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

Complex-calcium-based tetrapolyurea lubricating grease and preparation method thereof

A technology of calcium-based tetrapolyurea grease and composite calcium-based grease, which is applied in lubricating compositions, petroleum industry, thickeners, etc., can solve the problems of poor comprehensive performance of calcium-based polyurea grease, and achieve excellent Comprehensive performance, overcoming hardening, and avoiding the effect of strong volatilization

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the hardening problem that complex calcium base grease exists, those skilled in the art try to introduce polyurea grease in complex calcium base grease, for example, CN1364859A and CN1657599A disclose respectively by introducing dipolyurea in complex calcium base grease And the obtained calcium-based polyurea grease, however, the overall performance of these calcium-based polyurea greases is not good

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
  • Complex-calcium-based tetrapolyurea lubricating grease and preparation method thereof
  • Complex-calcium-based tetrapolyurea lubricating grease and preparation method thereof
  • Complex-calcium-based tetrapolyurea lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The invention provides a preparation method of composite calcium-based tetrapolyurea grease, the method comprising the following steps:

[0019] (1) In the presence of lubricating base oil, contact and react calcium hydroxide, higher fatty acids and dibasic aromatic acids, heat up and dehydrate the mixture obtained after the reaction, and then cool down to 70-80°C to obtain complex calcium-based grease ;

[0020] (2) Add diisocyanate and diamine in sequence to the complex calcium-based grease, add monoamine after mixing and contacting for at least 5 minutes, heat up to 100-120°C for contact reaction, and heat up the mixture obtained after the reaction to refine , wherein the molar ratio of the amount of diisocyanate, diamine and monoamine is (1.9-2.1): 1: (1.9-2.1).

[0021] According to the method of the present invention, in step (1), the lubricating grease obtained after dehydration is cooled to 70-80° C., and in step (2), monoamine is added after adding diisocyanat...

Embodiment 1

[0055] This example is used to illustrate the complex calcium-based tetrapolyurea grease of the present invention and its preparation method.

[0056] Raw material components: naphthenic oil (purchased from China National Offshore Oil Corporation, viscosity at 100°C is 12mm 2 / s): 835g; Terephthalic acid: 30g; Ca(OH) 2 : 22g; 12-hydroxystearic acid (purchased from Tongliao Weining Chemical Co., Ltd.): 60g; octadecylamine (purchased from ACROS): 31.87g; ethylenediamine: 3.56g; Phenylmethane diisocyanate (MDI): 29.58g; Tungsten disulfide: 8g; Selenium disulfide: 12g; Graphite fluoride: 10g; Diisooctyldiphenylamine: 8g; Zinc naphthenate: 10g.

[0057] Mix 500g of naphthenic oil with 60g of 12-hydroxystearic acid and 30g of terephthalic acid, stir evenly, raise the temperature to 80°C, add dropwise a milk of lime solution containing 22g of calcium hydroxide, stir and saponify quickly for 60 minutes, Raise the temperature to 105°C, and after dehydration, cool down to 80°C to obta...

Embodiment 2

[0067] This example is used to illustrate the complex calcium-based tetrapolyurea grease of the present invention and its preparation method.

[0068] Composite calcium-based tetrapolyurea grease was prepared according to the method of Example 1, except that terephthalic acid was replaced with the same molar amount of isophthalic acid to obtain composite calcium-based tetrapolyurea grease.

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

The invention relates to a complex-calcium-based tetrapolyurea lubricating grease and a preparation method thereof. The preparation method comprises the steps that: (1) under the existence of a lubricating base oil, calcium hydroxide, higher fatty acid, and binary aromatic acid are subjected to contact reaction; a mixture obtained after the reaction is subjected to heating dehydration, and is cooled to 70-80 DEG C, such that complex-calcium-based lubricating grease is obtained; (2) diisocyanate and diamine are sequentially added into the complex-calcium-based lubricating grease, and mixed contact is allowed for at least 5min; monoamine is added, and the mixture is heated to 100-120 DEG C, such that contact reaction is carried out; and a mixture obtained after the reaction is heated and refined. A dose molar ratio of diisocyanate to diamine to monoamine is (1.9-2.1):1:(1.9-2.1). The complex-calcium-based tetrapolyurea lubricating grease provided by the invention has excellent comprehensive performance.

Description

technical field [0001] The invention relates to a method for preparing composite calcium-based tetrapolyurea grease and the composite calcium-based tetrapolyurea grease prepared by the method. Background technique [0002] Polyurea grease (referred to as polyurea grease) is a grease prepared by thickening base oil with organic compounds containing urea groups in the molecule. Since the polyurea thickener is different from the metal soap-based thickener, it does not contain metal ions, which avoids the catalytic oxidation of the metal ions in the soap-based thickener to the grease base oil, so the polyurea grease has good oxidation stability. Excellent performance and thermal stability, making polyurea grease more suitable for lubrication under high temperature conditions. [0003] At present, the reports of articles and patents mainly focus on the preparation and synthesis of dipolyurea grease. The shear stability of dipolyurea grease is poor, and the difference between 100...

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 Patents(China)
IPC IPC(8): C10M123/02C10M169/06C10M177/00
Inventor 王佳孙洪伟何懿峰刘磊翟浩川段庆华刘中其姜靓
Owner CHINA PETROLEUM & CHEM 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