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Process for producing lubricating grease

A technology for lubricating grease and lubricating oil, applied in lubricating compositions, petroleum industry, thickeners, etc., can solve the problems of unacceptable batch process, inflexible continuous process, etc., achieve excellent consistency and high uniformity, avoid Storage cost, effect of simple implementation

Inactive Publication Date: 2007-04-04
ROHMAX ADDITIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are not recognized relative to batch processes
It is conceivable that the reason for this is that continuous processes are relatively inflexible

Method used

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  • Process for producing lubricating grease
  • Process for producing lubricating grease
  • Process for producing lubricating grease

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0265] In a 2-liter four-necked flask equipped with a stirrer, a thermometer and a reflux condenser, 70.3 g of ethylene-propylene copolymer was weighed and its thickening effect was relative to KV 100 (such as thermally or mechanically degraded Dutral  CO 038) is 11.0mm 2 / s, into a mixture consisting of 251.8 g of 150N oil and 47.9 g of 100N oil, which was dissolved at 100°C within 10-12 hours. After the dissolution process, 41.1 g of a mixture of alkyl methacrylates with chain length C10-C18 alkyl substituents were added, and the reaction mixture was inertized by adding dry ice. After the polymerization temperature reached 130° C., 0.52 g of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane was added, and at the same time, starting from 588.9 g of a similar composition as above and 7.66 A monomer feed consisting of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane was added uniformly over a 3.5 hour feed time. 2 hours after the addition was complete, the mixture was...

preparation Embodiment 2

[0267] Preparation of PAMA / methacrylic acid polymer

[0268] In a 2-liter four-necked flask equipped with a stirrer, thermometer and reflux condenser, 6.1 g of methacrylic acid and 603.9 g of -C10-C18-alkyl methacrylate were dissolved in 499 g of 100N oil, such as that available from Kuwait Petroleum In the company's 100SN. The solution was inertized by adding 10 g of dry ice and the temperature was subsequently raised to 82°C. After reaching temperature, polymerization was initiated by adding 0.73 g of initiator (tert-butyl per-2-ethylhexylhexanoate). 1.21 g of initiator was added after 4 hours reaction time and 111 g of 100N oil after another 4 hours. The resulting polymer solution was at least 50% concentrated.

[0269] KV 100 (2% concentration in 150N oil): 10.11mm 2 / s

[0270] KV 40 (2% concentration in 150N oil): 58.43mm 2 / s

[0271] [η]136cm 3 / g

preparation Embodiment 3

[0273] Preparation of PAMA polymers without acid functional groups

[0274] Preparation process is similar to preparation example 2

[0275] Batch polymerization, 82°C, 55% concentration in 100N oil

[0276] 495.0g 100N oil

[0277] 605.0g-C12-C18-Alkyl Methacrylate

[0278] 0.73g initiator (0.12%)

[0279] Additional addition step (after 4h): 1.21 g initiator (0.20%)

[0280] Dilute to 50% with 110.0g 100N oil

[0281] KV 100 (2% concentration in 150N oil): 9.98mm 2 / s

[0282] KV 40 (2% concentration in 150N oil): 55.58mm 2 / s

[0283] [η]127cm 3 / g

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Abstract

In a process for producing lubricating grease, a polymer structure improver with a composition which is liquid at 25 DEG C is added to a dispersion having a fat structure and comprising at least one thickener and at least one lubricating oil.

Description

technical field [0001] The present invention relates to a method of preparing lubricating grease. Background of the invention [0002] Greases are known per se and are often used. Greases, hereinafter also referred to as "greases", are solid to semi-liquid substances which are formed by dispersing a thickener in a liquid lubricant. Other additives may be present to impart special properties. [0003] The base consistency of a grease is determined by the combination of base liquid and thickener. The base fluid is usually a base oil commonly used in the lubricant industry, such as mineral, synthetic or vegetable oils. [0004] The thickeners used are typically alkali metal soaps or alkaline earth metal soaps. Also known are non-soap-based thickeners, such as bentonites (clay-based) or polyureas. [0005] Grease production is the result of physicochemical processes by which the grease structure is built up from thickener molecules generated in situ. In summary, at least 2...

Claims

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Application Information

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IPC IPC(8): C10M169/06C10M177/00C10M123/04
CPCC10M2205/066C10M169/06C10M2205/02C10M2205/024C10M123/04C10M2205/022C10M2205/046C10M2207/1285C10M2203/1025C10M2209/0813C10M2205/0213C10M2209/086C10M2209/084C10M2205/06C10M2209/0866C10M177/00C10M2205/04C10M129/68
Inventor M·菲舍尔M·舍雷尔M·米勒
Owner ROHMAX ADDITIVES
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