High molecular weight poly(vinyl acetate) and poly(vinyl alcohol) and
processes for their production
    1.
    发明授权
    High molecular weight poly(vinyl acetate) and poly(vinyl alcohol) and processes for their production 失效
    高分子量聚(乙酸乙烯酯)和聚(乙烯醇)及其生产方法

    公开(公告)号:US4463138A

    公开(公告)日:1984-07-31

    申请号:US429941

    申请日:1982-09-30

    CPC分类号: C08F18/08 C08F8/10 C08F8/12

    摘要: An improved poly(vinyl acetate) which on hydrolysis and reacetylation has an intrinsic viscosity of at least about 5 dL/g and an improved poly(vinyl alcohol) which on acetylation yields poly(vinyl acetate) having an intrinsic viscosity of at least about 5 dL/g. Such poly(vinyl acetate) can be prepared by photo-initiated free radical bulk polymerization of vinyl acetate with controlled low initiator concentration, polymerization temperature and reaction time. Such poly(vinyl alcohol) can be prepared by conventional alcoholysis of the poly(vinyl acetate).

    摘要翻译: 改进的聚(乙酸乙烯酯),其在水解和再乙酰化时具有至少约5dL / g的特性粘度和改进的聚(乙烯醇),其在乙酰化时产生具有至少约5的特性粘度的聚(乙酸乙烯酯) dL / g。 这种聚(乙酸乙烯酯)可以通过光引发的乙酸乙烯酯的自由基本体聚合制备,具有受控的低引发剂浓度,聚合温度和反应时间。 这种聚(乙烯醇)可以通过聚乙酸乙烯酯的常规醇解来制备。

    Interfacial process for producing poly(ester-carbonate) containing
phenolphthalein
    2.
    发明授权
    Interfacial process for producing poly(ester-carbonate) containing phenolphthalein 失效
    用于生产含有酚酞的聚(碳酸酯)的界面方法

    公开(公告)号:US4386196A

    公开(公告)日:1983-05-31

    申请号:US364589

    申请日:1982-04-02

    申请人: Tse C. Wu Leon Segal

    发明人: Tse C. Wu Leon Segal

    IPC分类号: C08G63/00 C08G63/64 C08G63/78

    CPC分类号: C08G63/64

    摘要: An interfacial process for producing a poly(ester-carbonate) containing aromatic dihydroxy moieties derived from phenolphthalein. In the process, phenolphthalein polyester oligomers are formed first, and then the oligomers are reacted with phosgene and with additional aromatic or cycloaliphatic diacyl halide and with an aqueous solution of bisphenol-derived salt to form the poly(ester-carbonate).

    摘要翻译: 一种用于生产含有由酚酞衍生的芳族二羟基部分的聚(酯 - 碳酸酯)的界面方法。 在此过程中,首先形成酚酞聚酯低聚物,然后使低聚物与光气和另外的芳族或脂环族二酰基卤化物和双酚衍生的盐的水溶液反应形成聚(碳酸酯 - 碳酸酯)。

    Low color compositions comprising a cross-linked polycyanurate polymer
and a thermoplastic polymer
    3.
    发明授权
    Low color compositions comprising a cross-linked polycyanurate polymer and a thermoplastic polymer 失效
    包含交联聚氰化脲聚合物和热塑性聚合物的低色组合物

    公开(公告)号:US4334045A

    公开(公告)日:1982-06-08

    申请号:US213530

    申请日:1980-12-05

    CPC分类号: C08L79/04 C08G73/0661

    摘要: A monomeric aromatic dicyanate is purified to remove color forming impurities, combined with a zinc salt catalyst and cured first below 200.degree. C. and then for a limited time at or above 200.degree. C., either alone or in admixture with or on a thermoplastic polymer. For example, purified 2,2-bis(4-cyanatophenyl)propane is purified, combined with a poly(ester carbonate) and zinc chloride, and then cured at increasing temperatures from 150.degree. C. to 250.degree. C.

    摘要翻译: 纯化单体芳族二氰酸酯以除去形成成色杂质,并与锌盐催化剂组合,然后首先在200℃以下固化,然后在200℃或200℃以上的限定时间,单独或与热塑性塑料混合或混合 聚合物。 例如,将纯化的2,2-双(4-氰基苯基)丙烷纯化,与聚(碳酸酯)和氯化锌组合,然后在150℃至250℃的升温下固化。

    Process for the production of poly(vinyl acetate) and poly(vinyl alcohol)
    4.
    发明授权
    Process for the production of poly(vinyl acetate) and poly(vinyl alcohol) 失效
    制备聚(乙酸乙烯酯)和聚(乙烯醇)的方法

    公开(公告)号:US4820767A

    公开(公告)日:1989-04-11

    申请号:US674400

    申请日:1984-11-23

    申请人: Tse C. Wu

    发明人: Tse C. Wu

    IPC分类号: C08F8/12 C08F8/00

    CPC分类号: C08F8/12

    摘要: This invention relates to a process for the production of poly(vinyl alcohol) having a weight average molecular weight of at least about 0.4.times.10.sup.6 by polymerizing vinyl acetate at a temperature of from about 0.degree. C. to about 40.degree. C. in the presence of an azo free radical polymerization initiator essentially in the absence of ultraviolet radiation to form an essentially linear poly(vinyl acetate) having a weight average molecular weight of at least about 1.0.times.10.sup.6 and thereafter hydrolyzing the poly(vinyl acetate) to form the desired poly(vinyl alcohol).

    摘要翻译: 本发明涉及通过在约0℃至约40℃的温度下聚合乙酸乙烯酯,在存在的情况下生产重均分子量至少约为0.4×10 6的聚(乙烯醇)的方法 的基本上不存在紫外线辐射的偶氮自由基聚合引发剂,以形成重均分子量为至少约1.0×10 6的基本上线性的聚(乙酸乙烯酯),然后水解聚乙酸乙烯酯以形成所需的聚 (乙烯醇)。

    Low color compositions comprising a cross-linked polycyanurate polymer
and a thermoplastic polymer
    5.
    发明授权
    Low color compositions comprising a cross-linked polycyanurate polymer and a thermoplastic polymer 失效
    包含交联聚氰化脲聚合物和热塑性聚合物的低色组合物

    公开(公告)号:US4414366A

    公开(公告)日:1983-11-08

    申请号:US384857

    申请日:1982-06-04

    CPC分类号: C08G73/0661 C08L79/04

    摘要: Purified aromatic dicyanates are cured with a catalyst which is an Mn(II), Ag(II), Fe(III), Bi(III), In(III) or Hf(IV) salt at 150.degree.-200.degree. C. and then at 200.degree.-300.degree. C. for a time sufficient to cure the dicyanate without causing color formations to the extent of a Yellowness Index over 30. In some forms the dicyanate is combined with the catalyst and a thermoplastic.

    摘要翻译: 纯化的芳族二氰酸酯在150℃-200℃下用Mn(II),Ag(II),Fe(III),Bi(III),In(III)或Hf(IV)盐催化剂固化, 然后在200°-300℃下搅拌足以固化二氰酸酯的时间,而不会使黄色指数超过30的颜色形成。在某些形式中,二氰酸酯与催化剂和热塑性塑料组合。