摘要:
A problem with refrigeration systems using ammonia as the refrigerant and hydrocarbon lubricants is that the seals/gaskets of the systems have a tendency to harden and shrink. This can cause leakage of the refrigerant and eventually require disassembly of the equipment and replacement of the seals. The addition of a small amount polyether having an aromatic fragment of 6-18 carbon atoms or an aliphatic fragment of 10-22 carbon atoms can soften the seals and partially re-swell the seals solving the leakage problem and avoiding expensive maintenance costs. Alternatively a polyether of 1,2-butylene oxide which is more oil soluble than most other polyethers with a smaller Z group e.g. derived from alkanols of 1 to 9 carbon would be effective at reducing hardening and shrinkage.
摘要:
A lubricating oil composition for hybrid vehicles includes a major amount of an oil of lubricating viscosity; an ethoxylated alcohol demulsifier of the following formula R1-(O-R2)n-OH. R1 is a branched or linear hydrocarbon group having from 6 to 20 carbon atoms. R2 is a saturated hydrocarbon group having from 2 to 4 carbon atoms and n is an integer from 1 to 10.
摘要:
A capped oil soluble polyalkylene glycol has the following structure: R 1 O-(AO) n -R 2 where: R 1 is a linear or branched alkyl or aryl with one to 18 carbon atoms; AO refers to residuals of monomers selected from 1,2-butylene oxide and 1,2-propylene oxide selected so that at least 50 weight-percent of the (AO) n component is 1,2-butylene oxide residuals; n is selected to provide a kinematic viscosity at 100 degrees Celsius of less than 5 centiStokes for the non-capped polyalkylene glycol; and R 2 is a linear or branched alkyl or aryl having from 1-8 carbon atoms and wherein the capped oil soluble polyalkylene glycol is characterized by having a kinematic viscosity of less than 4.5 centiStokes at 100 degrees Celsius and a viscosity index of greater than 150.
摘要:
Металлоплакирующая многофункциональная композиция для моторных, трансмиссионных и индустриальных масел, содержащая металлоплакирующую маслорастворимую присадку, производное сукцинимида, ароматический амин, эпоксидную смолу и антипенную добавку с заявленным соотношением компонентов. Композиция обладает антифрикционными, противозадирными, антиокислительными и моющие-диспергирующими свойствами и может быть использована в маслах для двигателей внутреннего сгорания грузовых и легковых автомобилей, локомотивов, речного и морского флота, а также в трансмиссионных и индустриальных маслах.
摘要:
The present invention is related to refrigerant and lubricant compositions containing performance-enhancing additives. The performance enhancing additives are found to improve the energy efficiency and capacity of vapor compression refrigeration and air conditioning systems, which utilize hydrofluorocarbon refrigerants (e.g. HFC-134a) and oxygenated refrigeration lubricants (e.g. POEs, PAGs and PVEs).
摘要:
A blend (320) for lubricating a surface includes a lubricant (322) and a polyepoxide co(ter)polymer additive (216) mixed with the lubricant (322). The polyepoxide co(ter)polymer additive (216) includes a first block having monomer M1 and a second block having monomer M2. The first monomer M1 includes hexene oxide, HO, or octene oxide, OO, and the second monomer M2 includes propylene oxide, PO.
摘要:
L'invention concerne l'utilisation d'une composition lubrifiante comprenant au moins une huile de base et au moins un polyalkylène glycol (PAG) obtenu par polymérisation ou copolymérisation d'oxydes d'alkylène comprenant de 3 à 8 atomes de carbone, dont au moins un oxyde de butylène pour prévenir ou diminuer le préallumage dans un moteur, de préférence dans un moteur de véhicule.