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US 7,402,646 B2Granted
Polymerization of diisopropenylbenzene
AssigneeE. I. Du Pont de Nemours and Company
InventorsSteven Dale Ittel, Alexei A. Gridnev
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Abstract
Processes for preparing substantially linear polymers from diisopropenylbenzenes are provided. The polymers are useful in making a variety of products, including coatings, pigment dispersing agents, and stabilizers.
Claims30
A process for preparing a substantially linear polymer of di(isopropenyl)benzene of the formula:
- wherein n is an integer of 2 or greater, comprising:
- a) contacting a reaction mixture of meta-diisopropenylbenzene with a chain transfer catalyst in the presence of a free radical initiator, a hydrogen atom donor, or hydrogen gas to form a reaction mixture;
- b) heating the reaction mixture to a temperature from about 60° C. to about 160° C.;
- c) maintaining the reaction temperature until a conversion of from 70% to 100% is achieved, and
- d) isolating said substantially linear polymer of diisopropenylbenzene.
2 more elements
A substantially linear polymer of meta- di(isopropenyl)benzene,
- wherein n is an integer of 2 or greater.
Dependencies are inferred from the claim text.