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Dendrimer polydiolefin branching regulator and preparation method thereof

A technology of diolefin and regulator, which is applied in the field of branched polydiolefin branch regulator and preparation thereof, and achieves the effects of simple method, improved processability and increased branching degree

Active Publication Date: 2017-07-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of how to obtain branched polydiene branching regulator to obtain polydiene rubber with increased degree of branching, thereby improving the processability and mechanical properties of polydiene rubber. Shaped polydiene branching regulator and preparation method thereof

Method used

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  • Dendrimer polydiolefin branching regulator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This example illustrates the preparation of dendritic polydiene branching modifiers and dendritic polydiene rubbers of the present invention.

[0069] (1) Preparation of dendritic polydiene branching regulator: add butadiene 3g, solvent 25ml (which contains 22ml tetrahydrofuran and 3ml hexane fraction) in the polymerization bottle; after the polymerization bottle is treated at 50°C in a constant temperature water bath, Add 0.4ml of the initiator required for miscellaneous killing and the n-butyllithium required for the first solution polymerization into the polymerization bottle and carry out the first solution polymerization at 50°C. After 1 hour, the polymerization liquid is obtained. The polymerization Liquid sampling analysis, determine wherein to contain linear polybutadiene, the number average molecular weight is 600, the 1,4 structure content in the structure of linear polybutadiene is 16.2% by weight, the main chain of linear polybutadiene is averagely branched ...

Embodiment 2

[0074] This example illustrates the preparation of dendritic polydiene branching modifiers and dendritic polydiene rubbers of the present invention.

[0075] (1) Preparation of dendritic polydiene branching regulator: add 6g of isopentene to the polymerization bottle, 25ml of solvent (which contains 20ml of tetrahydrofuran and 5ml of hexane fraction); after the polymerization bottle is treated at 55°C in a constant temperature water bath, Add 0.6ml of the initiator required for miscellaneous killing and the n-butyllithium required for the first solution polymerization into the polymerization bottle and carry out the first solution polymerization at 55°C. After 1 hour, the polymerization liquid is obtained. The polymerization Liquid sampling analysis, determine wherein to contain linear polybutadiene, the number average molecular weight is 1500, and the cis structure content is 10.3% by weight in the structure of linear polybutadiene, and the main chain of linear polybutadiene a...

Embodiment 3

[0080] This example illustrates the preparation of dendritic polydiene branching modifiers and dendritic polydiene rubbers of the present invention.

[0081] (1) Preparation of dendritic polydiene branching regulator: add butadiene 4.2g, solvent 25ml (which contains 13ml tetrahydrofuran and 12ml hexane fraction) in the polymerization bottle; after the polymerization bottle is treated at 50°C in a constant temperature water bath Add 0.6ml of the initiator required for miscellaneous killing and the n-butyllithium required for the first solution polymerization into the polymerization bottle to carry out the first solution polymerization at 50°C, and obtain the polymerization solution after 1 hour. Polymerization liquid sampling analysis, determine wherein to contain straight-chain polybutadiene, number average molecular weight is 2000, and in the structure of straight-chain polybutadiene, 1,4 structure content is 12.4% by weight, and the main chain of straight-chain polybutadiene ...

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Abstract

The present invention relates to the field of branching regulators for branching a polydiolefin rubber, and discloses a dendrimer polydiolefin branching regulator and a preparation method thereof, wherein the number average molecular weight of the dendrimer polydiolefin branching regulator is 5000-50000, the molecular weight distribution of the dendrimer polydiolefin branching regulator is 1-2, the 1,4 structural unit content in the structure of the dendrimer polydiolefin is not more than 50 wt%, and the average branch chain number of the main chain of the dendrimer polydiolefin is not less than 1. According to the present invention, the obtained dendrimer polydiolefin branching regulator can be further used for the polymerization of the dendrimer polydiolefin rubber, can regulate the molecular structure of the polydiolefin rubber, and can improve the processability of the polydiolefin rubber; the preparation method is simple; and the dendrimer polydiolefin rubber obtained from the dendrimer polydiolefin branching regulator has the high branching degree and the improved mechanical property.

Description

technical field [0001] The invention relates to the field of a branching regulator for branched polydiene rubber, in particular to a dendritic polydiene branching regulator and a preparation method thereof. Background technique [0002] Synthetic rubber is an important elastomer material, which is widely used in various fields of people's production and life. However, the synthetic rubber prepared by some catalysts has the defects of high molecular weight, narrow molecular weight distribution, high solution viscosity during polymerization, and poor processability of the obtained product, which brings great difficulties to the processing and application of synthetic rubber. [0003] CN101068839A discloses a copolymer comprising the reaction product of: (a) at least one ethylenically unsaturated monomer; (b) at least one N-substituted maleimide monomer; (c) at least one crosslinking agent comprising at least two ethylenically unsaturated functional groups; (d) at least one fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F236/08C08F4/52
CPCC08F4/52C08F285/00C08F236/08
Inventor 辛益双孙伟程实谭金枚
Owner CHINA PETROLEUM & CHEM CORP