Abstract:
This invention relates to a process of preparing a high dropping point grease comprising a combination of a selected lithium soap of hydroxy fatty acid and a lithium salt of boric acid wherein said lithium salt of boric acid is formed in situ in the presence of an additive amount of selected water soluble polyhydroxy compound.
Abstract:
Asbestiform crystalline calcium M phosphate, where M is sodium or lithium, having a length to average diameter ratio of at least 5:1, can be prepared by forming a melt of a source of oxygen, calcium, phosphorus and M having a mole ratio of about 15 percent to about 30 percent M.sub.2 O, about 48 percent to about 60 percent P.sub.2 O.sub.5 and about 20 percent to about 37 percent CaO, cooling the melt within the range of about 500.degree. C. to about 750.degree. C. for a sufficient time to permit blocks of calcium M phosphate to form, and fiberizing the blocks into the asbestiform crystals. Such asbestiform crystalline calcium M phosphates are useful to prepare composites of organic polymeric materials.
Abstract:
본 발명은 (A) 하기 화학식 1로 표시되는 25 ℃의 동점도가 50 내지 500,000 ㎟/s인 오르가노폴리실록산: 0 내지 30 질량%,
R 1 a SiO (4-a)/2 (R 1 은 1가 탄화수소기, 1.8≤a≤2.2) (B) 하기 화학식 2로 표시되는 오르가노폴리실록산: 0 내지 30 질량%,
(R 2 는 1가 탄화수소기, R 3 은 알킬기, 알콕시알킬기, 알케닐기 또는 아실기, n은 5 내지 100, b는 1 내지 3임) ((A), (B)의 합계는 3 내지 30 질량%) (C) 10 W/m℃ 이상의 열전도율을 갖는 열전도성 충전재: 60 내지 96.9 질량%, (D) (A), (B)를 분산 또는 용해할 수 있는 비점 260 내지 360 ℃의 미휘발성 이소파라핀 화합물: 0.1 내지 10 질량% ((A) 내지 (D)의 합계는 100 질량%) 를 필수로 하는 방열용 실리콘 그리스 조성물을 제공한다. 본 발명의 조성물은 용이하게 또한 균일하고 얇게 도포할 수 있고, 실온 중에서의 보존 안정성이 대폭 향상되고, 취급이 매우 용이하며, 방열 특성도 발휘할 수 있다. 방열용 실리콘 그리스 조성물, 오르가노폴리실록산, 열전도성 충전재, 미휘발성 이소파라핀 화합물, 보존 안정성, 방열 특성
Abstract:
A heat dissipating silicone grease composition is provided to easily and uniformly coat, to improve a preserving stability at a room temperature, to facilitate the handling and to realize charateristics of heating and disssipation. A heat dissipating silicone grease composition comprises (A) an organopolysiloxane 0 - 30 mass % in which the dynamic viscosity indicated as below chemical formula 1 of 25 deg.C is 50 - 500,000 mm^2 / s; (B) an organopolysiloxane 0 -30 mass % indicated as the following chemical formula 2, wherein the sum of (A) and (B) is 3 -30 mass %; (C) a thermally conductive filler 60 - 96.9 mass % having a thermal conductivity more than 10 W / m deg.C; and (D) a non-volatile isoparaffin compound 0.1 - 10 mass % which can disperse and dissolve the (A) and (B) and has a boiling point 260 - 360 deg.C, wherein the sum of (A) and (D) is 100 mass %.
Abstract:
(A) 식: R 2 SiO 2/2 로 나타내어지는 실록산 단위 80~96.5몰%, 식: RSiO 3/2 로 나타내어지는 실록산 단위 1.0~10.0몰%, 및 식: R 3 SiO 1/2 로 나타내어지는 실록산 단위 0.25~10.0몰%로 이루어진 액상 오르가노폴리실록산(식중, R은 같거나 또는 다른 1가 탄화 수소기이다.), 및 (B) 증조제로 적어도 이루어진 그리스상 실리콘 조성물을 개시한다. 증조제를 다량으로 함유시킬 수 있고, 또한 우수한 내열성을 갖는 그리스상 실리콘 조성물을 제공할 수 있다.
Abstract:
The invention relates to thermally conductive greases that may contain carrier oil(s), dispersant(s), and thermally conductive particles, wherein the thermally conductive particles are a mixture of at least three distributions of thermally conductive particles, each of the at least three distributions of thermally conductive particles having an average (D50) particle size which differs from the other average particle sizes by at least a factor of five. The thermally conductive greases of the invention exhibit desirable rheological behavior during installation/ application and during use of devices involving these materials.
Abstract:
A silicone grease composition comprising 3-30 wt% of an organopolysiloxane and 60-96.9 wt% of a heat conductive filler is diluted with a least volatile isoparaffin having a boiling point of 260-360°C. Despite a heavy loading of heat conductive filler, the grease composition is easily applicable to heat sinks as a thin uniform coating. The composition is drastically increased in shelf stability at room temperature, easy to handle, and provides for good heat dissipation.
Abstract:
Disclosed are high performance grease compositions containing methylfluoroalkylsiloxanes and solid thickeners containing fluorinated polymers.
Abstract:
Adducts of clay, especially of the smectite variety, most especially bentonite, are prepared with an effective amount of at least one activated mixed metal oxide or oxy-hydroxide (AHMMO) formed by dehydrating hydrotalcite or a mixture comprising magnesium oxide and aluminum oxide, or a crystalline mixed metal hydroxide conforming substantially to the formula LimDdT(OH)¿(m+2d+3+n.a)(A?n)a.xH2O where m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n, where n is 1 or more, (m+2d+3+n.a) is equal to or greater than 3, (m+d) is greater than zero, and xH2O represents excess waters of hydration. These adducts are useful, e.g., in drilling muds and in viscosity modification of a wide variety of fluids.
Abstract:
A lubricating grease having a high dropping point, good stability against oxidation and long life contains a thickener comprising essentially the three components: lithium soap of C12-24 hydroxy fatty acid; lithium phosphate salt produced from phosphoric or phosphorous acid ester and dilithium borate. The amounts of hydroxy fatty acid and phosphoric or phosphorous acid ester are 3-100 parts by weight and 0.05-15 parts by weight per part by weight of boric acid respectively.