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AssigneesMoses Konigsberg, Henry A. Fremont, G. Howard Kingsley
InventorRobert C. Mavis
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The volatile alkali salt of the reaction product of a waxy starch product having a high amylopectin content and styrene-maleic anhydride copolymer and the method of making such product comprising hydrolyzing the copolymer in the presence of the high amylopectin starch product at an elevated temperature and in the presence of water for a time sufficient to hydrolyze the copolymer, disperse the starch in water, and permit the copolymer and starch to react, adding a volatile alkali to the heated mixture, and continuing the heating for a time sufficient to form the volatile alkali salt of said reaction product. The invention also comprises coatings comprising the volatile alkali salt of said reaction product.
The volatile alkali salt of a reaction product in an aqueous medium of a hydrolyzed styrene-maleic anhydride copolymer and a dispersed high amylopectin starch product.
The method of making a reaction product suitable for use in film-forming coating compositions comprising admixing a high amylopectin starch product and a styrene-maleic anhydride copolymer in water, heating at a temperature and for a time sufficient to hydrolyze the copolymer, disperse the starch, and form the reaction product, and thereafter neutralizing the reaction product with a volatile alkali.
The method of making a product suitable for use in film-forming coating compositions comprising admixing a high amylopectin starch product with a styrene-maleic anyhdride copolymer in water at a temperature of from about 160.degree. to 175.degree. F. for a period of about 25 to 45 minutes and thereafter adding ammonium hydroxide in an amount sufficient to give a pH of at least 8.5.
Dependencies are inferred from the claim text.