摘要:
A curable polyorganosiloxane composition comprising: (a) a polyorganosiloxane having two or more curable functional groups per molecule; (b) a crosslinking agent having per molecule two or more crosslinkable groups having reactivity with the curable functional group of the component (a); (c) a curing catalyst capable of catalyzing a crosslinking reaction of the component (a) and the component (b); (d) a pigment which itself does not emit a fluorescent light; and (e) a UV tracer. The composition can be used as an adhesive which is advantageous in that it is easy to confirm whether the adhesive has been uniformly applied to a substrate having a color similar to that of the composition.
摘要:
Provided is an addition reaction curing type polyorganosiloxane composition which has excellent adhesiveness to poly(phenylene sulfide) resins and decreases little in adhesiveness in long-term use in high-temperature environments. The polyorganosiloxane composition for bonding poly(phenylene sulfide) resins comprises (A) a polyorganosiloxane containing two or more alkenyl groups in the molecule, (B) a polyorganohydrogensiloxane having, in the molecule, three or more silicon-atom-bonded hydrogen atoms, (C) a platinum-based catalyst, (D) an oxide or carbonate of a metal selected from among the metals in Groups 2 and 12 of the periodic table, and (E) an adhesion promoter, the content of the ingredient (D) being 0.1-20 wt%/ with respect to the whole composition.
摘要:
The present invention provides a thermally conductive polysiloxane composition which has a high thermal conductivity, while having excellent work efficiency due to high ejection properties. A thermally conductive polysiloxane composition which contains (A) a thermally conductive filler and (B) one or more compounds selected from the group consisting of an alkoxysilyl group-containing compound and a dimethylpolysiloxane, wherein: component (A) comprises (A-1) round, indefinite-shaped or polyhedral aluminum nitride particles having an average particle diameter of from 50 µm to 150 µm and (A-2) round, indefinite-shaped or polyhedral aluminum nitride particles having an average particle diameter of 10 µm or more but less than 50 µm in an amount of from 20% by mass to 100% by mass relative to the total amount of component (A); and the content ratio of component (A-1) to component (A-2) is from 50:50 to 95:5 on a mass basis.
摘要:
There is provided an aqueous coating agent composition that does not contain an organotin compound and forms a coating film having good slipperiness and having excellent adhesiveness (adhesion) and abrasion resistance. The aqueous coating agent composition contains: (A) polydiorganosiloxane having both terminals blocked with hydroxyl groups, the polydiorganosiloxane having a viscosity of 50 to 100,000,000 mPa•s (at 25°C); (B) polyorganohydrogensiloxane having at least three hydrogen atoms in one molecule; (C) a zinc compound as a curing catalyst; (D) an organic compound and/or polyorganosiloxane having at least one of a primary amino group and a secondary amino group; (E) an adhesion improving component; and (F) spherical particles.
摘要:
To provide a polyorganosiloxane composition whose cured product has uniform good flame retardancy and good physical properties with less discoloring, for example, yellowing, and which has excellent temporal stability when stored. A flame-retardant polyorganosiloxane composition contains: (A) straight-chain polyalkylsiloxane having two or more alkenyl groups in one molecule and having a 10,000 to 1,000,000 mPa·s viscosity (25°C); (B) resinoid polyorganosiloxane containing a Q unit and having 1.5 or more alkenyl groups on average, mass% of the component (B) being 30 to 80 mass% of the total of the components (A), (B); (C) polyorganohydrogensiloxane having three or more Si-H, an amount of the component (C) being such that Si-H/(total of the alkenyl groups in the components (A), (B)) becomes 1.0 to 3.0 moles; and (D) a catalytic amount of a hydrosilylation reaction catalyst, wherein the total content of phosphorus and an alkali metal is 20 mass ppm or less.
摘要:
The present invention relates to a resin composition for electric/electronic components, comprising: (A) a polyorganosiloxane that contains a mercaptoalkyl group bonded to a silicon atom and has a viscosity at 23°C of 20 to 3,000 cP; (B) a polyorganosiloxane containing an aliphatic unsaturated group wherein the polyorganosiloxane (B) includes: (B1) a linear polyorganosiloxane represented by the formula (I) and optionally (B2) a branched polyorganosiloxane including a SiO 4/2 unit, an R' 3 SiO 1/2 unit and an R' 2 SiO 2/2 unit, and optionally further an R'SiO 3/2 unit wherein at least three R' groups per molecule of the branched polyorganosiloxane (B2) are aliphatic unsaturated groups; (C) a photoreaction initiator; (D) a chemically surface-treated silica having a BET specific surface area of 50 to 250 m 2 /g and a pH of 5.0 to 9.0; and (E) a polyoxyalkylene glycol in which an alkylene unit is a linear or branched alkylene group having 2 to 4 carbon atoms, and/or a derivative of the polyoxyalkylene glycol, wherein the ratio of the number of mercaptoalkyl groups in (A) to the total number of aliphatic unsaturated groups in (B) is 0.45 to 2.00, the content of (D) is 0.5 to 26 parts by mass relative to 100 parts by mass of (B), the proportion of the content of (E) is 0.001 to 1.0 mass% relative to the total mass of (A) to (E), and the viscosity at 23°C is 500 to 100,000 cP.
摘要:
A polyorganosiloxane composition for molding includes: (A) a straight-chain polyorganosiloxane having two or more alkenyl groups and having a viscosity (25°C) of 10,000 to 500,000 mPa·s; (B) 30 to 80 mass% of a resinoid polyorganosiloxane including M, D, and Q units, at a molar ratio of a:b:c, on average (0.3 ≤ a ≤ 0.6, 0 ≤ b ≤ 0.1, 0.4 ≤ c ≤ 0.7, and a + b + c = 1), and having two or more alkenyl groups; (C) an amount of a polyorganohydrogensiloxane having Si-bonded hydrogen atoms, an average degree of polymerization of 10 or more, a content of the Si-bonded hydrogen atoms of 5.0 mmol/g or more and 11.0 mmol/g or less, and a mass decrease rate up to 140°C by TGA of 2.0 mass% or less so that an amount of the (Si-bonded hydrogen atoms/alkenyl groups) is 1.0 to 3.0 mol; and (D) a hydrosilylation reaction catalyst. A cured product excellent in mold release property is obtained and contamination of a metal mold is prevented.
摘要翻译:用于模塑的聚有机硅氧烷组合物包括:(A)具有两个或更多个烯基并具有10,000至500,000mPa·s的粘度(25℃)的直链聚有机硅氧烷; (B)以摩尔比a:b:c计,包含M,D和Q单元的30〜80质量%的树脂状聚有机硅氧烷平均(0.3≤a≤0.6,0≤b≤0.1,0.4≤c ≤0.7,且a + b + c = 1),并且具有两个或更多个烯基; (C)具有Si键合的氢原子,平均聚合度为10以上,Si键合的氢原子的含量为5.0mmol / g以上且11.0mmol / g以下的聚有机氢硅氧烷的量,以及 (Si键合的氢原子/烯基)的量为1.0质量%以上且3.0mol以下的情况下,通过TGA达到140质量%的质量减少率为2.0质量%以下, 和(D)氢化硅烷化反应催化剂。 得到脱模性优异的固化物,防止金属模的污染。
摘要:
The invention provides dam compositions which can give cured products serving as dam materials exhibiting appropriate hardness and adhesion with respect to adherends and which are preferably such that the dam materials also have inconspicuous joints with fillers. The invention also provides image displays manufactured with the compositions. An image display sealant dam composition includes (A) a polyorganosiloxane having a mercaptoalkyl group bonded to a silicon atom, and having a viscosity at 23°C of 20 to 25000 cP; (B) an aliphatic unsaturated group-containing polyorganosiloxane including an aliphatic unsaturated group-containing linear polyorganosiloxane (B1) represented by Formula (I) and optionally further including a branched polyorganosiloxane (B2) having SiO 4/2 units, R' 3 SiO 1/2 units and R' 2 SiO 2/2 units, and optionally further having R'SiO 3/2 units, at least three R' groups per molecule of the branched polyorganosiloxane (B2) are aliphatic unsaturated groups; (C) a photoreaction initiator; (D) an aliphatic unsaturated group-containing silane compound; and (E) a fumed silica having a BET specific surface area of 180 to 500 m 2 /g. In the composition, the ratio of the number of the mercaptoalkyl groups present in (A) to the total number of the aliphatic unsaturated groups in (B) and (D) is 0.45 to 1.50; the amount of (E) is 0.5 to 24 parts by weight per 100 parts by weight of (B); and the composition has a viscosity at 23°C of 20,000 to 10,000,000 cP. An image display includes an image display component and a protective component sealed with the composition.
摘要:
A room temperature-curable polyorganosiloxane composition is a two component-type room temperature-curable polyorganosiloxane composition including (A) a base composition and (B) a cross-linking agent composition. The component (A) contains (a1) polyorganosiloxane having a hydroxyl group or an alkoxy group at a molecular end and (a2) an inorganic filler. The component (B) includes (b1) an organosilicon compound having three or more hydrolyzable groups in one molecule, (b2) polyorganosiloxane having an alkoxy group at a molecular end and represented by the following general formula and, and (b3) a curing catalyst. In the two component-type room temperature-curable polyorganosiloxane composition, it is possible to appropriately adjust a compounding ratio of the base component and the cross-linking component according to the use of an automatic mixer/discharger or the like without deteriorating properties such as deep-part curability, curing uniformity, and storage stability.