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Synthesizing method of solution polymerized styrene butadiene rubber

A technology of solution-polymerized styrene-butadiene rubber and polymerization method is applied in the synthesis field of star-shaped solution-polymerized styrene-butadiene rubber, which can solve the problems of narrow temperature range in high damping area, influence on use, influence on the use of products in the field of damping and shock absorption, etc.

Active Publication Date: 2012-07-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature range in the high damping area is narrow, and the temperature range of the loss factor Tanδ≥0.3 is about -25~-4°C, which affects the use of the product in the field of damping and shock absorption.
[0004] Document 2 (Materials Engineering 2009; S1: 192~195) used ethoxyethyl morpholine (EOEM) to prepare SSBR with high vinyl content, and the product loss factor Tanδ can reach 0.9, but the temperature range of the high damping region is the same Narrow, the temperature range of loss factor Tanδ≥0.3 is about -1~+23℃, which affects the use of the product in the field of damping and shock absorption

Method used

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  • Synthesizing method of solution polymerized styrene butadiene rubber
  • Synthesizing method of solution polymerized styrene butadiene rubber
  • Synthesizing method of solution polymerized styrene butadiene rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1 Use THF, cyclohexane / n-hexane mixed solvent (=82 / 18, weight ratio) system to add monomer step by step to synthesize star-shaped solution-polymerized styrene-butadiene rubber (BD / ST=75 / 25, weight ratio)

[0033]The polymerization is carried out in a 5-liter stainless steel reactor. After the reactor is soaked with cyclohexane / n-hexane, it is evacuated and filled with nitrogen (high-purity nitrogen) for three times. The reactor is heated by hot oil and cooled by cold oil. The temperature of the hot oil is set to Set at 50°C, and the cold oil temperature at 30°C. First add refined cyclohexane / n-hexane 2300g, butadiene 103.10g, heat the reaction material with hot oil, when the temperature in the reactor rises to 50°C, control the ratio of hot oil and cold oil to keep the temperature of the material stable, and then Add 9ml of n-butyllithium (diluted with polymerization solvent, concentration: 0.46M) for miscellaneous killing and initiation at one time to initiat...

Embodiment 2

[0039] Example 2 Using ETE, the cyclohexane system is added step by step to synthesize star-shaped solution polystyrene-butadiene rubber (BD / ST=75 / 25, weight ratio)

[0040] Copolymer polymerization method, monomer addition method and product testing conditions are the same as in Example 1, the difference is that the polymerization solvent is changed to cyclohexane, THF is changed to ETE during the B stage reaction, and the addition is 0.4g. Properties and damping properties are shown in Table 2.

Embodiment 3

[0045] Example 3 Using BEE, the raffinate oil system is added step by step to synthesize star-shaped solution-polymerized styrene-butadiene rubber (BD / ST=65 / 35, weight ratio)

[0046] Polymerization is carried out in a 5-liter stainless steel reactor. After the reactor is soaked with residual oil, it is evacuated and filled with nitrogen (high-purity nitrogen) for three times. The reactor is heated by hot oil and cooled by cold oil. The temperature of the hot oil is set at 70 °C, the cold oil temperature is set to 30 °C. First add 2300g of refined raffinate and 103.10g of butadiene, heat the reaction material with hot oil, and when the temperature in the reactor rises to 70°C, control the ratio of hot oil and cold oil to keep the temperature of the material stable, and then add it all at once Use 8.5ml of n-butyllithium (diluted with a polymerization solvent, the concentration is 0.46M) for miscellaneous killing and initiation to initiate the polymerization reaction. After 2...

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Abstract

The invention relates to a synthesizing method for producing solution polymerized styrene butadiene rubber. The synthesizing method comprises the following steps that: in the presence of organic lithium as initiator, copolymerizing butadiene and isoprene in a hydrocarbon solvent at 0-130 DEG C by adding a monomer and a structure regulator step by step, and adding a coupling agent with functionality of 2-4 into the copolymer to perform the coupling reaction after polymerization reaction basically completes. The synthesized solution polymerized styrene butadiene rubber has relatively high damping performance in wide temperature range, and can be widely used in damping materials and stealth materials.

Description

technical field [0001] The invention relates to a synthesis method of solution-polymerized styrene-butadiene rubber (SSBR), in particular to a synthesis method of star-shaped solution-polymerized styrene-butadiene rubber with wide temperature range and high damping. Background technique [0002] It is reported in the literature that SSBR is a copolymer of butadiene and styrene, and its preparation process belongs to anionic living polymerization. It can not only adjust the microstructure within a certain range by means of molecular structure design, but also adjust the monomer ratio to prepare Varieties with different performance characteristics, so as to meet the special requirements of the prepared products in terms of strength modulus, density, temperature adaptability, pressure adaptability, and damping performance in a wide frequency range. [0003] Document 1 (Elastomer 2009; 6:35~37) prepared SSBR / butyl rubber material by solution co-precipitation method, which improv...

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F2/38
Inventor 王雪李传清刘慧玲徐林李建成刘天鹤刘凤香吕万树王世朝赵青松关逸英
Owner CHINA PETROLEUM & CHEM CORP