Rubbery copolymers of 2,3-dimethyl 1,3-butadiene

Details Rubbery copolymers of 2,3-dimethyl 1,3-butadiene Rubbery copolymers of 2,3-dimethyl 1,3-butadiene

1980-02-14

1981-10-13

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...

526337, C08F29702

Patent

active

042949424

ABSTRACT:
There is disclosed copolymers of 2,3-dimethyl-1,3-butadiene with butadiene or isoprene in which the 2,3-dimethyl-1,3-butadiene content ranges from about 20 to about 80 mole percent, characterized in that the microstructure of the 2,3-dimethyl-1,3-butadiene segments range from about 55 to about 65 percent trans-1,4. Also disclosed are copolymers of 2,3-dimethyl-1,3-butadiene with butadiene or isoprene in which the 2,3-dimethyl-1,3-butadiene content ranges from about 20 to about 80 mole percent characterized in that the microstructure of the 2,3-dimethyl-1,3-butadiene segments range from about 40 to about 65 percent trans-1,4 and 1,2 content of said segments does not exceed 20 percent, said copolymers being prepared by bulk polymerization techniques.

REFERENCES:
patent: 3607982 (1971-09-01), Winkler

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