Abstract:
Non-aqueous, liquid coating compositions which contain at least one epoxy-functional binder A and at least one carboxyl-functional cross-linking resin B, wherein the at least one cross-linking resin B is present as particles having a melting temperature of 40 to 180° C.
Abstract:
Non-aqueous, liquid coating compositions which contain at least one epoxy-functional binder A and at least one carboxyl-functional cross-linking resin B, wherein the at least one cross-linking resin B is present as particles having a melting temperature of 40 to 180° C.
Abstract:
Catalyst compounds for water-based two-component coating compositions include: I) an organo-metal catalyst for a curing reaction between isocyanate groups and functional groups reactive towards isocyanate groups and II) an oligomeric or polymeric binder compound having a glass transition temperature Tg of ≧20° C., measured by DSC (differential scanning calorimetry) at a heating rate of 10 K/min. The glass transition temperature Tg of binder compound II) is above the temperature at which a water-based two-component coating composition comprising the catalyst compound is applied, preferably is at least 10° C., more preferred at least 20° C., above the temperature at which the two-component coating composition is applied.
Abstract:
Non-aqueous, liquid coating compositions which contain at least one hydroxyl-functional component A, at least one hydroxyl-functional polyurethane resin B differing from the at least one component A and at least one crosslinking agent C with groups reactive towards the hydroxyl groups of A and B, wherein the at least one component A is not solid at room temperature and/or is present in dissolved form and wherein the at least one polyurethane resin B is present as particles having a melting temperature of 40 to 180° C.
Abstract:
An aqueous coating composition, comprisingA) at least one water-dilutable hydroxy-functional binder andB) at least one polyisocyanate crosslinking agent with free isocyanate groups,wherein component A) comprises A1) 40-95 wt. % of at least one water-dilutable hydroxy-functional (meth)acrylic copolymer with a hydroxyl value of 60-250 mg of KOH/g and an acid value of 5-50 mg of KOH/g, which is obtained by free-radical copolymerization performed in a non-aqueous phase, wherein the ratio of primary hydroxyl groups to secondary hydroxyl groups in the (meth)acrylate copolymer A1) is 1:0.1 to 1:1.2 and at least 80% of the secondary hydroxyl groups result from reaction products of a monoepoxy ester and an unsaturated acid-functional monomer, and A2) 5-60 wt. % of at least one water-dilutable polyester oligomer, wherein the total of the weight percentages of component A1) and A2) add up to 100 wt. % and wherein the free-radical polymerization for the production of component A1) is performed at least in part in the presence of component A2) and/or wherein component A2) is added during polymerization or after completion of polymerization.
Abstract:
Non-aqueous, liquid coating compositions which contain at least one hydroxyl-functional component A, at least one hydroxyl-functional polyurethane resin B differing from the at least one component A and at least one crosslinking agent C with groups reactive towards the hydroxyl groups of A and B, wherein the at least one component A is not solid at room temperature and/or is present in dissolved form and wherein the at least one polyurethane resin B is present as particles having a melting temperature of 40 to 180° C.
Abstract:
An aqueous coating composition, comprising A) at least one water-dilutable hydroxy-functional binder and B) at least one polyisocyanate crosslinking agent with free isocyanate groups, wherein component A) comprises A1) 40-95 wt. % of at least one water-dilutable hydroxy-functional (meth)acrylic copolymer with a hydroxyl value of 60-250 mg of KOH/g and an acid value of 5-50 mg of KOH/g, which is obtained by free-radical copolymerization performed in a non-aqueous phase, wherein the ratio of primary hydroxyl groups to secondary hydroxyl groups in the (meth)acrylate copolymer A1) is 1:0.1 to 1:1.2 and at least 80% of the secondary hydroxyl groups result from reaction products of a monoepoxy ester and an unsaturated acid-functional monomer, and A2) 5-60 wt. % of at least one water-dilutable polyester oligomer, wherein the total of the weight percentages of component A1) and A2) add up to 100 wt. % and wherein the free-radical polymerization for the production of component A1) is performed at least in part in the presence of component A2) and/or wherein component A2) is added during polymerization or after completion of polymerization.
Abstract:
A process for the production of polyurethane (meth)acrylates, in which a trimer of a (cyclo)aliphatic diisocyanate, 1,6-hexanediisocyanate, a diol component and hydroxy-C2-C4 alkyl (meth)acrylate in the molar ratio 1:x:x:3 are reacted without solvent and without subsequent purification operations, wherein x means any desired value from 1 to 6, wherein the diol component is selected from the group consisting of an individual linear aliphatic alpha,omega C2-C12 diol and a combination of two to four (cyclo)aliphatic diols, wherein in the case of diol combination each of the diols makes up at least 10 mol % of the diols of the diol combination and the diol combination consists to at least 80 mol % of at least one linear aliphatic alpha,omega C2-C12 diol.
Abstract:
Two-component coating compositions include: A) a cross-linkable binder compound having at least one functional group reactive towards isocyanate groups, B) a cross-linking agent having at least one free isocyanate group and C) a catalyst component comprising C1) a catalyst for the for the curing reaction between the functional groups of component A) and the isocyanate groups of component B), the catalyst C1) being an organo-metal compound, and C2) an oligomeric or polymeric binder compound having a glass transition temperature Tg of ≧about 20° C., measured by DSC (differential scanning calorimetry) at a heating rate of 10 K/min. The glass transition temperature Tg of the binder compound C2) is above the temperature at which the two-component coating composition is applied, preferably about 10° C. above the temperature at which the two-component coating composition is applied.
Abstract:
The invention relates to a process for painting substrates comprising the following steps: 1. applying a coating composition to an optionally pre-coated substrate and 2. hardening the applied coating composition, wherein the coating composition comprises: A) at least one binder having functional groups containing active hydrogen, B) at least one polyisocyanate cross-linking agent having free isocyanate groups and C) at least one urethane compound having at least two —O—CO—NH— groups, wherein the urethane compound is substantially free from functional groups which are capable of entering into a cross-linking reaction with components A) and/or B) and wherein the hardening is carried out under conditions such that the component C) does not contribute to the cross-linking of the applied coating composition by chemical reaction.