Patent · US Expired

Modified polyesters

US6180750A · kind A · utility

2Cited by

2References

9Claims

0Family size

Assignee

Roehm GmbH · DE

Inventors

Michael May · Queen Creek, US
Michael Wicker · Seeheim-Jugenheim, DE

Key dates

Filing date	Jul 20, 1999
Grant date	Jan 30, 2001
Priority date	—
Expiry date	Jul 20, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L67/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention concerns the use of a copolymer comprising (a) between 60 and 98 wt % methylmethacrylate, and (b) between 2 and 40 wt % styrene, and optionally (c) between 0 and 20 wt % maleic acid anhydride, as modifying agents for increasing the melt viscosity for partially crystalline, partially aromatic polyesters, with the exception of polybutylene terephthalate containing intensifier fillers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.