摘要:
The specification discloses forming ceramic films, and especially high temperature superconductor films, by dissolving ceramic precursor metal iodides in organic solvents, applying them to a substrate, evaporating the solvent and pyrolyzing and annealing the resulting ceramic precursor metal iodide films.
摘要:
A hydrosilylation reaction curable composition including a silsesquioxane polymer, a cross-linking compound, a hydrosilylation reaction catalyst and colloidal silica having a surface coating formed thereon. The curable composition is cured to form a cured resin having high fracture toughness and strength without the loss of elastic modulus and glass transition temperature.
摘要:
A method for preparing in situ reinforced silicone elastomers and the compositions prepared by the method. The method comprises forming a mixture comprising an end-functional diorganopolysiloxane; a stoichiometric excess of a hydrolyzable siloxane having hydrolyzable functionality described by formula--R.sup.2 SiQ.sub.3-b R.sub.b, were each R is independently selected from a group consisting of alkyls comprising one to six carbon atoms, alkenyls comprising two to six carbon atoms, and aryls, R.sup.2 is a divalent hydrocarbon radical comprising one to 12 carbon atoms, each Q is independently selected from a group consisting of hydroxy, acyloxys comprising one to six carbon atoms, alkoxys comprising one to six carbon atoms, and substituted alkoxys comprising one to six carbon atoms, and b=0 to 2; and a tin salt catalyst and contacting the mixture with water to effect curing. The resulting silicone elastomers are in situ reinforced to provide high strength.
摘要翻译:一种制备原位增强的有机硅弹性体的方法和通过该方法制备的组合物。 该方法包括形成包含端官能二有机聚硅氧烷的混合物; 化学计量过量的具有式-R2SiQ3-bRb所示的可水解官能度的可水解硅氧烷各自独立地选自包含1至6个碳原子的烷基,包含2至6个碳原子的烯基和芳基,R2是 包含1至12个碳原子的二价烃基,每个Q独立地选自羟基,包含1至6个碳原子的酰氧基,包含1至6个碳原子的烷氧基和含有1至6个碳原子的取代的烷氧基,以及 b = 0〜2; 和锡盐催化剂,并将该混合物与水接触以进行固化。 所得到的有机硅弹性体原位加强以提供高强度。
摘要:
The present invention relates to a novel method of preparing siloxane bonds. The method comprises reacting less than or equal to 1 equivalent of a carboxylic acid with 2 equivalents of alkoxy groups on an alkoxysilane in the presence of a strong acid.
摘要:
A method for preparing in situ reinforced silicone elastomers and the compositions prepared by the method. The method comprises forming a mixture comprising a diorganosiloxane polymer having reactive end-terminal functionality, a stoichiometric excess of a reactive siloxane selected from a group consisting of triorganosilyl endblocked reactive siloxanes and reactive cyclosiloxanes, and a tin salt catalyst and contacting the mixture with water to effect curing. The resulting silicone elastomers are in situ reinforced to provide high strength.