Resin-forming homogeneous solutions of styrene, maleic anhydride and copolymers thereof
AssigneeGulf Oil Corporation
InventorsWilliam J. Heilman, Frank C. Peterson, Mical C. Renz, Leslie P. Theard
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Abstract
Homogeneous solutions of styrene, maleic anhydride and styrene-maleic anhydride copolymer having a low overall styrene content are prepared. These reactive solutions crosslink with polyfunctional reactants such as diepoxides to form thermoset resins.
Claims10
A homogeneous solution of styrene, maleic anhydride and a styrene-maleic anhydride copolymer comprising a mol ratio of styrene to maleic anhydride of about 1:1 to about 4.5:1, a mol ratio of styrene to maleic anhydride in the said styrene-maleic anhydride copolymer of about 1:1 to about 2:1 and an anhydride equivalent ratio of maleic anhydride to styrene-maleic anhydride copolymer of about 1:2 to about 10:1.
A homogeneous solution comprising styrene and maleic anhydride in a mol ratio of about 2:1 and a styrene-maleic anhydride copolymer having a styrene to maleic anhydride mol ratio of about 2:1 in an amount to result in an anhydride equivalent ratio of said maleic anhydride to said styrene-maleic anhydride of about 1.5:1.
A method of making a homogeneous solution of styrene, maleic anhydride and styrene-maleic anhydride copolymer which comprises dissolving maleic anhydride in styrene at a mol ratio of styrene to maleic anhydride of between about 1:1 and about 4.5:1, and then dissolving an amount of a styrene-maleic anhydride copolymer having a styrene to maleic anhydride mol ratio of between about 1:1 and about 2:1 to produce in said solution an anhydride equivalent ratio of maleic anhydride to the styrene-maleic anhydride copolymer of about 1:2 to about 10:1.
A method of making a homogeneous solution of styrene, maleic anhydride and styrene-maleic anhydride copolymer which comprises concurrently dissolving maleic anhydride and a styrene-maleic anhydride copolymer in styrene, said styrene to maleic anhydride mol ratio being between about 1:1 and about 4.5:1, the styrene to maleic anhydride mol ratio in said styrene-maleic anhydride copolymer being between about 1:1 and about 2:1 and the anhydride equivalent ratio of said maleic anhydride to said styrene-maleic anhydride copolymer being between about 1:2 and about 10:1.
Dependencies are inferred from the claim text.