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 .gtoreq.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
C.sub.1 to C.sub.8 monoalcohols, .alpha.,.beta.-unsaturated C.sub.3
C.sub.7 monocarboxylic or dicarboxylic acids or of one or more monoesters
of maleic acid or fumaric acid and C.sub.1 to C.sub.14 monoalchols.