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    Syntactic foam compositions useful for manufacturing floating articles
    4.
    发明授权
    Syntactic foam compositions useful for manufacturing floating articles 失效
    用于制造浮动制品的合成泡沫组合物

    公开(公告)号：US4255524A

    公开(公告)日：1981-03-10

    申请号：US85366

    申请日：1979-10-16

    申请人： Francois Dawans ,  Daniel Binet

    发明人： Francois Dawans ,  Daniel Binet

    IPC分类号： C08F279/00 ,  C08J9/32 ,  C08L47/00

    CPC分类号： C08J9/32 ,  C08J2309/00

    摘要： Syntactic foam compositions are manufactured by heat-curing, in the presence of a free radical generator, a mixture comprising a resin and hollow spheres; the resin consists of(a) 10 to 100% of polybutadiene with 20-95% 1,2 units, 5-60% thereof being in a carbocyclic cyclized form, its number average molecular weight being at most 100,000;(b) 0 to 90% of polybutadiene with 40-98% 1, 2 units and 2-60% 1, 4 units, its number average molecular weight being at most 100,000; and(c) 0 to 90% of a polymerizable liquid vinyl monomer.

    摘要翻译： 合成泡沫组合物通过在自由基发生剂存在下，包含树脂和中空球体的混合物进行热固化来制备; 该树脂由（a）10-100％的聚丁二烯和20-95％的1,2-单元组成，其中5-60％是碳环环化的，其数均分子量至多为100,000; （b）0至90％的聚丁二烯，其中40-98％的1,2单元和2-60％的1,4单元，其数均分子量至多为100,000; 和（c）0〜90％的可聚合液体乙烯基单体。

    Method for recovery of alkali metal or alkaline-earth metal terephthalate and of alkylene glycol from polyethylene terephthalates
    8.
    发明授权
    Method for recovery of alkali metal or alkaline-earth metal terephthalate and of alkylene glycol from polyethylene terephthalates 失效
    从聚对苯二甲酸乙二醇酯中回收碱金属或碱土金属对苯二甲酸盐和亚烷基二醇的方法

    公开(公告)号：US5545746A

    公开(公告)日：1996-08-13

    申请号：US367859

    申请日：1995-01-03

    申请人： Jacques Benzaria ,  Francois Dawans ,  Bruno Durif-Varambon ,  Jean-Bernard Gaillard

    发明人： Jacques Benzaria ,  Francois Dawans ,  Bruno Durif-Varambon ,  Jean-Bernard Gaillard

    IPC分类号： C07C29/09 ,  C07C51/09 ,  C07C51/41 ,  C07C67/48

    CPC分类号： C07C51/09 ,  C07C29/095 ,  C07C51/41

    摘要： An improved method for recovery of alkali metal or alkaline-earth metal terephthalate and of alkylene glycol, from polyalkylene terephthalate, in particular from polyethylene terephthalate (P.E.T.), alkylene glycol, in particular ethylene glycol produced in the form of vapor during the saponification reaction, initiated by the action of intensive kneading of polyalkylene terephthalate and the alkaline reagent at a temperature of 100.degree. to 200.degree. C. The alkylene glycol is recovered in gaseous form by entrainment by an inert gas or by extraction under low pressure. The alkaline terephthalate or alkaline-earth terephthalate is obtained in solid or powder form; it can easily be stored, transported and redissolved, in order to be purified and possibly transformed into terephthalic acid or ester.

    摘要翻译： 聚对苯二甲酸亚烷基酯，特别是聚对苯二甲酸乙二醇酯（PET），亚烷基二醇，尤其是在皂化反应过程中以蒸汽形式生产的乙二醇，回收碱金属或碱土金属对苯二甲酸酯和亚烷基二醇的改进方法， 由聚对苯二甲酸亚烷基酯和碱性试剂在100至200℃的温度下强烈捏合的作用引发。亚烷基二醇通过惰性气体的夹带或低压萃取而以气态回收。 碱性对苯二甲酸酯或碱土类对苯二甲酸酯以固体或粉末形式获得; 它可以容易地储存，运输和重新溶解，以便被纯化并可能转化成对苯二甲酸或酯。