High-solids binder combinations for scratch-resistant topcoats

Details High-solids binder combinations for scratch-resistant topcoats High-solids binder combinations for scratch-resistant topcoats

C - Chemistry, Metallurgy

08

L

C08L 33/08 (2006.01) C08G 18/40 (2006.01) C08G 18/42 (2006.01) C08G 18/62 (2006.01) C08L 25/04 (2006.01) C08L 33/12 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2467354

High-solids binder combinations comprising polyisocyanates, special lactone- based polyols and polyacrylate-polyols, a process for preparing such binders, and their use for producing coatings. The lactone-based polyols include .epsilon.-caprolactone-based polyols having an average hydroxy functionality >= 2 and a number-average molecular weight of from 119 to 2000 g/mol. The polyacrylate resins are prepared by copolymerizing optionally functional polybutadienes, aromatic monomers, hydroxyalkyl esters of acrylic or methacrylic acid having primary hydroxyl groups, aliphatic esters of acrylic or methacrylic acid and C1 to C8 monoalcohols, .alpha.,.beta.-unsaturated C3 - C7 monocarboxylic or dicarboxylic acids or of one or more monoesters of maleic acid or fumaric acid and C1 to C14 monoalchols.

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