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Process for preparing random copolymers

A technology of random copolymers and mixtures, which can be used in lubricating compositions, additives, petroleum industry, etc., and can solve problems such as difficult realization of industrial scale

Active Publication Date: 2021-06-22
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Workup with large volumes of solvent relative to starting material, which is difficult to achieve on an industrial scale

Method used

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  • Process for preparing random copolymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0173] The invention is illustrated by the following examples.

[0174] experiment method

[0175] Use the Tosoh EcoSEC GPC system "HLC-8320" equipped with a PSS SDV 5μm pre-column and a 30cm PSS SDV 5μm linear S separation column and an RI detector, at a flow rate of 0.3mL / min, at T=40°C, with Tetrahydrofuran (THF) is as eluent, and the weight-average molecular weight M of random copolymer of the present invention is measured with reference to polybutadiene calibration standard sample w and polydispersity index PDI.

[0176] The conversion corresponds to the weight of monomer incorporated into the copolymer:total weight of the initial monomer mixture. Conversion was determined gravimetrically, where the total weight of dry polymer was calculated relative to the total monomer feed.

[0177] Preparation of non-hydrogenated copolymers

[0178] The monomers indicated in Table 1 were mixed with toluene in a 5-liter autoclave at a temperature of 20° C. and a pressure of 10 bar ...

Embodiment 1

[0180] Example 1 was prepared according to the general procedure except that the initiator was added in two steps. First, 80% of the initiator was added, followed by a second addition of 20% of the initiator after a reaction time of 2 hours. Workup was also carried out in the presence of BHT (2,6-di-tert-butyl-4-methylphenol).

[0181] Examples 2 and 6 were prepared according to the general procedure except that the initiator was added in two steps. First, 80% of the initiator was added, followed by a second addition of 20% of the initiator after a reaction time of 2 hours. Furthermore, after 4 hours, the reaction temperature was increased to 130° C. for 30 minutes.

Embodiment 3

[0182] Example 3 was prepared according to the general procedure, except that the initiator was added in two steps and the monomer composition additionally comprised macromers d). First, 80% of the initiator was added, followed by a second addition of 20% of the initiator after a reaction time of 2 hours. Furthermore, after 4 hours, the reaction temperature was increased to 130° C. for 30 minutes.

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PUM

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Abstract

The invention relates to a process for preparing random copolymers comprising monomers derived from conjugated dienes and C7-C24 alkyl(meth)acrylates by free radical solution polymerization.

Description

technical field [0001] The present invention relates to a process for the preparation of random copolymers comprising monomers derived from conjugated dienes and alkyl (meth)acrylates. Background technique [0002] The invention relates to the field of lubrication. Lubricants are compositions that reduce friction between surfaces. In addition to allowing freedom of movement between two surfaces and reducing mechanical wear of the surfaces, lubricants can also inhibit corrosion of the surfaces and / or can inhibit damage to the surfaces due to heat or oxidation. Examples of lubricant compositions include, but are not limited to, engine oils, transmission fluids, gear oils, industrial lubricants, greases, and metalworking oils. [0003] A typical lubricant composition includes a base fluid (also called a base oil) and optionally one or more additives. Conventional base fluids are naturally occurring hydrocarbons such as mineral oils or synthetic compositions such as poly-alph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M145/14C08F136/06
CPCC08F136/06C10M145/14C10M2205/06C10M2209/084C10N2020/04C10N2020/019C10N2030/02C10N2060/02C08F236/04C08F220/18C08F4/70C08F220/1804C08F220/1812C08F2/06C08F8/04C08F220/14C08F236/06C08F236/08C08K5/14C08K5/23C10M143/12
Inventor H·普莱奇M·魏兰E·C·施魏辛格B·艾森伯格
Owner EVONIK OPERATIONS GMBH