Synthetic rubber with narrow molecular weight distribution,...

Details Synthetic rubber with narrow molecular weight distribution,... Synthetic rubber with narrow molecular weight distribution,...

2011-04-26

2011-04-26

Boykin, Terressa M (Department: 1765)

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

Synthetic resins

From carboxylic acid or derivative thereof

C264S444000, C264S464000, C521S045500, C523S150000, C523S209000, C523S212000, C523S351000, C528S317000, C528S492000, C528S493000, C528S271000, C528S480000

Reexamination Certificate

active

07932346

ABSTRACT:
A novel process is used to prepare synthetic rubbers (B) which feature very narrow molecular weight distribution and a correspondingly low value for the polydispersity index. The preparation process encompasses the treatment of a synthetic rubber with ultrasound, where the resultant synthetic rubber (B) has a lower weight-average molecular weight (Mw) than the synthetic rubber (A) used. The resultant synthetic rubbers (B) have excellent suitability for processing via extruder processes or injection-molding processes.

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European Search Report from co-pending Application EP06025544.5 dated Mar. 29, 2007, 3 pages.
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