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819 条记录 (耗时 0.026 秒)

    POLYMER LATEX FOR THE PREPARATION OF AN ELASTOMERIC FILM HAVING EXCELLENT STRESS RETENTION PROPERTIES AND SOFTNESS
    12.
    发明申请
    POLYMER LATEX FOR THE PREPARATION OF AN ELASTOMERIC FILM HAVING EXCELLENT STRESS RETENTION PROPERTIES AND SOFTNESS 有权

    公开(公告)号：US20220332871A1

    公开(公告)日：2022-10-20

    申请号：US17760670

    申请日：2020-09-18

    申请人： Synthomer Sdn. Bhd.

    发明人： Zhenli Wei ,  Yi-Fan Goh ,  Zuraida Mohamad

    IPC分类号： C08F236/06 ,  C08F2/22 ,  C08F212/10 ,  C08F220/44 ,  C08F220/06 ,  C08F236/10

    摘要： A polymer latex is described for the preparation of an elastomeric film obtained by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising: a) 15 to 99 wt.-% of conjugated dienes; b) 0 to 80 wt.-% of ethylenically unsaturated nitrile compounds; c) 0 to 70 wt.-% of vinyl aromatic monomers; the sum of ethylenically unsaturated nitrile compounds b) and vinyl aromatic monomers c) being 0.95 to 84.95 wt.-% d) 0.05 to 10 wt.-% of ethylenically unsaturated acids wherein the ethylenically unsaturated acids comprise d1) an ethylenically unsaturated acid comprising an acid functional group; and a spacer group separating the ethylenically unsaturated group and the acid functional group by at least 4 atoms; and e) 0 to 65 wt.-% of co-polymerizable ethylenically unsaturated compounds, wherein monomers a) to e) are as defined.

    Method for producing carboxylated nitrile rubber
    16.
    发明授权
    Method for producing carboxylated nitrile rubber 有权

    公开(公告)号：US11198750B2

    公开(公告)日：2021-12-14

    申请号：US16494971

    申请日：2018-03-16

    申请人： ZEON CORPORATION

    发明人： Tsutomu Yoshimura

    IPC分类号： C08F236/12 ,  C08F220/44 ,  C08F236/06 ,  C08F220/06 ,  C08F2/38 ,  C08F6/22 ,  C08K5/08

    摘要： A method for producing a carboxyl group-containing nitrile rubber including the steps of: polymerizing a monomer mixture including an α,β-ethylenically unsaturated nitrile monomer and a carboxyl group-containing monomer in a solvent; terminating a polymerization reaction by adding a nitrous acid salt and a water-insoluble hydroquinone as polymerization terminators to the polymerization system, thereby obtaining a dispersion of the carboxyl group-containing nitrile rubber having a pH of 7 or below; and coagulating the dispersion of the carboxyl group-containing nitrile rubber, thereby obtaining the carboxyl group-containing nitrile rubber in the solid state, wherein the amount of the nitrous acid salt to be used is 0.15 parts by weight or less relative to 100 parts by weight of the monomer mixture used in the polymerization reaction.

    MULTIBLOCK COPOLYMER AND METHOD OF MAKING THEREOF
    18.
    发明申请
    MULTIBLOCK COPOLYMER AND METHOD OF MAKING THEREOF 有权

    公开(公告)号：US20210324124A1

    公开(公告)日：2021-10-21

    申请号：US17354318

    申请日：2021-06-22

    申请人： IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.

    发明人： Nacu HERNANDEZ ,  Eric W. COCHRAN ,  Ronald Christopher WILLIAMS ,  Austin HOHMANN

    IPC分类号： C08F220/68 ,  C08F220/44 ,  C08F293/00 ,  C08K5/00 ,  C08L95/00 ,  C09K8/88 ,  C08F220/20 ,  C09J153/00 ,  C09K8/68

    摘要： The present invention relates to a method of preparing a multiblock copolymer. This method comprises i) providing a block copolymer comprising at least one PA block and at least one PB block, where PA represents a polymer block comprising one or more units of monomer A and PB represents a polymer block comprising one or more units of monomer B, with monomers A and B being the same or different, where the block copolymer contains a chain transfer agent moiety (CTA); ii) providing a radically polymerizable monomer C; and iii) polymerizing the block copolymer with monomer C under conditions effective to achieve a number average degree of polymerization (Nn) for the multiblock copolymer of up to 100,000 without gelation. The present invention relates to a multiblock copolymer comprising at least one PA block, at least one PB block, and at least one PC block. PC block is positioned between PA block and PB block, where PC block is a rubber block, and where PA represents a polymer block comprising one or more units of monomer A, PB represents a polymer block comprising one or more units of monomer B, and PC represents a polymer block comprising one or more units of monomer C, with monomers A and B being the same or different.

    METHOD AND SYSTEM FOR PRODUCING A POLYMER
    19.
    发明申请
    METHOD AND SYSTEM FOR PRODUCING A POLYMER 有权

    公开(公告)号：US20210284760A1

    公开(公告)日：2021-09-16

    申请号：US16338848

    申请日：2017-10-02

    申请人： INEOS STYROLUTION GROUP GMBH

    发明人： Wolfgang FISCHER ,  Peter ITTEMANN ,  Florian PATCAS ,  Michael RUF

    IPC分类号： C08F2/01 ,  C08F2/06 ,  C08F212/10 ,  C08F220/14 ,  C08F220/44 ,  C08F2/34

    摘要： A method for producing a polymer from a first component and a second component using a reactor (50) offers technical advantages, wherein reaction heat produced in the reactor (50) is discharged via a boiling cooler (40) by supplying gaseous vapors produced in the reactor (50) to the boiling cooler (40). A product flow containing condensed vapors is returned to the reactor (50) from the boiling cooler (40) via a separation vessel (60), and an aqueous phase is separated from the product flow in the separation vessel (60). A system is provided for producing a polymer from a first component and a second component, comprising a reactor (50) and a boiling cooler (40) for discharging reaction heat produced in the reactor (50). A separation vessel (60) is arranged between the boiling cooler (40) and the reactor (50) such that a product flow containing condensed vapors is returned to the reactor (50) from the boiling cooler (40) via the separation vessel (60).