Process for shortstopping emulsion polymerizations which does not
generate nitrosamines
    1.
    发明授权
    Process for shortstopping emulsion polymerizations which does not generate nitrosamines 失效
    不产生亚硝胺的快速乳化聚合方法

    公开(公告)号:US5504168A

    公开(公告)日:1996-04-02

    申请号:US339228

    申请日:1994-11-10

    CPC分类号: C08F10/00 C08F36/04

    摘要: Method for the shortstopping of polymerizations of conjugated dienes possibly mixed with vinyl-substituted aromatic products in a radicalic emulsion polymerization process using a redox initiator, in particular radicalic emulsion polymerizations of butadiene possibly mixed with styrene or acrylonitrile, a method which enables the production of polymers without nitrosamines (NA) and/or their precursors.

    摘要翻译: 在使用氧化还原引发剂的自由基乳液聚合方法中,特别是可能与苯乙烯或丙烯腈混合的丁二烯的自由基乳液聚合中,可能与乙烯基取代的芳族化合物混合的共轭二烯的聚合速度的方法,能够生产聚合物的方法 没有亚硝胺(NA)和/或其前体。

    Adhesive latex based on carboxyl-functionalized polychloroprene with low water retention
    2.
    发明授权
    Adhesive latex based on carboxyl-functionalized polychloroprene with low water retention 有权
    基于具有低保水性的羧基官能化聚氯丁二烯的胶乳

    公开(公告)号:US06756456B2

    公开(公告)日:2004-06-29

    申请号:US10143981

    申请日:2002-05-14

    IPC分类号: C08F216

    CPC分类号: C08F36/18 C08F2/26

    摘要: A process for the polymerization of chloroprene or of a mixture of chloroprene and of up to 20% by weight of a copolymerizable monomer, in aqueous emulsion in the presence of radical initiators, at a temperature of between 5° C. and 70° C., characterized in that the polymerization is carried out in the presence of one or more copolymerizable surfactants in agreement with the formula described below (I) R3—Z—CO—C(R1)═C(R2)—COOM  (I) where: R3 is a saturated or unsaturated, linear or branched and aliphatic or aromatic Cn hydrocarbonaceous chain with n from 10 to 20; R1 and R2, which are identical or different, are chosen from H or a C1-C3 alkyl radical; Z is chosen from —O— and —NH—; M is chosen from alkali metals or NH4.

    摘要翻译: 在5℃至70℃的温度下,在自由基引发剂的存在下,在水乳液中聚合氯丁二烯或氯丁二烯混合物和至多20重量%可共聚单体的方法。 其特征在于聚合在一种或多种可共聚表面活性剂的存在下进行,与下述式(I)一致:其中:R 3是饱和或不饱和的直链或支链和脂族或芳族C n烃链 n为10至20; R 1和R 2相同或不同,选自H或C 1 -C 3烷基; Z选自-O-和-NH-; M选自 来自碱金属或NH4。