Method for producing water-soluble non-turbid copolymer of at least one kind of water-soluble n-vinyl lactam and at least one kind of hydrophobic comonomer
    1.
    发明专利
    Method for producing water-soluble non-turbid copolymer of at least one kind of water-soluble n-vinyl lactam and at least one kind of hydrophobic comonomer 审中-公开
    用于生产最少一种水溶性N-乙烯基乳酸和至少一种疏水性的可溶性非涡旋共聚物的方法

    公开(公告)号:JP2007169650A

    公开(公告)日:2007-07-05

    申请号:JP2006345245

    申请日:2006-12-22

    CPC classification number: C08F226/10 C08F218/08

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a water-soluble copolymer of at least one kind of water-soluble N-vinyl lactam and at least one kind of hydrophobic comonomer by the radical polymerization of the monomers in an organic solvent. SOLUTION: A vinyl lactam copolymer is produced by the radical polymerization of at least one kind of water-soluble N-vinyl lactam and at least one kind of hydrophobic comonomer in an organic solvent in the presence of an initiator under refluxing condition. In the above method, a part of the solvent is distilled off after converting 90-99 wt.% of the used vinyl lactam and the polymerization is continued. COPYRIGHT: (C)2007,JPO&INPIT

    Abstract translation: 待解决的问题:提供通过单体在有机物中的自由基聚合制备至少一种水溶性N-乙烯基内酰胺和至少一种疏水性共聚单体的水溶性共聚物的方法 溶剂。 解决方案:在回流条件下,在引发剂存在下,通过至少一种水溶性N-乙烯基内酰胺和至少一种疏水性共聚单体在有机溶剂中的自由基聚合制备乙烯基内酰胺共聚物。 在上述方法中,在转化90-99重量%的乙烯基内酰胺后,蒸馏出一部分溶剂,并继续聚合。 版权所有(C)2007,JPO&INPIT

    9.
    发明专利
    未知

    公开(公告)号:AT359254T

    公开(公告)日:2007-05-15

    申请号:AT04739502

    申请日:2004-06-02

    Applicant: BASF AG

    Abstract: The invention is a process for preparing tetraalkyl-substituted biphenol which comprises reacting a 2,4- or 2,6-dialkyl substituted phenol in which the alkyl groups contain 1 to 6 carbon atoms with a peroxidase enzyme in the presence of a peroxide in an aqueous medium to yield a tetraalkyl-substituted biphenol by oxidative coupling of the 2,4- or 2,6-dialkyl substituted phenol, or yielding a tetra-alkyl substituted quinone, and reducing the quinone to obtain a tetraalkyl-substituted biphenol. The invention further includes a process for preparing a tetraaryl-substituted biphenol in which the aryl groups contain 6 to 10 carbon atoms which comprises racting a 2,4 or 2,6 diarylphenol with a peroxidase enzyme to yield a tetraaryl-substituted biphenol. A process for reducing a tetraalkyl-substituted quinone to corresponding tetraalkyl-substituted biphenol which comprises reducing the quinone with a phenol in an aqueous medium at a temperature of about 60° to 120° C. is also included.

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