Patent · US Expired

Flame-retardant composition of polyphenylene ether, polystyrene resin and polyphosphonate

US4350793A · kind A · utility

12Cited by

4References

11Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Manfred Schmidt · Krefeld, DE
Klaus Reinking · Wermelskirchen, DE

Key dates

Filing date	Jan 19, 1981
Grant date	Sep 21, 1982
Priority date	—
Expiry date	Jan 19, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S525/905
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A flame-retardant composition comprising a polyphenylene ether and a polystyrene resin in a weight ratio of between 4:1 to 1:4 in admixture with an aromatic thermoplastic polyphonate having a number average molecular weight of 4,000 to 80,000, said thermoplastic polyphosphonate being present in an amount of 1 to 20 parts by weight per 100 parts by weight of the total mixture.

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