润滑科技信息平台

专利摘要

所公开的技术提供了润滑组合物和润滑内燃机的方法,其中该润滑组合物含有润滑粘度的油、一种或多种含金属的无硫烷基酚基清净剂、碱土金属磺酸盐清净剂、聚异丁烯基琥珀酰亚胺分散剂和数均分子量为至少20,000的分散剂粘度调节剂。本发明的润滑组合物可配制为具有较低的HTHS粘度和降低的磷含量,同时提供针对粘着磨损的保护。 ......

基本信息

专利类型:
发明专利
申请/专利号:
US18/205732
申请日期:
2023-06-05
专利申请人:
路博润公司
分类号:
["C10M129/10","C10M135/08","C10M137/06","C10M149/12","C10M161/00","C10N10/04","C10N20/02","C10N20/04","C10N30/02","C10N30/04","C10N40/25"]
发明/设计人:
LOOP, JOHN G. ， RAGUZ, MARY GALIC
权利要求: 1. A low viscosity lubricating composition, comprising:a) an oil having a viscosity of 4.5 to 6.5 cSt;b) up to 0.45 weight percent of one or more metal-containing sulfur-free alkyl-phenol based detergents derived from an alkylphenol in an amount to deliver at least 0.2 wt % alkylphenol-containing soap to the composition;c) one or more alkaline earth metal sulfonate detergents in an amount to deliver at least 0.8 wt % by weight sulfonate soap to the composition; andd) 1 wt % to 4 wt % of one or more polyisobutylene succinimide dispersants; ande) 0.2 wt % to 1 wt % of a mixture of dispersant viscosity modifiers-, wherein the mixture of dispersant viscosity modifiers comprises at least one low molecular weight dispersant viscosity modifier having a number average molecular weight of less than 8,000 and one high molecular weight dispersant viscosity modifier having a number average molecular weight of 60,000 to 100,000;wherein the lubricating composition contains less than 0.2 wt % of a sulfur-coupled phenate detergent and wherein the lubricating composition has a high temperature high shear viscosity measured by ASTM D4683 of less than 3.5 cP at 150° C.2. The composition of claim 1, wherein the lubricating composition contains less than 0.15 wt % of a sulfur-coupled phenate detergent.3. The composition of claim 1, wherein the composition contains 0.2 wt % to 0.8 wt % of the mixture of dispersant viscosity modifiers.4. The composition of claim 1, wherein the sulfur-free alkylphenol-based detergent is selected from alkylene coupled alkylphenol detergents, alkylsalicylate detergents, and combinations thereof.5. The composition of claim 1, further comprising:a metal dialkyl dithiophosphate, wherein about 65 mol % of the alkyl groups have 5 or more carbon atoms, present in an amount to deliver 0.01 to 0.08 weight percent phosphorus to the composition.6. The composition of claim 1, further comprising:a metal dialkyl dithiophosphate, wherein about 75 mol % of the alkyl groups have 5 or more carbon atoms, present in an amount to deliver 0.01 to 0.08 weight percent phosphorus to the composition and wherein the composition comprises 1 wt % to 4 wt % of one or more polyisobutylene succinimide dispersants.7. A method of lubricating a compression ignition internal combustion engine comprising supplying to the engine a low phosphorus lubricant composition comprising:a) an oil having a viscosity of 4.5 to 6.5 cSt;b) up to 0.45 weight percent of one or more metal-containing sulfur-free alkyl-phenol based detergents in an amount to deliver at least 0.2 wt % alkylphenol-containing soap to the composition;c) one or more alkaline earth metal sulfonate detergents in an amount to deliver at least 0.8 wt % sulfonate soap to the composition;d) 1 wt % to 4 wt % of one or more polyisobutylene succinimide dispersants;e) 0.2 wt % to 1 wt % of a mixture of dispersant viscosity modifiers wherein the mixture of dispersant viscosity modifiers comprises at least one low molecular weight dispersant viscosity modifier having a number average molecular weight of less than 8,000 and one high molecular weight dispersant viscosity modifier having a number average molecular weight of 60,000 to 100,000;wherein the composition contains less than 0.2 wt % of a sulfur-coupled phenate detergent and wherein the lubricant composition has a high temperature high shear viscosity measured by ASTM D4683 of less than 3.5 cP at 150° C.8. The method of claim 7, wherein the lubricant composition contains 0.2 wt % to 0.8 wt % of the mixture of dispersant viscosity modifiers.9. The method of claim 7, wherein the sulfur-free alkylphenol-based detergent is selected from alkylene coupled alkylphenol detergents, alkylsalicylate detergents, and combinations thereof.10. The method of claim 7, further comprising:a metal dialkyl dithiophosphate, wherein at least about 65 mol % of the alkyl groups have 5 or more carbon atoms, present in an amount to deliver 0.01 to 0.08 weight percent phosphorus to the composition.11. The method of claim 7, further comprising:a metal dialkyl dithiophosphate, wherein at least about 75 mol % of the alkyl groups have 5 or more carbon atoms, present in an amount to deliver 0.01 to 0.08 weight percent phosphorus to the composition and wherein the composition comprises 1 wt % to 4 wt % of one or more polyisobutylene succinimide dispersants.12. A method of reducing adhesive wear in a compression engine lubricated with a low phosphorus lubricant composition, comprising supplying to the engine a lubricant composition comprising:a) an oil having a viscosity of 4.5 to 6.5 cSt;b) up to 0.45 weight percent of one or more metal-containing sulfur-free detergents derived from an alkylphenol in an amount to deliver at least 0.2 wt % alkylphenol-containing soap to the composition;c) one or more alkaline earth metal sulfonate detergents in an amount to deliver at least 0.8 wt % by weight sulfonate soap to the composition;d) 1 wt % to 4 wt % of one or more polyisobutylene succinimide dispersants; ande) 0.1 wt % to 1 wt % of a mixture of dispersant viscosity modifiers wherein the mixture of dispersant viscosity modifiers comprises at least one low molecular weight dispersant viscosity modifier having a number average molecular weight of less than 8,000 and one high molecular weight dispersant viscosity modifier having a number average molecular weight of 60.000 to 100,000;wherein the lubricant composition contains less than 0.2 wt % of a sulfur-coupled phenate detergent and wherein the lubricant composition has a high temperature high shear viscosity measured by ASTM D4683 of less than 3.5 cP at 150° C.13. The method of claim 12, wherein the lubricating composition comprises less than 0.15 wt % of a sulfur-coupled phenate detergent.14. The method of claim 12, wherein the sulfur-free alkylphenol-based detergent is selected from alkylene coupled alkylphenol detergents, alkylsalicylate detergents, and combinations thereof.15. The method of claim 12, further comprising:a metal dialkyl dithiophosphate, wherein at least about 75 mol % of the alkyl groups have 5 or more carbon atoms, present in an amount to deliver 0.01 to 0.08 weight percent phosphorus to the composition and wherein the composition comprises 1 wt % to 4 wt % of one or more polyisobutylene succinimide dispersants.