Process for producing blends of syndiotactic,...

Details Process for producing blends of syndiotactic,... Process for producing blends of syndiotactic,...

2007-01-23

2011-11-29

Seidleck, James J (Department: 1765)

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

Synthetic resins

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

C525S191000, C525S192000, C152S525000, C152S450000

Reexamination Certificate

active

08067503

ABSTRACT:
Blends of syndiotactic 1,2-polybutadiene and rubbery elastomers are prepared by a process that comprises polymerizing 1,3-butadiene monomer into syndiotactic 1,2-polybutadiene within a rubber cement of an elastomeric terpolymer by using a chromium-based, molybdenum-based, or iron-based catalyst composition. Polymer composition comprising the blend with improved properties is also provided.

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