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Polymer thickened grease composition and method of making the same

A polymer and grease technology, applied in lubricating compositions, thickeners, petroleum industry, etc., can solve problems such as instability and achieve good mechanical stability

Active Publication Date: 2019-01-18
AB SKF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A problem associated with grease compositions is that they are often not mechanically stable during their intended application

Method used

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  • Polymer thickened grease composition and method of making the same
  • Polymer thickened grease composition and method of making the same
  • Polymer thickened grease composition and method of making the same

Examples

Experimental program
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Embodiment

[0057] By mixing a specific amount of high molecular weight polypropylene (average mw.230,000), low molecular weight polypropylene (average mw.82,000), and base oil (polyalphaolefin (PAO), viscosity 68mm 2 / s), and the mixture was heated to 195°C under nitrogen until complete dissolution of the polypropylene occurred to prepare two grease compositions A and B. The weight ratio of low molecular weight polypropylene to high molecular weight propylene was 19 / 1 in each case. The grease composition thus obtained was then rapidly cooled to room temperature within 30 seconds by pouring the mixture onto a metal plate.

[0058] Grease composition A comprised the following ingredients: 13% by weight polypropylene in PAO 200 (polyalphaolefin base oil), no additives. Grease composition B contained the following ingredients: 13% by weight polypropylene in a mineral oil 68 base oil, and the following additives: 0.5% by weight antioxidant; 2.5% by weight anti-corrosion and 2.5% by weight an...

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Abstract

The present invention provides a method for preparing the final lubricating product, which includes the following steps: (a) at the temperature that is higher than the melting point of the polymer thickener, the mixed polymer thickener and the lubricating base oil areThe existence of a thickener is 11.5‑15.5 % % %, which is based on the total weight of the mixture obtained; (b) the mixture obtained by the cooling step (a);Perform the first mechanical treatment to get the intermediate body lubrication;Lubrication products.The invention also provides a lubricant obtained through the above methods.

Description

technical field [0001] The present invention relates to a method for preparing a polymer thickened grease composition, and to a grease composition. Background technique [0002] Polymer thickened greases and methods for their preparation are known in the art. In US3392119 a grease is described comprising a white mineral oil thickened with a copolymer of ethylene and a homopolymer of polypropylene. In US3850828 a grease composition is described thickened with a polymer mixture comprising polyethylene and atactic polypropylene. In EP0700986 A2 a polymeric thickener for a grease composition is disclosed comprising a mixture of a copolymer or homopolymer of high molecular weight polypropylene and a copolymer or homopolymer of low molecular weight propylene. Furthermore, in EP0942063, grease compositions are described comprising at least one polyolefin component, at least one base oil component and at least one rubber component. [0003] One problem associated with grease comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/02C10M177/00C10N30/06C10N40/02C10N50/10
CPCC10M169/02C10M119/02C10M2205/0213C10M2205/0285C10M177/00C10M2205/024C10N2020/04C10N2020/019C10N2030/68C10N2040/02C10N2040/38C10N2040/40C10N2050/10C10N2070/00C10M2205/022C10M169/06
Inventor D.迈杰
Owner AB SKF
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