A kind of bifunctionalized styrene-butadiene polymer and its preparation method, rubber composition and vulcanized rubber

A rubber composition, bifunctionalization technology, applied in the fields of vulcanized rubber, bifunctionalized styrene-butadiene polymer and its preparation, and rubber composition, can solve problems such as high rolling resistance of vulcanized rubber, poor wet skid resistance, and reduced rolling resistance , to achieve the effect of promoting dispersion, performance improvement and obvious performance

Active Publication Date: 2019-03-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the objects of the present invention is to provide a rubber composition and vulcanized rubber, which overcomes the high rolling resistance and poor wet skid resistance of the vulcanized rubber obtained by solution-polymerized styrene-butadiene rubber. Ratio, enhanced mechanical properties, reduced rolling resistance, enhanced wet skid resistance, is a high-performance energy-saving rubber with excellent comprehensive properties

Method used

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  • A kind of bifunctionalized styrene-butadiene polymer and its preparation method, rubber composition and vulcanized rubber
  • A kind of bifunctionalized styrene-butadiene polymer and its preparation method, rubber composition and vulcanized rubber
  • A kind of bifunctionalized styrene-butadiene polymer and its preparation method, rubber composition and vulcanized rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Add 95ml of cyclohexane and 700mg of lithium metal to a 250ml three-necked flask, stir in a water bath, add 9.5ml of 2-chloroethylbenzyl sulfide dropwise to the three-necked flask within 20min, and the reaction temperature is 20 ℃, prepare (2-(benzylthio)ethyl)lithium initiator with a concentration of 0.5mol / L. Add 7.8g of butadiene, 2.2g of styrene, and 110ml of cyclohexane into a 250ml three-necked flask. Then add 5.6ml of (2-(benzylthio)ethyl)lithium initiator, regulator N,N-dimethyltetrahydrofurfurylamine (concentration 0.2mol / L) 6.5ml, react 2 at 50°C Hour. Continue to add 0.71ml of chloropropyltrimethoxysilane, react at 55°C for 45min, and finally flocculate with ethanol, put the product into a vacuum oven for extraction and drying, and obtain double-end functionalized solution polystyrene-butadiene rubber J1. The number average molecular weight measured by GPC was 4000, and the molecular weight distribution was 1.03. 1 H-NMR spectrum records styrene mass perce...

Embodiment 2

[0031]Add 100ml of tetrahydrofuran and 500mg of lithium metal to a 250ml three-necked flask, stir in a water bath, add 8.7ml of 3-bromopropylbenzyl sulfide dropwise into the reaction flask, the reaction temperature is 25°C, and the prepared concentration is 0.5mol / L (3-(benzylthio)propyl)lithium initiator. Add 18g of butadiene, 6g of styrene, and 250ml of cyclohexane into a 250ml three-necked flask. Then add 9.8ml of (3-(benzylthio)propyl)lithium initiator, regulator N,N-dimethyltetrahydrofurfurylamine (concentration 0.2mol / L) 6.2ml, and react 2 at 50°C Hour. Continue to add 1.50ml of chloropropyltriethoxysilane, react at 55°C for 45min, and finally flocculate with ethanol, put the product into a vacuum oven for extraction and drying, and obtain double-end functionalized solution polystyrene butadiene rubber J2. The number average molecular weight measured by GPC was 5000, and the molecular weight distribution was 1.17. 1 The mass percent content of styrene as measured by H...

Embodiment 3

[0033] Add 100ml of cyclohexane and 670mg of lithium metal to a 250ml three-necked flask, stir in a water bath, and add 8.9ml of 2-chloroethylbenzyl sulfide dropwise into the reaction flask at a reaction temperature of 50°C. React for 1 hour under magnetic stirring to prepare a (2-(benzylthio)ethyl)lithium initiator with a concentration of 0.52 mol / L. Add 12.6g of butadiene, 3.8g of styrene, and 250ml of cyclohexane into a 250ml three-necked flask. Then add 6.96ml of (2-(benzylthio)ethyl)lithium initiator, regulator N,N-dimethyltetrahydrofurfurylamine (concentration 0.2mol / L) 5.6ml, react 2 at 55°C Hour. Continue to add 1.10ml of chloropropyltriethoxysilane, react at 60°C for 45min, and finally flocculate with ethanol, put the product into a vacuum oven for extraction and drying, and obtain double-end functionalized solution polystyrene butadiene rubber J3. The number average molecular weight measured by GPC was 4500, and the molecular weight distribution was 1.08. 1 The ma...

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Abstract

The present invention relates to a bifunctionalized butadiene-styrene polymer, which has a general formula of (ArCH2SR1PR2)mSi(OR3)n, wherein Ar is C6-C20 aryl or aralkyl, R1 is C1-C10 aryl or aralkyl, R2 is C1-C10 alkyl, R3 is C1-C5 alkyl, m is 1-3, n is 4-m, and P is the copolymer of butadiene and styrene. Compared to the solution polymerized styrene butadiene rubber with no functionalization on both terminals, the sulfur-containing siloxane-terminated butadiene-styrene polymer has advantages of enhanced mechanical property, reduced rolling resistance and enhanced wet-slip resistance, and is the high-performance energy saving rubber having the excellent comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of synthetic rubber, in particular to a bifunctionalized styrene-butadiene polymer, a preparation method thereof, a rubber composition and vulcanized rubber prepared from the bifunctionalized styrene-butadiene polymer. Background technique [0002] In recent years, environmental protection, energy saving, high performance, and low cost have become the development direction of rubber in the future. Solution-polymerized styrene-butadiene rubber with excellent comprehensive properties such as high wet skid resistance, low rolling resistance, low heat generation, and high wear resistance can be passed through extreme The functionalized initiators containing O, S, N, Si, Sn and other heteroatoms show a good prospect for terminal modification of solution-polymerized styrene-butadiene rubber. Functional modification of the chain ends of solution-polymerized styrene-butadiene rubber can enhance the affinity between ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C08F236/10C08F236/06C08F8/42C08F4/48C08L15/00C08K13/02C08K3/04C08K3/36C08K3/06C08K3/22C08K5/09B29C35/02
Inventor鲁建民修志龙周豪仝璐韩明哲华伦松韩丙勇杨广明
OwnerPETROCHINA CO LTD