Patent · US Expired

Oil-resistant, expandable styrene polymers

US5177115A · kind A · utility

3Cited by

4References

3Claims

0Family size

Assignee

BASF SE

Inventors

Hans Hintz · Ludwigshafen, DE
Klaus Hahn · Lampertheim, DE
Uwe Guhr · Havelsee, DE
Michael Riethues · Ludwigshafen, DE

Key dates

Filing date	Nov 20, 1991
Grant date	Jan 5, 1993
Priority date	—
Expiry date	Nov 20, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L25/08
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An oil-resistant, expandable styrene polymer contains PA0 a) from 10 to 90% by weight of uncrosslinked polystyrene and/or an uncrosslinked styrene copolymer containing at least 50% by weight of copolymerized styrene, PA0 b) from 10 to 90% by weight of a crosslinked styrene polymer which contains at least 0.1% by weight, but less than 2% by weight, of a copolymerized monomer having at least two olefinic double bonds, PA0 c) from 1 to 10% by weight, based on the sum of a) and b), of a C.sub.3 - to C.sub.6 -hydrocarbon as blowing agent, and, if desired, PA0 d) conventional additives in effective amounts, the mixture of a) and b) having a melt flow index MFI (200.degree. C., 5.0 kp) in accordance with DIN 53 735 of from 1 to 20 [g/10 min].

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