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A kind of olefin polymer and its preparation method and application

A technology of olefin polymers and polymerization reactions, applied in the field of olefin polymers, can solve problems such as not being able to meet the requirements of impact strength and glossiness at the same time

Active Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the fact that a single variety of modified rubber cannot simultaneously satisfy the impact strength of the resin when the existing modified rubber is used to modify polystyrene resin and / or acrylonitrile-butadiene-styrene resin. Requirements for the glossiness of the resin, and provide a new olefin polymer capable of imparting both high impact strength and high gloss to the resin, a preparation method for the olefin polymer, and an olefin polymer prepared by the method And the application of described olefin polymer as the modifier of polystyrene resin and / or acrylonitrile-butadiene-styrene resin

Method used

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  • A kind of olefin polymer and its preparation method and application
  • A kind of olefin polymer and its preparation method and application

Examples

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preparation example Construction

[0028] The preparation method of olefin polymer provided by the invention comprises the following steps:

[0029] (1) Under an inert gas environment, the monofunctional organolithium initiator and the conjugated diene monomer are carried out in an inert solvent for the first polymerization reaction;

[0030] (2) When the conversion rate of the conjugated diene monomer is more than or equal to 97%, the first polymerization product is subjected to a coupling reaction with a multifunctional coupling agent; the total coupling in the multifunctional coupling agent is The molar ratio of the linking group to the monofunctional organolithium initiator is 0.40-0.55:1;

[0031] (3) In the presence of a terminator, the product obtained in step (2) is subjected to a second polymerization reaction with the monovinylarene monomer, so that the conversion rate of the monovinylarene monomer is ≥ 97%; the termination The molar ratio of the catalyst to the monofunctional organolithium initiator...

Embodiment 1

[0071] This example is used to illustrate the olefin polymer provided by the present invention and its preparation method.

[0072] The reaction apparatus used in this example includes a polymerization reactor. Under the protective atmosphere of high-purity nitrogen, add 2730g of raffinate oil, 559g of 1,3-butadiene, 0.395g of 1,2-butadiene, and 0.329g of tetrahydrofuran to a 5-liter polymerization kettle in sequence, start stirring, and Add 0.716g of n-butyllithium initiator at low temperature to carry out the first polymerization reaction, the reaction pressure is 0.1-0.3MPa, the reaction material starts to heat up, and reaches the highest reaction temperature of 90°C in 8 minutes of reaction, and the conversion of butadiene monomer is measured Rate reaches 97%; Add silicon tetrachloride (the total coupling group of silicon tetrachloride and the mol ratio of n-butyllithium is 0.55:1) coupling agent 0.261g in polymerization reactor again, and temperature control At 70°C, the...

Embodiment 2

[0074] This example is used to illustrate the olefin polymer provided by the present invention and its preparation method.

[0075] The reaction apparatus used in this example includes a polymerization reactor. Under the protective atmosphere of high-purity nitrogen, add 2,730g of cyclohexane, 444g of 1,3-butadiene, 0.381g of 1,2-butadiene, and 0.317g of tetrahydrofuran to a 5-liter polymerization kettle in sequence, and add them at a temperature of 53°C. 0.517g of n-butyllithium initiator is used for the first polymerization reaction, the reaction pressure is 0.1-0.3MPa, the reaction material starts to heat up, and reaches the highest reaction temperature of 85°C in 10 minutes of reaction, and the conversion rate of butadiene monomer is measured to reach 97%. Add silicon tetrachloride (the total coupling group of silicon tetrachloride and the mol ratio of n-butyllithium is 0.45:1) coupling agent 0.154g in polymerization kettle again, and temperature is controlled at 80 ℃, pre...

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Abstract

The invention discloses an olefin polymer, a preparation method and application thereof. The olefin polymer contains a star-shaped conjugated diene homopolymer, a linear conjugated diene homopolymer and a linear conjugated diene-monovinylarene copolymer, and the molecular weight distribution of the olefin polymer is trimodal distribution, the Mooney viscosity ML1+4 of the olefin polymer at 100°C is 50-70, and the styrene solution of the olefin polymer at a concentration of 5% by weight has a viscosity of 0.02-0.04Pa at 25°C ·s. The olefin polymer obtained by the invention can simultaneously impart high impact strength and high gloss to the resin.

Description

technical field [0001] The present invention relates to an olefin polymer, a preparation method of an olefin polymer, an olefin polymer prepared by the method, and the olefin polymer as polystyrene resin and / or acrylonitrile-butadiene-styrene Application of resin modifiers. Background technique [0002] In order to improve the impact resistance of polystyrene (PS) resin and acrylonitrile-butadiene-styrene (ABS) resin, the prior art usually introduces rubber for modification therein. Generally speaking, a larger rubber particle size can make the resin have higher impact strength, but it will reduce the gloss of the resin. Although a smaller rubber particle size can ensure the high gloss of the resin, it is easy to be buried in stress cracks. Resulting in a decrease in the impact resistance of the resin. Therefore, it is necessary to control the rubber particle size within a certain size, so as to achieve the purpose of improving the glossiness of the resin and maintaining t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L47/00C08F136/06C08F4/48C08F8/42C08F236/10C08F236/06C08L25/06C08L55/02
Inventor 吕万树王雪李建成李传清毕海鹏刘天鹤鲁文平
Owner CHINA PETROLEUM & CHEM CORP
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