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US 4,582,895 AGranted
Fatty segmented polyester elastomers
AssigneeHenkel Corporation
InventorsDwight E. Peerman, H. Gordon Kanten, Roger A. Lovald
Life of this patent
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Abstract
Fatty, segmented polyester elastomers are provided which are prepared from a mixture having a molar ratio of aromatic to fatty reactants of less than 4:1 and a molar ratio of short-chain diol to long-chain poly(ether) diol reactants of less than 49:1. These elastomers are useful as hot melt adhesives having excellent properties including resistance to embrittlement at low temperatures.
Claims33
A polyester polymer useful as an elastomer comprised of:
- (a) aromatic units having the structure:
- ##STR5## wherein R.sub.1 is an aromatic hydrocarbon radical;
- (b) fatty units having the structure:
- ##STR6## wherein R.sup.2 is a divalent hydrocarbon radical derived from polymeric fat acid or a fatty diacid;
- and wherein R.sup.3 is a divalent hydrocarbon radical derived from a polymeric fat alcohol or a fatty diol;
- (c) short-chain units having the structure:
- ##STR7## wherein R.sup.4 is a divalent hydrocarbon radical derived from a short-chain diol reactant;
- and
- (d) long-chain poly(ether) units having the structure:
- ##STR8## wherein R.sup.5 is a divalent hydrocarbon radical derived from a long-chain poly(ether) diol reactant;
- wherein m,n,p,q and r are integers;
- provided that (i) the sum of m plus n plus p approximately equals the sum of q plus r;
- (ii) the ratio of m to (n plus p) is less than 4:1 and (iii) the ratio of q:r is less than 49:1.
10 more elements
A process for preparing a fatty, segmented polyester elastomer comprising esterifying a mixture comprised of:
- (a) W moles of an aromatic reactant selected from the group of aromatic dicarboxylic acids, alkylesters of aromatic dicarboxylic acids and mixtures thereof;
- (b) X moles of a fatty reactant selected from the group of fatty reactants consisting of (i) polymeric fat acids, (ii) polymeric fat alcohols, (iii) fatty diacids, (iv) fatty diols and (v) mixtures thereof;
- (c) Y moles of a short-chain diol reactant or mixtures thereof;
- and
- (d) Z moles of a long-chain poly(ether) diol reactant or mixtures thereof;
- provided that the ratio of W:X is less than about 4:1 and the ratio of Y:Z is less than about 49:1.
3 more elements
Dependencies are inferred from the claim text.