Polymerizable quaternary ammonium methyl carbonates
AssigneeHoechst Celanese Corporation
InventorsThomas C. Shen, James H. Rea
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Abstract
In one embodiment this invention provides a novel polymerizable quaternary ammonium carbonate corresponding to the formula: ##STR1## In another embodiment this invention provides a novel copolymer of the above represented methacrylamidopropyltrimethylammonium methyl carbonate and acrylamide, which exhibits a high level clay flocculation efficiency.
Claims3
A quaternary ammonium salt corresponding to the formula:
- ##STR4##
A process for producing methacrylamidopropyltrimethylammonium methyl carbonate salt which comprises (1) heating a solution of N-(3-dimethylaminopropyl)methacrylamide and dimethyl carbonate in a molar ratio of 1:1.2-1:2.5 at a temperature of about 85.degree.-120.degree. C. for a period between about 3-12 hours;
- (2) diluting the reaction product medium with water to form an aqueous solution having an organic concentration between about 40-70 weight percent, while maintaining the medium at a temperature between about 60.degree.-100.degree. C. during the water addition period;
- and (3) cooling the medium to ambient temperature to provide an aqueous solution of quaternary ammonium salt product.
Dependencies are inferred from the claim text.