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    Crystallizable stereoblock rubbery copolymers
    1.
    发明授权
    Crystallizable stereoblock rubbery copolymers 失效
    可结晶的STEREOBLOCK橡胶共聚物

    公开(公告)号：US3853969A

    公开(公告)日：1974-12-10

    申请号：US6305060

    申请日：1960-10-17

    申请人： US RUBBER CO

    发明人： KONTOS E

    IPC分类号： C08F297/08 ,  C08F15/04

    CPC分类号： C08F297/08

    摘要： This invention relates to a method of making crystallizable stereoblock rubbery copolymers by block polymerization of 1olefins having from 2 to 12 carbon atoms. This involves forming successive and alternating polymeric blocks, one of which is formed by contacting simultaneously ethylene or propylene with a dissimilar 1-olefin having from 3 to 12 carbon atoms with a nonstereospecific catalyst in an inert liquid hydrocarbon solvent at 0*-100*C. The feed is so regulated that the thus formed block is an amorphous non-crystallizable atactic copolymer containing from 100 to 2,000 monomer units and in which the molar ratio of the ethylene or propylene component to the dissimilar 1-olefin is from 20:80 to 80:20. The other polymeric block referred to is formed by contacting a single 1-olefin having from 2 to 12 carbon atoms under the same polymerization conditions, the feed being controlled so that the block thus formed is a crystallizable homopolymer block containing from 20 to 200 monomer units in the case of ethylene and from 200 to 1,000 monomer units in the case of 1-olefins having from 3 to 12 carbon atoms. The nonstereospecific catalyst is an ionic-coordination complex of the Ziegler-type capable of polymerizing alpha-olefins in atactic isomery. This invention also relates to the resulting crystallizable stereoblock rubbery copolymers and vulcanizates thereof. The unvulcanized copolymers are amorphous in the undeformed state and are capable of crystallization upon stretching. They have at least three successive and alternating polymeric blocks as described above.

    摘要翻译： 本发明涉及通过具有2至12个碳原子的1-烯烃的嵌段聚合制备可结晶的立体构型橡胶状共聚物的方法。 这涉及形成连续和交替的聚合物嵌段，其中之一是通过在惰性液体烃溶剂中在0-100℃同时使乙烯或丙烯与具有3至12个碳原子的不同的1-烯烃与非立体有择催化剂接触而形成 进料如此调节，使得如此形成的嵌段是含有100至2,000个单体单元的无定形不可结晶的无规共聚物，其中乙烯或丙烯组分与不同的1-烯烃的摩尔比为20： 80到80:20。 所谓的另一个聚合物嵌段是通过在相同聚合条件下使具有2至12个碳原子的单一1-烯烃接触而形成的，所述进料被控制，使得如此形成的嵌段是含有20-200个单体单元的可结晶的均聚物嵌段 在乙烯的情况下，在具有3至12个碳原子的1-烯烃的情况下为200至1,000个单体单元。 非立体特异性催化剂是能够在无规异构体中聚合α-烯烃的齐格勒型的离子配位络合物。 本发明还涉及所得到的可结晶立体异构橡胶共聚物及其硫化产物。 未硫化的共聚物在未变形状态下是无定形的，并且在拉伸时能够结晶。 它们具有如上所述的至少三个连续和交替的聚合物嵌段。

    Graft copolymer products and method of making same
    3.
    发明授权
    Graft copolymer products and method of making same 失效
    聚酯共聚物产品及其制备方法

    公开(公告)号：US3624183A

    公开(公告)日：1971-11-30

    申请号：US3624183D

    申请日：1966-01-27

    申请人： US RUBBER CO

    发明人： LEACH BENTON R ,  MURRAY ALLAN G

    IPC分类号： C08F279/04 ,  C08F19/08

    CPC分类号： C08F279/04 ,  Y10S525/942 ,  C08F2/22

    摘要： A graft copolymer is prepared by polymerizing monomeric styrene and acrylonitrile in a latex of a synthetic rubbery copolymer of about 90 parts of butadiene and 10 parts of styrene having at least 80 percent gel content. The average particle diameter of the latex is 2,000 to 5,000 angstrom units. From 40 to 55 parts of the monomers are used with correspondingly from 60 to 45 parts of the synthetic rubber. The polymerization is carried at 120*175* F. to a conversion of at least 85 percent of the styrene and acrylonitrile to copolymer. The anionic surface-active emulsifier level during the grafting is maintained at not over 5 parts per 100 parts of rubber and styrene-acrylonitrile copolymer that has been polymerized in the latex until at least 75 percent of the styrene and acrylonitrile monomer mixture to be polymerized in admixture with the synthetic rubber has been converted to polymer. Preferably the rubber latex is prepared by at 100*-170* F. in the presence of 0.1-0.3 part of alkalimetal soap per 100 parts of butadiene and sytrene until 20-50 percent conversion, 1.5-2.3 parts of such soap being added during further conversion. The resulting graft copolymer can be blended, preferably by latex blending, with a separately prepared copolymer resin of 6080 parts of styrene and/or alpha-methyl styrene and correspondingly 40-20 parts of acrylonitrile. Articles formed from the disclosed graft copolymer compositions are characterized by high surface gloss.