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273 条记录 (耗时 0.012 秒)

    High molecular weight poly(vinyl acetate) and poly(vinyl alcohol) and processes for their production
    61.
    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

    申请人： Tse C. Wu ,  James C. West

    发明人： Tse C. Wu ,  James C. West

    IPC分类号： C08F8/00 ,  C08F8/12 ,  C08F18/08 ,  C08F18/04

    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。

    Allyl carbonate and substituted allyl carbonate esters of 1,4-dialkylol cyclohexane, and polymers thereof
    63.
    发明授权
    Allyl carbonate and substituted allyl carbonate esters of 1,4-dialkylol cyclohexane, and polymers thereof 失效
    全氟代碳酸酯和取代的1,4-二烷基环己烷的全部碳酸酯及其聚合物

    公开(公告)号：US3679727A

    公开(公告)日：1972-07-25

    申请号：US3679727D

    申请日：1969-07-22

    申请人： DART IND INC

    发明人： BERRY DAVID A ,  GYNN GILBERT M

    IPC分类号： C08F18/08 ,  C07C69/00 ,  C08F3/52 ,  C08F37/16

    CPC分类号： C08F18/08

    摘要： Disubstituted cyclohexane compositions designated as either bis(2-alkylallylcarbonyldioxy) 1,4-dialkylene cyclohexane or bis(2-arylallylcarbonyldioxy) 1,4-dialkylene cyclohexane represented by the formula:

    WHEREIN R1 is a lower alkyl and R2 is hydrogen or an alkyl, aryl, aralkyl or alkaryl hydrocarbon radical, are useful in the production of polymers and copolymers. Compositions containing these polymers and copolymers when combined with the proper filler have outstanding stain resistance as well as excellent impact resistance and other strength properties when compared with prior art compositions recognized as outstanding for use in dinnerware.

    摘要翻译： 二取代的环己烷组合物，称为双（2-烷基烯丙基羰基二氧基）1,4-二亚烷基环己烷或由下式表示的双（2-芳基烯丙基羰基二氧基）1,4-二亚烷基环己烷：WHEREIN R1是低级烷基，R2是氢或烷基， 芳基，芳烷基或烷芳基烃基可用于生产聚合物和共聚物。 当与适当的填料组合时，含有这些聚合物和共聚物的组合物与现有技术中被认为优于用于餐具的组合物相比，具有优异的抗污性以及优异的抗冲击性和其它强度性能。