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Gradient copolymer and its preparation method and application

A gradient copolymer and polymer technology, applied in the field of polymers, can solve problems such as poor fluidity of base oils

Active Publication Date: 2018-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is known that base oil is an extremely complex mixture of alkanes with different structures, among which normal alkanes and isoparaffins with a lower degree of branching have good viscosity-temperature properties, but they are easy to crystallize at low temperature Precipitate and form a wax crystal network structure, which will cause the fluidity of the base oil to gradually deteriorate as the temperature drops

Method used

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  • Gradient copolymer and its preparation method and application
  • Gradient copolymer and its preparation method and application
  • Gradient copolymer and its preparation method and application

Examples

Experimental program
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Embodiment

[0195] The following examples will be used to illustrate the present invention in further detail, but the present invention is not limited to these examples.

[0196] In the following examples and comparative examples, the respective contents of the copolymer and the diluent oil and the contents of each monomer in the copolymer are calculated according to the feed amount.

[0197] In the context of the present invention, including in the following Examples and Comparative Examples, each measurement method and calculation method were performed as follows.

[0198] 1. Gel permeation chromatography (GPC) resolution method

[0199] Operating instrument: Model 1515 gel permeation chromatography produced by Waters Corporation of the United States. The detector is a Waters 2414 differential refractive index detector. The solvent used to configure the standard is chromatographically pure tetrahydrofuran produced by Acros Company. The chromatographic column is provided by Waters Com...

Embodiment A

[0232] Under the protection of nitrogen, add 113kg of diluent oil (purchased from Ssangyong Company, the brand is 100N, the same below) into the reaction kettle equipped with mechanical stirring, heat to 83-91°C, and 270kg of the first monomer (decyl methacrylate ester / lauryl methacrylate / tetradecyl methacrylate / hexadecyl methacrylate / octadecyl methacrylate mixture, where C 10 = 61%, C 12 = 20%, C 14 = 12%, C 16 = 5%, C 18 =2%, X=11.1), the mixture A of 1.35kg benzoyl peroxide and 1.08kg dodecyl mercaptan is added dropwise in the reactor, simultaneously with the second monomer of 150kg (tetradecyl methacrylate ester / cetyl methacrylate / stearyl methacrylate / eicosyl methacrylate mixture, where C 14 = 27% by weight, C 16 = 42%, C 18 = 24%, C 20 =7% by weight, X=16.0), the mixture B of 0.75kg benzoyl peroxide and 0.6kg dodecylmercaptan was added dropwise in the reaction kettle. At the initial moment of dropping, the ratio A / B of the dropping amount (kg / hour) of mixture A to...

Embodiment B

[0236] Under the protection of nitrogen, add 113kg of diluent oil (purchased from Ssangyong Company, the brand is 100N, the same below) into the reaction kettle equipped with mechanical stirring, heat to 83-91°C, and 50kg of the first monomer (methacrylic acid hexyl ester / octyl methacrylate / decyl methacrylate mixture where C 6 = 71%, C 8 = 21%, C 10 =8%, X=6.6), the mixture A of 0.32kg benzoyl peroxide and 0.21kg dodecyl mercaptan is added dropwise in the reactor, simultaneously with the second monomer of 370kg (dodecyl methacrylate Esters / myristyl methacrylate / hexadecyl methacrylate mixture, where C 12 = 55% by weight, C 14 = 17% by weight, C 16 =28% by weight, X=13.3), 1.8 kg of benzoyl peroxide and 1.5 kg of mixture B of dodecyl mercaptan were added dropwise into the reaction kettle. At the initial moment of dropping, the ratio A / B of the dropping amount (kg / hour) of mixture A and the dropping amount (kg / hour) of mixture B is 7:1, and the sum of the two is 12kg / hour, t...

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Abstract

The invention discloses a gradient copolymer and its preparation method and application. The gradient copolymer comprises n polymer components or is composed of the n polymer components. The n polymercomponents independently represent addition polymers of a monomer shown in the formula (I) and / or their mixture or the n polymer components independently comprise one or more of structural units shown in the formula (I-1) or are composed of one or more of the structural units shown in the formula (I-1). The n represents an integer in the closed interval [5, infinity]. The ith polymer component has the side chain average carbon atom number Xi detected by a nuclear magnetic resonance method, the symbol i represents an integer from 1 to n and the relational expression is X1<X2<...<Xn-1<Xn. The gradient copolymer has excellent lubricating oil depressing efficacy or wide base oil depressing adaptability. In the formula (I) or formula (I-1), the groups and values are defined in the specification.

Description

technical field [0001] The invention relates to the field of polymers, in particular to a gradient copolymer. The present invention also relates to the production method and application of the gradient copolymer. Background technique [0002] At present, energy saving, environmental protection and the advancement of engine technology have become the main driving forces for the development of lubricating oils, which put forward new requirements for the viscosity, viscosity-temperature performance, and low-temperature performance of base oils. It is known that base oil is an extremely complex mixture of alkanes with different structures, among which normal alkanes and isoparaffins with a lower degree of branching have good viscosity-temperature properties, but they are easy to crystallize at low temperature Precipitate and form a wax crystal network structure, which will cause the fluidity of the base oil to gradually deteriorate as the temperature drops. In order to avoid t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C10M145/14
CPCC10M145/14C10M2209/084C08F220/1818C10N2030/02C08F220/1811C08F220/1812C08F220/1808C08F220/1806C08F220/14C10M169/041C10M2203/003
Inventor 张耀段庆华魏克成刘依农孙洪伟
Owner CHINA PETROLEUM & CHEM CORP
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