Check patentability & draft patents in minutes with Patsnap Eureka AI!

Use of block-copolymeric polyalkylene oxides as friction reducers in synthetic lubricants

A technology of block copolymers and lubricants, which is applied in the field of use of polyoxyalkylene block copolymers as friction reducers in synthetic lubricants, and can solve problems such as increased friction and poor energy efficiency

Inactive Publication Date: 2014-03-12
EVONIK IND AG
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A further disadvantage of an unsuitably matched combination of these additives and base oils is that the tribological system enters the realm of mixed friction even under mild conditions, which leads to a considerable increase in friction
The countermeasure used so far is to use oils with a higher viscosity, for example to increase the lubricant film thickness and thus the load carrying capacity, but this leads to poor energy efficiency

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
  • Use of block-copolymeric polyalkylene oxides as friction reducers in synthetic lubricants
  • Use of block-copolymeric polyalkylene oxides as friction reducers in synthetic lubricants
  • Use of block-copolymeric polyalkylene oxides as friction reducers in synthetic lubricants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Example 1: Synthesis of useful polyoxyalkylenes:

[0093] S1a (octanol-(SO) 3 -(EO) 10 The preparation of the polyether):

[0094] 130.2 g of 1-octanol and 5.25 g of potassium methoxide were placed in a 3 liter autoclave. The reactor was made inert by evacuating and flushing with nitrogen. The contents of the reactor were heated to 115°C with stirring. At an internal temperature of 115° C., 388 g of styrene oxide were added within half an hour. After reaction at 115° C. for 2 hours (after-reation time), 473 g of ethylene oxide was continuously added within 2 hours. The reaction temperature was maintained at 115°C by cooling. At this stage, the internal pressure in the reactor did not exceed 3.5 bar (absolute). After 1 hour, still at 115°C, the reaction was complete, as indicated by no further drop in internal pressure. The internal temperature of the reactor was lowered to 90° C. by cooling, and then volatile components were removed by degassing under reduced pr...

Embodiment 2

[0099] Example 2: Lubricant formulations

[0100] Formulations were made by brief mixing at room temperature.

[0101] Viscosity classification ISOVG-46, polyalkylene glycol having a viscosity index of 196 (hereinafter it is referred to as base oil ISOVGT46) and trimethyl adipate (TMA) were used as the base oil. TMA is mixed with an additive package comprising 4.5% by mass of a viscosity index improver based on PMA (polymethacrylate) and an ep / aw additive with the designation P666 from Infineum (known in the prior art as ep The amount of / aw additive used is about 0.3% by weight); the mixture corresponds to an oil of viscosity class ISO-VG32 and has a viscosity index of 230.

[0102] For comparison, Na-Lube AW6220 (an additive formulation containing phosphorus and nitrogen used as a friction reducer in industrial lubricants from King Industries) was used as a commercially available friction reducer.

[0103] Table 1 : Lubricant formulation (SF) of Example 2 using the block c...

Embodiment 3

[0105] Example 3: Use test

[0106] The surfaces of mating slides contact each other when the surfaces sliding against each other, such as the tooth flanks of a gear, are no longer separated by a film of lubricant. The result is mechanical, adhesive wear. The antiwear agent then reduces friction and in the worst case the surfaces that are in contact with each other bond closely together, resulting in a skin layer with lower shear strength than would be the case with pure metal. Under relatively mild conditions, the additives according to the invention adsorb on metal surfaces and under high stresses significantly reduce friction in the field of mixed friction compared to pure base oils without additives. In the Steiner curve ( figure 1 ) depicts this behavior. The Steinland curve describes the process of friction in the coordinate system. The coefficient of friction is shown on the abscissa and the function of velocity, pressure and viscosity on the ordinate.

[0107] The...

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

PropertyMeasurementUnit
acid valueaaaaaaaaaa
diameteraaaaaaaaaa
viscosity indexaaaaaaaaaa
Login to View More

Abstract

The invention relates to the use of block copolymers containing at least a block of aromatic oxyalkylene groups and a block of nonaromatic oxyalkylene groups as friction-reducing additive and also compositions and lubricant formulations containing the block copolymers of the invention.

Description

technical field [0001] The present invention relates to the use of block copolymers comprising at least aromatic oxyalkylene-based blocks and non-aromatic oxyalkylene-based blocks as friction-reducing additives and compositions and compositions comprising block copolymers according to the invention Lubricant formulations. [0002] The present invention thus relates to the use of block copolymers of polyoxyalkylenes obtained by alkoxylation as friction reducers in synthetic oils, such as polyalkylene glycols used as lubricants. Among other things, lubricants can be used in gearboxes, bearings or engines. Background technique [0003] For the purposes of the present invention, the lubricant is a liquid in order to avoid direct contact of the substrate and the counterbody. The formation of a lubricant film between two surfaces that move relative to each other reduces friction, which can be measured by the coefficient of friction f. The coefficient of friction is defined as t...

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): C10M145/36C10M161/00C10N30/06C10N30/10
CPCC10M2209/1033C10M145/34C10N2230/06C08G65/2609C10M2207/2825C10M2209/107C10N2220/022C10M145/04C10M145/36C10M2209/104C10M2209/084C10M107/04C08G65/331C08L71/00C10N2020/02C10N2030/06C10M2209/105C10M2209/106C10M2209/108
Inventor R·亨泽尔F·舒伯特K·舍内曼B·魏内克特尔T·巴特尔斯P·塞登施蒂克
Owner EVONIK IND AG
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com