CN102702938A - Water-based coating composition and preparation method thereof - Google Patents
Water-based coating composition and preparation method thereof Download PDFInfo
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- CN102702938A CN102702938A CN2012101949698A CN201210194969A CN102702938A CN 102702938 A CN102702938 A CN 102702938A CN 2012101949698 A CN2012101949698 A CN 2012101949698A CN 201210194969 A CN201210194969 A CN 201210194969A CN 102702938 A CN102702938 A CN 102702938A
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Abstract
The invention relates to a water-based coating composition and a preparation method thereof. According to the invention, the water-based coating composition comprises 1.0-3.0 parts of adhesion force regulators, 7-15 parts of deionized water, 7-15 parts of ethanol and 60-90 parts of adhesives crosslinked in an organic solvent, wherein the water-based coating composition, prepared by the method of the invention, is applied to the surface of an object, so that a strippable coating protecting film is formed, and the strippable coating protecting film has the advantages of excellent comprehensive performance, environmental friendliness, quick normal temperature drying, wide strippable temperature range, good strippable performance and excellent anti-scratch performance.
Description
Technical field
[0001] the present invention relates to a kind of water-based paint compositions and preparation method thereof, it is good and have water-borne coatings of scratch resistance performance and preparation method thereof to relate in particular to wide, the peelable performance of a kind of peelable TR.
Background technology
Appearance paint films such as automobile, naval vessel, weaponry, all kinds of mechanical means; All there is the possibility that receives damage in various degree owing to various reason on surfaces such as plastic component, all kinds of section bar, electric appliance casing, glass fiber reinforced plastics product in manufacturing, transportation, storage process, cause the loss of value of the product.As automobile sell to from dispatching from the factory to the user during this period of time in, normally be stored in the out of door parking.During this period of time, the automobile paint film will receive the erosion of various factorss such as ultraviolet ray, acid rain, industrial dust, building dust and birds frass.Consequent consequence is that the car surface quality that the user buied is lower than the coating quality when dispatching from the factory, and causes the loss of value of the product.Therefore, it is very necessary automobile being carried out provisional protection.
Domestic each automobile factory one does not protect at present, and the 2nd, adopt the wax protection, the 3rd, adopt the pad pasting protection, the 4th, extremely indivedual factories adopt strippable paint, but performance is undesirable.Harm without protective membrane: the car surface quality is lower than the coating quality when dispatching from the factory, and causes the loss of value of the product.Adopt wax protection characteristics to be: the cost of filming is low, but membrane removal (comprise and remove membrane solvent such as kerosene etc., membrane removal water treating equipment, membrane removal manual work) cost is high, and environmental pollution is big.Adopt the harm of pad pasting protection: cost is high, the pad pasting unfairness, is difficult for tearing after the time is long, destroys sometimes even car surface paint.
At present domestic have indivedual automobile factorys to use Stripable paint, but general shortcoming is more.
These coating have following than significant disadvantages: 1, smell is big, not environmental protection; 2, dry slow, even will dry, not energy-conservation; 3, peelable TR is narrow, requires 10-30 ℃; It is 4, long-term that (six months) are outdoor is difficult to divest peelable poor performance after being exposed to the sun.For example; 200880018768.4 invent a kind of water-based paint compositions that is used on base material, forming peelable temporary coating; Said water-based paint compositions comprises at least a water-based film-forming polymkeric substance, it is characterized in that the extra amino resin based polymer solid particulate that comprises of said compsn.This invention contains the amino resin based polymer solid particulate; With the amino resin based polymer solid particulate as the additive in the water-based paint compositions to improve the strippability of stripping lacquer; This solid particulate requires in the drying and forming-film process with high boiling point or harmful organic solvent such as dimethyl-dipropylene glycol, Pyranton, MIBK, 2; 2; 4-trimethylammonium-1,3-pentanediol mono isobutyrate (Texanol), ETHYLE ACETATE, MIBK, toluene, YLENE etc. help film forming, and the existence of these organic solvents can help the coalescence of dispersive polymer beads and form uniform films.But the adding of these organic solvents will inevitably increase the smell of water-based paint compositions, causes drying at room temperature slow simultaneously, requires dry 2 hours, or following dry 30 minutes at 60 ℃.
CN 102127345 A the making method of a kind of water-based paint compositions, water-based paint compositions is disclosed and with water-based paint compositions as the method for strip(pable)coating protective membrane.Water-based paint compositions of the present invention is base-material with the synthetic resin emulsion; With water is dispersion medium; The water-based paint compositions that adopts method of the present invention to make is applied to body surface forms the strip(pable)coating protective membrane; The strip(pable)coating protective membrane excellent combination property that forms, environmental protection, wide, the peelable performance of fast, the peelable TR of Air drying are good.Though the strip(pable)coating protective membrane that the water-borne coatings that this invention provides forms has excellent peelable performance, its scratch resistance performance but remains further to be improved.
Summary of the invention
The object of the present invention is to provide a kind of water-based paint compositions, the excellence of its peelable performance and scratch resistance performance.
Water-based paint compositions provided by the present invention comprises following material according to parts by weight:
(A) sticking power regulator: 1.0-3.0 part,
(B) deionized water: 7-15 part,
(C) ethanol: 7-15 part,
(D) the crosslinkable tackiness agent in organic solvent of 60-90 part, this tackiness agent of binding agent based gross weight contains following component:
I) the propylene acid polyol of about 15-70%, the weight-average molecular weight of this many alcohol is about 2500-40000, and hydroxyl value is about 50-180mg KOH/g, and second-order transition temperature is-30 to 70 ℃;
The ii) not necessarily substituted polyester polyol of about 5-60%; The weight-average molecular weight of this many alcohol is about 2000-80000; Hydroxyl value is about 50-220mg KOH/g; Not necessarily substituting group is selected from least a of trialkoxysilyl and urethanum, this polyester polyol contain at least about 10% weight following a), b) and c) at least a hydrogenation reaction product:
A) dimer (fatty acid) yl and polyvalent alcohol,
B) alcohol of polyprotonic acid and dimerization and
C) alcohol of dimer (fatty acid) yl and dimerization,
This reaction product contains at least two groups that are selected from acid and alcohol functional group; And
The iii) linking agent of about 10-60%, this linking agent is selected from least a of oxyalkylated melamine formaldehyde (MF) adducts and POLYMETHYLENE POLYPHENYLISOCYANATE.
In the optional use releasing agent of sticking power regulator in the above-mentioned water-based paint compositions, tensio-active agent, synthetic motor oil, silicone emulsion, the modified polyorganosiloxane one or more.Polarity and snappiness through adding sticking power regulator, adjustment latex molecule are regulated film adhesive, satisfy the requirement of different surfaces sticking power.The polymkeric substance that polarity is little, snappiness is good is favourable to the strip(pable)coating that forms.
Tackiness agent described in the present invention has improved the elasticity of Clear coating under situation the about outward appearance of coating and other performances not being had a negative impact.The outward appearance that final coloured coating-Clear coating is covered with paint, lacquer, colour wash, etc. depends on the etch of clear lacquer tackiness agent to base coat to a great extent.Should be realized that vibrin can be more much bigger than vinyl resin to the etch of base coat.This etch causes the dissolving again of base coat, causes the surface irregularity of final covering with paint, lower gloss and lower transparency.Because the lower molecular weight and the high hydroxyl value of oligopolymer are so this negative impact is more obvious for oligopolymer.Yet so just hydroxylated polyester has improved the elasticity of final crosslinked prescription, and the result has improved resistance to marring.
Propylene acid polyol (i)
Can obtain the propylene acid polyol through the monomer that makes hydroxyl and other monomer copolymerization that is usually used in the acrylic acid synthesizing coating resin.The monomer of above-mentioned hydroxyl for example is Hydroxyethyl acrylate, Rocryl 400, Propylene glycol monoacrylate, Rocryl 410, vinylformic acid hydroxy butyl ester etc.Above-mentioned other monomer for example is following these monomers:
The propenoate of the monohydroxy-alcohol of C1-18, for example methyl acrylate, Bing Xisuandingzhi, 2-EHA;
The methacrylic ester of the monohydroxy-alcohol of C1-18, for example TEB 3K, NSC 20956, methylacrylic acid 2-ethylhexyl;
The propenoate of cyclic aliphatic monohydroxy-alcohol or methacrylic ester, for example cyclohexyl methacrylate, isobornyl methacrylate, vinylformic acid 3-methyl cyclohexanol ester;
The propenoate of aromatics monohydroxy-alcohol or methacrylic ester, for example phenyl methacrylate, benzyl acrylate;
Vinyl aromatic compounds, for example vinylbenzene, Vinyl toluene, t-butyl styrene;
Nitrile monomer, for example vinyl cyanide;
Acid functional monomer, for example methylene-succinic acid, vinylformic acid;
Amide functional monomer, for example USAF RH-1, N-butoxymethyl USAF RH-1;
The monomer of silane-functional, for example γ-methacryloyl propyl-triethoxysilicane;
The monomer of glycidyl functional, for example SY-Monomer G; And
Other functional comonomer, these monomers comprise methylacrylic acid acetoacetoxy groups ethyl ester, methacryloyl ethyl phosphonic acid, perfluoroalkyl acrylate class, perfluoroalkyl methacrylate class etc.
Through in solvent or mixed solvent, prepare the propylene acid polyol as the polymerization that polymerization starter causes at the radical of the routine of 60-180 ℃ of TR such as azo or peroxide initiator.Typical solvent is aromatic substance, aliphatic cpd, acetate esters, ketone, alcohols and ethers, for example YLENE, propyl carbinol, petroleum spirit, methyl ethyl ketone, MIBK etc.
Can prepare the propylene acid polyol with batch process or reinforced method.In reinforced method, can monomer, initiator and chain-transfer agent be added simultaneously or add with the form of multiple spot reinforced (oblique is reinforced).Through derivatives chemical being grafted on the method on the tackiness agent main chain, can make this PEMULEN TR2 modification.The example of this modification is the reaction of lactone, single ether epoxy, single epoxy ester, acid anhydrides and monoprotic acid and hydroxyl, acid and epoxy-functional; The particularly reaction of 6-caprolactone, valerolactone and hydroxy functional group; The for example reaction of tertiary monocarboxylic acid list epoxy ester (Versatic acid mono epoxyester), PIVALIC ACID CRUDE (25) list epoxy ester and acid functional group of single epoxy ester; Acid anhydrides is the reaction of maleic anhydride, Tetra hydro Phthalic anhydride and hydroxy functional group for example, and monoprotic acid is the reaction of tetradecanoic acid, oleic acid, different n-nonanoic acid and epoxy-functional for example.These reactions can be accomplished between polymerization period.The method of another kind of modified copolymer is that functional monomer and modified compound are reacted, and then with other monomeric mixture copolymerization.For example, can before copolymerization, make Hydroxyethyl acrylate and 6-caprolactone reaction.
Polyester polyol (ii)
Through making polyprotonic acid and polyol reaction, and make their experience condensation reactions, can prepare polyester polyol as the principal reaction thing.
The example of monoprotic acid and polyprotonic acid is aromatic acid and acid anhydrides, aliphatic acid and acid anhydrides, cycloaliphatic acids and acid anhydrides.Their representative is: Tetra hydro Phthalic anhydride, m-phthalic acid, hexahydrophthalic anhydride, methyl cyclohexane acid anhydrides, 1; 2; 4-benzenetricarboxylic anhydride, different n-nonanoic acid, natural monoprotic acid is tall oil lipid acid, hexanodioic acid, dodecane dicarboxylic acid, 1 for example, 4-cyclohexane dicarboxylic acid etc.
The example of polyvalent alcohol is: USP Kosher, NSC 6366,1,6-pinakon, 2,2-ethyl butyl propanediol, TriMethylolPropane(TMP), monopentaerythritol, cyclohexanedimethanol, 1,2 ethylene glycol etc.
The typical structure of the diacid of long-chain and glycol is made up of the mixture of the dipolymer of linear, cyclic and aromatics, the form below can this structrual description being become.Should be realized that, under situation about coating not being had a negative impact, can contain the acid and/or the pure trimer of significant quantity.
Linking agent (iii)
Preferably make lacquer crosslinked with oxyalkylated MF resin.Prepare such linking agent with various mol ratios and molecular weight with melamine, formaldehyde and alcohol.Typical alcohol is methyl alcohol, isopropylcarbinol and propyl carbinol.Oxyalkylated MF resin is commercially availabie.The for example end capped POLYMETHYLENE POLYPHENYLISOCYANATE of linking agent that can also contain other is to improve antiacid erosion.End capped POLYMETHYLENE POLYPHENYLISOCYANATE is commercially availabie.Preferably the end capped Trimerization of Isophorone Diisocyanate thing of methyl ethyl ketone oxime is used as auxiliary crosslinking agent.
As optimal technical scheme, water-based paint compositions provided by the present invention also contains the color stuffing of 5-10 part, the skimmer of 0.5-1.5 part, the dispersion agent of 0.3-1.2 part, the thickening material of 1.0-3.0 part, the sanitas of 0.02-0.1 part.
Water-based paint compositions provided by the present invention can be chosen wantonly and contain color stuffing.The not concrete restriction of color stuffing of the present invention can be adopted the commercially available various color stuffings that are applicable to water-borne coatings, and this is known to those skilled in the art.As optimal technical scheme, the color stuffing in the water-based paint compositions of the present invention can be selected one or more in white titanium pigment, phthalocyanine blue, phthalocyanine green, carbon black, talcum powder, wollastonite powder, the calcium carbonate crystal whisker for use.
Coating by produce, canned, transportation, construction all have mechanical force to forming the whole process of paint film at last; Must a large amount of air be brought in the latex system, a large amount of foams can make the production operation difficulty, and plant factor is not enough; It is insufficient to cause pigment and stopping composition to disperse, even can't produce down.It is to stay many defectives to filming that a large amount of foams brings graver results in the time of can giving construction, like shrinkage cavity, and paint film disadvantages such as pin hole, crater.An effective skimmer acts on quite important in coating system.
Foam can be regarded as a quite a large amount of insoluble gas and is dispersed in the dispersion-s in the small amount of liquid, is under the effect of mechanical force, could to form.Foam is unsettled in itself, sometimes because the effect of the thermal motion of liquid own is enough to make it to vanish.It is generally acknowledged that froth breaking mechanism can be divided into following four processes: 1, skimmer is adsorbed onto the foamy surface; 2, skimmer is penetrated into the foamy surface; 3, skimmer spreads on foam surface, and the adsorption surface promoting agent; 4, foam tension imbalance-broken bubble.
Can be known that by froth breaking mechanism skimmer is the liquid of low surface tension, generally should have following characteristic: 1, the surface tension of skimmer is less than the surface tension that needs froth breaking liquid self; 2, the solubleness in needing the liquid of froth breaking is as far as possible little; 3, good dispersiveness to be arranged.4, can not react with the liquid of want froth breaking, can not influence the force of cohesion of pigment in the coating and the stability of emulsion.5, stronger diffusive force to be arranged.6, can not influence the performance of finished product rubber-emulsion paint.7, unpleasant odor can not be arranged.
As optimal technical scheme, the skimmer in the water-based paint compositions of the present invention can be selected one or both in mineral oils, the organopolysiloxane class for use.
The dispersion of powder, wetting principle, the one, dispersant adsorption is in the powder particle, and the powder particle of cohesion is moistening; The 2nd, macromolecule dispersing agent is adsorbed on the powder particle surface, increases pigment and the interparticle surface charge of stopping composition, improves interparticle electrostatic repulsion, and has effectively increased interparticle sterically hinderedly, makes that the particle stabilized dispersion of powder becomes possibility in the liquid.Divide according to molecular structure, dispersion agent generally is divided into two big types: inorganic dispersant and organic dispersing agent.In the majority in the inorganic dispersant with the polyphosphoric acid salt, like Sodium hexametaphosphate 99, Potassium tripolyphosphate, sodium polyphosphate and TKPP.The mechanism of its effect is through hydrogen bond and chemisorption, plays the electrostatic repulsion stabilization.Its advantage is good to mineral dye and stopping composition dispersion effect, but with the rising of pH value and temperature, the easy hydrolysis of polyphosphoric acid salt, not good to extended storage stability.Organic dispersing agent comprises polyacrylate, PS/maleic acid salt, polyisobutene/maleic acid salt etc.Their characteristics are, produce strong absorption or anchorage effect on the powder surface, and it is sterically hindered to form to have long molecular chain, and the end of the chain has water-soluble, and what have also auxilliaryly has electrostatic repulsion, reaches stable result.
Organic dispersing agent is different because of its molecular weight, and performance can be different; Lower molecular weight type dispersion agent has the polar group that is close on one or more spaces; They are adsorbed on surface of pigments, are used for the stabilizing powder particle with spatial masking, thereby make viscosity degradation; This type dispersion agent is mainly used in mineral dye; Because of mineral dye is an ionic structure, higher surface polarity is arranged, dispersion agent is easy to absorption.And pigment dyestuff contains C, H, O group because of its surface, and no ionic activity so often use the high-molecular weight dispersion agent, has the more surface that group is adsorbed on pigment dyestuff of sticking, and it can form persistent adsorption layer on pigment dyestuff.But too Da Yi flocculation of the molecular weight of dispersion agent.So should select according to pigment and stopping composition type during the type of selection dispersion agent.
As optimal technical scheme, the dispersion agent in the water-based paint compositions of the present invention is selected for use is in polyacrylic acid sodium salt, the non-ionic surfactant one or both.
Coating and viscosity are closely related.It has a very important characteristic is exactly thixotropy.Thixotropic being characterised in that has when static certain very weak reticulated structure to form, and forms physical crosslinking like the hydrogen bond between polymkeric substance; With the pigment particles is that bridge all shows as thickening by " crosslinked " that its polar adsorption forms between the polymkeric substance.Viscosity and shearing force then show as thixotropy, have applied viscosity degradation after the shearing force, and promptly reticulated structure is destroyed; In case the shearing force of removing, reticulated structure progressively recovers, and viscosity rises again.It is a pseudo-plasticity phenomenon relevant with time and shearing force.When coating ideal state promptly is storage, higher viscosity is arranged to stablize whole system better; During coating application, need lower viscosity to obtain to construct preferably leveling characteristics.This thixotropy needs to rely on an ideal rheology thickened systems just can reach, it well this quiet one moving viscosity of balance change, thixotropy is preferably promptly arranged.
As optimal technical scheme, what the thickening material in the water-based paint compositions of the present invention was selected for use is the nonionic polyurethane compounds.
Sanitas can suppress the mould-growth in the coating, makes coating keep steady quality.As optimal technical scheme, sanitas of the present invention is 1,2-benzisothiazole-3-1 and verivate thereof.
The present invention also provides a kind of method for preparing above-mentioned water-based paint compositions, comprises following steps:
The parts by weight of the accurate weighing of i claim 1 each component that said water-based paint compositions comprises;
Ii under agitation adds sanitas in the mixture of ethanol, deionized water subsequent use for (1);
Iii is formulated in the crosslinkable tackiness agent (2) in the organic solvent;
Iv under agitation adds dispersion agent, color stuffing, sticking power regulator, thickening material, skimmer and (1) in (2) successively, stirs and is a kind of water-based paint compositions in 15 minutes.
The present invention simultaneously is through substituting portion water, adding the aciculiform fleut with ethanol; Like wollastonite powder; Wollastonite powder is a needle-like crystal; This for moisture in the drying process fast through passage is provided, help accelerating rate of drying, select the methods such as add-on of fast dry emulsion and the difficult volatilization of control composition to improve rate of drying.Improve Air drying speed with simple and economical method, but need not toast the seasoning film forming.
Water-based paint compositions of the present invention is applied to the strip(pable)coating protective membrane that body surface forms, and (25～35 ℃) 30 minutes can be dry under the room temperature, has good peelable performance and scratch resistance performance, and 0～50 ℃ of craft can divest.Simultaneously, this strip(pable)coating protective membrane excellent combination property, smell is low, asepsis environment-protecting; Air drying is fast, save energy; Peelable TR is wide, and paint film 0-50 ℃ peelable, and peelable performance is good, does not influence peelable performance at outdoor life-time service; Do not produce water when peeling off and pollute, water, solvent resources such as (like kerosene) are saved in the enabling environment protection.
Coating composition of the present invention has good tack to various grounds (particularly metal substrate), and these grounds for example are ground, cold-rolled steel sheet, phosphatization steel plate that applied in advance and the steel plate that applied with conventional priming paint through electro-deposition method.Compsn of the present invention can also be used for the coating plastic ground, for example polymeric amide of the urethane of polyester enhanced spun glass, reaction injection molding, partial crystallization etc.
Embodiment
For ease of understanding the present invention, it is following that the present invention enumerates embodiment.Those skilled in the art should understand, and said embodiment only is used for helping to understand the present invention, should not be regarded as concrete restriction of the present invention.
Specify like nothing, various raw materials of the present invention all can obtain through commercially available; Or prepare according to the ordinary method of this area.Only if definition or explanation are arranged in addition, the same meaning that all specialties used herein and scientific words and those skilled in the art are familiar with.Any in addition with the institute similar content of putting down in writing or the equalization method and material all can be applicable in the inventive method.
The experimental technique of unreceipted actual conditions in the following example is measured according to national standard usually.If there is not a corresponding national standards, then carry out according to general international standard, normal condition or according to the condition that manufacturer advises.Unless otherwise indicated, otherwise all umbers are weight part, and all per-cents are weight percentage, and described polymericular weight is a number-average molecular weight.
Only if definition or explanation are arranged in addition, the same meaning that all specialties used herein and scientific words and those skilled in the art are familiar with.Any in addition with the institute similar content of putting down in writing or the equalization method and material all can be applicable in the inventive method.
Embodiment 1
(A) AS-HW301 aqueous release agent: 1.0 parts,
(B) deionized water: 15 parts,
(C) ethanol: 7 parts,
(D) 70 parts the crosslinkable tackiness agent in organic solvent, this tackiness agent of binding agent based gross weight contains following component:
I) about 15% propylene acid polyol, the weight-average molecular weight of this many alcohol are about 40000, and hydroxyl value is about 180mg KOH/g, and second-order transition temperature is 70 ℃;
Ii) about 60% not necessarily substituted polyester polyol; The weight-average molecular weight of this many alcohol is about 2000; Hydroxyl value is about 50mg KOH/g; Not necessarily substituting group is selected from least a of trialkoxysilyl and urethanum, this polyester polyol contain at least about 10% weight following a), b) and c) at least a hydrogenation reaction product:
A) dimer (fatty acid) yl and polyvalent alcohol,
B) alcohol of polyprotonic acid and dimerization and
C) alcohol of dimer (fatty acid) yl and dimerization,
This reaction product contains at least two groups that are selected from acid and alcohol functional group; And
Iii) about 60% linking agent, this linking agent are selected from oxyalkylated melamine formaldehyde (MF) adducts.
0.5 the 082 water-based skimmer of part,
0.3 the DP-18 dispersion agent of part.
Embodiment 2
(A) AS-HW301 aqueous release agent: 1.0 parts, 2.0 parts of SM5W-40 ucon oils
(B) deionized water: 7 parts,
(C) ethanol: 15 parts,
(D) 90 parts the crosslinkable tackiness agent in organic solvent, this tackiness agent of binding agent based gross weight contains following component:
I) about 70% propylene acid polyol, the weight-average molecular weight of this many alcohol are about 2500, and hydroxyl value is about 50mgKOH/g, and second-order transition temperature is-30 ℃;
Ii) about 60% not necessarily substituted polyester polyol; The weight-average molecular weight of this many alcohol is about 80000; Hydroxyl value is about 220mg KOH/g; Not necessarily substituting group is selected from least a of trialkoxysilyl and urethanum, this polyester polyol contain at least about 10% weight following a), b) and c) at least a hydrogenation reaction product:
A) dimer (fatty acid) yl and polyvalent alcohol,
B) alcohol of polyprotonic acid and dimerization and
C) alcohol of dimer (fatty acid) yl and dimerization,
This reaction product contains at least two groups that are selected from acid and alcohol functional group; And
Iii) about 10% linking agent, this linking agent are selected from oxyalkylated melamine formaldehyde (MF) adducts.
5 parts wollastonite powder,
1.5 the 082 water-based skimmer of part,
1.2 the DP-18 dispersion agent of part,
1.0 the WT-105A water-based thickener of part,
0.02 Hua Ke-981 water-borne preservative of part
Embodiment 3
(A) AS-HW301 aqueous release agent: 2.0 parts,
(B) deionized water: 10 parts,
(C) ethanol: 10 parts,
(D) 60 parts the crosslinkable tackiness agent in organic solvent, this tackiness agent of binding agent based gross weight contains following component:
I) about 45% propylene acid polyol, the weight-average molecular weight of this many alcohol are about 25000, and hydroxyl value is about 100mg KOH/g, and second-order transition temperature is 10 ℃;
Ii) about 35% not necessarily substituted polyester polyol; The weight-average molecular weight of this many alcohol is about 20000; Hydroxyl value is about 100mg KOH/g; Not necessarily substituting group is selected from least a of trialkoxysilyl and urethanum, this polyester polyol contain at least about 10% weight following a), b) and c) at least a hydrogenation reaction product:
A) dimer (fatty acid) yl and polyvalent alcohol,
B) alcohol of polyprotonic acid and dimerization and
C) alcohol of dimer (fatty acid) yl and dimerization,
This reaction product contains at least two groups that are selected from acid and alcohol functional group; And
Iii) about 40% linking agent, this linking agent are at least a of POLYMETHYLENE POLYPHENYLISOCYANATE.
7 parts wollastonite powder,
1.2 the 082 water-based skimmer of part,
0.9 the DP-18 dispersion agent of part,
2.0 the WT-105A water-based thickener of part,
0.05 Hua Ke-981 water-borne preservative of part
Embodiment 4
(A) AS-HW301 aqueous release agent: 1.0 parts, 1.5 parts of SM5W-40 ucon oils
(B) deionized water: 12 parts,
(C) ethanol: 14 parts,
(D) 80 parts the crosslinkable tackiness agent in organic solvent, this tackiness agent of binding agent based gross weight contains following component:
I) about 30% propylene acid polyol, the weight-average molecular weight of this many alcohol are about 8000, and hydroxyl value is about 120mgKOH/g, and second-order transition temperature is 30 ℃;
Ii) about 55% not necessarily substituted polyester polyol; The weight-average molecular weight of this many alcohol is about 10000; Hydroxyl value is about 120mg KOH/g; Not necessarily substituting group is selected from least a of trialkoxysilyl and urethanum, this polyester polyol contain at least about 10% weight following a), b) and c) at least a hydrogenation reaction product:
A) dimer (fatty acid) yl and polyvalent alcohol,
B) alcohol of polyprotonic acid and dimerization and
C) alcohol of dimer (fatty acid) yl and dimerization,
This reaction product contains at least two groups that are selected from acid and alcohol functional group; And
Iii) about 36% linking agent, this linking agent are selected from oxyalkylated melamine formaldehyde (MF) adducts.
The wollastonite powder of 5-10 part,
0.5-1.5 the 082 water-based skimmer of part,
0.3-1.2 the DP-18 dispersion agent of part,
1.0-3.0 the WT-105A water-based thickener of part,
0.02-0.1 Hua Ke-981 water-borne preservative of part.
Comparative Examples
Comparative Examples 1 and 2 is respectively the embodiment 2 and 4 among CN 102127345 A.
Water-based paint compositions in embodiment 1 ~ 4 and the Comparative Examples can adopt the constructional method of brushing, roller coat, spraying, and on amino varnish, colored paint, glass, stainless steel substrate, (25～35 ℃) 30 minutes can be dry under the normal temperature.Not only have good peelable performance at indoor storage, still fine at outdoor (more than six months) strippability for a long time.0～50 ℃ of craft can divest.
In embodiment 1 ~ 4 and the Comparative Examples water-based paint compositions be sprayed on the test plate (panel) that scribbles amino varnish, carry out rate of drying and adhesion test, the sticking power evaluation method adopts ISO 2409:2007 (E) paint and varnish-cross cut test in this experiment.The result shows that at room temperature be 30 minutes (25～35 ℃) time of drying; Test its sticking power >=4 grade under 24 hours condition of seasoning; Its sticking power of test is >=4 grades under the condition of 82 ℃ * 168h; Its sticking power of test is >=4 grades under the condition of the aging 250h of QUV, and its sticking power of test is >=4 grades under the condition of 60 ℃ of water vapour 168h.
Through 60 circulations that synthetic materials (Vilaterm) brush that makes model stand to rotate combines with the univocal solution that contains abrasive material, carry out the test of scratch resistance performance.This scratch resistance performance demonstrates the per-cent that scratches the back loss of gloss.It is excellent, fine, good-fine, good, medium good, medium, poor pressing the appearance ratings of yielding and pledge allegiance to preface.Importantly must obtain the two balance of outward appearance and resistance to marring.Therefore, in following table, when outward appearance is in " good-fine ", can allow loss of gloss is 22% resistance to marring.But, when outward appearance is merely " medium ", even loss of gloss is 5% also to be underproof.The embodiment among the present invention and the test result of Comparative Examples are following:
Claims (10)
1. a water-based paint compositions is characterized in that, comprises following material according to parts by weight:
(A) sticking power regulator: 1.0-3.0 part,
(B) deionized water: 7-15 part,
(C) ethanol: 7-15 part,
(D) the crosslinkable tackiness agent in organic solvent of 60-90 part, this tackiness agent of binding agent based gross weight contains following component:
I) the propylene acid polyol of about 15-70%, the weight-average molecular weight of this many alcohol is about 2500-40000, and hydroxyl value is about 50-180mg KOH/g, and second-order transition temperature is-30 to 70 ℃;
The ii) not necessarily substituted polyester polyol of about 5-60%; The weight-average molecular weight of this many alcohol is about 2000-80000; Hydroxyl value is about 50-220mg KOH/g; Not necessarily substituting group is selected from least a of trialkoxysilyl and urethanum, this polyester polyol contain at least about 10% weight following a), b) and c) at least a hydrogenation reaction product:
A) dimer (fatty acid) yl and polyvalent alcohol,
B) alcohol of polyprotonic acid and dimerization and
C) alcohol of dimer (fatty acid) yl and dimerization,
This reaction product contains at least two groups that are selected from acid and alcohol functional group; And
The iii) linking agent of about 10-60%, this linking agent is selected from least a of oxyalkylated melamine formaldehyde (MF) adducts and POLYMETHYLENE POLYPHENYLISOCYANATE.
2. water-based paint compositions according to claim 1 is characterized in that, also contains the color stuffing of 5-10 part, the skimmer of 0.5-1.5 part, the dispersion agent of 0.3-1.2 part, the thickening material of 1.0-3.0 part, the sanitas of 0.02-0.1 part.
3. water-based paint compositions according to claim 1 is characterized in that, one or more in the optional use releasing agent of described sticking power regulator, tensio-active agent, synthetic motor oil, silicone emulsion, the modified polyorganosiloxane are compound.
4. water-based paint compositions according to claim 1 is characterized in that, the molecular weight of described propylene acid polyol is 3000-10000, and hydroxyl value is 80-150, and second-order transition temperature is-10 to 50 ℃;
Preferably, described propylene acid polyol contains at least one trialkoxysilyl group.
5. water-based paint compositions according to claim 1 is characterized in that, the molecular weight of described polyester polyol is 2500-15000, and hydroxyl value is 100-170, be selected from a), b) and hydrogenation reaction product c) account for about 30-60% of polyester polyol weight;
Preferably, described polyester polyol contains at least a substituting group that is selected from trimethoxysilyl and urethane groups.
6. water-based paint compositions according to claim 1 is characterized in that described color stuffing can select for use in white titanium pigment, phthalocyanine blue, phthalocyanine green, carbon black, talcum powder, wollastonite powder, the calcium carbonate crystal whisker one or more compound.
7. water-based paint compositions according to claim 1 is characterized in that described skimmer can select for use in mineral oils, the organopolysiloxane class one or both compound.
8. water-based paint compositions according to claim 1, what it is characterized in that described dispersion agent selects for use is a kind of in polyacrylic acid sodium salt, the non-ionic surfactant or two kinds.
9. water-based paint compositions according to claim 1, what it is characterized in that described thickening material selects for use is the nonionic polyurethane compounds;
Preferably, described sanitas is 1,2-benzisothiazole-3-1 and verivate thereof.
10. the preparation method of a water-based paint compositions as claimed in claim 1 comprises the steps:
The parts by weight of the accurate weighing of i claim 1 each component that said water-based paint compositions comprises;
Ii under agitation adds sanitas in the mixture of ethanol, deionized water subsequent use for (1);
Iii is formulated in the crosslinkable tackiness agent (2) in the organic solvent;
Iv under agitation adds dispersion agent, color stuffing, sticking power regulator, thickening material, skimmer and (1) in (2) successively, stirs and is a kind of water-based paint compositions in 15 minutes.
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| CN2012101949698A CN102702938A (en) | 2012-06-13 | 2012-06-13 | Water-based coating composition and preparation method thereof |
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Application publication date: 20121003 |