Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Thickener, grease, method for producing thickener, method for producing grease, and greased bearing

A manufacturing method and a thickener technology, which are applied in the field of lubricating grease, can solve problems such as not being able to meet high-temperature and high-speed durability, achieve excellent high-temperature and high-speed durability, and improve high-temperature and high-speed durability.

Inactive Publication Date: 2012-11-14
NTN CORP
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even with the thickener described in Patent Document 4, there is a problem that performance such as high-temperature high-speed durability cannot be satisfied in recent years.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thickener, grease, method for producing thickener, method for producing grease, and greased bearing
  • Thickener, grease, method for producing thickener, method for producing grease, and greased bearing
  • Thickener, grease, method for producing thickener, method for producing grease, and greased bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Grease was prepared using base oil and thickener raw materials according to the compounding ratio shown in Table 1. It should be noted that, as shown in the lower part of Table 1, MORESCO-HILUBE LS150 (150mm 2 / s(40℃)), the ester oil is HATCOL H3855 (148mm 2 / s(40℃)), the ionic liquid uses OMI-TFSI (91mm 2 / s(20℃)).

[0101] MDI (diphenylmethane-4,4'-diisocyanate) and phthalic anhydride are dissolved in acetone and dimethylacetamide solvent, and triethylenediamine is added as a catalyst. In terms of molar ratio, the blending amount of phthalic anhydride is twice that of MDI.

[0102] The mixed solution was reacted at 50° C. for 24 hours, and the obtained reaction product was washed with a large amount of acetone and dried to obtain a powdery compound. Confirmed by infrared spectroscopic analysis: the compound is at about 1780cm -1 There is imide ring based absorption.

[0103] All the obtained powdery compounds were added to 50 g of ether oil, stirred, and then ro...

Embodiment 2～ Embodiment 6

[0105] Grease was prepared using base oil and thickener raw materials according to the compounding ratio shown in Table 1.

[0106] The MDI and acid anhydride are heated and dissolved in the base oil, and triethylenediamine or tetraethylenediamine is added as a catalyst. In terms of molar ratio, the compounding amount of acid anhydride is twice that of MDI.

[0107]The base oil solution was reacted at 90-150°C for 10 hours, and the resulting base grease was passed through a roll mill to obtain a semi-solid grease. In addition, in Example 5, after adding sodium sebacate as an antioxidant and stirring, it passed the roll mill. Table 1 shows the measurement results of the mixed consistency of the obtained grease. In addition, the following high-temperature, high-speed durability tests were performed, and the results are shown in Table 1 together.

Embodiment 7

[0109] Grease was prepared using base oil and thickener raw materials according to the compounding ratio shown in Table 1.

[0110] Dissolve 21.9 g of DDE (4,4'-diaminodiphenyl ether) in 100 g of dimethylacetamide solvent, cool the solution to 0°C, and add 11.9 g of powdered PMDA (pyromellitic anhydride) to the solution. g, a clear solution was obtained. In terms of molar ratio, the compounding amount of DDE is twice that of PMDA. 16.2 g of phthalic anhydride was added to this solution, and it stirred well. Then, the temperature of the solution was raised to 120° C., and it was allowed to react at this temperature for 1 hour, whereby a precipitate was obtained. The precipitate was washed with a large amount of acetone and dried to obtain a powdery compound. Confirmed by the results of infrared spectroscopic analysis: the compound is at about 1780cm -1 There is imide ring based absorption.

[0111] All the obtained powdery compounds were added to 50 g of ether oil, and rol...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Provided are a thickener with which it is possible to produce a grease having superior high-temperature and high-speed durability, a grease containing the thickener, a method for producing the thickener, a method for producing the grease, and a greased bearing in which the grease is sealed. A grease 7 sealed in a greased bearing 1 is obtained by adding a thickener containing the compound represented by formula (1) or formula (2) to a base oil. In formulas (1) and (2), R1 is a residue of a diamine or diisocyanate; R2 is a residue of a dicarboxylic acid wherein two adjacent carbon atoms form an imide ring, or a derivative thereof; R3 is a residue of a tetracarboxylic acid or derivative thereof; R4 is a hydrogen atom or residue of a monoamine or a monoisocyanate; and n is an integer of 0 to 5.

Description

technical field [0001] The present invention relates to a novel thickener, a grease containing the thickener, a method for producing them, and a grease-packed bearing in which the grease is sealed. In particular, it relates to a grease used for encapsulation in a bearing used under high-temperature and high-speed rotation, such as electrical equipment sub-machines used in an engine room of a home appliance, industrial equipment, and an automobile, and the grease-enclosed bearing. Background technique [0002] Enclosed with grease to impart lubricity to rolling bearings installed in various electrical installation accessories, industrial equipment, etc. This grease is obtained by kneading a base oil, a thickener, and additives used as needed. As the base oil, synthetic lubricating oils such as mineral oil, ester oil, silicone oil, and ether oil are generally used. As the thickener, metal soaps such as lithium soap or urea compounds are generally used. In addition, as additi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C10M115/08F16C19/06F16C33/66C10N30/06C10N30/08C10N40/02C10N50/10
CPCC10M2215/1026C10M2207/2805C10M119/24C10M123/04C10M2207/0406C10N2220/04C10M115/08C10M2217/0456F16C33/6633C10N2230/08C10M2205/0285C10N2240/02C10M2203/1006C10N2220/022C10N2250/10F16C19/06C10N2020/02C10N2020/077C10N2030/08C10N2040/02C10N2050/10
Inventor 川村隆之
Owner NTN CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com