Process for polymer production

Details Process for polymer production Process for polymer production

Filed on

1987-06-16

Date issued

1988-11-22

Examiner

Morgan, Kriellion

Patent Class

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

SubClass

Synthetic resins

SubSubClass

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

Other Related Categories

5253308, 5253011, 5253331, 5253332, 5253291, 5253293, 525345, 525388, 5253279, 526290, 526291, 526295, 5263314, C08F11416, C08F13601

Type

Patent

Status

active

Patent number

047866900

Description

ABSTRACT:
A process is provided for the production of a polymer of reduced molecular weight by subjecting, in bulk form, a halogenated butyl polymer having at least 75 percent of the unsaturation in the EXO methylene configuration to mastication in an extruder while exposing the masticated polymer to an atmosphere containing ozone. Such reduced molecular weight polymers have an M.sub.n of from about 10,000 to about 40,000 and may be used in caulks and sealants.

REFERENCES:
patent: 3238187 (1966-03-01), Kraus et al.
patent: 3392154 (1968-07-01), Baldwin
Billmeyer, Jr., "Textbook of Polymer Science", pp. 141 & 372.

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