Branched polystyrene production by free radical bulk polymerization
AssigneeThe Dow Chemical Company
InventorsSheila Tinetti, Duane B. Priddy
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Abstract
The present invention is a process for preparing a branched polymer from a vinyl aromatic monomer comprising, copolymerizing the vinyl aromatic monomer with a monomer pair, wherein the monomer pair consists of two different monomers containing functionalities which are substantially nonreactive with each other under the conditions of copolymerization, and heating the copolymer produced to a temperature such that the functionalities react with each other to form branches within the polymer.
Claims12
A process for preparing a branched polymer from a vinyl aromatic monomer, comprising copolymerizing the vinyl aromatic monomer with a monomer pair, wherein the monomer pair consists of two different vinyl monomers containing functionalities which are substantially nonreactive with each other under the conditions of copolymerization, such that one monomer of the monomer pair is a limiting monomer, present at a concentration in ppm of from about 0.3 to 4 times the molecular weight of the limiting monomer, and the other monomer of the monomer pair is present in an amount greater than ten times the concentration of the limiting monomer and heating the copolymer produced to a temperature such that the functionalities react with each other to form branches within the polymer.
Dependencies are inferred from the claim text.