Terpolymers of alkyl acrylates or methacrylates, an olefinically unsaturated homo or heterocyclic-nitrogen compound and an allyl acrylate or methacrylate or perfluoroalkyl ethyl acrylates or methacrylates
AssigneeConoco Inc.
InventorHanh T. Le
Life of this patent
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Abstract
Terpolymers having enhanced pour point depressant properties are disclosed which comprise (1) an alkyl ester of unsaturated monocarboxylic acid, (2) an olefinically unsaturated homo or heterocyclic-nitrogen compound, and (3) an allyl acrylate or methacrylate or a perfluoroalkyl ethyl acrylate or methacrylate. A process for preparing the terpolymers is additionally disclosed.
Claims21
An alkyl ester of unsaturated monocarboxylic acid, an olefinically unsaturated homo or heterocryclic-nitrogen compound and allyl acrylate or methacrylate or a perfluoroalkyl ethyl acrylate or methacrylate terpolymer having pour point depressant properties, said terpolymer comprising the reaction product of (a) a monomeric alkyl ester of carboxylic acid or a mixture of alkyl esters of carboxylic acid having the formula:
- ##STR4## wherein R is H or CH.sub.3 and R.sub.1 is alkyl having from about 1 to about 30 carbon atoms;
- (b) vinyl pyridine;
- and (c) allyl acrylate or methacrylate or a perfluoroalkyl ethyl acrylate or methacrylate or a mixture of perfluoroalkyl ethyl acrylates or methacrylates, said perfluoroalkyl ethyl acrylates or methacrylates having the formula:
- ##STR5## wherein R.sub.2 is H or CH.sub.3, and K is an integer of from about 1 to about 20.
A terpolymer having pour point depressant properties which is obtained by free radical polymerization of a monomeric mixture comprising from about 0.01 to about 1.0 mole percent of (a) an alkyl ester of carboxylic acid or a mixture of alkyl esters of carboxylic acid having the formula:
- ##STR6## wherein R is H or CH.sub.3 and R.sub.1 is alkyl having from about 1 to about 30 carbon atoms;
- (b) from about 0.01 to about 0.1 mole percent of vinyl pyridine;
- and (c) from about 0.01 to about 1.0 mole percent of allyl acrylate or methacrylate or a perfluoroalkyl ethyl acrylate or methacrylate or a mixture of perfluoroalkyl ethyl acrylates or methacrylates, said perfluoroalkyl ethyl acrylates or methacrylates having the formula:
- ##STR7## wherein R.sub.2 is H or CH.sub.3 and K is an integer of from about 3 to about 15, said terpolymer having a molecular weight of at least about 1,000.
Dependencies are inferred from the claim text.