Coating compounds based on polycondensation and polyaddition...

Details Coating compounds based on polycondensation and polyaddition... Coating compounds based on polycondensation and polyaddition...

C - Chemistry, Metallurgy

09

D

C09D 175/06 (2006.01) C08G 18/40 (2006.01) C08G 18/42 (2006.01) C08G 18/63 (2006.01) C09D 133/02 (2006.01) C09D 151/08 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2087338

- 54 - Coating agents based on hydroxyl-containing polycondensation and polyaddition products and their use Abstract of the Disclosure: The present invention relates to coating agents based on hydroxyl-containing binders and isocyanate- containing crosslinking agents, in which coating agents I.) the binder comprises A1) 5 to 80% by weight of at least one polyester or one alkyd resin having an OH number from 0 to 200 mg of KOH/g and an acid number from 0 to 200 mg of KOH/g, A2) 95 to 20% by weight of at least one polyacrylate having an OH number from 30 to 250 mg of KOH/g and an acid number from 0 to 50 mg of KOH/g, the sum of the weight proportions of components (A1) and (A2) being in each case 100% by weight, and II.) the binder is obtainable from 1.) at least one polycondensation resin whose acid component comprises 5 to 100 mol% of cycloaliphatic polycarboxylic acids and/or esteriflable derivatives thereof, 2.) at least one polyacrylate, at least some of which has been prepared in the presence of the polycondensation resin obtained in the first process step and - 55 - 3.) if desired, at least one further polyaddition and/or one further polycondensation resin.

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