Robert Dean Crawford

US Patent:

RE289825, Sep 28, 1976

Filed:

Nov 8, 1974

Appl. No.:

5/522110

Inventors:

Robert W. Crawford - Wilmington DE
William K. Witsiepe - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08L 6702

US Classification:

260873

Abstract:

A uniform blend of about 5-95% by weight vinyl chloride polymer having a tensile modulus of at least about 50,000 p. s. i. and about 95-5% by weight of at least one thermoplastic segmented copolyester. [. polymer. ]. containing (1) about 5-90 weight percent long chain ester units derived from at least one long chain glycol having a molecular weight of about 600-6000 and at least one low molecular weight dicarboxylic acid having a molecular weight less than about 300, and (2) about 10-95 weight percent short chain ester units derived from at least one low molecular weight diol having a molecular weight of less than about 250 and at least one low molecular weight dicarboxylic acid having a molecular weight of less than about 300. These blends exhibit excellent abrasion resistance which is maintained even in the presence of a large amount of plasticizer, improved low temperature flexibility, impact resistance and increased scuff resistance. These blends also exhibit improved processing because of excellent thermal stability and low melt viscosity.