Monovinylarene-conjugated diene copolymer, preparation method thereof, random linear copolymer, vulcanized rubber and application

A technology of monovinylarene and conjugated diene, which is applied in the field of monovinylarene-conjugated diene copolymer and its preparation and random linear copolymer and composition and vulcanized rubber, which can solve the problems affecting the damping reduction of products. The application of seismic materials, low damping value, etc., to achieve good damping performance and wide damping temperature range

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

AI Technical Summary

Problems solved by technology

The temperature range of the loss factor tanδ ≥ 0.3 of the rubber material synthesized by this method is about -25°C to -4°C, and the damping value above room temperature is low, which affects the application of the product as a damping and shock absorbing material at room temperature

Method used

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  • Monovinylarene-conjugated diene copolymer, preparation method thereof, random linear copolymer, vulcanized rubber and application
  • Monovinylarene-conjugated diene copolymer, preparation method thereof, random linear copolymer, vulcanized rubber and application
  • Monovinylarene-conjugated diene copolymer, preparation method thereof, random linear copolymer, vulcanized rubber and application

Examples

Experimental program
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Effect test

Embodiment 1

[0126] The polymerization reaction was carried out in a 5-liter stainless steel stirred reactor, and the specific operations were as follows.

[0127](1) Under the protection of high-purity nitrogen, add 2288g of mixed solvent (the mixed solution of cyclohexane and normal hexane, the mass ratio of cyclohexane / normal hexane is 82 / 18), 64g of styrene (denoted as St, below same) and 190g butadiene (referred to as Bd, the same below), then add 3.66mmol of 1,2-di-tert-butoxyethane (represented as A, A / Li=1, molar ratio), open the reactor Stir (rotating speed is set at 200rpm) to mix the materials evenly. Afterwards, the reaction material was heated with a circulating water bath. When the temperature in the reactor rose to 25°C, the n-butyllithium initiator was used to kill impurities, and then 3.66mmol of n-butyllithium was added to initiate polymerization. During the polymerization reaction, The reaction heat was not removed and the pressure was controlled at 0.2 MPa, and the rea...

Embodiment 2

[0140] The polymerization reaction was carried out in a 5-liter stainless steel stirred reactor, and the specific operations were as follows.

[0141] (1) under the protection of high-purity nitrogen, add 2288g mixed solvent (being the mixed solution of hexanaphthene and n-hexane, the mass ratio of hexanaphthene / n-hexane is 90 / 10), 64g styrene (that is, St) and 190g of butadiene (i.e., Bd), then add 5.78mmol of 1,2-di-tert-butoxyethane (referred to as A, A / Li=1.5, molar ratio), open the reactor and stir (rotating speed is set at 200rpm) to mix the material evenly. Afterwards, the reaction material was heated with a circulating water bath. When the temperature in the reactor rose to 35°C, the n-butyllithium initiator was used to kill impurities, and then 3.97 mmol of n-butyllithium was added to initiate polymerization. During the polymerization reaction, The reaction heat was not removed and the pressure was controlled at 0.2 MPa, and the reaction was carried out for 60 minute...

Embodiment 3

[0144] The polymerization reaction was carried out in a 5-liter stainless steel stirred reactor, and the specific operations were as follows.

[0145] (1) under the protection of high-purity nitrogen, add 2288g mixed solvent (being the mixed solution of hexanaphthene and n-hexane, the mass ratio of hexanaphthene / n-hexane is 82 / 18), 51g styrene (that is, St) and 203g of butadiene (i.e., Bd), then add 4.81mmol of 1,2-di-tert-butoxyethane (referred to as A, A / Li=1.2, molar ratio), open the reactor and stir (rotating speed is set at 200rpm) to mix the material evenly. Afterwards, the reaction material was heated with a circulating water bath. When the temperature in the reactor rose to 50°C, the n-butyllithium initiator was used to kill impurities, and then 3.87mmol of n-butyllithium was added to initiate polymerization. During the polymerization reaction, The temperature in the reactor was controlled to be 50° C. and the pressure was controlled to be 0.2 MPa, and the reaction wa...

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Abstract

The invention discloses a monovinylarene-conjugated diene copolymer, and a preparation method and application thereof. The method includes contacting monovinylarene and conjugated diene with an anionic polymerization initiator and a structure regulator under the anionic polymerization condition. The structure regulator is selected from a tert-butoxy compound shown as the formula I. The invention further discloses a monovinylarene-conjugated diene random linear copolymer, a copolymer composition formed by coupling of the random linear copolymer, vulcanized rubber and application. The tert-butoxy compound with a specific structure is taken as the structure regulator for anionic polymerization of the monovinylarene and the conjugated diene, so that the contents of styrene micro blocks and lateral groups in the copolymer can be regulated effectively, and the prepared monovinylarene-conjugated diene copolymer has a wide damping temperature range and has good damping performance at a low temperature and the room temperature (or near room temperature).

Description

technical field [0001] The present invention relates to a preparation method of a monovinylarene-conjugated diene copolymer and the copolymer prepared by the method. The present invention also relates to a monovinylarene-conjugated diene random linear copolymer and its combination and vulcanized rubber, the present invention further relates to the above-mentioned monovinylarene-conjugated diene copolymer, monovinylarene-conjugated diene random linear copolymer, composition and application of vulcanized rubber as a damping material. Background technique [0002] With the development of social economy and technology, mechanical equipment tends to develop in the direction of high speed and high load, and the problems of vibration and noise caused by this are becoming more and more prominent. Vibration and noise limit the improvement of mechanical equipment performance, seriously affect the stability and reliability of mechanical equipment operation, and vibration and noise will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F297/04C08F2/38C08L53/02
CPCC08F2/38C08F297/044C08L53/025C08L2205/025
Inventor 康新贺刘辉王妮妮孙文娟王雪徐林
Owner CHINA PETROLEUM & CHEM CORP
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