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    • 2. 发明授权
    • Modifying starch with cationic polymers and use of the modified starches as dry-strength agent
    • 用阳离子聚合物改性淀粉,使用改性淀粉作为干强剂
    • US06746542B1
    • 2004-06-08
    • US09926230
    • 2001-09-27
    • Primoz LorencakAndreas StangeKurt DiehlNorbert Mahr
    • Primoz LorencakAndreas StangeKurt DiehlNorbert Mahr
    • C08B3012
    • D21H21/20C08B31/00C08B31/185C08L3/00C08L3/02C08L3/10D21H17/29C08L2666/02
    • A process for modifying starch by heating starch in an aqueous medium to temperatures above the gelatinization temperature of said starch comprises effecting said modifying of said starch in the presence of (a) a polymeric cationizer selected from the group consisting of the polymers containing vinylamine units and having molar masses of up to 1 million, the polyethyleneimines, the polydiallyldimethylammonium chlorides, the condensates of dimethylamine with epichlorohydrin or dichloroalkanes, the condensates of dichloroethane and ammonia, and the mixtures thereof, and (b) polymeric papermaking drainage aids selected from the group consisting of the water-soluble crosslinked polyamidoamines with or without an ethyleneimine graft, the polymers containing acrylamide and/or methacrylamide units and having molar masses of more than 1 million, the polymers containing vinylamine units and having molar masses of more then 1 million, and the mixtures thereof.
    • 通过将水性介质中的淀粉加热至高于所述淀粉糊化温度的温度来改性淀粉的方法包括在(a)聚合阳离子化剂存在下进行所述淀粉的所述改性,所述聚合阳离子化剂选自含有乙烯胺单元的聚合物和 摩尔质量高达100万,聚二烯丙基二甲基氯化铵,二甲基胺与表氯醇或二氯烷烃的缩合物,二氯乙烷和氨的缩合物及其混合物,和(b)聚合物造纸引流助剂,选自 具有或不具有乙烯亚胺接枝的水溶性交联聚酰胺胺的聚合物,含有丙烯酰胺和/或甲基丙烯酰胺单元并且摩尔质量大于100万的聚合物,所述聚合物含有乙烯胺单元并且具有大于100万的摩尔质量, 其混合物。