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US 5,691,430 AGranted
Process for making vinyl ether polymers
AssigneeISP Investments Inc.
InventorsJames A. Dougherty, John G. Mc Kittrick, Raymond Bret Clark
Life of this patent
Estimating the term…
Abstract
A process for polymerizing a vinyl ether monomer which comprises contacting the vinyl ether with an initiator system of silicon dioxide and a one or more metallic oxides.
Claims9
A process for polymerizing a vinyl ether monomer having the formula:
- H.sub.2 C.dbd.CH--OR
- wherein R is an alkyl, cycloalkyl or alkyl substituted cycloalkyl, aromatic or alkyl substituted aromatic and R contains 1 to 20 carbon atoms, to make a homopolymer having a weight average molecular weight of about 200 to about 100,000 and a polydispersity of less than about 5 which comprises contacting the vinyl ether with an initiator system consisting essentially of silicon dioxide and one or more metallic oxides selected from the group consisting of aluminum oxide, magnesium oxide, ferric oxide, and titanium dioxide.
Dependencies are inferred from the claim text.