Functional SSBR (solution polymerized styrene-butadiene rubber) in silane coupling agent modification chain and synthesis method of functional SSBR

A technology of solution-polymerized styrene-butadiene rubber and silane coupling agent, applied in the field of solution-polymerized styrene-butadiene rubber synthesis, can solve the problems of affecting the reinforcement effect, high production cost, limited functional group content, etc., and achieves improved functionalization efficiency and improved processing. Performance, improve the effect of blindness

Active Publication Date: 2018-05-11
GANSU AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its functional group content is very limited, so it cannot solve the problem of dispersion of active fillers in rubber well, thus affecting its reinforcing effect
[0007] CN104017133A (publication date: 2014.04.18) discloses a synthesis of multifunctional solution-polymerized styrene-butadiene rubber in nitrogen-containing chain end chains and a preparation method thereof. In the process of copolymerization of styrene-butadiene, a nitrogen-containing third monomer is introduced to synthesize Multifunctional solution polymerization of styrene-butadiene rubber in the nitrogen-containing chain end chain, this method overcomes the disadvantage of only chain end modification in the traditional solution polymerization of styrene-butadiene rubber, but needs to add a third monomer during the polymerization process, and the functional group restricted to nitrogen-containing groups
However, in the synthesis of this method, 1,1-diphenylethylene derivatives containing siloxane group monomers need to be introduced, and the production cost is relatively high

Method used

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  • Functional SSBR (solution polymerized styrene-butadiene rubber) in silane coupling agent modification chain and synthesis method of functional SSBR
  • Functional SSBR (solution polymerized styrene-butadiene rubber) in silane coupling agent modification chain and synthesis method of functional SSBR
  • Functional SSBR (solution polymerized styrene-butadiene rubber) in silane coupling agent modification chain and synthesis method of functional SSBR

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Experimental program
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Effect test

Embodiment 1

[0027] In a jacketed 15L polymerization kettle, the system was replaced with argon for 3 times. Add 10.8 L of cyclopentane, 315 g of styrene, 945 g of butadiene, and 3.1 g of ethyl tetrahydrofurfuryl ether into the polymerization kettle. After removing impurities, raise the temperature to 40°C, add 4.2 mmol of n-butyllithium, and polymerize at natural temperature. After 1 hour, add 3mmol of n-butyllithium, keep at 40°C, stir for 10 minutes, then add 3.6mmol of 3-chloropropyltrimethoxysilane, react for 2 hours, terminate the reaction, add 1010 6.3g of antioxidant, and discharge , the glue is coagulated by wet method and dried.

Embodiment 2

[0029] In a jacketed 15L polymerization kettle, the system was replaced with argon for 3 times. Add 10.8 L of cyclopentane, 315 g of styrene, 945 g of butadiene, and 3.1 g of ethyl tetrahydrofurfuryl ether into the polymerization kettle. After removing impurities, raise the temperature to 40°C, add 4.2 mmol of n-butyllithium, and polymerize at natural temperature. After 1 hour, add 150mmol n-butyllithium, keep at 40°C, stir for 10 minutes, add 180mmol 3-chloropropyltrimethoxysilane, react for 1.5 hours, stop the reaction, add 1010 63g of antioxidant, discharge, glue The liquid is condensed by wet method and dried.

Embodiment 3

[0031] In a jacketed 15L polymerization kettle, the system was replaced with argon for 3 times. Add 10.8 L of cyclopentane, 315 g of styrene, 945 g of butadiene, and 3.1 g of ethyl tetrahydrofurfuryl ether into the polymerization kettle. After removing impurities, raise the temperature to 40°C, add 4.2 mmol of n-butyllithium, and polymerize at natural temperature. After 1 hour, add 30mmol n-butyllithium, keep at 40°C, stir for 10 minutes, add 36mmol 3-chloropropyltrimethoxysilane, react for 1.5 hours, stop the reaction, add antioxidant 1010 63g, discharge, glue The liquid is condensed by wet method and dried.

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Abstract

The invention discloses functional SSBR (solution polymerized styrene-butadiene rubber) in a silane coupling agent modification chain and a synthesis method of the functional SSBR. The method comprises steps as follows: under argon protection, butadiene and styrene are added to a hydrocarbon solvent, and organolithium is added to remove impurities and taken as an initiator; a structure modifier isadded for random copolymerization of butadiene and styrene; when conversion rate of a copolymerization is close to 100%, organolithium is added to a hydrocarbon solution of unterminated activated SSBR for a reaction, and a rubber solution is obtained; a silane coupling agent is added to the rubber solution for a reaction, an antioxidant is added through termination, discharging is performed, therubber solution is subjected to wet agglomeration and dried, and the functional SSBR in the branched chain is obtained. The functional SSBR and the synthesis method have beneficial effects as follows:processability of the SSBR can be improved greatly, compatibility of the SSBR and white carbon black is improved, and functional groups are distributed in the polymer chain more uniformly.

Description

technical field [0001] The invention belongs to the technical field of synthesis of solution-polymerized styrene-butadiene rubber, and relates to functionalized solution-polymerized styrene-butadiene rubber in a chain modified by a silane coupling agent and a synthesis method thereof. Background technique [0002] As a tire tread rubber, solution polystyrene butadiene rubber has good wet skid resistance, excellent wear resistance and low rolling resistance. Branched functionalized solution polystyrene butadiene rubber (SSBR) is a synthetic part with It is a mixed rubber with large molecular weight styrene-butadiene rubber linear main chain structure and small molecular linear branch structure. Because of its unique branched structure, and the functional groups contained in the branched structure can improve its affinity with carbon black or silica, thereby improving the processing performance of solution-polymerized styrene-butadiene rubber. [0003] At present, the solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F236/06C08C19/25
CPCC08C19/25C08F236/10C08F212/08
Inventor 崔彦君向永生张华强李福崇董静宋同江崔英
Owner GANSU AGRI UNIV
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