Radiation-reactive phenylbutadiene multiblock copolymers

Details Radiation-reactive phenylbutadiene multiblock copolymers Radiation-reactive phenylbutadiene multiblock copolymers

1990-09-27

1991-11-19

McCamish, Marion E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

522149, 522158, C08F29300, C08J 328

Patent

active

050667289

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.

REFERENCES:
patent: 4960831 (1990-10-01), Willis et al.
Chem. Abstracts vol. 82, #6, 31589w Masuda et al. 1974.

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