Vinyl chloride polymerization in reactor coated with build-up
suppressant product
    1.
    发明授权
    Vinyl chloride polymerization in reactor coated with build-up suppressant product 失效
    反应器中的氯乙烯聚合反应器涂有积聚抑制剂产物

    公开(公告)号:US4431783A

    公开(公告)日:1984-02-14

    申请号:US315265

    申请日:1981-10-26

    CPC分类号: C08F2/004

    摘要: Polymerization of vinyl chloride in aqueous suspension using a polymerization reactor having adherently deposited on internal surfaces thereof a build-up suppressant coating comprising a product of build-up suppressant activity formable by (and preferably formed by) the condensation of an effective 1-naphthol (preferably 1-naphthol itself) and formaldehyde. The condensation is preferably effected in a base-catalyzed reaction; it may also (less preferably) be effected in an acid-catalyzed reaction. The coating product itself and a process for its production are also claimed.

    摘要翻译: 使用在其内表面附着沉积的聚合反应器聚合氯乙烯在聚合反应器中的增殖抑制剂涂层,其包含由有效1-萘酚(优选由 优选1-萘酚本身)和甲醛。 缩合优选在碱催化反应中进行; 也可以(更不优选)在酸催化的反应中进行。 涂料产品本身及其生产方法也被要求保护。

    Aromatic polyethersulphones having --OCH.sub.2 COR end groups
    2.
    发明授权
    Aromatic polyethersulphones having --OCH.sub.2 COR end groups 失效
    具有-OCH 2 COR端基的芳族聚醚砜

    公开(公告)号:US4296217A

    公开(公告)日:1981-10-20

    申请号:US14249

    申请日:1979-02-22

    申请人: John Stuart-Webb

    发明人: John Stuart-Webb

    摘要: Aromatic polyethersulphones that are particularly useful as adhesives and coatings having end groups of formula --OCH.sub.2 COR, where R is alkyl or alkoxy. Preferred examples are --OCH.sub.2 COCH.sub.3 and --OCH.sub.2 COOC.sub.2 H.sub.5. Such polymers may be made by heating polyethersulphones made from halophenates or bisphenate/dihalide mixtures, in the presence of a reagent of formula XCH.sub.2 COR (X is halogen, preferably chlorine), such as chloroacetone or ethyl chloroacetate, for a short period of time. Such polymers of molecular weight (RV

    摘要翻译: 作为具有式-OCH 2 COR的端基的粘合剂和涂层特别有用的芳族聚醚砜,其中R是烷基或烷氧基。 优选的实例是-OCH 2 COCH 3和-OCH 2 COOC 2 H 5。 这样的聚合物可以通过在式XCH2COR(X是卤素,优选氯)的试剂,例如氯丙酮或氯乙酸乙酯的存在下,将由卤代苯甲酸酯或双酚/二卤化物混合物制成的聚醚砜加热制备,短时间内。 这种分子量(RV <0.25)的聚合物在包含分散在聚醚砜的溶液或分散体中的氟碳聚合物的分散体的涂料组合物中特别有用。