Branched block copolymer, procedures for its preparation and use

Details Branched block copolymer, procedures for its preparation and use Branched block copolymer, procedures for its preparation and use

1993-04-07

1995-03-07

Kight, III, John

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

Synthetic resins

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

C08F29704

Patent

active

053958942

ABSTRACT:
A branched block copolymer is described, which can be defined by the formula (B.sub.1 -T-A-B.sub.2).sub.n X, where B.sub.1, and B.sub.2 are polydiene blocks, A is an aromatic polyvinyl block, T is a random copolymer segment made up of dienic monomeric and aromatic vinyl units, X is a coupling radical having a valence equal to n, and n is a whole number ranging from 3 to 20. This kind of block copolymer is used in formulations of adhesives having an excellent balance of adhesive, cohesive, rheological characteristics, as well as resistance to heat oxidation, and in compositions together with thermoplastic polymers capable of giving products with improved shock resistance and transparency.

REFERENCES:
patent: 3670054 (1972-06-01), DeLaMare et al.
patent: 4153647 (1979-05-01), Glukhouskoi et al.
patent: 4248984 (1981-02-01), Bi et al.
patent: 4291139 (1981-09-01), Halasa et al.
patent: 4417029 (1983-11-01), Milkovich
patent: 4524184 (1985-06-01), Murray
patent: 4874821 (1989-10-01), Agostinis et al.
patent: 5079296 (1992-01-01), Thompson et al.
WPIL, 87-139969 & JP-A-62-079211, Apr. 11, 1987.

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