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    • 6. 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。
    • 10. 发明授权
    • Well cementing aids
    • 固井助剂
    • US06277900B1
    • 2001-08-21
    • US09196668
    • 1998-11-19
    • Reinhard OswaldVolker FrenzJuergen TonhauserAranka TardiPierre MaroyFlorence L'Alloret
    • Reinhard OswaldVolker FrenzJuergen TonhauserAranka TardiPierre MaroyFlorence L'Alloret
    • C09K700
    • C09K8/46C04B24/163C04B28/02C08F220/54C08F220/58C04B22/0026
    • The present invention relates to copolymers consisting of (a) 1-99% by weight of structural units of the formula (1)  where R1 is hydrogen or methyl, R4 is C1-C22-alkylene, R5 is C1-C22-alkyl or hydrogen, and X is ammonium, lithium, sodium, potassium, an amine or a mixture of these substances, and (b) 99-1% by weight of structural units of the formula (2)  where R1 is hydrogen or methyl, R2 and R3, independently of one another, are hydrogen, or C2-C22-alkyl, wherein component b) is not hydrolysed and the copolymers have been prepared by a solution precipitation polymerization in a nonaqueous solvent or a water-miscible, organic solvent having a low water content which is a precipitant for the copolymer. The invention furthermore relates to a process for cementing subterranean wells using a cement slurry comprising the following components: a) water of various salinity cement a novel copolymer in a concentration of 0.01-5% bwoc, preferably from 0.05 to 0.9% bwoc.
    • 本发明涉及由(a)1-99重量%的式(1)结构单元,其中R 1是氢或甲基,R 4是C 1 -C 22 - 亚烷基,R 5是C 1 -C 22 - 烷基或氢 ,和X是铵,锂,钠,钾,胺或这些物质的混合物,和(b)99-1重量%的式(2)的结构单元,其中R 1是氢或甲基,R 2和R 3 彼此独立地为氢或C 2 -C 22 - 烷基,其中组分b)未水解,并且该共聚物通过在非水溶剂或具有低水的水混溶性有机溶剂中的溶液沉淀聚合制备 作为共聚物的沉淀剂的含量。 本发明还涉及一种使用包含以下组分的水泥浆料固井地下井的方法:a)浓度为0.01-5%bwoc,优选0.05-0.9%bwoc的各种盐酸盐型新型共聚物的水。