Asahi Denka Kogyo K.k.

Adeka Corporation

Nec Corporation

Nippon Hoso' Kyokai

Asahi Denka Koygo Kabushiki Kaisha

Yukio Tatsumi

Noriyoshi Tanaka

Aritoshi Fukushima

Tamiji Kamakura

Kazuhisa Morita

Yoko Saito

Kimiyoshi Namiwa

Masato Namiki

Kenji Yamamoto

Kazuhiro Umehara

Yukiya Moriizumi

Shinji Iino

Haruo Takeda

Atsuo Miyashita

Hideo Yokobori

Naomi Koishikawa

Takuya Shioda

Tomohiko Sugimoto

Ikuji Fujitani

Kazuhisa Haeiwa

Yuji Baba

Tomofumi Yoshimi

Noriyoshi Asahi Denka Kogyo KK Tanaka

The purpose of the present invention is to provide a thiodicarboxylic acid ester which has high long-term storage stability without inhibiting antioxidant properties and wear-resistant properties of the thiodicarboxylic acid ester. In order to achieve the above-mentioned purpose, the present invention provides a lubricating oil additive composition which is characterized by containing a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2) and by having an acid value of 0.01-0.4 mgKOH/g.  

Lubricating oil additive composition and method for improving storage stability of lubricating oil additive composition

Provided is a lubricating oil composition for an internal combustion engine, including as essential components the following component (A), component (B), and component (C), in which a phosphorus content of the composition is 50 ppm by mass to 1,000 ppm by mass: Component (A): a base oil; Component (B): a compound represented by the following general formula (1); and Component (C): a metal-containing antioxidant: where Rto Reach independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, Z represents a hydrocarbon group having 2 to 20 carbon atoms, and n represents a number of 1 to 10.

Lubricating oil composition for internal combustion engine

Provided is a phosphorus molybdenum amine compound, represented by the following general formula (I). where Rto Reach independently represent a hydrogen atom or a hydrocarbon group and p represents a number ofto, provided that all of Rto Rare can not all be hydrogen atoms at the same time and the phosphorus molybdenum compound is obtained by reducing a hexavalent molybdenum compound with a reducing agent, and then reacting the resulting with an acidic phosphate after neutralization with a mineral acid.

Phosphorus molybdenum compound and method for producing same

A lubricating oil additive capable of providing an antioxidant which enables a lubricating oil composition to have long drain intervals, while reducing specific components such as metals and phosphorus atoms, and a lubricating oil composition containing the lubricating oil additive are provided. A phosphorus molybdenum compound represented by the following general formula (1) where R, R, and Reach independently represent a hydrocarbon group having 1 to 20 carbon atoms is also provided.

Phosphorus-molybdenum compound, method for producing same and lubricant additive and lubricant composition containing the compound

Lubricant composition

Lubricated refrigerant composition containing fluorocarbon-type refrigerant, synthetic oil and molybdenumoxysulfide derivatives

There is provided a lubricating composition including a lubricating base containing an asymmetric sulfurized oxymolybdenum dithiocarbamate of the formula (1); a symmetric sulfurized oxymolybdenum dithiocarbamate of the formula (2); and a phenolic or aminic antioxidant.

Lubricating compositions

Refrigerant incorporating a polyoxyalkylene glycol monomethylether

Since output voltage e of coupler CU2 is displaced in phase by -135 degrees from input signals c and d (by -270 degrees from signals a and b), a carrier which makes signal f is phase shifted by -270 degrees by phase shifter .phi.1 so that signal f may have the same phase as signal e. Signal f and signal e are power composed by first 3 dB coupler M1, and are further phase shift controlled by variable phase shifters PH11 and PH12 so that they may have the same phase. Further, an output signal of variable phase shifter PH11 is phase shifted by -90 degrees by phase shifter SH1 so that it has a phase difference by 90 degrees from an output signal of variable phase shifter PH2, and the two signals controlled in this manner are inputted to 3 dB coupler M2. Consequently, two signals e and f inputted to the amplifier are all outputted as output voltage EOUT. According to the present invention of a television broadcasting machine, since a carrier is phase modulated and amplitude modulated with amplitude information and phase information obtained from an input video signal, a vestigial side band signal is outputted to form a television signal without using vestigial side band.

Digital amplitude modulation amplifier and television broadcasting

A lubricating composition of the present invention comprises a base oil for lubricating oil or base grease; at least one molybdenum compound as component (A) selected from the group consisting of a selected sulfurized oxymolybdenum dithiocarbamate, a selected sulfurized oxymolybdenum dithiophosphate and a selected molybdenum amine compound; and a (poly)glycerol ether and/or a (poly)oxyalkylene glycol monoalkyl ether as component (B).

Lubricating composition

Engine oil composition

A process for producing molybdenum oxysulfide dithiocarbamate (MoDTC) by reacting [A] an aqueous solution or suspension prepared by reacting (a) a compound having hexavalent molybdenum, with (b) an alkali hydrogensulfide or an alkali sulfide, [B] a carbon disulfide, [C] a secondary amine and [D] a mineral acid, wherein [E] a reducing agent is added and reacted at any stage, and a lubricating oil composition containing the compound obtained according to said process. MoDTC can be efficiently produced in high yields by using a hexavalent molybdenum compound as a starting material, and the produced MoDTC has low corrosive action, excellent wear characteristics and excellent lubricating properties.

Process for producing molybdenum oxysulfide dithiocarbamate

The present invention is directed to providing a lubricating oil composition which contains an alkyl group asymmetric type molydbdenum dithiocarbamate (MoDTC) as an essential component thereof and which exhibits far more excellent lubrication performance than a conventional lubricating oil composition containing an alkyl group symmetric type MoDTC conventional used in the field of lubricating oils. The lubricating oil composition according to the present invention comprises a base oil for a lubricating oil consisting of a mineral oil and/or a synthetic oil and having a viscosity index of at least 115 and a viscosity at 100.degree. C. falling within the range of 2 to 50 cSt, and a specific alkyl group asymmetric type MoDTC as an essential component.

Lubricating oil composition

The objective of the present invention resides in providing a lubricant for refrigerators that reacts rapidly with free acids and contains a stabilizer that has good compatibility with a chlorine-free Flon-thpe coolant such as Flon 134a and the like whose molecules do not contain chlorine. The lubricant for refrigerators employing a chlorine-free Flon-type coolant in accordance with the present invention 100 parts by weight of a synthetic oil and is compounded with 0.05 to 15 parts by weight of an alicyclic epoxy compound having one or more functional groups represented by the following formula: ##STR1## (wherein R.sub.1 and R.sub.2 independently represent a hydrogen or methyl group, and may be the same or different).

Lubricated refrigerant composition containing alicyclic epoxy compounds

A grease composition comprising 0.1 to 10 parts by weight of a powdered molybdenum oxysulfide dithiocarbamate composition which comprises a compound represented by the following formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independent hydrocarbyl groups and may be the same or different groups, and the total number of carbon atoms contained in R.sup.1 to R.sup.4 is 4 to 36; and wherein X is sulfur or oxygen and the composition of the total of all Xs is given as S.sub.m and O.sub.n in which m and n satisfy the ranges of 1.7.ltoreq.m.ltoreq.3.5 and 0.5.ltoreq.n.ltoreq.2.3, respectively, in which the constituent particles have diameters of not larger than 50 .mu.m, based on 100 parts by weight of a base grease.

Growing community of inventors

Tokyo, Japan

Yukio Tatsumi