Patent · US Active

Transparent mixtures of linear styrene-butadiene block copolymers

US7470746B2 · kind B2 · utility

4Cited by

10References

20Claims

0Family size

Assignee

BASF SE

Inventors

Konrad Knoll · Mannheim, DE
Daniel Wagner · Bad Dürkheim, DE
Jurgen Koch · Refrath, DE
Peter Merkel · Long Valley, US

Key dates

Filing date	Dec 9, 2005
Grant date	Dec 30, 2008
Priority date	—
Expiry date	Nov 6, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L53/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Mixtures comprising linear block copolymers composed of vinylaromatic monomers and dienes of the structure (I) S1-B1-S2 and (II) B2-S3, where S1 is a block composed of vinylaromatic monomers whose number-average molar mass Mn is in the range from 40 000 to 100 000 g/mol, each of S2 and S3 is a block composed of vinylaromatic monomers whose number-average molar mass Mn is in the range from 5000 to 20 000 g/mol, each of B1 and B2 is one or more blocks composed of dienes or is copolymer blocks composed of dienes and vinylaromatic monomers whose number-average molar mass Mn is in the range from 15 000 to 100 000 g/mol, and the ratio of block copolymers (I)/(II) is in the range from 0.5 to 10, and their use for impact-modification of blends using polystyrene.

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