Elasthane fibers stabilized against environmental influences
    31.
    发明授权
    Elasthane fibers stabilized against environmental influences 失效
    弹性纤维可以抵御环境影响

    公开(公告)号:US4877825A

    公开(公告)日:1989-10-31

    申请号:US323042

    申请日:1989-03-10

    CPC分类号: D01F6/70 C08K5/3477 C08K5/527

    摘要: The invention relates to elasthane fibers which are protected against harmful environmental influences, particularly sunlight and combustion gases, by a synergistic stabilizer combination of(a) highly alkylated, phenolic antioxidants corresponding to the following formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 are C.sub.1 -C.sub.3 alkyl radicals, in addition to which R.sup.3 may be C.sub.4 -C.sub.6 alkyl radicalsand(b) oligomeric, (cyclo)aliphatic phosphorous acid esters (oligomeric phosphites) obtained by reaction of pentaerythritol, perhydrobisphenol A and, optionally, a mono- alcohol with monomeric trialkyl or triaryl phosphites.

    摘要翻译: 本发明涉及通过以下协同稳定剂组合(a)高度烷基化的酚类抗氧化剂,其对应于下列式(Ⅰ),其中R 1,R 2和R 3是保护免受有害环境影响的特别是阳光和燃烧气体的弹性纤维 除了R 3可以是C 4 -C 6烷基以外,还有(b)通过季戊四醇,全氢双酚A和任选的单 - (C 1 -C 6)烷基反应获得的低聚,(环)脂族亚磷酸酯 - 醇与单体三烷基或三芳基亚磷酸酯。

    Production of copolymers of acrylonitrile and vinyl chloride
    36.
    发明授权
    Production of copolymers of acrylonitrile and vinyl chloride 失效
    生产丙烯腈和氯乙烯的共聚物

    公开(公告)号:US4334046A

    公开(公告)日:1982-06-08

    申请号:US95724

    申请日:1979-11-19

    CPC分类号: C08F214/06 C08F220/44

    摘要: The invention relates to a process for the production of a chemically uniform acrylonitrile vinyl chloride copolymer in an aqueous emulsion in the presence of a redox catalyst and with a fluctuating concentration of at least one iron salt in the reaction medium wherein the polymerization reaction is carried out at a pH value of from 2 to 6 in the presence of a mixture of an iron salt and a complex former, the complex former having certain apparent stability constants of the iron-II-complex and of the iron-III-complex.

    摘要翻译: 本发明涉及一种在氧化还原催化剂存在下在水性乳液中制备化学均匀的丙烯腈氯乙烯共聚物的方法,并且在反应介质中具有波动浓度的至少一种铁盐,其中进行聚合反应 在铁盐和络合物的混合物存在下,在2-6的pH值下,络合物具有铁-II-络合物和铁-III-络合物的一定表观稳定常数。

    Process for the production of bead polymers
    37.
    发明授权
    Process for the production of bead polymers 失效
    生产珠粒聚合物的方法

    公开(公告)号:US4223114A

    公开(公告)日:1980-09-16

    申请号:US899979

    申请日:1978-04-25

    摘要: A two-phase bead polymer having an average bead diameter of from 10.mu. to 150.mu. comprising(A) 88% to 99.5% by weight of a polymer of polymerized units of at least one methacrylic acid ester containing from 1 to 10 carbon atoms in the aliphatic, saturated alcohol component; and(B) 0.5% to 12% by weight of a polyurethane which has been obtained from (1) at least one dihydroxy compound, (2) a diisocyanate from the group comprising (a) aliphatic diisocyanates having a branched carbon skeleton of 7 to 26 carbon atoms, (b) cycloaliphatic diisocyanates and (c) aliphatic or cycloaliphatic diisocyanates modified by radical graft copolymerization with vinyl monomers, (3) an aliphatic or cycloaliphatic diamine and (4) a monofunctional chain terminator.

    摘要翻译: 具有10μm至150μm的平均珠粒直径的两相珠粒聚合物包含(A)88重量%至99.5重量%的至少一种含有1-10个碳原子的甲基丙烯酸酯的聚合单元的聚合物 脂肪族饱和醇组分; 和(B)0.5重量%至12重量%的由(1)至少一种二羟基化合物获得的聚氨酯,(2)二异氰酸酯,其包含(a)具有支链碳骨架的脂族二异氰酸酯为7〜 26个碳原子,(b)脂环族二异氰酸酯和(c)通过与乙烯基单体的自由基接枝共聚改性的脂族或脂环族二异氰酸酯,(3)脂族或脂环族二胺和(4)单官能链终止剂。

    Process for the preparation of carbonic acid esters of polyester-polyols
    38.
    发明授权
    Process for the preparation of carbonic acid esters of polyester-polyols 失效
    聚酯多元醇碳酸酯的制备方法

    公开(公告)号:US4191705A

    公开(公告)日:1980-03-04

    申请号:US845174

    申请日:1977-10-25

    CPC分类号: C08G63/64 C08G63/916

    摘要: The present invention relates to a process for the preparation of carbonic acid esters of polyester-polyols by transesterifying the polyols with carbonic acid aryl esters at elevated temperatures under vacuum in the presence of a catalyst. The reaction conditions are controlled to avoid the formation of by-products and the chain extension of the polyester-polyols. The present invention is also concerned with the polyester carbonic acid esters so formed, their use in producing polycarbonate block copolymers and the copolymers so produced. The copolymers may be produced by transesterifying the polyester carbonic acid esters with bisphenols and subjecting the bis-hydroxyaryl carbonates so formed to normal polycarbonate synthesis such as interfacial or melt polycondensation.

    摘要翻译: 本发明涉及一种通过在催化剂存在下在真空下在升高的温度下将多元醇与碳酸芳酯酯交换而制备聚酯多元醇的碳酸酯的方法。 控制反应条件以避免副产物的形成和聚酯多元醇的链延长。 本发明还涉及如此形成的聚酯碳酸酯,它们在生产聚碳酸酯嵌段共聚物中的用途以及如此制备的共聚物。 共聚物可以通过将聚酯碳酸酯与双酚酯交换并使如此形成的双羟基芳基碳酸酯进行正常的聚碳酸酯合成如界面或熔融缩聚来制备。