Diene block polymer and polymer composition
US5134199A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1988 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Nov 23, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A diene block polymer contains (A) a resinous polybutadiene block having a glass transition temperature of -80.degree. C. or less, a crystalline melting point of 30.degree. to 130.degree. C., 80% to 93% of trans units, 5 to 15% of cis units, and 1 to 10% of vinyl units, a molecular weight of 10,000 to 200,000, and a molecular weight distribution Mw/Mn of 1.2 to 4 and (B) a conjugated diene rubbery block having a glass transition temperature of -20.degree. C. or less and either not having a crystalline melting point or having a crystalline melting point of 0.degree. C. or less, wherein the ratio of blocks (A) to blocks (B) is 2 to 80:98 to 20 (ratio by weight), the molecular weight is 20,000 to 500,000, and the molecular weight distribution Mw/Mn is 1.1 to 5 and a polymer composition containing the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.