摘要:
Process for the production of glycidyl (meth)acrylate copolymers with a number-average molar mass (Mn) of 1000 to 6000 g/mol by solvent-free, continuous copolymerisation of glycidyl (meth)acrylate with ethylenically unsaturated monomers, in a reaction vessel with feed and discharge means in the presence of a polyester oligomer, wherein polyester oligomer or a mixture of glycidyl (meth)acrylate copolymer and polyester oligomer is initially introduced in a weight ratio of from 95:5 to 50:50 and the glycidyl (meth)acrylates, further monomers, further polyester oligomer and, optionally, free-radical initiators are added, the addition together with discharge of the copolymers formed being effected in such a way that the residence time required for formation of the desired composition is achieved, and wherein, in the event of the initial introduction of the mixture of glycidyl (meth)acrylate copolymer and polyester oligomer, addition is effected in such a way that the ratio between copolymer and oligomer is maintained.
摘要:
A binder vehicle composition which is suitable for coating media, containing: A) 20 to 77% by weight of one or more binder vehicles based on oligomeric or polymeric polyol compounds with a hydroxyl number of 80 to 300, an acid number of 0 to 30, a number average molecular weight (Mn) of 500 to 10,000, and a glass transition temperature of −20 to +70° C.; B) 77 to 20% by weight of crosslinking agents based on aliphatic and/or cycloaliphatic polyisocyanates; C) 3 to 20% by weight of oligo- or polyesters, which contain carboxyl groups, as catalyst resins, which have an acid number of 210 to 300 mg KOH/g and a number average molecular weight (Mn) of 420 to 3000; and one or more organic solvents and/or water.
摘要翻译:一种适用于涂布介质的粘合剂载体组合物,其包含:A)20至77重量%的基于羟基数为80至300,酸值为0至30的低聚或多聚多元醇化合物的一种或多种粘合剂载体 数均分子量(Mn)为500至10,000,玻璃化转变温度为-20至+ 70℃; B)基于脂族和/或脂环族多异氰酸酯的交联剂为77至20重量%; C )3〜20重量%的含羧基的低聚或聚酯作为催化剂树脂,其酸值为210〜300mg KOH / g,数均分子量(Mn)为420〜3000;以及 一种或多种有机溶剂和/或水。
摘要:
A coating medium suitable for multilayer coatings, containing, as a binder vehicle:______________________________________ A) 10 to 90% by weight of one or more hydroxy-functional (meth)acrylic copolymers, obtained from a1) 20 to 40% by weight of hydroxyalkyl esters of (meth)acrylic acid a2) 10 to 30% by weight of non-functionalised (meth) acrylates a3) 0 to 5% by weight of unsaturated carboyxlic acids a4) 10 to 60% by weight of non-functionalised monomers a5) 0 to 15% by weight of amino-functional monomers, and a6) 0 to 5% by weight of multiply-unsaturated monomers B) 90 to 10% by weight of hydroxy-functional polyesters, C) 0 to 40% by weight of hydroxy-functional binder vehicles D) 5 to 50% by weight of blocked polyisocyanates, E) 5 to 40% by weight of components based on triazine which crosslink with the hydroxyl groups of components A), B) and C) with the formation of ether and/or ester groups, ______________________________________ wherein at least 50% by weight of the (meth)acrylic copolymers, with respect to the total amount of component A), has been produced in the presence of the hydroxy-functional polyesters corresponding to at least 20% by weight of the total amount of component B).
摘要:
Binder composition, coating compositions produced therefrom and use thereof, in particular for multi-layer lacquer coatings. The binder composition contains: A) 25 to 75 wt. % of the reaction product of one or more carboxy-functionalised (meth) acrylic copolymers containing urethane groups and/or of one or more carboxy-functionalised polyesters containing urethane groups, each having an acid value of 30 to 200 mg of KOH/g, with one or more lactones, B) 25 to 75 wt. % of one or more epoxy-functionalised crosslinking agents having at least two epoxy functions per molecule with a number average molecular weight (Mn) of 200 to 10000 g/mol, C) 0 to 60 wt. % of one or more polyols having at least two hydroxyl functions per molecule, D.sub.1) 0 to 20 wt. % of one or more melamine resins, D.sub.2) 0 to 40 wt. % of one or more free or capped polyisocyanates, wherein the sum of the weight percentages of components A), B), C), D.sub.1) and D.sub.2) amounts to 100 wt. %, together with E) 0 to 10 wt. % of one or more catalysts to catalyse the reaction of carboxyl and epoxy groups, relative to the sum of weights of components A) to D.sub.2).
摘要:
A coating compound comprising a binder/crosslinking agent system that comprises 20 wt. % to 80 wt. % of one or more carboxyl-functional components A) and 80 wt. % to 20 wt. % of one or more epoxy-functional (meth)acrylic copolymers B).
摘要:
Coating composition containing a binder/crosslinking agent system, organic solvents, optionally together with pigments and/or extenders and conventional lacquer additives, wherein the binder/crosslinking agent system contains A) 20 to 80 wt. % of carboxy-functional (meth)acrylic copolymers and/or polyesters which are dissolved in the continuous phase of the coating composition, with an acid value of 15 to 300 mg of KOH/g, B) 80 to 20 wt. % of epoxy-functional crosslinking agents, wherein the numerical ratio between the component A) carboxyl groups and the component B) epoxy groups is between 1:1 and 1:3, and the epoxy-functional crosslinking agent B) comprises at least one epoxy-functional crosslinking component B1) which is dissolved in the continuous phase of the coating composition and at least one epoxy-functional component B2) dispersed in the continuous phase of the coating composition, wherein the numerical ratio of the epoxy groups of the crosslinking components B1) and B2) is 10:1 to 1:5 and wherein the organic solvents comprise 0 to 35 wt. % of one or more conventional organic lacquer solvents containing oxygen and 65 to 100 wt. % of one or more conventional lacquer hydrocarbons.
摘要:
A process for the preparation of blocked isocyanates by reaction of free isocyanates under water-free conditions with blocking agents containing acid hydrogen in the presence of basic catalysts, these being one or more alkali hydroxides, particularly lithium hydroxide. The process leads to yellowing-free products with a low alkali content which may be used as cross-linking agents for polyols, particularly in the lacquer sector.
摘要:
Coating composition suitable for use in the production of coatings with a rapidly curable surface containingA) 10-80 wt. % of one or more compounds with on average at least two CH-acid hydrogen atoms,B) 10-80 wt. % of one or more .alpha.,.beta.-unsaturated compounds with at least two identical or different groups of the general formula R.sub.1 R.sub.2 C.dbd.CR.sub.3 --CO-- which are linked together by the residue of a di-or polyhydric alcohol, a di- or polyamine or aminoalcohol, in which R.sub.1, R.sub.2 and R.sub.3 are mutually independently a hydrogen atom or a straight or branched alkyl residue with 1 to 10 carbon atoms, which residue may be olefinically mono- or polyunsaturated and/or may have one or more hydroxyl groups,C) 0-50 wt. % of one or more radically or ionically polymerisable compounds,D) 5-50 wt. % of one or more polyamines with at least two amine functional groups, related to the sum of the weights of A), B) and C, which may be primary and/or secondary and which may be entirely or partially capped, per molecule,E) 0.01-5 wt % related to the sum of the weights of components A), B), C) and D) of a catalyst in the form of one or more Lewis or Bronsted bases, wherein the conjugate acids of the latter have a pKA value of at least 10,F) 0.1 to 10 wt. %, related to the sum of the weights of components A), B), C) and D) of one or more photoinitiators, together with pigments and/or extenders, optionally together with auxiliary substances and additives customary in lacquers and optionally one or more organic solvents and/or water.
摘要:
Coating composition suitable for multilayer lacquering, containing, in addition to organic solvent, anti-sagging agents, optionally pigments, extenders and additives, a binder/crosslinkin agent system containing A) from 20 to 80 wt. % of carboxyl-functional (meth)acrylic copolymers and/or carboxyl-functional polyesters having an acid number of from 20 to 300, B) from 20 to 80 wt. % of epoxy-functional crosslinking agents, the percentages by weight of A) and B) adding up to 100 wt. %. C) from 0 to 30 wt. % of polymer polyol C), based on the sum of the weights of A) and B), E) from 0 to 20 wt. % of further crosslinking agents, based on the sum of the weights of A, B, and C), F) from 0 to 10 wt. % of monoepoxides, based on the sum of the weights of A) and B), and D) as anti-sagging agents, from 0.1 to 3 wt. %, based on the resin solids, of solid, finely divided urea compounds D) which have previously been prepared in the presence of at least a portion of the epoxy-functional crosslinking agent B) and which are insoluble in the coating compositions, all percentages are by weight being based in each case on the solids.
摘要:
This invention relates to non-ionic emulsifiers based on fatty acid esters of polyalkoxylated polyhydric alcohols as fundamental constituents. At least two fundamental constituents are linked to each other by the reaction of hydroxyl groups with a polyisocyanate, with the formation of urethane bonds.