Process for narrowing short-chain branching distribution in...

Details Process for narrowing short-chain branching distribution in... Process for narrowing short-chain branching distribution in...

2006-12-19

2006-12-19

Choi, Ling-Sui (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S124100, C526S124200, C526S128000, C526S348000, C526S352000, C502S103000, C502S116000

Reexamination Certificate

active

07151145

ABSTRACT:
An improved two-step polymerization process wherein ethylene homopolymer is produced in a first reactor and ethylene copolymer having narrowed short-chain branching distribution is prepared in a second reactor. Narrowed short-chain branching distribution of the copolymer is achieved by including specific silane modifiers in the second reactor.

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patent: WO 2005/005489 (2005-01-01), None
Yau, Wallace, W., et al.: “New Approaches Suing MW-Sensitive Detectors in GCP-TREF for Polyolefin Characterization”Polymer 42(2001) 8947-8958.

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