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US 3,940,350 AGranted
Moulding compositions based on unsaturated polyesters, copolymerisable vinyl monomers and cellulose esters
AssigneeBayer Aktiengesellschaft
InventorsBernhard Hess, Karl Raichle, Hansjochen Schulz-Walz, Bernd Peltzer, Ludwig Bottenbruch, Leonard Goerden
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Abstract
Polyester masses which are curable with low shrinkage containing non-crystallising unsaturated polyesters having a definite styrene compatibility, copolymerisable vinyl monomers and cellulose acetobutyrate and/or cellulose acetopropionate.
Claims4
A mixture containing
- A. 20-70% by weight of a non-crystallizing polyester which is the condensation product of an .alpha.,.beta.-unsaturated dicarboxylic acid and a polyhydroxy compound and has an acid number between 10 and 100 and a hydroxyl number between 10 and 150,
- B. 20-70% by weight of a copolymerizable vinyl monomer and
- C. 3-30% by weight of cellulose acetobutyrate, cellulose acetopropionate or a mixture thereof,
- said non-crystallizing polyester having
- 1. a styrene compatibility of between 50% by weight and 90% by weight of unsaturated polyester or
- 2.
3 more elements
A moulding or pressing composition containing the mixture of claims.
Dependencies are inferred from the claim text.