Polyisobutene composition

Details Polyisobutene composition Polyisobutene composition

2006-05-23

2006-05-23

Lu, Caixia (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S237000, C524S490000

Reexamination Certificate

active

07049383

ABSTRACT:
A polyisobutene composition having a global maximum of the differential molecular weight distribution curve at a molecular weight Mmaxof from 3 500 to 8 000 is described, which comprises at least one local maximum at a molecular weight of from 112 to 560. The isobutene oligomers present act as flow improvers and boiling assistants. They are added to higher molecular weight isobutene polymers, preferably before or in the course of a distillation, for removing unconverted isobutene and/or an inert diluent.

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