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US 5,223,592 AGranted
Process for polymerization of itaconic acid
AssigneeRohm and Haas Company
InventorsKathleen A. Hughes, Graham Swift
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Abstract
Polymers of itaconic acid are formed at high conversion by adding completely neutralized monomer solution and initiator solution to a vessel initially containing water at a temperature sufficient for polymerization. These polymers are biodegradable and are most useful as detergent additives, scale inhibitors and removers, sequesterants, yarn sizers, deflocculating agents, de-inking agents, suspending agents and dispersing agents.
Claims8
A process for preparing polymers of salts of itaconic acid comprising:
- (a) adding a monomer solution previously completely neutralized with a water soluble base to a reactor initially charged with water;
- (b) adding thereto under uniform addition rates, an initiator solution comprising 0.5 to 20 percent by weight of active initiator on monomer;
- and
- (c) running the reactor at a temperature from about 80 to 200 degrees centigrade.
1 more element
Dependencies are inferred from the claim text.