Process for the polymerization of mixtures of cis and trans-isom

Details Process for the polymerization of mixtures of cis and trans-isom Process for the polymerization of mixtures of cis and trans-isom

1985-06-26

1986-12-23

Briggs, Sr., Wilbert J.

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

Synthetic resins

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

525271, 525314, C08F29704

Patent

active

046313133

ABSTRACT:
An improved method for the polymerization of mixtures of mixed cis and trans-isomers of 1,3-pentadiene in the production of block copolymers. By continuously or incrementally adding a cis-isomer of 1,3-pentadiene polymerization promoter, using a hydrocarbon solvent with no aprotic solvents of a polar nature and not exceeding specified temperature ranges, the cis-isomer of 1,3-pentadiene is polymerized, resulting in a greater 1,3-pentadiene polymerization yield. The polymerization promoter is a vinyl-substituted aromatic monomer, for example styrene.

REFERENCES:
patent: 3147242 (1964-09-01), Stearns
patent: 4152370 (1979-05-01), Moczygemba

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