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    Method for controlling enzymatic decomposition of peroxide and products thereof
    3.
    发明专利
    Method for controlling enzymatic decomposition of peroxide and products thereof 未知

    公开(公告)号：AU2009316659B2

    公开(公告)日：2013-06-27

    申请号：AU2009316659

    申请日：2009-11-19

    Applicant: BUCKMAN LABOR INC

    Inventor： LU CHEN ,  WOODWARD JANET

    IPC: D21C5/00 ,  C01B15/037 ,  D21C9/10 ,  D21C9/16

    Abstract: A method is described controlling enzymatic decomposition of peroxide comprising contacting a composition containing a peroxide decomposing enzyme with an aldehyde functional polymer added in an amount effective to control the enzyme. There also is a method described for bleaching cellulose pulp, such as recycled paper pulp or other pulps, with an aldehyde functional polymer introduced in an amount effective to control peroxide decomposing enzymes present in the pulp being bleached. Paper products containing the aldehyde functional polymer used to control peroxide decomposing enzymes in a bleaching treatment of cellulose pulp are also provided.

    HIGH SOLIDS GLYOXALATED POLYACRYLAMIDE
    4.
    发明专利
    HIGH SOLIDS GLYOXALATED POLYACRYLAMIDE 未知

    公开(公告)号：NZ581932A

    公开(公告)日：2012-06-29

    申请号：NZ58193208

    申请日：2008-06-13

    Applicant: BUCKMAN LABOR INC

    Inventor： WARD JAMES DREW ,  LU CHEN

    IPC: C08L101/02 ,  C08F8/28 ,  C08F220/54 ,  C08F220/56 ,  C08F226/04 ,  C08L33/24 ,  C08L33/26 ,  C08L39/00 ,  D21H17/37 ,  D21H17/38 ,  D21H17/45 ,  D21H21/10 ,  D21H21/18 ,  D21H21/20

    Abstract: Disclosed is a glyoxalated polyacrylamide polymer composition comprising a glyoxalated polyacrylamide polymer in an amount of from about 10% to about 30% by weight of said composition, and comprising an aqueous medium, wherein said glyoxalated polyacrylamide polymer is obtained from the reaction between glyoxal and a cationic polyacrylamide base polymer comprising at least about 30% by weight cationic monomer, wherein the cationic polyacrylamide base polymer has a molecular weight ranging from about 3,000 Daltons to about 13,000 Daltons, and wherein the cationic polyacrylamide base polymer comprises from about 70% to about 50% by weight, acrylamide monomer and from about 30% to about 50%, by weight, cationic monomer copolymerizable with said acrylamide monomer. The polymer is used in paper making.

    METHOD FOR CONTROLLING ENZYMATIC DECOMPOSITION OF PEROXIDE AND PRODUCTS THEREOF
    5.
    发明专利
    METHOD FOR CONTROLLING ENZYMATIC DECOMPOSITION OF PEROXIDE AND PRODUCTS THEREOF 未知

    公开(公告)号：CA2743510A1

    公开(公告)日：2010-05-27

    申请号：CA2743510

    申请日：2009-11-19

    Applicant: BUCKMAN LABOR INC

    Inventor： LU CHEN ,  WOODWARD JANET

    IPC: D21C5/00 ,  C01B15/037 ,  D21C9/10 ,  D21C9/16

    Abstract: A method is described controlling enzymatic decomposition of peroxide comprising contacting a composition containing a peroxide decomposing enzyme with an aldehyde functional polymer added in an amount effective to control the enzyme. There also is a method described for bleaching cellulose pulp, such as recycled paper pulp or other pulps, with an aldehyde functional polymer introduced in an amount effective to control peroxide decomposing enzymes present in the pulp being bleached. Paper products containing the aldehyde functional polymer used to control peroxide decomposing enzymes in a bleaching treatment of cellulose pulp are also provided.

    LOW AMIDINE CONTENT POLYVINYLAMINE, COMPOSITIONS CONTAINING SAME AND METHODS
    10.
    发明专利
    LOW AMIDINE CONTENT POLYVINYLAMINE, COMPOSITIONS CONTAINING SAME AND METHODS 未知

    公开(公告)号：NZ589910A

    公开(公告)日：2013-03-28

    申请号：NZ58991009

    申请日：2009-06-18

    Applicant: BUCKMAN LABOR INC

    Inventor： LU CHEN ,  TAN JIAN

    IPC: C08F8/12

    Abstract: The present invention generally relates to low amidine content polyvinylamine in fresh or aged formats, papermaking and paper sizing compositions containing them, and processes for making, providing and using them. Disclosed is a polymer comprising units of N-vinylformamide, vinyl amine, and amidine, wherein the polymer has an age of at least 21 days and an amidine content no greater than about 15 mole per cent, and a vinyl amine content of from 5 mole per cent to 49 mole per cent. Also disclosed is a process for providing vinylamine polymer having low amidine content, comprising: (a) polymerizing N-vinylformamide, and (b) partially hydrolyzing the poly(N-vinylformamide) formed in step (a) under acidic aqueous conditions at a temperature no greater than about 85 degrees C and for a period of time of no greater than about 4 hours to provide a polymer comprising units of N-vinylformamide, vinyl amine, and amidine, wherein the amidine content is no greater than about 15 mole per cent and the polymer having a degree of hydrolysis of no more than about 57 per cent.

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