Styrene-isoprene three-armed high load bearing capacity block co

Details Styrene-isoprene three-armed high load bearing capacity block co Styrene-isoprene three-armed high load bearing capacity block co

1992-02-28

1993-03-16

Ziegler, Jacob

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

Synthetic resins

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

525 98, 525 99, 525267, 525272, C08L 5302

Patent

active

051945002

ABSTRACT:
An adhesive which contains a tackifying resin and a branched three-armed block copolymer composition comprised of polymeric blocks wherein the molecular weight is from about 180,000 to about 250,000, the polystyrene content is from about 17 to about 23% by weight of the block copolymer composition and the percentage of S-I arms which are load bearing is greater than about 85%.

REFERENCES:
patent: 3239478 (1966-03-01), Harlan, Jr.
patent: 3658740 (1972-04-01), Marrs et al.
patent: 3753936 (1973-08-01), Marrs
patent: 3935338 (1976-01-01), Robertson et al.
"New Anionic Syntheses of Star-Branched Polymers" by R. P. Quirk et al., Polymer Preprints, vol. 29, No. 2, Sep. 1988, American Chemical Society.
"Dilithium Initiators Based on 1,3-bis(1-Phenylethenyl)benzene. Tetrahydrofuran and Lithium sec-Butoxide Effects" by R. P. Quirk et al., Polymer International, vol. 24, No. 4, (1991), pp. 197-206.

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