The present invention generally relates to lubricating oil compositions useful for reducing NOACK volatility in finished lubricating oils of an internal combustion engine. Also disclosed is a method for reducing NOACK volatility in finished lubricating oils in said engine.

A lubricant comprising 2,5-(bishydroxymethyl) tetryhydrofuran dialkanoates This invention relates to a lubricant comprising a THF ester of the formula (I) as defined below. This invention further relates to a use of the THF ester as lubricant; and to a method for reducing friction between moving surfaces comprising the step of contacting the surfaces with the lubricant or with the THF ester.

A lubricant comprising 2,5-(bishydroxymethyl) tetryhydrofuran dialkanoates This invention relates to a lubricant comprising a THF ester of the formula (I) as defined below. This invention further relates to a use of the THF ester as lubricant; and to a method for reducing friction between moving surfaces comprising the step of contacting the surfaces with the lubricant or with the THF ester.

The present application relates to metal cutting, and more particularly to a cutting fluid and a preparation method and an application thereof, especially the application in the processing of niobium-tungsten alloy (NB521). The preparation method of the cutting fluid is simple and requires low production cost. In the mechanical processing of niobium-tungsten alloy (NB521), the cutting fluid has good cooling performance, lubricity, load-bearing capacity, friction reduction and vibration absorption, and long service life. It also can effectively avoid built-up edges, thereby improving the service life of cutting tools and the processibility of materials. Therefore, products of good quality are produced to improve the yield, especially in the deep hole machining, and thus the cutting fluid of the present application is suitable for a wide range of applications.

Provided are: a lubricating oil composition that contains a base oil (A) containing an alkylnaphthalene (A1) and an ester compound (A2), wherein the content ratio of the component (A1) to the component (A2) [(A1)/(A2)] is 15/85 to 85/15 as a ratio by mass, and a tenter device using the lubricating oil composition. The lubricating oil composition has a small evaporation loss, has a suppressed amount of evaporation, maintains good fluidity and hardly causes adherence of residue even in long-term use in high-temperature environments.

Provided are: a lubricating oil composition that contains a base oil (A) containing an alkylnaphthalene (A1) and an ester compound (A2), wherein the content ratio of the component (A1) to the component (A2) [(A1)/(A2)] is 15/85 to 85/15 as a ratio by mass, and a tenter device using the lubricating oil composition. The lubricating oil composition has a small evaporation loss, has a suppressed amount of evaporation, maintains good fluidity and hardly causes adherence of residue even in long-term use in high-temperature environments.

A method of lubricating metal articles (6), in particular those made of steel, comprising the application (4) of a dispersion comprising a lubricant oil and a lubricant powder to an article to be drawn. A drawing method comprising the lubrication as described above and a lubricant dispersion.

A method of lubricating metal articles (6), in particular those made of steel, comprising the application (4) of a dispersion comprising a lubricant oil and a lubricant powder to an article to be drawn. A drawing method comprising the lubrication as described above and a lubricant dispersion.

Disclosed herein are processes for the preparation of compounds of formula (I) from one or more bio-derived reactants, and their use as base oils:

(R.sub.1-A).sub.b-(CH.sub.x).sub.a(CHR.sub.2).sub.m(C(R.sub.4R.sub.5)).sub.n(CHR.sub.3).sub.o(CH.sub.y).sub.c-(A-R.sub.1).sub.d(I)

wherein a and c are independently 0 or 1, b and d are independently 1 or 2, x and y are independently 1 or 2, dependent upon the values of a-d, m and o are independently 0 or 1, n is an integer of 0-6, and each A is independently an unsaturated furan ring, a partially saturated furan ring, a saturated furan ring, or (CH.sub.2).sub.4. Also, R.sub.1, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are independently selected from the group consisting of H and alkyl groups having 1 to 18 carbon atoms, with a proviso that at least one of R.sub.2, R.sub.3, R.sub.4, and R.sub.5 is not hydrogen, and the total carbon content of the compound of formula (I) is in the range of 20-62.

Disclosed herein are processes for the preparation of compounds of formula (I) from one or more bio-derived reactants, and their use as base oils:

(R.sub.1-A).sub.b-(CH.sub.x).sub.a(CHR.sub.2).sub.m(C(R.sub.4R.sub.5)).sub.n(CHR.sub.3).sub.o(CH.sub.y).sub.c-(A-R.sub.1).sub.d(I)

wherein a and c are independently 0 or 1, b and d are independently 1 or 2, x and y are independently 1 or 2, dependent upon the values of a-d, m and o are independently 0 or 1, n is an integer of 0-6, and each A is independently an unsaturated furan ring, a partially saturated furan ring, a saturated furan ring, or (CH.sub.2).sub.4. Also, R.sub.1, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are independently selected from the group consisting of H and alkyl groups having 1 to 18 carbon atoms, with a proviso that at least one of R.sub.2, R.sub.3, R.sub.4, and R.sub.5 is not hydrogen, and the total carbon content of the compound of formula (I) is in the range of 20-62.