Patent · US Expired

Transparent styrol-butadiene block copolymer mixtures

US7064164B2 · kind B2 · utility

6Cited by

8References

17Claims

0Family size

Assignee

BASF SE

Inventors

Konrad Knoll · Mannheim, DE
Philippe Desbois · Maikammer, DE
Hans-Michael Walter · Freinsheim, DE
Michael Ishaque · Mannheim, DE
Till Gerlach · Ludwigshafen, DE
Friederike Osswald · Mannheim, DE

Key dates

Filing date	Nov 19, 2002
Grant date	Jun 20, 2006
Priority date	—
Expiry date	Nov 19, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L53/025
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to mixtures comprising linear block copolymers made from vinylaromatic monomers and from dienes of the structure (I) S1-B1-S2 and (II) S3-B2-S4, where S1 is a block made from vinylaromatic monomers with number-average molar mass Mn in the range from 40,000 to 100,000 g/mol, each of S2, S3 and S4 is a block made from vinylaromatic monomers with number-average molar mass Mn in the range from 5,000 to 20,000 g/mol, each of B1 and B2 is a block made from dienes or a copolymer block made from dienes and from vinylaromatic monomers with numberaverage molar mass Mn in the range from 15,000 to 40,000 g/mol, and the ratio of the block copolymers (I)/(II) is in the range from 0.6 to 2.

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