Coalescing aid for high nitrile copolymer latex coatings
AssigneeThe Standard Oil Company
InventorsKenneth E. Samuels, Wayne T. Wiggins
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Abstract
Nitrile barrier resin latexes containing a coalescing agent which (1) is a solvent for the nitrile barrier resin, (2) has a boiling point between 100.degree. and 300.degree. C., and (3) does not azeotrope with water are excellent oxygen barriers and have good chemical resistance when coated on various substrates. Especially effective coalescing agents are selected from the group consisting of dimethyl formamide, dimethyl acetimide, methyl pyrrolidone, dimethyl sulfoxide, glycol carbonate and tetramethylene sulfone.
Claims11
A coating composition comprising a blend of (1) a latex produced by the polymerization of a major proportion of a monounsaturated nitrile and a minor proportion of at least one monovinyl monomer component copolymerizable therewith optionally in the presence of a preformed diene rubber, and (2) a coalescing agent which is (a) a solvent for (1), (b) has a boiling point between 100.degree. and 300.degree. C., and (c) does not azeotrope with water.
A process for preparing a coating comprising blending (1) a latex produced by the polymerization of a major proportion of a monounsaturated nitrile and a minor proportion of at least one monovinyl monomer component copolymerizable therewith in the presence of a preformed diene rubber, and (2) a coalescing agent which is (a) a solvent for (1), (b) has a boiling point between 100.degree. and 300.degree. C., and (c) does not azeotrope with water.
Dependencies are inferred from the claim text.