Patent ID: 6087469
Filing Date: 2000-07-11
Classification: C08F,C08G,C09D

Abstract:
A low molar mass polyester polyol having a weight-average molar mass M.sub.w of not more than 2000 g/mol, with a hydroxyl number of from 80 to 300 mg/g and an acid number of from 5 to 35 mg/g, comprising mole fractions in % of structural units derived from:a) from 1 to 45% of a aliphatic polycyclic polyhydroxy compound having at least two hydroxyl groups per molecule;b) from 5 to 50% of a branched aliphatic acyclic dihydroxy compound;c) from 30 to 50% of an aliphatic cyclic polycarboxylic acid;d) from 0 to 30% of an aliphatic acyclic or monocyclic polyhydroxy compound having three or more hydroxyl groups per molecule;e) from 0 to 10% of a polyfunctional compound selected from the group consisting of aliphatic linear and monocyclic dihydroxy compounds, aliphatic linear and branched dicarboxylic acids, aromatic dicarboxylic acids and polycarboxylic acids having three or more carboxyl groups per molecule; andf) from 0 to 10% of a monofunctional unit selected from the group consisting of monocarboxylic acids;and monoalcohols, the mole fractions indicated in each case under a), b), c), d), e) and f) adding up to 100%.