摘要:
The invention provides a lubricating composition containing (a) 0.001 wt % to 15 wt % of a polymer with radial or star architecture; (b) an overbased detergent; (c) a dispersant; and (d) an oil of lubricating viscosity. The invention further provides a method for lubricating a mechanical device with the lubricating composition.
摘要:
A lubricant composition is disclosed that comprises lubricating oil and a mixture of at least two antioxidants, the first antioxidant being a substituted diphenylamine and/or a heterocyclic amine and the second antioxidant being a substituted phenol. Also disclosed is a method of increasing the oxidation stability of a lubricating oil comprising adding thereto at least two antioxidants, the first antioxidant being a substituted diphenylamine and/or a heterocyclic amine and the second antioxidant being a substituted phenol.
摘要:
The invention provides a lubricating composition containing (a) 0.001 wt % to 15 wt % of a polymer with radial or star architecture; (b) an overbased detergent; (c) a dispersant; and (d) an oil of lubricating viscosity. The invention further provides a method for lubricating a mechanical device with the lubricating composition.
摘要:
Fluorinated greases comprising: (A) from 1% to 50% by weight of a thickener; (B) from 99% to 50% by weight of a mixture of: (B1) from 0,1 to 100% by weight of a compound of structure:
X 1 -O (CF 2 O) n (CF 2 CF 2 O) m (CF 2 CF 2 CF 2 O) p (CF 2 CF 2 CF 2 CF 2 O) q -X 2 (I)
wherein: X 1 , X 2 have formula -(CF 2 ) z CF 3 wherein z is an integer between 0 and 3; n is an integer between 1 and 200; m is an integer between 0 and 200; p, q are integers between 0 and 10; with the proviso that: the (p+q)/(p+q+m+n) ≤0.05; m/n ≤0.7; the number average molecular weight of (I) is between 1,000 and 10,000; the kinematic viscosity at 40°C is lower than 20 cSt; and
(B2) from 99.9% to 0% by weight of a perfluoropolyether oil having a kinematic viscosity at 40°C higher than 15 cSt and comprising repeating units of the type (CFXO) wherein X is F or CF 3 ; -CF 2 CF 2 O-, -C 3 F 6 O, -CF(CF 3 )CF 2 O-, -CF 2 CF(CF 3 )O-, statistically distributed along the chain.
摘要:
Lubricating compositions containing a major amount of a base oil and an effective amount of an additive component having at least one compound of formula (I): where R is one of the following radicals, methyl, ethyl, n-propyl, I-propyl or a combination thereof, and n=0-8. In a preferred embodiment, R is a methyl radical and n=2-3. T he lubricating compositions provide improved lubricating performance, particularly by inhibiting oxidation and improving thermal stability.
摘要:
The present invention provides a rheology control agent of oil, which can impart a remarkably high elastic modulus with being sufficiently flowable as liquid by adding the same to the oil and it provides an oil composition having the greatly improved rheology characteristics. That is, the present invention provides a rheology control agent of oil, which is made from a polyether having monomeric units having the formula (I) and it provides an oil composition containing the rheology control agent and an oil: wherein R 1 represents a hydrogen atom, a hydrocarbon group having 1 to 42 carbon atoms or a group of -(AO) m -R 2 , R 2 being a hydrocarbon group having 1 to 28 carbon atoms, A being an alkylene group having 2 or 3 carbon atoms, m being a number of from 1 to 100.
摘要:
PCT No. PCT/US97/14028 Sec. 371 Date Mar. 23, 1998 Sec. 102(e) Date Mar. 23, 1998 PCT Filed Aug. 8, 1997 PCT Pub. No. WO98/05741 PCT Pub. Date Feb. 12, 1998A process for reacting certain carboxylic reactants with olefinic compounds then reacting the intermediate prepared thereby with ammonia, a hydrazine or an amine, and/or a reactive metal or reactive metal compound, products prepared thereby and, additive concentrates and lubricating oil and fuel compositions.