摘要:
The present invention provides a novel lubricating composition comprising polybutylene glycol having a cap of a fluorinated alkyl group on at least one end thereof. The composition has a molecular weight between about 300 and about 4,000, and a viscosity of about 5 to about 150 centistokes at 37 DEG C. The composition is miscible in combination with refrigerant. As such, the present invention provides a composition for use in compression refrigeration and air-conditioning comprising: (a) a refrigerant selected from the group consisting of hydrofluorocarbon, hydrochlorofluorocarbon, fluorocarbon, and chlorofluorocarbon; and (b) a sufficient amount to provide lubrication of at least one polybutylene glycol having a cap of a fluorinated alkyl group on at least one end thereof.
摘要:
The invention provides azetropes or azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane and a fluorinated ketone, R f C(O)CF(CF 3 ) 2 , where R f is CF 3 CF 2 , CF 3 CF 2 CF 2 or (CF 3 ) 2 CF. Methods of using said azeotropes and azeotrope-like compositions to clean substrates, deposit coatings, transfer thermal energy, lubricate working operations, and aid in foam blowing are also disclosed.
摘要:
Use as additive to stabilize perfluoropolyether lubricant oils at high temperatures, preferably higher than 200°C, of a solid polymer at room temperature, having a softening or a melting point higher than 150°C, preferably higher than 200°C, and containing in the repeating unit at least one aromatic ring, preferably in the backbone, and lubricating compositions containing said additive.
摘要:
A highly fluorinated or perfluorinated liquid, and method of making the same, modified by the inclusion of at least one salt of fluorinated acid selected from the following groups of compounds: i) alkanes containing one or two carboxylic acid groups and comprising in the range of 6 to 22 carbon atoms in the main chain with fewer than 4 side chains none of which contain more than 2 carbon atoms and in which at least half the hydrogen atoms have been replaced by fluorine; ii) polyethers of the general formula: X-R1-(O-R2)n-(O-R3)m-R4Y where R1 is CZ2, C2Z4 or C3Z6 and Z is all hydrogen or all fluorine or a combination of the two R2 is CF3, C2F4 or C3F6, R3 is C2F4 or C3F6, R2 and R3 are randomly distributed along the chain. X is COOH or SO3H or a derivative thereof which is capable of hydrolysis to give the acid form is the same as X or is F, n + m
摘要翻译:高氟化或全氟化液体及其制备方法,通过包含至少一种选自以下化合物组的氟化酸盐进行改性:i)含有一个或两个羧酸基团并且包含在 在主链中具有少于4个侧链的6至22个碳原子,其中没有一个含有多于2个碳原子,并且其中至少一半的氢原子被氟取代; ii)通式为X-R1-(O-R2)n-(O-R3)m-R4Y的聚醚,其中R1为CZ2,C2Z4或C3Z6,Z为氢或全氟或两个R2 是CF 3,C 2 F 4或C 3 F 6,R 3是C 2 F 4或C 3 F 6,R 2和R 3沿链条随机分布。 X是COOH或SO 3 H或其能够水解得到酸形式的衍生物与X相同或为F,n + m <50; iii)具有不超过两个烷基侧链的环烷烃的羧酸或磺酸,每个烷基侧链含有不超过三个碳原子,并且所有氢原子的至少一半被氟取代; 或iv)含有1或2个六元环的芳族烃的羧酸或磺酸,具有不多于两个不多于两个碳原子的烷基侧链,其中至少一半的氢原子被氟代替。
摘要:
A surface treatment composition of fluorocarbon-oil-in-hydrocarbon-oil type with an excellent long-term stability, prepared by emulsifying a liquid fluorocarbon oil and a liquid hydrocarbon oil by using a polymeric surfactant having a fluorocarbon segment and a hydrocarbon segment in its molecule.
摘要:
The present invention provides a novel lubricating composition comprising a polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof. The composition has a molecular weight between 300 and 3,000, a viscosity of about 5 to about 150 centistokes at 37 DEG C., and a viscosity index of at least 20. The composition is miscible in combination with tetrafluoroethane in the range between -40 DEG C. and at least +20 DEG C. The novel lubricating composition is particularly useful with tetrafluoroethane in refrigeration and air-conditioning applications. As such, the present invention also provides a composition for use in refrigeration and air-conditioning comprising: (a) tetrafluoroethane; and (b) a sufficient amount to provide lubrication of at least one polyoxyalkylene glycol having a cap of fluorinated alkyl group on at least one end thereof. The lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37 DEG C., and a viscosity index of at least 20. The lubricant is miscible in combination with the tetrafluoroethane in the range between about -40 DEG C. and at least about +20 DEG C.