Curable resin, process for making and electronic part protective coating
    71.
    发明授权
    Curable resin, process for making and electronic part protective coating 失效
    可固化树脂,制造工艺和电子部件保护涂层

    公开(公告)号:US5346979A

    公开(公告)日:1994-09-13

    申请号:US3398

    申请日:1993-01-12

    摘要: A novel curable polyimide resin of structural formula (1) or (2) is provided wherein R.sup.1 and R.sup.2 are independently substituted or unsubstituted monovalent C.sub.1-10 hydrocarbon groups, R.sup.3 is a divalent C.sub.1-10 organic group, X is a tetravalent organic group containing an aromatic or aliphatic ring, Y is a divalent organic group, Z is a divalent organic group containing an aromatic ring, W is a trivalent organic group containing an aromatic ring, m is an integer of 1 to 3, and n is an integer of at least 1. It can be prepared by reacting a polyimide with a silicon compound. The curable resin forms with a solvent a solution having a low viscosity and shelf stability and cures at relatively low temperatures below 300.degree. C. into coatings having heat resistance, mechanical strength, electrical properties, solvent resistance and substrate adherence. ##STR1##

    摘要翻译: 提供了结构式(1)或(2)的新型可固化聚酰亚胺树脂,其中R1和R2独立地是取代或未取代的一价C1-10烃基,R3是二价C1-10有机基团,X是含四价有机基团 芳香族或脂肪族环,Y为二价有机基团,Z为含有芳香环的二价有机基团,W为含有芳环的三价有机基团,m为1〜3的整数,n为 可以通过使聚酰亚胺与硅化合物反应来制备。 固化树脂与溶剂形成具有低粘度和储存稳定性的溶液,并且在低于300℃的相对低的温度下固化成具有耐热性,机械强度,电性能,耐溶剂性和基材粘附性的涂层。

    Silcone compositions comprising organic compounds having the
capabilities of coordination with metals
    75.
    发明授权
    Silcone compositions comprising organic compounds having the capabilities of coordination with metals 失效
    包含具有与金属配位能力的有机化合物的丝素组合物

    公开(公告)号:US5196477A

    公开(公告)日:1993-03-23

    申请号:US556496

    申请日:1990-07-24

    摘要: Silicone compositions comprising an organopolysiloxane composition and an organic compound capable of coordination with metals are described. Since the organic compound is preferentially adsorbed on a metal surface, the composition is particularly suitable for use in electric or electronic parts to prevent contact failure. A more specific embodiment comprises a diorganopolysiloxane of the average unit formula, R.sub.a SiO.sub.(4-a)/2, wherein each R independently represents an unsubstituted or substituted monovalent hydrocarbon group, and a is a value of from 1.90 to 2.05, a filler, an alkoxysilane or its hydrolyzate, a silylation catalyst made of an organic silicon compound having at least one specific type of group, an organic tin compound, another organosilicon compound capable of reaction with an alcohol in order to stabilize the composition, and an organic compound capable of coordination with metals.

    摘要翻译: 描述了包含有机聚硅氧烷组合物和能与金属配位的有机化合物的硅酮组合物。 由于有机化合物优先吸附在金属表面上,因此该组合物特别适用于电气或电子部件以防止接触不良。 更具体的实施方案包括平均单元式的二有机聚硅氧烷,RaSiO(4-a)/ 2,其中每个R独立地表示未取代或取代的一价烃基,a为1.90至2.05的值,填料, 烷氧基硅烷或其水解物,由具有至少一种特定类型基团的有机硅化合物制成的甲硅烷基化催化剂,有机锡化合物,能够与醇反应的另一种有机硅化合物以稳定组合物,以及能够 与金属配合。

    Method for the preparation of an integral rubber article having
electrically insulating and conductive parts
    79.
    发明授权
    Method for the preparation of an integral rubber article having electrically insulating and conductive parts 失效
    制备具有电绝缘和导电部件的整体橡胶制品的方法

    公开(公告)号:US5053167A

    公开(公告)日:1991-10-01

    申请号:US366422

    申请日:1989-06-15

    摘要: A method is disclosed for the preparation of an integral silicone rubber article having an electrically insulating part and an electrically conductive part, in which the adhesive bonding between the two parts is greatly enhanced and each part exhibits a remarkably small permanent compression set. The method comprises the steps of preparing a first cured silicone rubber body from a first silicone rubber composition and then curing a second silicone rubber body in contact with the first cured silicone rubber body under specified conditions while either one of the first and the second silicone rubber composition contains a substantial amount of a carbon black to give conductivity. Both of the two compositions comprises a non-acyl type organic peroxide, e.g., dicumyl peroxide, as a curing agent of the organopolysiloxane. Characteristically, either one or both of the two composition, of which the organopolysiloxane has at least two silicon-bonded vinyl groups in a molecule, comprise, in addition to the above mentioned organic peroxide, a combination of an organohydrogenpolysiloxane and a platinum catalyst so that the composition or compositions are curable in two ways of, one, the peroxide-induced crosslinking and, the other, the platinum-catalyzed addition reaction between the silicon-bonded vinyl groups and silicon-bonded hydrogen atoms.

    摘要翻译: 公开了一种用于制备具有电绝缘部分和导电部件的整体硅橡胶制品的方法,其中两部分之间的粘合剂粘合力大大增强,并且每个部件都显示出非常小的永久压缩永久变形。 该方法包括以下步骤:从第一硅橡胶组合物制备第一固化硅橡胶体,然后在规定条件下固化与第一固化硅橡胶体接触的第二硅橡胶体,同时第一和第二硅橡胶 组合物含有大量的炭黑以产生导电性。 两种组合物都包含作为有机聚硅氧烷的固化剂的非酰基型有机过氧化物,例如过氧化二异丙苯。 特征地,除了上述有机过氧化物之外,有机聚硅氧烷在分子中具有至少两个与硅键合的乙烯基的两种组合物中的一种或两种包含有机氢聚硅氧烷和铂催化剂的组合,使得 组合物或组合物可以以两种方式固化,一种是过氧化物诱导的交联,另一种是与硅键合的乙烯基和与硅键合的氢原子之间的铂催化的加成反应。