会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 71. 发明授权
    • Foaming organopolysiloxane composition and cured product thereof
    • 发泡有机聚硅氧烷组合物及其固化产物
    • US4972001A
    • 1990-11-20
    • US494021
    • 1990-03-15
    • Tsuneo KimuraYoshio Inoue
    • Tsuneo KimuraYoshio Inoue
    • C08J9/02C08K5/5415C08L83/04
    • C08J9/02C08K5/5415C08L83/04C08G77/045C08G77/12C08G77/16C08J2383/04Y10S521/913
    • A foaming polysiloxane composition providing excellent expansion ratio and expansion control comprising: (A) 100 parts by weight of an .alpha., .omega.-dihydroxyorganopolysiloxane, (B) 0.01-50 parts by weight of an organopolyhydroxypolysiloxane, (C) an organopolyhydrogensiloxane wherein 1 molecule contains at least 2 units represented by the general formula: ##EQU1## and in such quantity that SiH lies within the range of 0.5-30 mole per mole of total silanol groups in components A and B, (D) platinum or platinum compounds in a quantity of 0.1-200 ppm calculated as platinum metal per total weight of said components A, B and C, and (E) an organosilicon compound with acetylenic unsaturated groups in a quantity of 0.001-10 parts by weight per 100 parts by weight of components A,B,C and B; and a cured product thereof were disclosed.
    • 提供优异的膨胀率和膨胀控制的发泡聚硅氧烷组合物包括:(A)100重量份的α,ω-二羟基有机聚硅氧烷,(B)0.01-50重量份的有机聚羟基聚硅氧烷,(C)有机聚氢硅氧烷,其中1分子含有 由以下通式表示的至少2个单元:< IMAGE>并且其量使得SiH在组分A和B中每摩尔总硅烷醇基团为0.5-30摩尔的范围内,(D)一定量的铂或铂化合物 为0.1〜200ppm,按照所述组分A,B和C的总重量计为铂金属,和(E)每100重量份组分A为0.001-10重量份的炔属不饱和基团的有机硅化合物 ,B,C和B; 并公开了其固化物。
    • 75. 发明授权
    • Trimethylsilyl substituted phenols
    • 三甲基甲硅烷基取代的酚
    • US3137720A
    • 1964-06-16
    • US11116861
    • 1961-05-19
    • GEN ELECTRIC
    • COOPER GLENN D
    • C07F7/08C07F7/18C08G64/08C08K5/541C08K5/5415C08K5/5419
    • C07F7/1864C07F7/0818C07F7/1804C08G64/085C08K5/541C08K5/5415C08K5/5419
    • Silicon-containing general formula where m=1 or 2; n=1, 2 or 3; and m + n \sE4 are prepared by reacting where only one trimethyl siloxy group is o or p to any trimethyl silyl group with an alkali metal oxide and then excess water. Specified alkali metal alkoxides are of the formula XOR, where X is alkali metal and R is methyl, ethyl or propyl. Specified starting materials are 2,4-bis-(trimethyl silyl) trimethyl siloxy benzene; 2,6-bis - (trimethylsilyl), trimethylsiloxy benzene; 2,4,6 - tris - (trimethylsilyl) trimethylsiloxy benzene; 2,4 - bis - (triethylsilyl) trimethylsiloxy benzene; 2,5 - bis - (trimethylsiloxy) trimethylsilyl benzene; and 3,4 - bis - (trimethylsiloxy) trimethylsilyl benzene. The reaction is carried out by adding to the starting material a 1 : 5 molar solution of alkali metal alkoxide in a non-aqueous solvent, e.g. methanol ethanol, so that at least one mole of alkali metal oxide is provided per siloxy group. After stirring for up to several hours at about room temperature in an nitrogen atmosphere, the mixture is poured into a large excess of water. Neutralization of alkali by acid may be effected prior to isolation of the product by solvent extraction or by filtering. The examples describe the preparation of 2,4- and 2,6-bis-(trimethyl silyl) phenols; 2,4,6-tri-(trimethyl silyl) phenol; 4-trimethylsilyl catechol and trimethyl silyl hydroquinone which is converted by treatment with silver oxide to trimethyl silyl benzoquinone-1,4. Such products are claimed per se. The products may be used in quantities from 0.001 to 2% as stabilizers for polyethylene, polypropylene, polyvinyl chloride and polyvinylidene chloride and may be used as intermediates in polymer syntheses, e.g. the benzoquinone may undergo a Diels-Alder reaction.