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Water-resistant lubricant for compressors and marine engines

专利摘要

ynthetic lubricants containing (A) 15 to 45 weight percent of an ester of a hindered polyhydric alcohol having 3 to 6 hydroxy groups and 5 to 10 carbon atoms with one or more alkanoic acids having 4 to 18 carbon atoms blended with (B) 85 to 55 weight percent of one or more polyoxyalkylene glycols or their mono- or dialkyl ethers having a 400-5000 number average molecular weight. The blends are compounded with antioxidants, corrosion inhibitors, and metal deactivators to produce a superior lubricant for rotary screw compressors that has a long life. ......

基本信息

专利类型:
发明专利
申请/专利号:
EP1980101408
申请日期:
1980-03-18
专利申请人:
陶氏化学公司
分类号:
["C10M111/02","C10M111/04","C10M171/00","C10N30/00","C10N40/25","C10N40/30","C10M3/20","C10M3/22"]
发明/设计人:
CARSWELL, ROBERT ， MCGRAW, PHILIP WAYNE
权利要求: 1. A water resistant base lubricant composition for compressor and marine engines characterized in that it contains (A) 15 to 45 weight percent of an ester of a hindered polyhydric alcohol having 3 to 6 hydroxyl groups and from 5 to 10 carbon atoms with one or more alkanoic acids having 4 to 18 carbon atoms, and (B) 85 to 55 weight percent of one or more compositions having a flash point greater than 191°C and having the formulaa where R is hydrogen or an alkyl group of 1-6 carbon atoms, R' is hydrogen or methyl, and n is a number having an average value which will give a molecular weight range from 400 to 5000. 2. The lubricant composition of claim 1 wherein the hindered polyhydric alcohol is pentaerythritol and the polyoxyalkylene glycols of formula I have a number molecular weight range from 700 to 2500. 3. The lubricant composition of Claim 1 or 2 characterized in that the weight percent of the ester ranges from 22 to 35 and the weight percent of the polyglycol ranges from 78 to 65. 4. The lubricant composition of Claim 2 or 3 wherein the glycol is polypropylene glycol having a number average molecular weight of 1200. 5. The lubricant composition of Claim 4 which comprises 30 weight percent of said ester and 70 weight percent of said polypropylene glycol. 6. Finished lubricant composition containing the base composition of Claim 1 and (C) an effective amount of an antioxidant, (D) an effective amount of a ferrous metal corrosion inhibitor, and (E) an effective amount of a metal deactivator. 7. The composition of Claim 6 characterized in that it contains. (C) 0.1 to 5.0 weight percent of an aromatic amine antioxidant, (D) 0.1 to 5.0 weight percent of a metal salt of an aromatic sulfonic acid as corrosion inhibitor, and (E) 0.001 to 0.5 weight percent of a N-heterocyclic metal deactivator; the percentages being based on the total weight of the esters and the glycols.