Method of producing a cyclized polydiene

Details Method of producing a cyclized polydiene Method of producing a cyclized polydiene

1985-03-04

1987-07-07

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...

5253331, 5253332, 525371, C08F 848

Patent

active

046788417

ABSTRACT:
A method of producing a cyclized polydiene comprising cyclizing a polydiene in an organic solvent with the aid of a binary catalyst comprising tin halide or titanium halide and an organosulfonic acid or a haloacetic acid. The method provides a cyclized polydiene having a narrow molecular weight distribution in a short reaction time and with high reproducibility. The method does not entail side reactions causing gelation or discoloration.

REFERENCES:
patent: 4085058 (1978-04-01), Adachi et al.
patent: 4248986 (1981-02-01), Lal et al.
Kirk-Othmer Encyclopedia of Chemical Terminology, vol. 10, 2d Ed., (1966), pp. 158-161.

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