FOERFARANDE FOER FRAMSTAELLNING AV STAERKELSE-FOSFATESTRAR

摘要

1406414 Paper NATIONAL STARCH & CHEMICAL CORP 26 March 1974 [28 March 1973] 13463/74 Heading D2B [Also in Divisions C2 and C3] Paper sheets having improved pigment retention values are obtained from bleached sulphite pulp in a conventional papermaking process by incorporating into the pulp a starch phosphate ester prepared by reacting a starch base with a substituted imidazole, e.g. the barium or sodium salt of N-phosphonyl-N'- methylimidazolium chloride or with the sodium salt of the phosphonyl derivatives of N-propyl-; N-Benzyl-; N-Vinyl-; 1, 2-Dimethyl-; and N-Allyl-imidazoles.