Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic nitrogen compound
Reexamination Certificate
2001-03-13
2002-09-03
McAvoy, Ellen M. (Department: 1764)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic nitrogen compound
C508S487000, C508S579000, C252S008810, C252S077000
Reexamination Certificate
active
06444627
ABSTRACT:
The present invention relates to a lubricant composition and to a method of treating fiber materials.
BACKGROUND OF THE INVENTION
Lubricants and lubricant compositions are known for a wide range of applications, for example as hydraulic fluids, metal working fluids, car brake fluids, and treatment of fibers.
From U.S. Pat. No. 4,409,187 a sealing agent and lubricant for medium-pressure and high-pressure autoclaves is known. It is a polyether polyol which has an average OH-functionality of 5.0 to 7.0 and an average OH number of 250 to 500. The polyether polyol is prepared by reacting ethylene oxide and/or propylene oxide with a mixture of sucrose and at least one other starting molecule which is chosen from a) polyhydric alcohols with an OH-functionality of less than 8, b) monoamines or polyamines which contain at least 2 hydrogen atoms bonded to the amino nitrogen, and c) water.
Chemical Abstracts 100:54321 g, abstracting Japanese Kokai 58-132,090, discloses the use of ammonia- or ethanolamine-polyalkylene glycol condensates as mold-releasing agents for molding apparatus for rubber. These condensates can be blended with a conventional release agent, such as a polypropylene glycol, polyoxypropylene glyceryl ether, polyoxyethylene/polyoxypropylene block copolymer, polyoxypropylene/polyoxyethylene glyceryl ether, polyethylene glycol, silicone oil, animal oil, vegetable oil or mineral oil.
U.S. Pat. No. 4,828,735 discloses an aqueous lubricant composition which contains a first polyether component, a second polyether component, a polyamide component, water and optionally a water-soluble polyalkylene glycol. The first polyether component is the reaction product of 2 to 200 units of one or more alkylene oxides with a monohydric alcohol, a phenol or an amine. The second polyether component is the reaction product of one or more alkylene oxides with a polyhydric alcohol, polyhydric phenol or a polyamine having 2 to 26 carbon atoms. The second polyether component contains 2 to 8 chains, each chain containing from 10 to 3,000 alkyleneoxy groups.
Unfortunately, the disclosed lubricant compositions have a relatively high viscosity and a limited usefulness in some commercially important applications.
U.S. Pat. No. 3,140,198 relates to the treatment of textile materials, particularly fibers and filaments. The U.S. patent discloses that anionic, cationic and non-ionic surface-active agents in admixture with water-insoluble oily or waxy lubricants are used to lubricate the fibers and to reduce static electrification. In the case of textile materials made from synthetic fibers with hydrophobic properties, such as polyolefins, polyamides, polyesters and polyacrylonitriles, difficulties are sometimes experienced because of failure of the above-mentioned processing aids to spread uniformly over the fibers or yarns. The U.S. patent suggests the additional use of siloxane oxyalkylene block or graft copolymers to solve this problem.
Lubricants used for fibers, such as industrial or textile fibers, need to have a high lubricity and a low volatility. During the fiber and yarn production, the fibers and lubricant can reach very high temperatures, such as up to 250° C. The fibers are usually drawn or stretched over heated cylinders which have an even higher temperature. Evaporation or degradation of fiber lubricants which come in contact with such cylinders can usually not be entirely prevented. The use of alkoxylated glycols as fiber lubricants is known, however they often have an undesirably high volatility. High-boiling polyol-esters are used to a large extent as fiber lubricants in view of their thermal stability. Unfortunately, they coke on high temperature cylinders and leave a sticky residue. This requires repeated cleaning of cylinders in fiber or yarn producing machines.
In view of the above-mentioned disadvantages of known lubricants with respect to fiber treatment applications especially, it is one object of the present invention to provide a new lubricant which has a low volatility. It is another object of the present invention to provide a new lubricant which does not leave a substantial amount of sticky residues upon evaporation.
SUMMARY OF THE INVENTION
One aspect of the present invention is a lubricant composition which comprises
a) an optionally esterified or etherified reaction product of i) an alcohol comprising up to 6 hydroxy groups and no heteroatom other than oxygen and ii) one or more alkylene oxides; and
b) a reaction product of i) ammonia or an alkanol amine and ii) one or more alkylene oxides, wherein the average OH-functionality of the reaction products a) and b) is up to about 4.5 and the total number of units derived from alkylene oxide in the reaction product b) is up to about 12.
Another aspect of the present invention is a method of treating a fiber material which comprises the step of applying to the fiber material a lubricant composition comprising
a) an optionally esterified or etherified reaction product of i) an alcohol comprising up to 6 hydroxy groups and no heteroatom other than oxygen and ii) one or more alkylene oxides; and
b) a reaction product of i) ammonia or an alkanol amine and ii) one or more alkylene oxides.
Yet another aspect of the present invention is the use of
a) an optionally esterified or etherified reaction product of i) an alcohol comprising up to 6 hydroxy groups and no heteroatom other than oxygen and ii) one or more alkylene oxides; and
b) a reaction product of i) ammonia or an alkanol amine and ii) one or more alkylene oxides for treating fiber materials.
The combination of the reaction products a) and b) as recited above has a low volatility, considering the volatility of the individual components.
DETAILED DESCRIPTION OF THE INVENTION
The lubricant composition of the present invention and the lubricant composition which is used in the method of the present invention preferably comprise from 70 to 99 percent, more preferably from 80 to 97.5 percent, most preferably from 85 to 95 percent of a) an optionally esterified or etherified reaction product of i) an alcohol comprising up to 6 hydroxy groups and no heteroatom other than oxygen and ii) one or more alkylene oxides and from 1 to 30 percent, more preferably from 2.5 to 20 percent, most preferably from 5 to 15 percent of b) a reaction product of i) ammonia or an alkanol amine and ii) one or more alkylene oxides, the percentages being based on the total weight of the reaction products a) and b).
The reaction products a) and b) comprise units derived from one or more alkylene oxides, preferably ethylene oxide, propylene oxide and/or butylene oxide. If the reaction product a) or the reaction product b) comprises units derived from more than one type of alkylene oxides, these units can be arranged in blocks, however they are preferably arranged randomly.
The reaction product a) preferably comprises from 1 to 100, more preferably from 3 to 50, most preferably from 5 to 20 units derived from alkylene oxide.
An alcohol comprising up to 6 hydroxy groups, preferably from 1 to 4 hydroxy groups, and no heteroatom other than oxygen is used as a starting material for producing the reaction product a). Exemplary of such alcohols are polyhydric alcohols, such as mono-, di- or triethylene glycol, mono-, di- or tripropylene glycol, butane diol, hexylene glycol, octylene glycol, glycerin, trimethylolpropane, pentaerythritol, sorbitol, mannitol, glucose or sucrose; partially etherified polyhydric alcohols, such as a methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl or tert. butyl ether of mono-, di- or triethylene glycol or a methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl or tert. butyl ether of mono-, di- or tripropylene glycol or a fatty alcohol containing from 6 to 20 carbon atoms, preferably from 8 to 18 carbon atoms.
The reaction product a) can comprise up to 6 hydroxy groups or it can be partially or fully esterified or etherified. To achieve esterification or etherification, the reaction product a) comprising up to 6 hydroxy groups can be reacted with known esterification or etherification
Berchtold Peter H.
Siegrist Irene
Dow Global Technologies Inc.
McAvoy Ellen M.
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