摘要:
A binding-agent composition for solvent-based or aqueous coating agents can be cured at low temperature to produce coatings which are non-yellowing and resistant to solvents. The binding-agent composition contains binding-agent components based on polyethers, polyesters, polyether polyesters and/or (meth)acrylic copolymers with, in each case, at least one acryloyl group and at least one epoxide group in the molecule, whereby the acryloyl groups and epoxide groups are present in the ratio 2:8 to 8:2. Also included are several polyamines as curing agents in a proportion of equivalent weights ranging from 2:0.5 to 1:1.5. The binding agents are used in pigmented and pigment-free lacquers, for use particularly in multi-layer lacquering.
摘要:
Previous two-component coatings with enamine components cured very slowly at low temperatures and led to yellowed products. A binder composition is prepared which cures rapidly at low temperatures and leads to non-yellowing products. It contains as CH-acid component a polymer with at least two enamine functions in the molecule, obtained byA) transesterification of a .beta.-keto-ester with hydroxyl-group-containing compounds or polymers which contain at least two hydroxyl groups in the molecule, with an OH value of at least 50 and a number-average molecular weight of 500 to 10,000, followed by reaction with ammonia or primary and/or secondary amines, andB) as .alpha.,.beta.-unsaturated component a compound with at least two groups of the general formula R.sub.1 R.sub.2 C.dbd.CR.sub.3 --X; in which X signifies --CO-- which is bonded via the residue of a di- or polyhydric alcohol, a di- or polyamine or an aminoalcohol to a further R.sub.1 R.sub.2 C.dbd.CR.sub.3 --X group, where R.sub.1, R.sub.2 and R.sub.3 signify hydrogen or an alkyl group, components A) and B) are present in the ratio 2:1 to 1:1.5 relative to their equivalent weights, the composition exists as a two-component system, and component A) contains a Lewis or Bronsted base as catalyst.
摘要翻译:以前的双组分涂料,烯胺组分在低温下非常缓慢地固化并导致黄色产品。 制备粘合剂组合物,其在低温下快速固化并导致非黄变产物。 它包含作为CH酸组分的分子中具有至少两个烯胺功能的聚合物,其通过以下方式获得:A)β-酮酯与含有羟基的化合物或在分子中含有至少两个羟基的聚合物的酯交换 OH值至少为50,数均分子量为500至10,000,随后与氨或伯胺和/或仲胺反应,B)作为α,β-不饱和组分,具有至少两个 通式为R1R2C = CR3-X的基团; 其中X表示-CO-,其通过二元或多元醇,二胺或多胺或氨基醇的残基与另外的R 1 R 2 C = CR 3 -X基团结合,其中R 1,R 2和R 3表示氢或烷基 组分A)和B)相对于其当量的比例为2:1至1:1.5,组合物以双组分体系存在,组分A)含有路易斯或布朗斯台德碱作为催化剂。
摘要:
A binding-agent composition for coating agents which can be cured at low temperature contains:A. 4-72% by weight of an acidic CH-compound, obtained by transesterification of an aliphatic .beta.-ketocarboxylic acid ester with one or several monomers and/or polymers containing hydroxyl groups and which contain at least two hydroxyl groups in the molecule,B. 4-72% by weight of an .alpha.,.beta.-unsaturated compound with at least two groups of the general formulaR.sub.1 R.sub.2 C.dbd.CR.sub.3 --CO--attached via the residue of a divalent or polyvalent alcohol, a diamine or polyamine or amino alcohol to at least one additional R.sub.1 R.sub.2 C.dbd.CR.sub.3 --CO--group, where R.sub.1, R.sub.2 and R.sub.3 independently of each other are a hydrogen atom or a straight or branched alkyl residue with 1 to 10 carbon atoms,C. 10-80% by weight of one or several polyamines with, by way of curing agents, at least two amine functions, which can be primary and/or secondary and can be blocked, in the molecule, andD. 0.01-5% by weight, relative to the sum of the weights of components A), B) and C), of a catalyst in the form of a Lewis or Bronstedt base, whereby the conjugated acids of the latter have a pKA-value of at least 10.
摘要翻译:用于在低温下固化的涂布剂的粘合剂组合物包含:A. 4-72重量%的酸性CH-化合物,其通过脂族β-酮羧酸酯与一种或几种单体的酯交换和/ 或含有羟基并且在分子中含有至少两个羟基的聚合物,B 4-72重量%的α,β-不饱和化合物,其具有至少两个通式R 1 R 2 C = CR 3 -CO-连接通过的基团 二价或多价醇,二胺或多胺或氨基醇的残基至少一个另外的R 1 R 2 C = CR 3 -CO-基团,其中R 1,R 2和R 3彼此独立地是氢原子或直链或支链烷基 具有1至10个碳原子,C 10-80重量%的一种或多种多胺,通过固化剂,在分子中可以是伯和/或仲和可以被阻断的至少两种胺官能团 ,和D 0.01-5重量%,相对于 组分A),B)和C)的重量,其为路易斯或布朗斯台德形式的催化剂,由此后者的共轭酸的pKA值至少为10。
摘要:
The invention concerns a binder suitable for clear or pigmented coating agents. Binders based on copolymers containing hydroxyl groups have hitherto a high solvent content. The solids content of the new binders is improved without affecting the viscosity; gloss, body, flow and processing properties of coatings containing the new binders are improved. The binders consist essentially of a copolymer containing hydroxyl groups, made from specific quantities of styrol, tertbutacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, 2-hydroxypropyl methacrylate, butanediol-1, 4-monoacrylate, acrylic acid and glycidyl esters of .alpha.-alkylalkane monocarboxylic acids and/or .alpha.,.alpha.-dialkylalkane monocarboxylic acids.
摘要:
Coating agents are described, that are suitable for the production of pigmented or transparent top coatings, based on hydroxy-functional (meth)acrylic copolymers, aliphatic and/or cycloaliphatic polyisocyanates, solvents, and customary lacquer additives and pigments. They are free from epoxy resins and nitrocellulose and contain as binder A) one or more (meth)acrylic copolymers, containing hydroxyl groups, from a1) 47-53 wt % of one or more aromatic vinyl compounds, a2) 28-33 wt % of one or more hydroxyalkyl methacrylates, a3) 14-19 wt % of one or more alkyl (meth)acrylates, and a4) 0.5-2 wt % acrylic acid and/or methacrylic acid, with a hydroxyl number of 120-160 mg KOH/g, an acid number of 5 to 15 mg KOH/g, a weight-average molecular weight of 10,000 to 20,000 and a glass transition temperature of +40.degree. C. to +60.degree. C., and B) an aliphatic and/or cycloaliphatic polyisocyanate or a mixture of such polyisocyanates in such an amount that 0.5 to 2.0 isocyanate groups are present for one hydroxyl group of component A).
摘要:
Previous coating materials lead to the formation of bubbles at high layer thickness and when drying by heating. The new coating materials are intended to be bubble-free when dried at higher layer thicknesses.Aside from pigments and/or extenders, the coating material contains solvents and, if necessary, conventional paint auxiliaries in a vehicle mixture, comprising essentially 60-75% by weight of a hydroxy-functional copolymer, 1-5% by weight of an ester-soluble nitrocellulose and 25-35% by weight of difunctional or multifunctional polyisocyanate. It can be cured without forming bubbles even when applied in thick layers.Use as primer and filler.
摘要:
A pigment dispersion and its use for the preparation of coating compounds are described. The dispersion contains a pigment, solvent and pigment dispersing agent. The pigment dispersing agent is a copolymer containing OH groups, obtainable by the reaction of:(A) 80 to 95% by weight of a copolymer of:(a) 0.5 to 40% by weight of N,N-di-Cl to 4-alkylamino-C.sub.1 to .sub.8 -alkyl(meth)acrylamides and/or a mixture of N,N-di-C to 4-alkylamino-C.sub.1 to 8 -alkyl(meth)acrylates and N-substituted (meth)acrylamides and/or (meth)acrylamide in which the ratio of amino(meth)acrylates to amido(meth)acrylates should be in the range of from 1:2 to 2:1,(b) 10 to 40% by weight of hydroxy-C.sub.2-8 -alkyl (meth)acrylates and(c) 20 to 89.5% by weight of copolymerizable, .alpha., .beta.-olefinically unsaturated compounds with(B) 5 to 20% by weight of a polyisocyanate containing unmasked and optionally also masked isocyanate groups as well as biuret, urethane or isocyanurate groups.
摘要:
A rheology-influencing agent for coating media, containing a mixture of a (meth)acrylic copolymer containing hydroxyl groups and/or one or more polyesters containing hydroxyl groups, a hydroxy functional microdispersion obtainable by preparing a solution of one or more film-forming polyesters containing hydroxyl and/or carboxyl groups and/or (meth)acrylic copolymers containing hydroxyl and/or carboxyl groups, the foregoing mixture being reacted with a diisocyanate, and an aliphatic primary monoamine.
摘要:
A transparent coating agent which is free of heavy metal catalysts and which contains a hydroxy functional (meth)acrylic copolymer based binder, an aliphatic or cycloaliphatic polyisocyanate crosslinking agent, a solvent, and lacquer adjuvant.
摘要:
A solvent based coating composition containing a binding agent, the binding agent comprising: (a) 10 to 80 wt.% of at least one hydroxyfunctional polyester formed by reacting a mixture comprising: (i) 10 to 40 mol.% of a 2,2-dialkylalkanediol with two primary OH groups; (ii) 10 to 30 mol.% of a polyol with at least one secondary OH group; (iii) 20 to 50 mol.% of an aliphatic or cycloaliphatic dicarboxylic acid with fewer than 16 C atoms or anhydrides thereof; (iv) 5 to 30 mol.% of a compound selected from the group consisting of dimeric fatty acids, dimeric diols, epsilon-caprolactone, and mixtures thereof; (v) 1 to 15 mol.% of a hydroxycarboxylic acid with at least one hydroxy group and at least one carboxyl group; and (b) 10 to 80 wt.% of a (meth)acrylic copolymer containing a hydroxyl group; and (c) 10 to 60 wt.% of a crosslinking agent; wherein the sum of the wt.% of components (a)-(c) is 100% of the binding agent.