摘要:
Clear lacquer coating media suitable for multi-layer coatings, containing self-crosslinking or externally crosslinkable binder vehicles, organic solvents, and in the case of externally-crosslinkable binder vehicles containing one or more crosslinking agents which are different from aldehyde condensation resins, and optionally also containing one or more reactive thinners and customary additives for clear lacquers, with an additional content of A) 0.1 to 3% by weight one or more urea compounds, and B) 0.05 to 10% by weight one or more substances which supply formaldehyde, with respect in each case to the resin solids content which is formed by the binder vehicles, reactive thinners and crosslinking agents.
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:
Coating compositions suitable for stoved multi-layer coatings containing as binder:A) 20 to 40 wt. % of hydroxy-functional (meth)acrylic copolymer obtainable from styrene and/or styrene derivatives; hydroxyethyl, hydroxypropyl and/or hydroxybutyl (meth)acrylate; non-functionalised (cyclo)alkyl (meth)acrylates having 8 to less than 18 C atoms in the (cyclo)alkyl residue; (meth)acrylic acid and optionally non-functionalised (cyclo)alkyl (meth)acrylates having up to 7 C atoms in the (cyclo)alkyl residue;B) 20 to 40 wt. % of hydroxy-functional (meth)acrylic copolymer obtainable from hydroxyethyl, hydroxypropyl and/or hydroxybutyl (meth)acrylate; non-functionalised (cyclo)alkyl (meth)acrylates having 8 to less than 18 C atoms in the (cyclo)alkyl residue; non-functionalised (cyclo)alkyl (meth)acrylates having up to 7 C atoms in the (cyclo)alkyl residue and (meth)acrylic acid;C) 0 to 40 wt. % of hydroxy-functional binders other than A) and B),D) 10 to 50 wt. % of free or blocked polyisocyanates, andE) 0 to 40 wt. % triazine-based components which crosslink with the hydroxyl groups of components A), B) and optionally C) to form ether and/or ester 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.