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US 3,933,757 AGranted
Dicyclopentadiene thermosetting polyester
AssigneeSCM Corporation
InventorsIvor Pratt, Ulrich Boschert
Life of this patent
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Abstract
The invention pertains to a dicyclopentadiene modified thermosetting polyester polymer wherein dicyclopentadiene is preferentially esterified in the polymer chain. The dicyclopentadiene polyester polymer is mixed with an ethylenically unsaturated monomer to provide thermosetting polyester resin.
Claims4
A method of synthesizing a thermosetting dicyclopentadiene terminated polyester from glycol, dicarboxylic acid, and dicyclopentadiene, said polyester suitable for mixing with sytrene to provide a thermosettable polyester resin, the improvement comprising:
- reacting an excess molar equivalent of dicarboxylic acid with glycol to produce an acid terminated partial polymer having carboxyl groups;
- reacting about 0.1-0.4 mols of dicyclopentadiene per mol of unsaturated dicarboxylic acid with said acid terminated partial polymer at temperatures between about 290.degree.- 310.degree.F. until substantially all of said dicyclopentadiene is esterified with said carboxyl groups.
Dependencies are inferred from the claim text.