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US 4,902,747 AGranted
Polyarylate molding compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorsRobert J. Kassal, Pallatheri M. Subramanian
Life of this patent
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Abstract
In the instant invention, improved blow moldable polyarylate compositions which yield molded objects having substantially uniform wall thickness throughout are provided by the addition of a small amount of a fibrillatable fluoropolymer resin.
Claims4
A melt blend of a mixture consisting essentially of
- (a) 50-100 parts of a polyarylate derived from at least one dihydric phenol and at least one aromatic dicarboxylic acid;
- (b) 0-50 parts of a polyester derived from at least one aliphatic and/or cycloaliphatic diol and at least one dicarboxylic acid;
- (c) 1-15 parts of an epoxy group containing copolymer consisting of recurring units of the monomer (1) CH.sub.2 .dbd.C(R)COOCH.sub.2 CHCH.sub.2 O wherein R.dbd.H or alkyl of 1-6 carbon atoms, and recurring units of at least one monomer selected from the group consisting of (2) CH.sub.2 .dbd.CHR where R.dbd.H, lower alkyl or phenyl, (3) CH.sub.2 .dbd.C(R1)COOR.sub.2 where R.sub.1 .dbd.H, lower alkyl and R.sub.2 .dbd.alkyl of 1-8 carbons, (4) RCOOCH.dbd.CH.sub.2 where R.dbd. lower alkyl, and (5) CO;
- and
- (d) 0.1-3.0% of a fibrillatable fluoropolymer resin.
2 more elements
Dependencies are inferred from the claim text.