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Copolymer for diesel low temperature flow promoter and its preparing method

A technology of low-temperature fluidity and copolymers, applied in the direction of lubricating compositions, etc., can solve the problems of complex preparation methods of copolymers, pollute the environment, etc., and achieve the effect of reducing cold filtration point and freezing point

Inactive Publication Date: 2005-08-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the results of application, these copolymers exist not only to focus on reducing the freezing point (SP) but ignoring the reduction of the cold filter point (CFPP) (reducing CFPP has more practical value than reducing SP), or the preparation method of the copolymer is complicated. And pollute the environment and other defects

Method used

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  • Copolymer for diesel low temperature flow promoter and its preparing method
  • Copolymer for diesel low temperature flow promoter and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 3 mol of butyl acrylate, 1 mol of acrylic acid, 1 mol of styrene, toluene or ethanol as solvent, in Co 60 Under radiation source irradiation, polymerize at 50-80°C for 4 hours, lauryl alcohol, 16 amine, 1% by weight (relative to the total mass of reactants) of p-toluenesulfonic acid or strongly acidic ion exchange resin at 120-140°C After esterification and amidation for 8 hours, the water generated by the amine salification reaction is azeotropically distilled off with the solvent. The number average molecular weight is several hundred to 15,000, and the molecular weight distribution is 2.10 to 2.30. Acrylate copolymer infrared spectrum (coating method) data are as follows: main absorption peaks: 2956.5, 2918.6, 2849.3cm -1 , ν C-H (CH 3 , CH 2 ); 1739.5cm -1 , ν C＝O (ester); 1656.6, v C＝O (amide); 1617.0, v C＝O (Amine salt part); 1471.9, 1462.6, ν of benzene ring C＝C ;720cm -1 , δ of C-C .

[0023] To obtain 5 parts of acrylate copolymer, add 5 parts of E...

Embodiment 2

[0026] 2 mol of styrene, 7 mol of butyl acrylate, 6 mol of methyl methacrylate, 3 mol of acrylic acid, toluene, benzene or n-hexane, Co 60 , 50 ~ 80 ℃ polymerization reaction 5 ~ 6hr. Lauryl alcohol, 16-18 alcohol, 16 amine, 1% p-toluenesulfonic acid or strong acid ion exchange resin, 120°C-140°C, esterification, amidation, amine salification to remove the corresponding moisture. The number-average molecular weight of the obtained copolymer is 10000-30000, and the molecular weight distribution is 2.0-3.0.

[0027] C 16 ~C 18 Alcohol carbon number distribution: C 14 5%, C 16 20%, C 18 75%.

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Abstract

The polymer has structural expression as shown in (I). Acrylic acid, methacrylic acid, butyl acrylate and styrene are made to react at 50-100 deg.c under irradiation of irradiation source for 1-5 hr to obtain copolymer. The copolymer is then reflux esterified, amidized and aminated with C12-C24 fatty alcohol, C10-C22 fatty amine and C16-C18 fatty secondary amine in the presence of toluene sulfonic acid or sulfonic acid type strong acid ion exchange resin as catalyst to obtain the destination product. The copolymer of the present invention as the diesel oil low temperature flowability improver can lower both the solidification point and the cold filter plugging point of diesel oil. In addition, the irradiation polymerization process of the present invention is superior to available polymerization process, which needs water washing resulting in emulsification, lowered yield, environmental pollution and other demerits.

Description

technical field [0001] The present invention relates to a kind of copolymer and preparation method thereof for diesel oil low-temperature fluidity improver, specifically, relate to a kind of acrylate and / or methacrylate and styrene for diesel oil low-temperature fluidity improver Copolymers and methods for their preparation. Background technique [0002] The low-temperature fluidity improvement technology of oil products (commonly known as pour point depressing technology) first began in the early 1930s. In the 1960s, with the increasing production of waxy crude oil in the world, in order to solve the problems in production, a variety of low-temperature fluidity improvers (or called pour point depressants) adapted to the properties of crude oil from different origins were successively researched. [0003] Polymer copolymers are the key components in diesel pour point depressants. Currently, the copolymers that can be used in diesel pour point depressants mainly include: eth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C10M145/14
Inventor 赵敏金霞朝章卫民李治章卫东
Owner EAST CHINA UNIV OF SCI & TECH
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