Hydrogenated block copolymer and composition comprising the same
US5206301A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1990 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Jul 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/914
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A hydrogenated block copolymer having a number-average molecular weight of 40,000-700,000, obtained by hydrogenating at least 80% of the olefinic bonds of a block copolymer having in the molecule at least one each of PA0 a polymer block A composed of 90% by weight or more of a vinyl aromatic compound, PA0 a polybutadiene polymer block B having a 1,2-vinyl structure of 30-70%, and PA0 a polybutadiene polymer block C having a 1,2-vinyl structure of less than 30%, in which block copolymer the blocks A, B and C are contained at a specific ratio, or a unit of the block copolymer is bonded, via a coupling agent residue, to at least one polymer block unit of the blocks A, B and C and thereby the polymer molecular chain is extended or branched; and a thermoplastic resin composition comprising the hydrogenated block copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.