Preparation of mixtures of high molecular weight polyisobutylene

Details Preparation of mixtures of high molecular weight polyisobutylene Preparation of mixtures of high molecular weight polyisobutylene

1995-09-19

1998-01-27

Weber, Thomas R.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525197, 525240, C08J 320

Patent

active

057123411

ABSTRACT:
Mixtures of high molecular weight polyisobutylene and thermoplastic polymers are prepared in an extruder by a process in which meterable, high molecular weight polyisobutylene is first metered into the extruder and homogenized in at least one kneading stage, heated and subjected to controlled molecular weight degradation and the thermoplastic polymer is then introduced into the polyisobutylene melt by means of a side feed and is subsequently homogenized together with said melt. The novel process is particularly suitable for the preparation of mixtures of high molecualr weight polyisobutylene and polyethylene.

REFERENCES:
patent: 2339958 (1944-01-01), Sparks
patent: 3230288 (1966-01-01), Henderson
patent: 4155655 (1979-05-01), Chiselko et al.
patent: 4352823 (1982-10-01), Cherukuri et al.
patent: 4892911 (1990-01-01), Genske
Ullmann's Encyclopedia, vol. A 21, 4 pp. 555-562, 1992.

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