Controlled degradation or cracking of alpha-olefin polymers

Details Controlled degradation or cracking of alpha-olefin polymers Controlled degradation or cracking of alpha-olefin polymers

1984-12-19

1986-03-25

Schofer, Joseph L.

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

Synthetic resins

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

5253338, C08J 712

Patent

active

045784302

ABSTRACT:
An improved process for the controlled reduction of average molecular weight and alteration of molecular weight distribution of C.sub.3 -C.sub.8 alpha-monoolefin homopolymers or copolymers comprises adding a peroxide continuously at a programmed cyclic rate to the polymer or copolymer and heating the mixture in a melt extruder. The rate of peroxide addition is varied at a frequency with a period longer than the decomposition time of the peroxide but shorter than the passage time of the mixture through the extruder, so as to achieve combinations of melt flow and molecular weight distribution for the polymer not possible with prior art steady rates of addition.

REFERENCES:
patent: 3144436 (1964-08-01), Greene et al.
patent: 3862265 (1975-01-01), Steinkamp et al.
patent: 3887534 (1975-06-01), Baba et al.
patent: 3898209 (1975-08-01), Watson et al.
patent: 3940379 (1976-02-01), Castagna et al.
patent: 4001172 (1977-01-01), Steinkamp et al.
patent: 4060569 (1977-11-01), Woods et al.
patent: 4061694 (1977-12-01), Castagna
patent: 4087486 (1978-05-01), Fielding et al.
patent: 4224204 (1980-09-01), Nichols et al.
patent: 4239546 (1980-12-01), Russell et al.
patent: 4359495 (1982-11-01), Schroeder et al.
patent: 4375531 (1983-03-01), Ross
patent: 4387185 (1983-06-01), Schroeder et al.
patent: 4387451 (1983-06-01), Wilcox

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