A kind of asymmetric polystar polymer and its preparation method and application

A star-shaped polymer and polymer technology, applied in lubricating compositions, additives, petroleum industry, etc., can solve problems such as limited scope of application, poor high-temperature thickening ability, etc.
CN107663265BInactive Publication Date: 2019-11-19CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2019-11-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an asymmetrical poly star polymer as well as a preparation method and application thereof, and belongs to the field of a high-molecular polymer. The polymer has a structural general formula of (S1)nT(S2)m, wherein S1 is X1-(EP)a; X1 is polydivinylbenzene cores; EP is polyisoprene arms; a is the arm number; the value range of the a is 3 to 20; S2 is X2-(EB)b; the X2 is polydivinylbenzene cores; EB is polybutadiene arms or the polyisoprene arms; b is the arm number; the value range of the b is 3 to 20; the m and the n are positive integers; the value ranges of the m and the n are both 1 to 20; T is a coupling agent. The invention also provides a preparation method of the asymmetrical poly star polymer. The invention also provides application of the asymmetrical poly star polymer as a lubricating oil viscosity index improving agent. The low-temperature performance is ensured; meanwhile, the high-temperature thickening capability of a viscosity index agent is furtherimproved; the use range is wide; the application to various kinds of basic oil can be realized.
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Description

technical field

[0001] The invention belongs to the field of high-molecular polymers, and in particular relates to an asymmetric multi-star polymer and its preparation method and application. Background technique

[0002] With the rapid development of the machinery industry, higher and higher requirements are put forward for the performance of lubricating oil. As an additive to improve the viscosity-temperature performance of lubricating oil, lubricating oil viscosity indicator (viscosity index agent) can make lubricating oil play a role in various complex environments, thereby improving the reliability and service life of mechanical operation. At present, ethylene-propylene copolymer (OCP) is mainly used in the market, which is mainly due to its readily available raw materials and relatively simple synthesis process. Although the thickening ability of ethylene-propylene copolymer is good, its shear stability and low temperature performance are poor, especially the low temp...

Claims

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