Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1977-11-28
1979-08-07
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525316, 525193, 525342, C08F29704
Patent
active
041637658
ABSTRACT:
Linear and branched teleblock copolymers having the configuration (A--B--C).sub.n Z and their hydrogenated derivatives are disclosed, wherein n is an integer from 2 to 4, Z is the residue of either a polyfunctional coupling agent or a polyfunctional initiator or is a covalent chemical bond when n=2, A is a block of a polymerized monovinylarene monomer having 8 to 16 carbon atoms per monomer unit, B is a block of a polymerized conjugated diene having 4 to 12 carbon atoms per monomer unit in which said polymerized block has on the average at least one hydrocarbyl side chain branch for about every 10 carbon atoms of the polymeric backbone, and C is a low vinly polybutadiene block. The hydrogenated teleblock copolymers have the configuration (A--B'--C').sub.n Z wherein n, Z, and A are as defined above, B' is a hydrogenated block B and C' is hydrogenated block C.
REFERENCES:
patent: 3670054 (1972-06-01), De LaMare
patent: 3700748 (1972-10-01), Winkler
patent: 3753936 (1973-08-01), Marrs
patent: 3823203 (1974-07-01), De LaMare
Michl Paul R.
Phillips Petroleum Company
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