Process and product for manufacture of elastomeric co- or terpol

Details Process and product for manufacture of elastomeric co- or terpol Process and product for manufacture of elastomeric co- or terpol

1977-08-25

1979-03-27

Holler, Alan

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

Synthetic resins

Polymerizing in two or more physically distinct zones

526 73, 526309, 526339, C08F 452, C08F21012, C08F23206, C08F23608

Patent

active

041466926

ABSTRACT:
In a process for producing substantially gel free elastomers of isobutylene and a conjugated diene selected from the group consisting of cyclopentadiene, methylcyclopentadiene, isoprene or piperylene and mixtures thereof, improved products, higher catalyst efficiency, high cement concentrations and improved monomer conversions are obtained by the use of staged, or multiple reactors whereby the monomers and/or catalyst feeds may be divided among the reaction zones. The process provides elastomers which are substantially gel free having controlled molecular weight distribution (polydispersity) and high molecular weights at about 8 to about 45 mole % unsaturation.

REFERENCES:
patent: 2643993 (1953-06-01), Tegge
patent: 2974126 (1961-03-01), Kelley
patent: 3071567 (1963-01-01), Kelley
patent: 3349065 (1967-10-01), Kennedy
patent: 4016342 (1977-04-01), Wagensommer
patent: 4029866 (1977-06-01), Kennedy

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