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    • 96. 发明授权
    • Method for the secondary cross-linking of hydrogels with N-acyl-2-oxazolidinones
    • 水凝胶与N-酰基-2-恶唑烷酮二次交联的方法
    • US06559239B1
    • 2003-05-06
    • US09831920
    • 2001-05-29
    • Ulrich RiegelMatthias WeismantelVolker FrenzThomas DanielFritz Engelhardt
    • Ulrich RiegelMatthias WeismantelVolker FrenzThomas DanielFritz Engelhardt
    • C08F830
    • C08F8/30C08J3/245C08J2300/14C08J2333/02C08F220/06
    • Liquid-absorbent polymers are prepared by a process for the gel and/or surface postcrosslinking of water-absorbent polymers by the polymer being treated with a surface postcrosslinking solution and being postcrosslinked and dried during and after the treatment by raising the temperature, wherein the surface postcrosslinking solution comprises as crosslinker a compound of the formula I where R1, R2, R3 and R4 are independently hydrogen, C1-C12-alkyl, C1-C12-alkenyl, C6-C12-aryl or C1-C12-alkoxy, R5 is C1-C16-alkyl, C1-C4-hydroxyalkyl, C6-C12-aryl, C1-C16-alkenyl or a group of the formula —(CH2)n—COOH or —(CH2)n—SO3H in the form of the acid or a respective metal salt, ammonium salt or triethanolammonium salt thereof or —(CH2—CH2—O—)m—R6, R6 is hydrogen or C1-C16-alkyl, n is from 1 to 10, m is from 1 to 20 dissolved in an inert solvent, and are used in hygiene articles, packaging materials and nonwovens.
    • 通过用表面后交联溶液处理的聚合物进行凝胶和/或表面后吸附吸水性聚合物的方法制备液体吸收聚合物,并且在处理之间和之后通过升高温度进行后交联和干燥,其中表面 后交联溶液包含作为交联剂的式I化合物,其中R 1,R 2,R 3和R 4独立地是氢,C 1 -C 12 - 烷基,C 1 -C 12 - 烯基,C 6 -C 12 - 芳基或C 1 -C 12 - 烷氧基,R 5是C 1 -C 16 - 烷基,C 1 -C 4 - 羟基烷基,C 6 -C 12 - 芳基,C 1 -C 16 - 烯基或式 - (CH 2)n -COOH或 - (CH 2)n -SO 3 H的基团,其形式为酸或相应的 金属盐,铵盐或三乙醇铵盐或 - (CH 2 -CH 2 -O-)m -R 6,R 6是氢或C 1 -C 16 - 烷基,n为1至10,m为1至20,溶于惰性溶剂 ,用于卫生用品,包装材料和无纺布。