JP2000514853A - Lubricants containing alkyl-substituted naphthalenes and esters - Google Patents

Abstract

  (57) [Summary] A lubricant containing an alkyl-substituted naphthalene and an ester.

Description

DETAILED DESCRIPTION OF THE INVENTION              Lubricants containing alkyl-substituted naphthalenes and esters   The present invention relates to a lubricant containing an ester. More specifically, The present invention relates to a hot chain oil having improved volatility and functional life. You.   Drive chains, particle board presses, tenter frames Lubricant compositions used in tenter frames must have stable viscosity. I need it.   Traditional lubricants containing esters have been used at the high temperatures experienced by esters. Due to viscosity changes, it was not satisfactory for use in drive chains at high temperatures. Poly Compositions using alpha-olefins are similar to those experienced with esters. Oil that does not show the same viscosity change, but contains polyalphaolefin Is likely to be unsatisfactory due to its tendency to produce varnish under ambient conditions Was called. Other disadvantages of previous lubricants are unacceptable volatilization Degree and inadequate functional life.   The present invention provides a lubricant composition containing an ester containing an alkyl-substituted naphthalene. This overcomes the above disadvantages and other disadvantages.   One object of the present invention is to provide a drive chain and other chain mechanisms that operate in a high temperature environment. It is to provide a lubricant with improved viscosity properties that can be used.   It is another object of the present invention to provide a high temperature at elevated temperature with improved volatile properties and extended functional life. Is to provide a chain oil.   The lubricant composition according to the present invention contains an alkyl-substituted naphthalene and an ester Things. When we say alkyl-substituted naphthalene, one with various lengths Or a naphthalene substituted with two or more linear or branched alkyl groups It is considered something.   One or more alkyl-substituted naphthalenes in a lubricant composition containing an ester The inclusion of compounds not only reduces the overall volatility of the oil, but also the functional life of the oil. Unexpected improvements occur, such as extending lives.   The present invention relates to an alkyl-substituted naphne in an amount sufficient to improve the volatility of the lubricant composition. Contains taren. Alternatively, the invention is directed to extending the functional life of the lubricant. Contains a small amount. Generally, the alkyl-substituted naphthalenes comprise about 1 to about 1% of the lubricant composition. From 0% to about 50% by weight, or alternatively from about 12% to about 30% by weight. Is composed. Unless otherwise stated, the amounts of ingredients anywhere in this specification are Expressed as a percentage by weight of the total composition.   Esters which can be used in this invention are Kirk Osmer's encyclopedia. Pedia, of, Chemical, Technology (4th edition of 1994), Vol. 9, 78 Since it is disclosed on page 1-812, it is incorporated herein by reference. Further More specifically, the present invention relates to diesters, phthalates, trimellitates, Contains Retain, Dimer Acid Ester, Polyol and Polyolate You may. Trimellitic acid esters and polyols are considered to be particularly suitable. It is. In some embodiments, the ester comprises from about 40% to about 90% by weight of the lubricant composition. % By weight, or alternatively from about 50% to about 80% by weight. You. Example   The following examples provide a basis for understanding the nature of the invention, It is not intended to limit the scope of the invention. The examples below have various grades of viscosity. 3 illustrates different embodiments of the present invention.                                                 Example 1 Example 2       Emkarate 9130 70% 63.4%       Mobil MCP968 15% 18%       Indopol H-1900-16%       Parapol 13.00 13%-       Irgalube 349 0.6% 0.6%       Irganox L06 0.6% 1%       Vanlube SS 0.4% 0.6%       Nasul 707 0.4% 0.4%   Emcalate 9130 is a commercial product sold by ICI Chemical Polymer. It is a melitate ester. Mobil MCP968 is a mobile, chemical, A mixture of dialkyl and trialkyl naphthalenes sold by Pany You. Parapol 1300 and Indopol H-1900 are polybutene polymers is there. Ilgarve 349 is a wear resistant product sold by Ciba Geigy PLC It is an additive. Irganox L06 is also available from Ciba Geigy PLC Is an antioxidant. VANLUBE SS is RT Vanderbilt, Chemical, It is an antioxidant sold by Corporation. Finally, Nasar 707 Is an anticorrosive sold by King, Industries.   In the commercial production of the embodiment described as Example 1, the amount of emca Rate 9130 and Mobil MCP 968 together at about 70 ° C. to about 85 ° C. Heat to temperature. Then, Paraball 1300 (or Indopol H-1900) ), Irganox L06 and Banlube SS are mixed to form a mixture. Il Since GANOX L06 and Banlube SS are powders, they must be melted in a mixture. In addition, the mixture is completely Irganox L06 and Vanlube SS Mixed Must be mixed until dispersed in the compound. Then, the temperature of the composition Lower to about 60 ° C. and mix Irgarbe 349 and Nasal 707 in the composition You.   A sample of the lubricant composition in the above-described example is outlined in the previous paragraph. It is manufactured according to the steps described above. To evaluate the volatility of the composition Sampling in instruments specially designed for thermogravimetric analysis by TA Instruments The sample was placed at a constant temperature and the isothermal evaporation of several samples was measured. In the results below , “T90” indicates that 10% by weight of the original sample had evaporated (ie, 9% of the sample). 0% by weight) time and "t50" is 50 weight of the original sample Represents the time at which the% has evaporated (ie, 50% by weight of the sample remains). You.                                       Example 1 Example 2        200 ° C t90> 10 hours> 10 hours                    t50> 10 hours> 10 hours        225 ° C t90 2.2 hours 3.5 hours                    t50> 10 hours> 10 hours        250 ° C t90 0.60 hours 1.3 hours                    t50 3.3 hours 5.5 hours        275 ° C t90 0.31 hours 0.35 hours                    t50 1.3 hours 1.3 hours   This test result demonstrates the useful and improved evaporation characteristics of the present invention.   The advantage of this invention is that the evaporation characteristics of Example 1 are The comparison was made with the evaporation characteristics of a sample containing no compound (composition B). I will tell. Composition B consists of:       Emcalate 9130 85%       Mobil MCP968-       Parapole 1300 13%       Ilgarbe 349 0.6%       0.6% of Irganox L06       Banlube SS 0.4%       Nasal 707 0.4%   Composition B comprises Mobil MCP968 (a dialkyl and trialkyl naphthalene) Mixture) instead of emcalate 9130 (trimellitic acid ester) Except for the point, it contains the same components as in Example 1 in the same amounts. Example 1 and composition Isothermal scans were performed at four different temperatures on 10-12 mg of the B sample. The results below show that at all four temperatures 50% by weight of the original sample evaporated (I.e., 5% by weight of the sample remains).                                        Example 1 Composition B        225 ° C t50> 10 hours 7 hours        250 ℃ t50 3.3 hours 2.4 hours        275 ° C t51 1.4 hours 0.6 hours        300 ° C t50 0.25 hours 0.20 hours   At any test temperature, the lubricant of Example 1 had 50% of the lubricant absent. It took a long time to evaporate to some extent. The result is It shows that the improvement of the invention is observed over a wide temperature range.   The lubricant composition of the present invention meets the requirements for use in drive chain applications at high temperatures. It is noteworthy that it can be done. However, this invention also has low volatility. Of course it is suitable for all lubricant applications where power and long service life are desired Also suitable for other applications such as gears and air compressors.   The above specification, examples and data have been used to understand and use the invention described herein. It provides the basis for However, within this range, this The obvious embodiments are included within the spirit and scope of the invention.

[Procedure of Amendment] Article 184-8, Paragraph 1 of the Patent Act [Submission date] September 18, 1998 (September 18, 1998) [Correction contents]                            Amended claims 1. A chain lubricant comprising an alkyl-substituted naphthalene and an ester. 2. from about 10% to about 50%, preferably about 12% by weight of the lubricant;   Containing up to about 30% by weight of an alkyl-substituted naphthalene,   The chain lubricant according to claim 1. 3. If the lubricant is diester, phthalate, trimellitate, pyromellitate,   At least one selected from imer acid esters, polyols and polyoleates   3. The chain lubricant according to claim 1, wherein the at least one ester comprises at least one ester.   Lubricant. 4. If the lubricant is from about 40% to about 90% by weight, preferably about 50% by weight.   4. The composition of any of claims 1-3, wherein the ester comprises up to about 80% by weight of an ester.   The chain lubricant according to any one of the above items. 5. Chain conduction, particle board press, tenter frame and stenter frame   Use of the chain lubricant according to any one of claims 1-4 as a system lubricant . 6. In order to reduce the volatility of the lubricant at high temperatures, it is recommended that   Use of alkyl-substituted naphthalenes in the industry.

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Claims (1)

[Claims] 1. A lubricant containing an alkyl-substituted naphthalene and an ester. 2. from about 10% to about 50%, preferably about 12% by weight of the lubricant;   Containing up to about 30% by weight of an alkyl-substituted naphthalene,   The lubricant according to claim 1. 3. If the lubricant is diester, phthalate, trimellitate, pyromellitate,   At least one selected from imer acid esters, polyols and polyoleates   The lubricant according to claim 1, further comprising one ester.   . 4. If the lubricant is from about 40% to about 90% by weight, preferably about 50% by weight.   4. The composition of any of claims 1-3, wherein the ester comprises up to about 80% by weight of an ester.   The lubricant according to any one of the above items. 5. Chain conduction, particle board press, tenter frame and stenter frame   Use of the lubricant according to any one of claims 1 to 4 as a lubricant for the system. 6. Reduce the volatility of lubricants at elevated temperatures by reducing the   Use of alkyl-substituted naphthalenes.