JP2010520319A5

JP2010520319A5 -

Info

Publication number: JP2010520319A5
Application number: JP2009551257A
Authority: JP
Filing date: 2008-02-21
Publication date: 2011-03-31

Description

好ましくは、前記の少なくとも１種のジエステルは下記の、
ａ）少なくとも１種のＣ_５〜Ｃ_１２、好ましくはＣ_６〜Ｃ_１０の脂肪族ジカルボン酸もしくはそれらの無水物と、少なくとも１種の第一級もしくは第二級、好ましくは第一級のＣ_７〜Ｃ_１２、好ましくはＣ_８〜Ｃ_１０の脂肪族一級アルコールとの反応生成物（前記の少なくとも１種の酸が分岐したものであれば、その場合は少なくとも１種の前記の少なくとも１種のアルコールは直鎖であり、もしも前記の少なくとも１種の酸が直鎖であれば、その場合は少なくとも１種の前記の少なくとも１種のアルコールは分岐したものである）、および
ｂ）少なくとも１種のＣ_５〜Ｃ_１２、好ましくはＣ_６〜Ｃ_１０の脂肪族モノカルボン酸と少なくとも１種のポリアルキレングリコール（そのアルキル基はＣ_２〜Ｃ_４アルキル基およびそれらの混合物から選ばれる）との反応生成物（前記の少なくとも１種のポリアルキレングリコールが分岐したメチル基である少なくとも１つの繰り返し単位を含んでいる場合には、少なくとも１種の前記の少なくとも１種の酸は直鎖であり、またもしも前記の少なくとも１種のポリアルキレングリコールが直鎖の繰り返し単位だけを含んでいる場合には、少なくとも１種の前記の少なくとも１種の酸は分岐している）、
からなる群から選ばれる。 Preferably, said at least one diester is:
a) at least one C ₅ -C ₁₂ , preferably C ₆ -C ₁₀ aliphatic dicarboxylic acid or anhydride thereof and at least one primary or secondary, preferably primary C Reaction product of _{7 to} C ₁₂ , preferably C _{8 to} C ₁₀ aliphatic primary alcohol (if the at least one acid is branched, in that case at least one of the at least one of the above The alcohol is linear, and if the at least one acid is linear, then at least one of the at least one alcohol is branched), and b) at least 1 _C 5 _{-C 12} species, preferably at least one polyalkylene glycol (the alkyl group with an aliphatic monocarboxylic acid _C 6 _{-C 10} is _C 2 -C ₄ alkyl group and A product of reaction with (chosen from these mixtures) (wherein said at least one polyalkylene glycol comprises at least one repeating unit which is a branched methyl group), One acid is linear, and if the at least one polyalkylene glycol contains only linear repeating units, at least one of the at least one acid is branched. ing),
Selected from the group consisting of

Claims

An engine lubricant comprising at least one diester of 15% by weight or more and an additive of 20% by weight or less, the at least one diester, or a mixture if more than one being present at 100 ° C. An engine lubricant having a kinematic viscosity of 3.3 cSt or less, a viscosity index of 130 or more, a pour point of −30 ° C. or less, and a Noack evaporation loss of 15% by mass or less.

SAE 0W engine lubricant comprising at least one diester of 15% by weight or more and an additive of 20% by weight or less, wherein the at least one diester, or a mixture thereof, if more than one is present An engine lubricant having a kinematic viscosity of 3.3 cSt or less at 100 ° C., a viscosity index of 130 or more, a pour point of −30 ° C. or less, and a Noack evaporation loss of 15% by mass or less.

Engine lubricant according to claim 1 or 2, consisting essentially of the at least one diester and the additive.

The engine lubricant according to claim 1 or 2, comprising at least 25 mass% and at most 40 mass% of the at least one diester.

5. An engine lubricant according to any one of claims 1, 2 and 4 comprising a lubricant component selected from API groups III, IV and V and mixtures thereof.

6. The engine lubricant of claim 5 consisting essentially of said at least one diester, said additive and at least one API Group V lubricant.

Said at least one diester has a kinematic viscosity of not more than 3.0 cSt and / or a viscosity index of not less than 140 and / or a pour point of not more than −35 ° C. and / or a Noack evaporation loss of not more than 14% by weight at 100 ° C. The engine lubricant according to any one of claims 1 to 6.

The at least one diester is
a) at least one C _５5 ~ C _１２12 Aliphatic dicarboxylic acids or their anhydrides and at least one primary or secondary C _７7 ~ C _１２12 A reaction product with an aliphatic primary alcohol (if the at least one acid is branched, at least one of the at least one alcohol is linear; If one acid is linear, then at least one said at least one alcohol is branched), and
b) at least one C _５5 ~ C _１２12 Of an aliphatic monocarboxylic acid and at least one polyalkylene glycol (the alkyl group of which is C _２2 ~ C _４4 A reaction product with an alkyl group and mixtures thereof (wherein said at least one polyalkylene glycol contains at least one repeating unit which is a branched methyl group, at least one of said The at least one acid is linear, and if the at least one polyalkylene glycol contains only linear repeating units, at least one of the at least one acid is Branching),
The engine lubricant according to any one of claims 1 to 7, which is selected from the group consisting of:

Where the diester is derived from a dibasic acid or anhydride thereof and a primary alcohol, the diester contains 17 to 36 carbon atoms or is derived from a monobasic acid and a polyalkylene glycol. 9. The engine lubricant of claim 8, wherein the diester contains 17 to 40 carbon atoms.

The reaction product of dicarboxylic acid and alcohol is either a reaction product of a branched acid and a linear alcohol, or a reaction product of a linear acid and a branched alcohol, and a monocarboxylic acid and The reaction product of the polyalkylene glycol is a reaction product of a branched acid and polyethylene glycol, or a linear acid and polypropylene glycol or polybutylene glycol, or those containing at least one ethylene glycol repeating unit. The engine lubricant according to claim 8 or 9, which is any one of a reaction product with a copolymer.

The engine lubricant of claim 10, wherein the polyalkylene glycol has an average relative molecular mass in the range of 150-300.

The engine lubricant according to any one of claims 8 to 11, wherein the branched acid is branched at a beta position and / or does not contain a gem branched group.

The engine lubricant according to any one of claims 1 to 12, comprising 15% by mass or less of the additive.

Use of an engine lubricant according to any one of claims 1 to 13 in lubricating a four-stroke engine.

A method of lubricating a four-stroke engine comprising lubricating a four-stroke engine with an engine lubricant according to any one of claims 1-12.