Radiation-reactive phenylbutadiene multiblock copolymers
US5066728A · kind A · utility
12Cited by
1References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Sep 27, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A multiblock copolymer comprising endblocks of phenylbutadiene and an elastomeric midblock of a conjugated diene such as isoprene or butadiene is disclosed. The copolymer is crosslinkable by EB radiation such that the crosslinks are confined primarily to the endblock domains in the polymer with minimal crosslinking occurring in the rubbery matrix. Also disclosed are blends of the copolymers with tackifier resins compatible with the midblock regions. The blends provide a curable PSA having enhanced cohesive strength while maintaining adhesive properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.