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    1.
    发明专利
    未知

    公开(公告)号：IT1201961B

    公开(公告)日：1989-02-02

    申请号：IT1905583

    申请日：1983-01-11

    Applicant: CASSELLA AG ,  HOECHST AG ,  DRESSER IND

    Inventor： UHL KLAUS ,  BANNERMAN JAMES K ,  ENGELHARDT FRIEDRICH ,  PATEL ARVIND

    IPC: C08F220/26 ,  C08F20/00 ,  C08F20/52 ,  C08F26/00 ,  C08F220/56 ,  C08F220/58 ,  C08F226/02 ,  C08F226/06 ,  C08F246/00 ,  C09K8/035 ,  C08F

    Abstract: Auxiliary agents for chemical flooding of petroleum deposits and auxiliary agents used in well drilling fluids are water-soluble copolymers containing a statistical distribution of (a) 5 to 95% by weight of structural units of formula I (I) (b) 0 to 30% by weight of structural units of formula II (II) (c) 0 to 80% by weight of structural units of formula III (III) (d) 5 to 60% by weight of structural units of formula IV (IV) wherein R1 and R2 are the same or different and represent hydrogen, methyl, or ethyl or together are trimethylene to cyclic pentamethylene; R3 represents hydrogen or methyl; R4 represent a imidazolyl-(1) or imidazolyl-(2) moiety; Y is a single covalent bond or the formula -CO-NH-C(CH3)2-CH2-; and X+ is a cation.

    3.
    发明专利
    未知

    公开(公告)号：NO833078L

    公开(公告)日：1983-08-26

    申请号：NO833078

    申请日：1983-08-26

    Applicant: CASSELLA AG ,  HOECHST AG ,  DRESSER IND

    Inventor： UHL KLAUS ,  ENGELHARDT FRIEDRICH ,  BANNERMANN JAMES K ,  PATEL ARVIND

    IPC: C08F20/00 ,  C08F220/26 ,  C08F20/52 ,  C08F26/00 ,  C08F220/56 ,  C08F220/58 ,  C08F226/02 ,  C08F226/06 ,  C08F246/00 ,  C09K8/035 ,  C08F

    Abstract: Auxiliary agents for chemical flooding of petroleum deposits and auxiliary agents used in well drilling fluids are water-soluble copolymers containing a statistical distribution of (a) 5 to 95% by weight of structural units of formula I (I) (b) 0 to 30% by weight of structural units of formula II (II) (c) 0 to 80% by weight of structural units of formula III (III) (d) 5 to 60% by weight of structural units of formula IV (IV) wherein R1 and R2 are the same or different and represent hydrogen, methyl, or ethyl or together are trimethylene to cyclic pentamethylene; R3 represents hydrogen or methyl; R4 represent a imidazolyl-(1) or imidazolyl-(2) moiety; Y is a single covalent bond or the formula -CO-NH-C(CH3)2-CH2-; and X+ is a cation.

    WATER SOLUBLE COPOLYMERS AND THEIR USE AS DISPERSING AGENTS
    8.
    发明专利
    WATER SOLUBLE COPOLYMERS AND THEIR USE AS DISPERSING AGENTS 未知

    公开(公告)号：AU3452884A

    公开(公告)日：1985-04-26

    申请号：AU3452884

    申请日：1984-10-19

    Applicant: HOECHST AG

    Inventor： HILLE MARTIN ,  FRIEDE WOLFGANG ,  WITTKUS HEINZ ,  ENGELHARDT FRIEDRICH ,  RIEGEL ULRICH

    IPC: C08F220/00 ,  C04B24/16 ,  C04B24/26 ,  C08F20/00 ,  C08F20/52 ,  C08F26/00 ,  C08F26/02 ,  C08F220/04 ,  C08F220/06 ,  C08F220/54 ,  C08F220/58 ,  C08F226/02 ,  C08F228/02 ,  C08F246/00 ,  C09K8/24 ,  C09K8/46

    Abstract: For the Contracting states BE, CH, DE, FR, GB, IT, LI, NL 1. A copolymer consisting of-9-95 % by weight of (meth)acrylic acid or ammonium or alkali metal salts thereof or partly hydrolysed (meth)acrylamide and of 5-95 % by weight of groups of the formula II, III or IV see diagramm : EP0141327,P6,F1 in which R**3 denotes hydrogen, C1 -C6 -alkyl or phenyl, R**4 denotes a hydrogen atom or CH3 , and R**5 denotes C1 -C10 -alkylene and K**+ denotes ammonium, lithium, sodium or potassium For the Contracting state AT 1. A process for the preparation of a copolymer consisting of 5-95 % by weight of (meth)acrylic acid or ammonium or alkali metal salts thereof or partly hydrolysed (meth)acrylamide and of 5-95 % by weight of groups of the formula II, III ou IV see diagramm : EP0141327,P6,F1 in which R**3 denotes hydrogen, C1 -C6 -alkyl or phenyl, R**4 denotes a hydrogen atom or CH3 , and R**5 denotes C1 -C10 -alkylene and K**+ denotes ammonium, lithium, sodium or potassium, characterized in that (meth)acrylic acid or ammonium or alkali metal salts thereof partly hydrolysed (meth)-acrylamide and the definitely unsaturated monomers on which the formulae II-IV are based are polymerized in the stated proportions.

    9.
    发明专利
    未知

    公开(公告)号：NO844203L

    公开(公告)日：1985-04-23

    申请号：NO844203

    申请日：1984-10-19

    Applicant: HOECHST AG

    Inventor： HILLE MARTIN ,  FRIEDE WOLFGANG ,  WITTKUS HEINZ ,  RIEGEL ULRICH ,  ENGELHARDT FRIEDRICH

    IPC: C08F220/00 ,  C04B24/16 ,  C04B24/26 ,  C08F20/00 ,  C08F20/52 ,  C08F26/00 ,  C08F26/02 ,  C08F220/04 ,  C08F220/06 ,  C08F220/54 ,  C08F220/58 ,  C08F226/02 ,  C08F228/02 ,  C08F246/00 ,  C09K8/24 ,  C09K8/46 ,  C08F

    Abstract: For the Contracting states BE, CH, DE, FR, GB, IT, LI, NL 1. A copolymer consisting of-9-95 % by weight of (meth)acrylic acid or ammonium or alkali metal salts thereof or partly hydrolysed (meth)acrylamide and of 5-95 % by weight of groups of the formula II, III or IV see diagramm : EP0141327,P6,F1 in which R**3 denotes hydrogen, C1 -C6 -alkyl or phenyl, R**4 denotes a hydrogen atom or CH3 , and R**5 denotes C1 -C10 -alkylene and K**+ denotes ammonium, lithium, sodium or potassium For the Contracting state AT 1. A process for the preparation of a copolymer consisting of 5-95 % by weight of (meth)acrylic acid or ammonium or alkali metal salts thereof or partly hydrolysed (meth)acrylamide and of 5-95 % by weight of groups of the formula II, III ou IV see diagramm : EP0141327,P6,F1 in which R**3 denotes hydrogen, C1 -C6 -alkyl or phenyl, R**4 denotes a hydrogen atom or CH3 , and R**5 denotes C1 -C10 -alkylene and K**+ denotes ammonium, lithium, sodium or potassium, characterized in that (meth)acrylic acid or ammonium or alkali metal salts thereof partly hydrolysed (meth)-acrylamide and the definitely unsaturated monomers on which the formulae II-IV are based are polymerized in the stated proportions.

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