摘要:
To provide hexaester of bispentaerythritol monoformal, which is a mixed ester of bispentaerythritol monoformal represented by the following formula (I), and carboxylic acids: wherein the carboxylic acids comprise C9 branched aliphatic monocarboxylic acid, and any one of carboxylic acids selected from C4 to C8 aliphatic monocarboxylic acids. The hexaester is used as one component of a refrigerant oil composition, and gives excellent characteristics, such as oxidation stability, lubricity, and low temperature properties, to a refrigerant oil composition.
摘要:
A pentaerythritol tetraester which is a mixed ester of pentaerythritol and carboxylic acids is provided, wherein the carboxylic acids comprise isobutyric acid and 2-ethylhexanoic acid and the molar ratio of isobutyric acid to 2-ethylhexanoic acid in the carboxylic acids is 36/64 to 83/17. The pentaerythritol tetraester may be used in a refrigerant oil or the like which exhibits excellent miscibility with a difluoromethane refrigerant among other properties.
摘要:
The present invention relates to a method for producing a glycopeptide comprising steps of: denaturing the Fc region of an avian antibody; and degrading the denatured Fc region with a proteolytic enzyme; wherein the glycopeptide is a glycodipeptide or glycotripeptide.
摘要:
The present invention provides a refrigerating-machine oil composition which comprises the following ester additive (a) and the following ester base oil (b), the content of the ester additive (a) being 5-45 mass % with respect to the total amount of the refrigerating-machine oil composition. Ester additive (a): At least one ester of isotridecanoic acid with pentaerythritol Ester base oil (b): Polyhydric-alcohol esters comprising esters of two or more aliphatic monocarboxylic acids selected from among C4-9 aliphatic monocarboxylic acids with pentaerythritol.
摘要:
Provided is a refrigerating machine oil which comprises an ester between a polyol consisting of at least one of pentaerythritol and dipentaerythritol represented by formula (I) and 2-propylheptanoic acid, and is characterized in that the refrigerating machine oil can be used in combination with a refrigerant consisting of 1,3,3,3-tetrafluoropropene (HFO-1234ze). When the refrigerating machine oil is used in combination with a refrigerant consisting of HFO-1234ze, excellent miscibility with the refrigerant, lubricity, thermal and chemical stability and the like can be achieved.
摘要:
Provided is hexaester of bispentaerythritol monoformal, which comprises the bispentaerythritol monoformal represented by the following formula (I), and any one of carboxylic acids selected from C8 and C9 branched aliphatic monocarboxylic acids: The hexaester has well-balanced excellent characteristics, such as low temperature properties and oxidation stability, and is used for industrial lubricating oil, such as a refrigerant oil composition.
摘要:
An additive for oils that is capable of imparting oils such as lubricant base oils with superior wear resistance properties or friction resistance properties, and a lubricant. An additive for oils that includes a compound represented by formula (I) is used. A and B each represents a single bond or hydrocarbylene or the like, X and Y each represents a sulfur atom or single bond, and W and Z each represents a hydrogen atom or —NR1R2 or the like, provided that W and Z are not both hydrogen atoms. R1 and R2 each represents a hydrogen atom, a hydrocarbyl or a hydrocarbylcarbonyl or the like, and n and m each represents an integer of 0 to 5.
摘要翻译:能够赋予润滑油基础油等润滑油基油优异的耐磨损特性或耐摩擦性能的油添加剂和润滑剂。 使用包含由式(I)表示的化合物的油的添加剂。 A和B各自表示单键或亚烃基等,X和Y各自表示硫原子或单键,W和Z各自表示氢原子或-NR 1 R 2等,条件是W和Z不都是 氢原子。 R 1和R 2各自表示氢原子,烃基或烃基羰基等,n和m各自表示0〜5的整数。
摘要:
A method for producing 3,5,5-trimethylhexanal by allowing diisobutylene (DIB), carbon monoxide and hydrogen to react with one another in the presence of a cobalt-based catalyst, comprising: a step of allowing DIB to react with carbon monoxide and hydrogen in the presence of a cobalt-based catalyst until a convention of DIB reaches 50 to 85% (first stage reaction step); a step of separating unreacted DIB from a reaction product obtained in the first stage reaction step (unreacted DIB separation step); and a step of allowing the unreacted DIB separated to react with carbon monoxide and hydrogen in the presence of a cobalt-based catalyst (second stage reaction step).
摘要:
Provided is a refrigerating machine oil composition for a mixed refrigerant comprising difluoromethane, the composition comprising a polymer (A) below and an ester (B) of polyhydric alcohol(s) with aliphatic monocarboxylic acid(s).The polymer (A): a polymer which is obtained by polymerizing monomer(s) consisting of at least one monomer of monosubstituted ethylenes and disubstituted ethylenes, and in which a ratio of a monomer represented by the following general formula (I): wherein R1 represents an alkyl group having 1 to 14 carbon atoms, R2 represents hydrogen or an alkyl group having 1 to 4 carbon atoms, and the sum of carbon numbers in R1 and R2 is 2 to 14, is 75 to 100% by mass based on a total mass of monomers constituting the polymer.
摘要:
Provided are an ester of isotridecanoic acid and pentaerythritol, etc., wherein (i) the kinematic viscosity at 40° C. is in the range of 80-140 mm2/sec. and (ii) the number of terminal methyl groups per molecule of isotridecanoic acid in the isotridecanoic acid obtained by 1H-NMR measurement is in the range of 2.6-3.4 on average.