Abstract:
Provided is a heat conductive silicone grease composition, including: (A) 100 parts by volume of an organopolysiloxane with a specific structure and with a kinematic viscosity at 25°C of 10 to 10,000 mm 2 /s, (B) 0.1 to 50 parts by volume of an alkoxysilane with a specific structure, and (C) 100 to 2,500 parts by volume of a heat conductive filler. The composition exhibits high thermal conductivity, retains excellent fluidity meaning the composition exhibits favorable workability, and is capable of filling fine indentations, thereby reducing contact resistance and providing excellent heat radiation performance. Also, the durability, under conditions of high temperature and high humidity, of the composition is improved, thereby improving the reliability of the composition during actual use. Heat generated by a heat-generating body can be dissipated into a heat-radiating body by sandwiching the composition between the heat-generating body and the heat-radiating body.
Abstract:
Provided is a heat conductive silicone grease composition, including: (A) 100 parts by volume of an organopolysiloxane with a specific structure and with a kinematic viscosity at 25°C of 10 to 10,000 mm 2 /s, (B) 0.1 to 50 parts by volume of an alkoxysilane with a specific structure, and (C) 100 to 2,500 parts by volume of a heat conductive filler. The composition exhibits high thermal conductivity, retains excellent fluidity meaning the composition exhibits favorable workability, and is capable of filling fine indentations, thereby reducing contact resistance and providing excellent heat radiation performance. Also, the durability, under conditions of high temperature and high humidity, of the composition is improved, thereby improving the reliability of the composition during actual use. Heat generated by a heat-generating body can be dissipated into a heat-radiating body by sandwiching the composition between the heat-generating body and the heat-radiating body.
Abstract:
A grease-like silicone composition comprising at least (A) a liquid organopolysiloxane comprising 80 to 96.5 mol% of siloxane units represented by the formula R 2 SiO 2/2 , 1.0 to 10.0 mol% of siloxane units represented by the formula RSiO 3/2 , and 0.25 to 10.0 mol% of siloxane units represented by the formula R 3 SiO 1/2 (in the formulas, R stands for identical or different monovalent hydrocarbon groups) and (B) a thickening agent is disclosed. A grease-like silicone composition can be provided that is capable of containing a large amount of thickening agents and possesses superior heat resistance.
Abstract:
A lubricant having good extreme pressure properties and wear resistance contains not less thatn 0.1% by weight of at least one metallic phosphorus chalcogenide or an intercalation compound thereof.
Abstract:
High dropping-point lithium-complex grease composition having improved anti-noise properties, comprising a lubricating oil and the following components: (a) at least one lithium soap selected from the group consisting of the lithium salts of C10 to C34 fatty acids and C12 to C24 hydroxy fatty acids, (b) at least one lithium salt selected from the group consisting of the dilithium salts of C4 to C12 aliphatic dicarboxylic acids, the lithium salts of boric acids, and the lithium salts of aromatic hydroxy carboxylic acids, and (c) a high-molecular viscosity-index improver, and/or succinimide-type dispersant and/or metal salt detergent.
I. (LiA x ) y ·2Al(OH) 3 ·nH 2 O II. Li(R) v r 2Al(OH) 3 ·nH 2 O, or III. M m (R) v r (D) w z 2Al(OH) 3 ·nH 2 O
wherein A is one or more anions and/or negative-valence radicals or mixtures thereof; wherein, in formula I, x is a quantity of A ions or radicals sufficient to substantially satisfy the valence requirements of Li; wherein n is zero or the number of waters of hydration; wherein y is a numerical value at least sufficient to maintain the crystalline structure; wherein R is a monocarboxylic acid or dicarboxylic acid of C 6 -C 22 , including those which are OH - substituted; wherein r is greater than zero and represents the number of R ions in the molecule; wherein v is the valence of R, being monovalent or divalent; wherein M is divalent Zn or Ca cations; wherein D represents inorganic anions of valence 1-3, represented by w; wherein z is equal to or greater than zero and represents the number of D anions; wherein, in formula II, vr represents an amount of R anions to substantially satisfy the valence requirements of Li; wherein, in formula III, r>z and (vr + wz) represents an amount of combined anions, R and A, to substantially satisfy the valence requirements of M; with m representing the number of divalent M cations and having a numerical value in the range of 1 to 4. are found to improve the coefficient of friction and antiwear properties of lubrication fluids subjected to shearing, rubbing, or grinding forces at elevated pressure. Also, useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates of formula 1.
Abstract:
High dropping-point lithium-complex grease composition naving improved anti-noise properties, comprising a lubricating oil and the following components: (a) at least one lithium soap selected from the group consisting of the lithium salts of C 10 to C 34 fatty acids and C 12 to C 24 hydroxy fatty acids, (b) at least one lithium salt selected from the group consisting of the dilithium salts of C 4 to C 12 aliphatic dicarboxylic acids, the lithium salts of boric acids, and the lithium salts of aromatic hydroxy carboxylic acids, and (c) a high-molecular viscosity-index improver, and/or succinimide-type dispersant and/or metal salt detergent.
Abstract:
Asbestiform crystalline calcium M phosphate, where M is sodium or lithium, typically 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 M2O, about 48 percent to about 60 percent P2O5 and about 20 percent to about 37 percent CaO, cooling the melt within the range of about 500 DEG C. to about 750 DEG C. for a sufficient time to permit blocks of calcium M phosphate to form, and fiberizing the blocks into the asbestiform crystals. Such asbestiform crystaline calcium M phosphates are useful to prepare composites of organic polymeric materials.
Abstract:
High dropping-point lithium-complex grease composition having improved extreme pressure properties, comprising a lubricating oil and the following components:
(a) at least one lithium soap a C 12 to C 24 hydroxy fatty acid, (b) at least one lithium salt of a boric acid, and (c) at least one metal salt selected from the group consisting of
1) a potassium salt of a boric acid, 2) a sodium salt of a boric acid, 3) an alkaline earth metal salt of a boric acid, and 4) a zinc salt of a boric acid.