acetate, ethanol, propyl carbinol, pimelinketone, dimethylbenzene, hexone, acetone, methylethylketone, butyl glycol ether, the propylene glycol butyl ether.
According to coating composition provided by the invention, can also and preferably contain auxiliary agent, described auxiliary agent comprises one or more in flow agent, anti-settling agent, the wetting dispersing agent.The content of the auxiliary agent that is added is the 0-5 weight % of coating composition gross weight, and the kind of these auxiliary agents and effect have been conventionally known to one of skill in the art.
Described flow agent can be selected from EFKA3883, EFKA3886, EFKA3600, EFKA3777, BYK366, BYK333, among BYK307, the DEGO 410 one or more.Wherein EFKA series is Dutch Ai Fuka company product, and BYK series is BYK company product, and DEGO 410 series are German Di Gao company products, and the above trade mark is conventionally known to one of skill in the art.The effect of described anti-settling agent in coating composition is to form powerful network structure, make system have excellent thixotropic property, can effectively prevent the sedimentation and the knot lump of the color stuffing in the coating, can select the modest 201P of Taiwan moral, 229 for use, the DS6500/6800-20X of U.S. TAVY, DS5000-10X, 6900-20X, 4200-10 etc. that the Japan nanmu originally changes into, the above trade mark is conventionally known to one of skill in the art.Described wetting dispersing agent is to have concurrently wetting and auxiliary agent dissemination, be meant any material that can improve the dispersion state of described aluminium-silver slurry in described resin solution, as the unsaturated polycarboxylic acid polymkeric substance of lower molecular weight, polymer unsaturated polyester carboxylic acid, complicated sulfonamide derivatives, electric neutrality poly carboxylic acid amine salt, modified high-molecular acrylate, Yelkin TTS etc.Specifically can select Kerper-602, Kerper-605, Kerper630, CFC-500HP, CFC-510, CFC-637, one or more among the CFC-604S for use.Wherein Kerper series is U.S. Kerper company product, and CFC series is French CFC company product.The above trade mark is conventionally known to one of skill in the art.
The preparation method of multilayer primer base of the present invention, this method comprises: thermoplastic acrylic resin and solvent is even, add pigment then, stir, wherein, this method also is included in and adds auxiliary film-forming components in the mixture of described thermoplastic acrylic resin and solvent and mix, described auxiliary film-forming components is hydroxyl polymeric resin and/or vinyl chloride-vinyl acetate resin, and described hydroxyl polymeric resin is selected from one or more in Hydroxylated acrylic resin, hydroxy polyester resin, hydroxy polyethers resin, hydroxyl alkyd resins or the Resins, epoxy.
The preparation method of coating composition according to the present invention, the add-on of thermoplastic acrylic resin, solvent, pigment and auxiliary film-forming components makes in the coating composition that obtains and contains, gross weight with coating composition is a benchmark, the thermoplastic acrylic resin of 20-60 weight %, 5.0-20 the auxiliary film-forming components of weight %, the solvent of the pigment of 10-30 weight % and 10-50 weight %.
In the preparation method's of coating composition of the present invention optimal way, described film-forming components is the hydroxyl polymeric resin, this method also comprises isocyanic ester is added in the described coating composition that makes, the add-on of described isocyanic ester makes in the coating composition that obtains and contains, gross weight with coating composition is a benchmark, the isocyanic ester of 0.1-5 weight %.In the preparation process of reality, also can more preferably isocyanic ester be joined the thinner that is used for coating in advance and mix the formation mixed diluent.
In the preparation method's of coating composition of the present invention optimal way, this method also is included in and adds cellulose acetate butyrate and/or Nitrocellulose in the mixture of described auxiliary film-forming components, thermoplastic acrylic resin and solvent and mix, the add-on of described cellulose acetate butyrate and/or Nitrocellulose is to make in the coating composition that obtains to contain, gross weight with coating composition is a benchmark, 1-5 weight % cellulose acetate butyrate and/or Nitrocellulose.
In the preparation method's of coating composition of the present invention optimal way, this method also comprises and will add hardness reinforcer and mix in the mixture of described auxiliary film-forming components, described thermoplastic acrylic resin and solvent, the add-on of described hardness reinforcer makes in the coating composition that obtains and contains, gross weight with coating composition is a benchmark, 0.1-8 the hardness reinforcer of weight %, described hardness reinforcer is selected from aluminum oxide powder, one or more in ultrafine silica powder, silica powder, ceramics powder, silicate powder, the polymethylmethacrylate powder.
The mixed diluent that primer base that aforesaid method obtains and isocyanic ester and thinner are pre-mixed is by 1: the dilution proportion of 0.8-1.2, perhaps directly with primer base and isocyanic ester and mixing diluents, be sprayed at the surface of product, on the plastic plate surface, solidified 5-30 minute down at 40-80 ℃.
Repeat spraying and oven dry, can obtain thick is the prime coat of the multilayer priming paint of 5-15 micron.After spraying the ultraviolet light polymerization finish paint again on the prime coat, through ultraviolet light polymerization or be heating and curing and promptly obtain the complete thick combination enamelled coating of 20-24 micron that is.
The following examples illustrate multilayer primer base provided by the invention and preparation method thereof.
Embodiment 1
With thermoplastic acrylic resin (model A-21, second-order transition temperature is 105 ℃, U.S. Rhom and Hass product) 30 the gram, (TIRES 4702 for hydroxyl acrylic resin, the NUPLEX product) 10 grams, CAB resin (CAB-381-0.5, the Yi Siman product) 3 grams, flow agent (EFKA3777) 1.0 grams and toluene 15 grams, butylacetate 12 grams, propyl carbinol 4 restrain the mixed solvent of forming and mix, and are stirred to abundant dissolving.Add silver slurry (5660NS, Japanese Japan product) 10 grams then in above-mentioned mixing solutions, be stirred well to evenly, filtering and standing adds isocyanic ester (model N3390, Bayer product) 2 grams again, obtains coating composition X1 provided by the invention.
With the coating composition gross weight is benchmark, said composition X1 consists of, thermoplastic acrylic resin 34.5 weight %, hydroxyl acrylic resin 11.5 weight %, CAB resin 3.4 weight %, flow agent 1.1 weight %, solvent 35.6 weight %, silver slurry 11.5 weight %, isocyanic ester 2.3 weight %.
Comparative Examples 1
This Comparative Examples illustrates existing coating and preparation method thereof.
Method according to embodiment 1 prepares coating composition, and different is not add hydroxyl acrylic resin and isocyanic ester, obtains reference coating composition Z1.
Embodiment 2
With thermoplastic acrylic resin (model A-21, second-order transition temperature is 105 ℃, U.S. Rhom and Hass product) 36 grams, Resins, epoxy (trade mark is E-20 or E-12) 12 grams and toluene 8 grams, butylacetate 6 grams, mixed solvent that propyl carbinol 2 grams are formed and silver slurry (5660NS, Japan Japan product) 16 grams are made coating composition X2 of the present invention by the preparation method of embodiment 1, gross weight with coating composition is a benchmark, and said composition X2 consists of: thermoplastic acrylic resin 45 weight %, Resins, epoxy 12 weight %, solvent 20 weight %, silver slurry 20 weight %.
Embodiment 3
With thermoplastic acrylic resin's (Di Aisheng (DIC) HSA4300 resin, its second-order transition temperature is 90 ℃) 18 grams, CAB resin (CAB-381-0.5, the Yi Siman product) 1 gram, vinyl chloride-vinyl acetate resin (model SobinA series, Nishin Chemical Industry Co. Lt) 18 grams, flow agent (EFKA3777) 2 grams and toluene 20 grams, butylacetate 15 grams, mixed solvent that propyl carbinol 10 grams are formed and silver slurry (5660NS, Japan Japan product) 9 grams are made coating composition X3 of the present invention according to embodiment 1 described method, gross weight with coating composition is a benchmark, and said composition X3 consists of: thermoplastic acrylic resin 20 weight %, CAB resin 1 weight %, vinyl chloride-vinyl acetate resin 20 weight %, solvent 47 weight %, silver slurry 10 weight %.
Embodiment 4
Thermoplastic acrylic resin (model A-21, U.S. Rhom and Hass product) 50 grams, (TIRES 4702 for hydroxyl acrylic resin, the NUPLEX product) 5 grams, CAB resin (CAB-381-0.5, the Yi Siman product) 5 grams, flow agent (EFKA3777) 1 gram and toluene 4 grams, butylacetate 4 grams, mixed solvent that propyl carbinol 2 grams are formed and silver slurry (5660NS, Japan Japan product) 20 grams, aluminum oxide powder (model BK305, Germany produces) 5 grams, isocyanic ester (model N3390, the Bayer product) 4 grams are made coating composition X4 of the present invention according to embodiment 1 described method.Gross weight with coating composition is a benchmark, and said composition X4 consists of: thermoplastic acrylic resin 50 weight %, hydroxyl acrylic resin 5 weight %, CAB resin 5 weight %, solvent 10 weight %, silver slurry 20 weight %, isocyanic ester 4 weight %, aluminum oxide powder 5 weight %.
Embodiment 5-8
Method according to embodiment 1 prepares coating composition, and different is to change the slurry of the silver among the embodiment 1-4 (5660NS, Japanese Japan product) into transparent red dyestuff (BASF BASF 365,395) respectively, obtains the coating composition Y1-Y4 of embodiment 5-8.
Comparative Examples 2
Method according to embodiment 1 prepares coating composition, different is not add hydroxyl acrylic resin and isocyanic ester, and the slurry of the silver among the embodiment 1 (5660NS, Japanese Japan product) is replaced to transparent red dyestuff (BASF BASF 365,395), obtain coating composition Z2.
Embodiment 9-12
The character of the enamelled coating of coating composition formation provided by the invention is adopted in the following examples explanation.
Step 1, primer base X1 and thinner (C27095 that embodiment 1 is obtained, Japan musashi company product) by 1: 0.8 dilution proportion, be sprayed on the plastic plate after cleaning and drying, solidified 10 minutes down, obtain adhering on the surface plastic plate that thickness is 9 microns prime coats at 60 ℃.
Step 2, coating Y1 and thinner (C27095 that embodiment 5 is obtained, Japan musashi company product) by 1: 0.8 dilution proportion, be sprayed on the prime coat of the plastic plate that step 1 obtains, toasted 10 minutes down at 60 ℃, obtain being attached with on the surface plastic plate K1 of 15 micron thickness combination (undercoat that is formed by Y1 coating is 6 microns) prime coat.
Respectively according to step 1-2, the coating Y2 that primer base X2 that example 2 is obtained and example 6 obtain, the primer base X4 that coating Y3 that the primer base X3 that example 3 obtains and example 7 obtain and example 4 obtain is coated on the identical plastic plate with the coating Y4 that example 8 obtains, and obtains being attached with the plastic plate K2-K4 of 15 micron thickness combination prime coat.
Embodiment 13-16
With ultraviolet light polymerization finish paint (C-UV720KF, Japan musashi company product) with thinner (C27095, Japan musashi company product) by 1: 0.8 dilution proportion, be sprayed on the plate K1-K4 of plastic plate embodiment 9-12, with ultraviolet wavelength is that the high pressure mercury vapour lamp of 365 nanometers shines, the distance of lamp and base material is 5 centimetres, the accumulative total quantity of illumination is 1000 milli Jiao/square centimeters, and the thickness that makes the ultraviolet light polymerization finish paint is 13 microns, so just obtains being attached with the plastic plate K5-K8 of 28 microns combination enamelled coatings.
Measure respectively K1-K4 upper base enamelled coating hardness and with the sticking power of the enamelled coating that adheres to of plastic plate ground, and K5-K8 top coat layer and the sticking power of prime coat and the hardness of top coat layer, the results are shown in Table 1.
The performance test methods of enamelled coating is as follows:
Sticking power: draw 100 1 millimeter * 1 millimeter square lattice at sprayed surface with drawing the lattice device, the model of producing with Minnesota Mining and Manufacturing Company is 600 smooth being bonded on the grid of scotch tape, do not stay a space, vertically uncover with utmost dispatch then, observe cut edge and have or not depainting.Is 5B as the depainting amount at 0～5%, is 4B between 5～10%, is 3B between 10～20%, is 2B between 20～30%, is B between 30～50%, is being 0B more than 50%.
Measurement of hardness: measure according to chapter 4 regulation among the GB/T6739.Basic skills is the pencil delineation enamelled coating with certain degree of hardness, and the depth degree of range estimation paint film cut is represented hardness of paint film.Surperficial as certain with H pencil 1000 gram force cuts, and cut is arranged with 2H pencil 1000 gram forces, then certain surface hardness is 1H.Measured hardness is risen progressively successively by 3B-2B-1B-F-H-2H-3H.
Comparative Examples 3
According to embodiment 9-12 step 1 and step 2, will be coated on the identical plastic plate by coating Z1, the coating Z2 of Comparative Examples 2 that Comparative Examples 1 obtains, obtain being attached with the plastic plate KB1 of 15 microns prime coats.
Comparative Examples 4
Obtain being attached with the plastic plate KB2 of 28 microns combination enamelled coatings according to method coating ultraviolet light curing finish paint (C-UV720KF, Japan musashi company product) on KB1 of embodiment 13-16.
Adopt the method identical to measure the sticking power and the hardness of Comparative Examples 3 and 4, the results are shown in table 1 with embodiment.
Table 1
| Numbering | The coating that applies | Brassboard number | Sticking power | Hardness |
| Embodiment 9 | X1+Y1 | K1 | 5B | H-2H |
| Comparative Examples 3 | Z1+Z2 | KB1 | 2B | 1B-F |
| Embodiment 10 | X2+Y2 | K2 | 5B | 2H |
| Embodiment 11 | X3+Y3 | K3 | 5B | H-2H |
| Embodiment 12 | X4+Y4 | K4 | 5B | 3H |
| Embodiment 13 | The X1+Y1+ finish paint | K5 | 5B | H |
| Comparative Examples 4 | The Z1+Z2+ finish paint | KB2 | 1B-2B | 1B |
| Embodiment 14 | The X2+Y2+ finish paint | K6 | 5B | 2H |
| Embodiment 15 | The X3+Y3+ finish paint | K7 | 5B | H-2H |
| Embodiment 16 | The X4+Y4+ finish paint | K8 | 5B | 2H-3H |
From the table data as can be seen, the sticking power of embodiment 9-12 and hardness performance all are higher than Comparative Examples 3, the sticking power of embodiment 13-16 and hardness performance all are higher than Comparative Examples 4.Show by above-mentioned contrast, the sticking power and the hardness of the multilayer prime coat that coating composition of the present invention forms all are better than the formed multilayer prime coat of existing coating composition, and the enamelled coating on the multilayer prime coat that coating composition of the present invention forms after the finishing paint, sticking power and hardness performance still are better than the multilayer finishing paint enamelled coating afterwards that existing coating forms.
Claims (17)
1. primer coating compositions, said composition contains thermoplastic acrylic resin, pigment and solvent, it is characterized in that, described composition also contains auxiliary film-forming components, described auxiliary film-forming components is hydroxyl polymeric resin and/or vinyl chloride-vinyl acetate resin, and described hydroxyl polymeric resin is selected from one or more in Hydroxylated acrylic resin, hydroxy polyester resin, hydroxy polyethers resin, hydroxyl alkyd resins or the Resins, epoxy.
2. coating composition according to claim 1, wherein, the second-order transition temperature of described thermoplastic acrylic resin is more than 80 ℃.
3. coating composition according to claim 1, wherein, the number-average molecular weight of described hydroxyl polymeric resin is 10,000-50,000, hydroxyl value is a 40-150mg KOH/g unit.
4. coating composition according to claim 1, wherein, gross weight with coating composition is a benchmark, the content of thermoplastic acrylic resin is 20-60 weight %, the content of auxiliary film-forming components is 5.0-20 weight %, the content of pigment is 10-30 weight %, and the content of solvent is 10-50 weight %.
5. according to claim 1 or 4 described coating compositions, wherein, described auxiliary film-forming components is the hydroxyl polymeric resin, and said composition also contains the isocyanic ester that accounts for coating composition gross weight 0-8 weight %.
6. coating composition according to claim 5, wherein, the content of described isocyanic ester accounts for the 0.1-5 weight % of described coating composition gross weight, and described isocyanic ester comprises one or more in aliphatics or alicyclic isocyanate-monomer, aliphatics or alicyclic isocyanate tripolymer or aliphatics or the alicyclic isocyanate performed polymer.
7. coating composition according to claim 6, wherein, described isocyanic ester is the aliphatic isocyanates tripolymer, and described aliphatic isocyanates tripolymer is selected from one or more in isophorone diisocyanate trimer, dicyclohexyl methane diisocyanate tripolymer, hexamethylene diisocyanate tripolymer, the hexahydrotoluene vulcabond.
8. coating composition according to claim 1, wherein, described vinyl chloride-vinyl acetate resin is selected from one or more in vinylchlorid-vinyl-acetic ester, vinylchlorid-vinyl acetate-hydroxy acrylate, vinylchlorid-vinyl acetate-maleic acid ester or vinylchlorid-vinyl acetate-ethene alcohol ester.
9. according to claim 1 or 8 described coating compositions, wherein, the number-average molecular weight of described vinyl chloride-vinyl acetate resin is 13000-42000.
10. according to claim 1 or 4 described coating compositions, wherein, described coating composition also contains cellulose acetate butyrate and/or Nitrocellulose, and the content of described cellulose acetate butyrate or Nitrocellulose is the 1-5 weight % of coating composition gross weight.
11. according to claim 1 or 4 described coating compositions, wherein, described coating composition also contains the hardness reinforcer that accounts for coating composition gross weight 0.1-8 weight %, described hardness reinforcer is selected from aluminum oxide powder, one or more in ultrafine silica powder, silica powder, ceramics powder, silicate powder, the polymethylmethacrylate powder.
12. coating composition according to claim 11, wherein, the Mohs' hardness of described hardness reinforcer is 3-10Mohs, and particle diameter is the 2-8 micron.
13. the preparation method of the described coating composition of claim 1, this method comprises: thermoplastic acrylic resin and solvent is even, add pigment then, stir, it is characterized in that, this method also is included in and adds auxiliary film-forming components in the mixture of described thermoplastic acrylic resin and solvent and mix, described auxiliary film-forming components is hydroxyl polymeric resin and/or vinyl chloride-vinyl acetate resin, and described hydroxyl polymeric resin is selected from one or more in Hydroxylated acrylic resin, hydroxy polyester resin, hydroxy polyethers resin, hydroxyl alkyd resins or the Resins, epoxy.
14. preparation method according to claim 13, wherein, the add-on of thermoplastic acrylic resin, solvent, pigment and auxiliary film-forming components makes in the coating composition that obtains and contains, gross weight with coating composition is a benchmark, the thermoplastic acrylic resin of 20-60 weight %, 5.0-20 the auxiliary film-forming components of weight %, the solvent of the pigment of 10-30 weight % and 10-50 weight %.
15. according to claim 13 or 14 described preparation methods, wherein, described film-forming components is the hydroxyl polymeric resin, this method also comprises isocyanic ester is added in the mixture of thermoplastic acrylic resin, solvent, pigment and auxiliary film-forming components, the add-on of described isocyanic ester makes in the coating composition that obtains and contains, gross weight with coating composition is a benchmark, the isocyanic ester of 0.1-5 weight %.
16. preparation method according to claim 13 or 14 described coating compositions, wherein, this method also is included in and adds cellulose acetate butyrate and/or Nitrocellulose in the mixture of described auxiliary film-forming components, thermoplastic acrylic resin and solvent and mix, the add-on of described cellulose acetate butyrate and/or Nitrocellulose is to make in the coating composition that obtains to contain, gross weight with coating composition is a benchmark, 1-5 weight % cellulose acetate butyrate and/or Nitrocellulose.
17. preparation method according to claim 13 or 14 described coating compositions, wherein, this method also comprises and will add hardness reinforcer and mix in the mixture of described auxiliary film-forming components, described thermoplastic acrylic resin and solvent, the add-on of described hardness reinforcer makes in the coating composition that obtains and contains, gross weight with coating composition is a benchmark, 0.1-8 the hardness reinforcer of weight %, described hardness reinforcer is selected from aluminum oxide powder, one or more in ultrafine silica powder, silica powder, ceramics powder, silicate powder, the polymethylmethacrylate powder.
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| CN2006101410422A CN101153155B (en) | 2006-09-28 | 2006-09-28 | Priming coating composition and preparation method thereof |
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| CN2006101410422A CN101153155B (en) | 2006-09-28 | 2006-09-28 | Priming coating composition and preparation method thereof |
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