Block copolymer composition
US5075377A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Jun 22, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A block copolymer composition comprising PA0 (A) a tri-branched block copolymer (I) having a molecular weight of 150,000 to 450,000 represented by the general formula EQU (A-B).sub.3 X PA0 wherein A represents a polymer block of an aromatic vinyl monomer, B represents a polymer block of a conjugated diene monomer, and X represents a residue of a tri-functional or tetra-functional alkoxysilane coupling agent, and the weight ratio of the polymer block A to the polymer block B is from 10/90 to 30/70, PA0 (B) a di-branched block copolymer (II) having a molecular weight of 100,000 to 300,000 represented by the general formula EQU (C-D).sub.2 Y PA0 wherein C represents a polymer block of an aromatic vinyl monomer, D represents a polymer block of a conjugated diene monomer, and Y represents a residue of a di-functional to tetra-functional coupling agents, and the weight ratio of the polymer block C to the polymer block D is from 10/90 to 30/70, and PA0 (C) a linear diblock copolymer (III) having a molecular weight of 50,000 to 150,000 represented by the general formula EQU E-I PA0 wherein E represents a polymer block of an aromatic vinyl monomer, and I represents an isoprene polymer block…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.