A kind of asymmetric star-shaped styrene-butadiene rubber and its preparation method and application as sole rubber material

A styrene-butadiene rubber and asymmetric technology, which is applied to asymmetric star-shaped styrene-butadiene rubber and its preparation and application as a sole rubber material, can solve problems such as difficulty in stable production at the current stage, and achieve mature equipment and process operation, high resistance to The effect of good abrasiveness, excellent wet skid resistance and elasticity

Active Publication Date: 2020-07-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stable control of the random gradient section is very difficult, and it is not easy to achieve stable production in the industry at this stage

Method used

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  • A kind of asymmetric star-shaped styrene-butadiene rubber and its preparation method and application as sole rubber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In a jacketed 5L stainless steel magnetically stirred reactor, the system was replaced 3 times with nitrogen gas. Add 2000g of cyclohexane and 0.1mL of tetrahydrofuran to the polymerization kettle, stir and raise the temperature to 55°C, add 110.25g of styrene (S 1 Accounting for 36.75% of the total amount of monomers), a small amount of n-butyllithium was added several times until the solution was pale yellow, and 4.3mmol of n-butyllithium was added again, polymerized for 25min, and then 174g (accounting for 58% of the total amount of monomers ) Butadiene is added to the polymerization kettle, the reaction temperature is controlled at 50-110°C, and the reaction is carried out for 35 minutes, and then 15.75g of styrene (S 2 Accounting for 5.25% of the total amount of monomers) into the polymerization kettle to continue the reaction for 30 minutes, after the monomers are completely converted, the temperature is raised to 70 ° C, and 1.1 mmol SnCl is added 4 The coupling...

Embodiment 2

[0054] Other processing conditions and raw material addition are identical with embodiment 1, and difference is: the ratio of styrene twice addition is different, i.e. S 1 :S 2 The difference is 1.2:1, S1=68.73g, S2=57.27g, and the styrene rubber with the same structure as in Example 1 is obtained.

Embodiment 3

[0056] Other processing conditions are identical with embodiment 1, and difference is: styrene accounts for the different ratio of monomer total amount, is 20%, S 1 =52.5g, S 2 =7.5g, butadiene B=240g, the styrene rubber of the same structure as Example 1 was obtained.

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Abstract

The invention provides an asymmetric star type styrene-butadiene rubber, and a preparation method thereof and applications of the asymmetric star type styrene-butadiene rubber as a sole rubber material, wherein the asymmetric star type styrene-butadiene rubber has a polystyrene-polybutadiene-polystyrene triblock asymmetric polymer arm. The preparation method comprises: in a system containing an organic single lithium initiator, sequentially adding most of styrene, polymerizing, adding butadiene, polymerizing, adding a small part of styrene, polymerizing, adding a coupling agent after completing the polymerizing, and carrying out a coupling reaction to obtain the asymmetric star type styrene-butadiene rubber. The prepared asymmetric star type styrene-butadiene rubber of the present invention has characteristics of high tear strength, high wear resistance and good processing property, and can be used for preparing the sole with characteristics of wear resistance, excellent wet-skid resistance, excellent elasticity, and wearing comfort.

Description

Background technique [0001] Styrene-conjugated diene copolymers are mainly used in adhesives, asphalt and other polymer modifications, coating materials, sealing materials, toys, shoemaking, etc., and shoemaking is one of the most used areas. Styrene-conjugated diene copolymer-based soles have good oil resistance and chemical corrosion resistance, good air permeability, impact resistance, good elasticity, and are comfortable to wear, especially styrene-conjugated diene copolymer soles have excellent The anti-wet skid property is not available in the soles of other materials. Because of the above-mentioned characteristics, the large soles of general shoes are made of rubber, so the amount of styrene-conjugated diene copolymer in shoemaking is quite large. However, ordinary styrene-conjugated diene copolymer materials have some disadvantages, such as poor wear resistance and low tear strength. Although the addition of carbon black and other fillers can enhance its wear resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/04C08L53/02A43B13/04
CPCA43B13/04C08F297/044C08L53/02
Inventor 袁煜艳彭小寒梁红文
Owner CHINA PETROLEUM & CHEM CORP
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