| 摘要 |
Polyester-polyols with an OH no. of 60-400 (I) comprise the esterification prods. of (a) an alcohol component contg. (a1) a polyol component consisting of 3-8C (cyclo)aliphatic, at least trihydric alcohol(s), (a2) a diol component consisting of 2-18C (cyclo)aliphatic dihydric alcohol(s) and (a3) a mono-ol component consisting of opt. unsatd. 1-18C monohydric (cyclo)aliphatic alcohol(s), with (b) a carboxylic acid component contg. (b1) a diacid component consisting of itaconic or maleic acid, or the corresp. anhydride, and/or fumaric acid, opt. (b2) a diacid component consisting of satd. or unsatd. (cyclo)aliphatic acid(s) or possible anhydride(s) with at least 2 C atoms, other than (b1) and (a3) a mono-acid component consisting of opt. unsatd. 1-18C (cyclo)aliphatic monocarboxylic acid(s) or anhydride(s) thereof. Component (a3) or (b3) is used in amts. of at least 10 mole% w.r.t. the total amt. of (a) or (b) respectively. Also claimed are binder combinations contg. polyols (I) and (cyclo)aliphatic polyisocyanates. |
