Title:
COMB-BLOCK HIGH DENSITY POLYETHYLENES AND METHODS OF MAKING THEM
Document Type and Number:
WIPO Patent Application WO/2017/165009
Kind Code:
A8
Abstract:
A process for preparing a polyethylene composition comprising contacting ethylene with a first salan catalyst precursor and an activator to form branched vinyl/vinylidene-terminated high density polyethylene having a number average molecular weight (Mn) of at least 5,000 g/mole; and contacting the branched vinyl/vinylidene-terminated high density polyethylene with ethylene and a second metallocene catalyst precursor and an activator to form a comb-block HDPE. The polyethylene composition comprises a polyethylene backbone, and one or more branched high density polyethylene combs pendant to the backbone, the combs having an Mn of at least 5,000 g/mole, where the polyethylene has a branching index (g') of less than 0.9.
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Inventors:
TSOU ANDY (US)
ATIENZA CRISITA (US)
JIANG PEIJUN (US)
DOUFAS ANTONIOS (US)
LOPEZ-BARRON CARLOS (US)
ATIENZA CRISITA (US)
JIANG PEIJUN (US)
DOUFAS ANTONIOS (US)
LOPEZ-BARRON CARLOS (US)
Application Number:
PCT/US2017/017134
Publication Date:
July 19, 2018
Filing Date:
February 09, 2017
Export Citation:
Assignee:
EXXONMOBIL CHEMICAL PATENTS INC (US)
International Classes:
C08F10/02; C08F2/38; C08F4/64; C08F4/6592; C08L23/06
Attorney, Agent or Firm:
FAULKNER, Kevin, M. et al. (US)
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