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    • 5. 发明授权
    • Room temperature curable polyether composition
    • 室温固化聚醚组合物
    • US5358996A
    • 1994-10-25
    • US101709
    • 1993-08-04
    • Toshio TakagoKouichi YamaguchiShinichi SatoTakashi Matsuda
    • Toshio TakagoKouichi YamaguchiShinichi SatoTakashi Matsuda
    • C08G65/32C08G65/22C08G65/336C08J3/24C08L71/02C08L83/00C08G77/06C09K3/00
    • C08G65/336C08G65/226
    • A room temperature curable polyether composition, comprising a polyether compound of which at least one terminal has a group, represented by the general formula (1): ##STR1## wherein R.sup.1 is an alkyl group or an aryl group, R.sup.2 is a hydrogen atom or a monovalent organic group, R.sup.3 is a divalent organic group, X is a hydrogen atom, a halogen atom, a hydroxyl group, an alkoxyl group, an alkenyloxy group, an acyloxy group, a ketoximate group, an amido group, an aminoxy group or a mercapto group and a is an integer of 0 to 2, and of which main chain comprises a fluorine-containing polyether chain, represented by the general formula (2): ##STR2## wherein R.sub.f is a perfluoro group, R.sup.4 is a divalent organic group, m is an integer of 4 or more and n is an integer of 0 or more. The cured product thereof is excellent in rubber properties and is useful as one-part or two-part type elastic sealant. Furthermore it provides an elastic sealant excellent in solvent-resistance, chemical resistance, water repellency, oil repellency, etc.
    • 一种室温可固化聚醚组合物,其包含由通式(1)表示的至少一个具有基团的末端的聚醚化合物:其中R 1为烷基或芳基,R 2为 氢原子或一价有机基团,R 3为二价有机基团,X为氢原子,卤素原子,羟基,烷氧基,烯氧基,酰氧基,酮肟基,酰胺基, 氨基或巯基,a为0〜2的整数,其主链包括由通式(2)表示的含氟聚醚链:其中Rf为全氟基团 R4为二价有机基团,m为4以上的整数,n为0以上的整数。 其固化物的橡胶性能优异,可用作一部分或两部分型弹性密封剂。 此外,它提供了耐溶剂性,耐化学性,防水性,拒油性等优异的弹性密封剂。
    • 7. 发明授权
    • Preparation of high molecular weight organopolysiloxane
    • 高分子量有机聚硅氧烷的制备
    • US5227447A
    • 1993-07-13
    • US925194
    • 1992-08-06
    • Shinichi SatoTakashi MatsudaToshio Takago
    • Shinichi SatoTakashi MatsudaToshio Takago
    • C08G77/08
    • C08G77/08
    • The process for preparing a high molecular weight organopolysiloxane comprises subjecting a hydroxyl-containing organosiloxane, as a starting material, to a dehydration condensation reaction in the presence of an acidic compound selected from the acidic compounds represented by the following general formulas (1) and (2): ##STR1## wherein in the formulas n is an integer of from 1 to 10, k is an integer of from 0 to 8, and 1 and m are each an integer of 0 or above, with 1+m being in the range from 1 to 10. The process is advantageous over the conventional methods in that compounds having toxicity or the like are neither used nor by-produced. The process also has the merit of easy control of the molecular weight of the intended organopolysiloxane.
    • 制备高分子量有机聚硅氧烷的方法包括在选自下列通式(1)和(I)表示的酸性化合物的酸性化合物存在下,使含羟基的有机硅氧烷作为起始原料进行脱水缩合反应, 2):(1)(2)其中,在式中,n是1至10的整数,k是0至8的整数,并且1和m各自为整数0或 其中1 + m在1至10的范围内。该方法优于常规方法,因为具有毒性等的化合物既不使用也不再生产。 该方法还具有易于控制目标有机聚硅氧烷的分子量的优点。