Process for increased peroxide efficiency in controlled rheology

Details Process for increased peroxide efficiency in controlled rheology Process for increased peroxide efficiency in controlled rheology

1995-06-30

1996-06-25

Lipman, Bernard

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

Synthetic resins

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

5253338, 5253339, C08F 850

Patent

active

055300731

ABSTRACT:
This invention relates to a peroxide process for preparation of controlled rheology polypropylene resins wherein 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane is the peroxide and the melt flow rate is increased by the presence of a thioester of the general formula ##STR1## wherein n is a whole number of from 6 to 16.

REFERENCES:
patent: 4552930 (1985-11-01), Hirota et al.
patent: 4578430 (1986-03-01), Davison
patent: 4624993 (1986-11-01), Upadhyaya
patent: 5006608 (1991-04-01), Gardiner et al.
patent: 5231144 (1993-07-01), Yamamoto et al.
patent: 5246779 (1993-09-01), Heimberg et al.

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