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    Preparing copolymers of vinylpyrrolidone and vinyl acetate
    4.
    发明专利
    Preparing copolymers of vinylpyrrolidone and vinyl acetate 未知

    公开(公告)号：AU7927494A

    公开(公告)日：1995-06-27

    申请号：AU7927494

    申请日：1994-09-29

    Applicant: ISP INVESTMENTS INC

    Inventor： ZHONG YUANZHEN ,  PARIKH HEMANT ,  SMITH TERRY E

    IPC: C08F218/08 ,  C08F226/10 ,  C08F4/34

    Abstract: A process for making homogeneous copolymers of vinylpyrrolidone (VP) and vinyl acetate (VA) which form clear aqueous solutions and have high cloud points. The process involves precharging VP and VA monomers in a predetermined ratio, and then feeding VP and VA at a predetermined rate, the ratio of the components in the initial charge and the feeding rates for the monomer being selected in accordance with the reactivity rates of the monomers towards copolymerization as opposed to homopolymerization.

    5.
    发明专利
    未知

    公开(公告)号：AT118512T

    公开(公告)日：1995-03-15

    申请号：AT90910019

    申请日：1990-06-14

    Applicant: ISP INVESTMENTS INC

    Inventor： SHIH JENN S ,  SMITH TERRY E ,  LOGIN ROBERT B

    IPC: C08F2/06 ,  C08F2/04 ,  C08F6/04 ,  C08F26/06 ,  C08F26/10 ,  C08F220/04 ,  C08F220/10 ,  C08F220/18 ,  C08F222/02 ,  C08F226/06 ,  C08F226/10 ,  C11D3/37

    Abstract: What is described herein is a precipitation polymerization process and terpolymer products produced thereby. Polymerization is carried out in a reaction mixture of a vinyl lactam, e.g. vinyl pyrrolidone or vinyl caprolactam, a polymerizable carboxylic acid, e.g. acrylic acid or methacrylic acid, and a hydrophobic monomer, e.g. lauryl methacrylate, in a predetermined compositional range, in the presence of a polymerization initiator, and in an aliphatic hydrocarbon solvent, particularly a C3-C10 saturated hydrocarbon, which is branched or unbranched, cyclic or acylic, and, preferably, is heptane or cyclohexane. The terpolymers are obtained in high yield, as a white powder, which can be filtered and dried easily.

    7.
    发明专利
    未知

    公开(公告)号：ES2070325T3

    公开(公告)日：1995-06-01

    申请号：ES90910019

    申请日：1990-06-14

    Applicant: ISP INVESTMENTS INC

    Inventor： SHIH JENN S ,  SMITH TERRY E ,  LOGIN ROBERT B

    IPC: C08F2/06 ,  C08F2/04 ,  C08F6/04 ,  C08F26/06 ,  C08F26/10 ,  C08F220/04 ,  C08F220/10 ,  C08F220/18 ,  C08F222/02 ,  C08F226/06 ,  C08F226/10 ,  C11D3/37

    Abstract: What is described herein is a precipitation polymerization process and terpolymer products produced thereby. Polymerization is carried out in a reaction mixture of a vinyl lactam, e.g. vinyl pyrrolidone or vinyl caprolactam, a polymerizable carboxylic acid, e.g. acrylic acid or methacrylic acid, and a hydrophobic monomer, e.g. lauryl methacrylate, in a predetermined compositional range, in the presence of a polymerization initiator, and in an aliphatic hydrocarbon solvent, particularly a C3-C10 saturated hydrocarbon, which is branched or unbranched, cyclic or acylic, and, preferably, is heptane or cyclohexane. The terpolymers are obtained in high yield, as a white powder, which can be filtered and dried easily.

    HYDROLYSIS RESISTANT VINYL LACTAM AMINO ACRYLAMIDE POLYMERS
    10.
    发明专利
    HYDROLYSIS RESISTANT VINYL LACTAM AMINO ACRYLAMIDE POLYMERS 未知

    公开(公告)号：CA1339238C

    公开(公告)日：1997-08-05

    申请号：CA605344

    申请日：1989-07-11

    Applicant: ISP INVESTMENTS INC

    Inventor： SHIH JENN S ,  SMITH TERRY E

    IPC: A61K8/72 ,  A61K8/00 ,  A61K8/81 ,  A61Q5/00 ,  A61Q5/02 ,  A61Q5/06 ,  A61Q5/12 ,  C08F20/52 ,  C08F26/10 ,  C08F220/60 ,  C08F226/06 ,  C08F226/10 ,  A61K7/11

    Abstract: The invention relates to a hydrolysis resistant, high molecular weight polymer represented by the formula (see fig.I) wherein R is alkylene having from 3 to 8 carbon atoms which is optionally substituted with lower alkyl; R1 and R2 are each hydrogen or methyl; wherein R7 and R8 are each alkylene having from 1 to 18 carbon atoms and are optionally substituted with alkyl; the sum of r and t is one or two; R4 and R5 are each independently lower alkyl; R6 is alkyl, aralkyl or alkaryl having from 1 to 8 carbon atoms or N-alkylene lactam having from 3 to 8 carbon atoms: X- is an anion derived from the group of halogen, SO3, SO4, HSO4 and R6SO4; M is a copolymerizable vinyl monomer; n has a value of from 10 to 99 mole %; m has a value of from 1 to 90 mole %; p has a value of from 0 to 20 mole % and the sum of m + n + p is 100; q and q' have the same value which is 0 or 1; s is the reciprocal of the number of negative charges in X; and the total amount of monomer represented by subscript m can be from 1% to 100% quaternized. The invention also relates to a process for the preparation of the polymer containing low residual monomer and to uses of the polymer.

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