摘要:
An alkenyl-functional silylated polymethylsilsesquioxane that contains no more than 0.12 residual silanol per Si atom and is obtained by silylating the silanol in starting polymethylsilsesquioxane. The starting polymethylsilsesquioxane has a predetermined number average molecular weight, Mn, from 380 to 2,000 and is represented by the general formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.mwherein m and n are positive numbers that provide the predetermined Mn, with the proviso that the value of m/(m+n) is less than or equal to 0.152/(Mn.times.10.sup.-3)+0.10 and greater than or equal to 0.034/(Mn.times.10.sup.-3). The alkenyl-functional silylated polymethylsilsesquioxane has the formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.m-k (CH.sub.3 Si(OSiR.sup.1 R.sup.2 R.sup.3)O.sub.2/2).sub.kwherein k is a positive number smaller than A, (m-k/(m+n) is less than or equal to 0.12, and R.sup.1, R.sup.2 and R.sup.3 are each selected from substituted and unsubstituted monovalent hydrocarbon groups with the proviso that at least 1 of said R.sup.1, R.sup.2, and R.sup.3 is a group that contains a crosslinkable carbon--carbon double bond.
摘要:
A silylated polymethylsilsesquioxane, that contains no more than 0.12 residual silanol per Si atom and has a predetermined number average molecular weight from 380 to 2,000 is obtained by silylating the silanol in a starting polymethylsilsesquioxane with the formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.mwherein m and n are positive numbers that provide the specified molecular weight and 0.034/(M.times.10.sup.-3).ltoreq.m/(m+n).ltoreq.0.152/(M.times.10.sup.-3)+0.10. The silylated polymethylsilsequioxanes of the present invention exhibit compatibility with silicone polymers, e.g., polydimethylsiloxanes. As a consequence, the silylated polymethylsilsesquioxanes of the invention can be used in a wide range of applications as, for example, a reinforcing filler for rubbers.
摘要:
This invention relates to a silicone release coating comprising (A) an organopolysiloxane having at least two crosslinkable carbon-carbon double bonds in each molecule, (B) an organopolysiloxane having at least two Si-bonded hydrogen atoms in each molecule, (C) a silylated polymethylsilsesquioxane and (D) platinum catalyst. The silicone release coating compositions of this invention can further comprise an inhibitor. The silicone release coating compositions of this invention do not decline in release resistance due to release paper aging or release liner aging.
摘要:
A hydrogen-functional silylated polymethylsilsesquioxane that contains no more than 0.12 residual silanol per Si atom and is obtained by silylating the silanol in starting polymethylsilsesquioxane. The starting polymethylsilsesquioxane has a predetermined number average molecular weight, Mn, from 380 to 2,000 and is represented by the general formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.mwherein m and n are positive numbers that provide the predetermined Mn, with the proviso that the value of m/(m+n) is less than or equal to 0.152/(Mn.times.10.sup.-3)+0.10 and greater than or equal to 0.034/(Mn.times.10.sup.-3). The hydrogen-functional silylated polymethylsilsesquioxane has the formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.m-k (CH.sub.3 Si(OSiR.sup.1 R.sup.2 R.sup.3)O.sub.2/2).sub.kwherein k is a positive number smaller than m, (m-k/(m+n) is less than or equal to 0.12, and R.sup.1, R.sup.2, and R.sup.3 are each selected from substituted and unsubstituted monovalent hydrocarbon groups with the proviso that at least 1 of said R.sup.1, R.sup.2, and R.sup.3 is hydrogen.
摘要翻译:每个Si原子含有不超过0.12个残余硅烷醇的氢官能的甲硅烷基化的聚甲基倍半硅氧烷,并通过在起始的聚甲基倍半硅氧烷中硅烷化得到。 起始聚甲基倍半硅氧烷具有预定的数均分子量Mn,为380-2,000,并由通式(CH 3 SiO 3/2)n(CH 3 Si(OH)O 2/2)m表示,其中+ E,uns m + EE和+ E,uns n + EE是提供预定Mn的正数,条件是+ E,uns m + EE /(+ E,uns m + EE ++ E,uns n + EE)的值小于 或等于0.152 /(Mn×10-3)+0.10且大于或等于0.034 /(Mn×10-3)。 氢官能的甲硅烷基化聚甲基倍半硅氧烷具有式(CH 3 SiO 3/2)n(CH 3 Si(OH)O 2/2)mk(CH 3 Si(OSiR 1 R 2)3 O 2)2其中+ E, E,uns m + EE,(+ E,uns m + EE - + E,uns k + EE /(+ E,uns m + EE ++ E,uns n + EE)小于或等于0.12, R 1,R 2和R 3各自选自取代和未取代的单价烃基,条件是所述R 1,R 2和R 3中的至少1个为氢。
摘要:
In an embodiment, one reinforced substrate for use in a photovoltaic device includes a polymer base material and a reinforcing structure bonded with the base material. The reinforced substrate presents a surface in a condition that is made-ready for deposition of thin film layers of the photovoltaic device. A thin film photovoltaic device includes the reinforced substrate, a back contact layer formed on the surface of the reinforced substrate, and a solar absorber layer formed on the back contact layer. A plurality of thin film photovoltaic devices may be formed on a common reinforced substrate. A process of producing a reinforced substrate includes combining a fluid base material and a fiber reinforcing structure to form an impregnated fiber reinforcement. The impregnated fiber reinforcement is cured to form the reinforced substrate, and the reinforced substrate is annealed.
摘要:
Methods employing acidic and basic catalysts are disclosed, and generally entail hydrolysis and condensation reactions of silicon based components. The methods are useful for forming siloxane-modified metal-oxide nanoparticles, such as modified ZrO2 nanoparticles. The siloxane-modified metal-oxide nanoparticles, and products including the siloxane-modified metal-oxide nanoparticles, can be used to form various products, such as lenses or encapsulants for making various devices, such as, but not limited to, light emitting diodes (LEDs).
摘要:
A composition includes an organopolysiloxane component (A) having at least one aryl group and having an average of at least two alkenyl groups per molecule. The composition further includes an organohydrogensiloxane component (B) having at least one of an alkyl group and an aryl group and an average of at least two silicon-bonded hydrogen atoms per molecule. Components (A) and (B) each independently have a number average molecular weight less than or equal to 1500 (g/mole). The composition yet further includes a catalytic amount of a hydrosilylation catalyst component (C), and metal-oxide nanoparticles (D) other than titanium dioxide (TiO2) nanoparticles. The composition has a molar ratio of alkyl groups to aryl groups ranging from 1:0.25 to 1:3.0. A product of the present invention is the reaction product of the composition, which may be used to make a light emitting diode.
摘要:
A cured organopolysiloxane resin film having gas barrier properties in which a layer of cured organopolysiloxane that contains an organic functional group, an organic group produced by the polymerization of polymerizable organic functional groups, or the hydrosilyl group or silanol group, is formed on a visible region-transparent film comprising cured organopolysiloxane resin yielded by hydrosilylation reaction-mediated crosslinking, and in which a silicon oxynitride layer, silicon nitride layer, or silicon oxide layer is formed on the aforementioned layer of cured organopolysiloxane. Also, a method of producing this cured organopolysiloxane resin film having gas barrier properties.
摘要:
A free-standing film comprising a cured organopolysiloxane resin obtained by conducting a cross-linking reaction between (A) an organopolysiloxane resin represented by the following average siloxane unit formula: [R1aR23-aSiO1/2]v[R3SiO3/2]w (1) or [R1aR23-aSiO1/2]x[R3SiO3/2]y[SiO4/2]z (2) (where R1 designates univalent hydrocarbon groups of one or more than one type selected from alkyl groups having 1 to 4 carbon atoms and univalent aromatic hydrocarbon groups having 6 to 8 carbon atoms; R2 designate alkenyl groups having 2 to 6 carbon atoms; R3 designates alkyl groups with 1 to 4 carbon atoms or univalent aromatic hydrocarbon groups having 6 to 8 carbon atoms; at least 50 mole % of R3 groups being phenyl groups; “a” is 0, 1, or 2; 0.8≦w
摘要翻译:通过在(A)由以下平均硅氧烷单元式:[R a R 23-a SiO 1/2/2] v [R 3 SiO 3/2] w(1)表示的有机聚硅氧烷树脂之间进行交联反应获得的固化的有机聚硅氧烷树脂, )或[R1aR23-aSiO1 / 2] x [R3SiO3 / 2] y [SiO4 / 2] z(2)(其中R1表示一个或多于一种选自具有1至4个碳原子的烷基的一价烃基, 具有6至8个碳原子的单价芳族烃基; R 2表示具有2至6个碳原子的烯基; R 3表示具有1至4个碳原子的烷基或具有6至8个碳原子的单价芳族烃基;至少50摩尔% R3为苯基;“a”为0,1或2;0.8≤n1E; w <1.0且v + w = 1; 0
摘要:
A copper indium diselenide (CIS)-based photovoltaic device includes a CIS-based solar absorber layer including copper, indium, and selenium. The CIS-based photovoltaic device further includes a substrate including a silicone layer formed from a silicone composition and a metal foil layer. The substrate, due to the presence of the silicone layer and the metal foil layer, is both flexible and sufficiently able to withstand annealing temperatures in excess of 500° C. to obtain maximum efficiency of the device.