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    • 33. 发明授权
    • Room-temperature curable organopolysiloxane composition
    • 室温可固化的有机聚硅氧烷组合物
    • US06939925B2
    • 2005-09-06
    • US10682906
    • 2003-10-14
    • Takafumi SakamotoNorio KamedaTsuneo Kimura
    • Takafumi SakamotoNorio KamedaTsuneo Kimura
    • G02F1/1339C08G77/00C08G77/38C08K5/54C08K5/541C08L83/00C08L83/04C08L83/07C09D5/16C09D183/04C09D183/07C09D183/12C09J183/04
    • C08G77/44C08L83/10C09D5/1675
    • Provided is a room-temperature curable organopolysiloxane composition including (I) an organopolysiloxane, and (II) a silane compound containing silicon-bonded hydrolysable groups and/or a partial hydrolysis-condensation product thereof. The organopolysiloxane (I) is a condensation product of (A) an organosiloxane which includes R3SiO1/2 units wherein R represents an unsubstituted or substituted monovalent hydrocarbon group and SiO4/2 units, in which the molar ratio R3SiO1/2 to SiO4/2 is 0.6 to 1.2, and further includes less than 2.0% by weight of silicon-bonded hydroxyl groups, and (B) a diorganopolysiloxane with molecular chain terminals blocked with functional group-containing silyl groups. This composition generates a cured product or coating film with good transparency and good strength, which is useful as a coating material for electrical or electronic components or circuits, a sealant for liquid crystal display elements, and an antifouling paint for underwater structures.
    • 提供了包含(I)有机聚硅氧烷的室温可固化的有机聚硅氧烷组合物和(II)含有硅键合的可水解基团的硅烷化合物和/或其部分水解缩合产物。 有机聚硅氧烷(I)是(A)包含R 3 SiO 2 SiO 1/2单元的有机硅氧烷的缩合产物,其中R表示未取代或取代的一价烃基和SiO 其中R 3 SiO 2 SiO 1/2与SiO 4/2 2的摩尔比为4/2 / 2单位为 0.6至1.2,并且还包括小于2.0重量%的与硅键合的羟基,和(B)具有分子链末端被含官能团的甲硅烷基封端的二有机聚硅氧烷。 该组合物产生具有良好透明性和强度的固化产物或涂膜,其可用作电气或电子部件或电路用涂料,液晶显示元件用密封剂和水下结构用防污漆。
    • 36. 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.