Comb polymers having a halobutyl rubber backbone
    6.
    发明授权
    Comb polymers having a halobutyl rubber backbone 失效
    具有卤代丁基橡胶主链的梳理聚合物

    公开(公告)号:US5221716A

    公开(公告)日:1993-06-22

    申请号:US749787

    申请日:1991-08-26

    IPC分类号: C08G81/02

    CPC分类号: C08G81/021

    摘要: The subject invention relates to comb polymers having a halobutyl rubber backbone and to techniques for synthesizing such polymers. The comb polymers of this invention can be thermoplastic elastomers. For instance, halobutyl rubbers having sidechains which are derived from vinyl aromatic monomers are thermoplastic elastomers which can be made by a technique of the subject invention. Such thermoplastic elastomers typically have a chlorobutyl rubber backbone and side chains which are comprised of polystyrene. The subject invention more specifically discloses a process for grafting a lithium terminated vinyl aromatic polymer onto a halobutyl rubber which comprises: (1) capping the lithium terminated vinyl aromatic polymer with a diene monomer to produce a lithium terminated diene capped vinyl aromatic polymer, and (2) reacting the lithium terminated diene capped vinyl aromatic polymer with the halobutyl rubber to produce a halobutyl rubber having vinyl aromatic sidechains grafted thereto.

    摘要翻译: 本发明涉及具有卤代丁基橡胶骨架的梳形聚合物和用于合成这种聚合物的技术。 本发明的梳状聚合物可以是热塑性弹性体。 例如,具有衍生自乙烯基芳族单体的侧链的卤代丁基橡胶是可通过本发明的技术制备的热塑性弹性体。 这种热塑性弹性体通常具有氯丁基橡胶骨架和由聚苯乙烯组成的侧链。 本发明更具体地公开了一种将锂封端的乙烯基芳族聚合物接枝到卤代丁基橡胶上的方法,其包括:(1)用二烯单体封端锂封端的乙烯基芳族聚合物以制备锂封端的二烯封端的乙烯基芳族聚合物,和 2)使锂封端的二烯封端的乙烯基芳族聚合物与卤代丁基橡胶反应,以制备接枝有乙烯基芳族侧链的卤代丁基橡胶。

    High modulus rubber composition
    7.
    发明授权
    High modulus rubber composition 失效
    高模量橡胶组合物

    公开(公告)号:US4992513A

    公开(公告)日:1991-02-12

    申请号:US242099

    申请日:1988-09-09

    CPC分类号: C08G81/028

    摘要: It is desirable to increase the modulus of rubbers utilized in a wide variety of applications. This invention discloses a technique for modifying rubbers to improve their modulus without sacrificing other properties. The subject invention more specifically relates to a process for preparing a rubber composition having a high modulus which comprises reacting at least one epoxidized rubber with from about 2 phr to about 55 phr of at least one nylon at a temperature which is within the range of about 140.degree. C. to about 300.degree. C.

    Aqueous gels
    8.
    发明授权
    Aqueous gels 失效
    水性凝胶

    公开(公告)号:US4148746A

    公开(公告)日:1979-04-10

    申请号:US836863

    申请日:1977-09-26

    摘要: There is disclosed an aqueous medium comprising water to which has been added a water thickening amount of a water thickening polymer which is prepared by polymerizing at least one alkyl acrylate monomer and at least one carboxylic polymerizable monomer selected from the group consisting of acrylic acid and methacrylic acid which are present from 20 to 95 parts by weight per hundred parts of total monomer being polymerized and utilizing, as an ionic emulsifier, an emulsifier selected from the group consisting of disodium or diammonium nonylphenoxy polyethoxy sulfosuccinate having the general formula:CH.sub.3 (CH.sub.2).sub.8 C.sub.6 H.sub.4 O(CH.sub.2 CH.sub.2 O).sub.8-16 COCH.sub.2 CH(COOM)SO.sub.3 Qwherein Q is sodium or ammonium and a sodium or ammonium lauryl polyethoxysulfate having the general formula:CH.sub.2 (CH.sub.2).sub.11 O(CH.sub.2 CH.sub.2 O).sub.8-16 SO.sub.3 Qwherein Q is sodium or ammonium, said polymer in latex form being neutralized to a pH ranging between a pH of 5.5 to 11.5. Such polymers may also be gelled with water soluble polyvalent compounds such as sodium dichromate and water soluble reducing agents such as sodium hydrosulfite. The aqueous gels are employed in enhanced oil recovery.

    摘要翻译: 公开了包含水的水性介质,其中加入了水增稠量的水增稠聚合物,其通过聚合至少一种丙烯酸烷基酯单体和至少一种选自丙烯酸和甲基丙烯酸酯的羧基可聚合单体制备 酸,其以每100份总共单体为20至95重量份聚合并且作为离子乳化剂使用选自具有以下通式的二钠或壬基苯氧基聚乙氧基磺基琥珀酸二铵的乳化剂: