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A kind of olefin polymer and its preparation method and application

An olefin polymer and polymerization reaction technology, applied in the field of olefin polymers, can solve the problem that modified rubber cannot meet the requirements of resin impact strength and resin gloss 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 defect that a single type of modified rubber in the prior art cannot meet the requirements of resin impact strength and resin gloss at the same time, and to provide a new olefin that can simultaneously impart high impact strength and high gloss to the resin. Polymer, preparation method of said olefin polymer, olefin polymer prepared by said method and said olefin polymer as modifier of polystyrene resin and / or acrylonitrile-butadiene-styrene resin application

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

Examples

Experimental program
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Effect test

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, a monofunctional organolithium initiator and a conjugated diene monomer and an inert solvent are continuously introduced into the first tank of a continuous polymerization reaction device comprising at least three series polymerization reactors to carry out the first polymerization reaction;

[0030] (2) Control the conversion rate of the conjugated diene monomer at the outlet of the first kettle to be greater than or equal to 97%, and continuously introduce the multifunctional coupling agent into the second polymerization reactor of the continuous polymerization reaction device to carry out Coupling reaction; the molar ratio of the total coupling groups in the polyfunctional coupling agent added per unit time to the monofunctional organolithium initiator added per unit time is 0.40-0.55:1;

[0031] (3) terminator and monovinyla...

Embodiment approach

[0032] According to the present invention, the preparation of the olefin polymer can be implemented by various existing conventional methods. According to a specific embodiment of the present invention, the preparation method of the olefin polymer can be carried out in three series-connected polymerization reactors, and the feeding mode of feeding from the bottom to the top is adopted to implement full tank operation. Solvent, conjugated diene monomer, initiator and other reaction aids are added from the bottom of the first kettle, and after the reaction materials stay in the first kettle for a period of time, they overflow from the top of the first kettle to the bottom of the second kettle; Add from the bottom of the second kettle, and after a certain residence time, the reaction material overflows from the top of the second kettle to the bottom of the third kettle; discharge.

[0033] According to the present invention, the type of the inert gas may be conventionally select...

Embodiment 1

[0077] This example is used to illustrate the olefin polymer provided by the present invention and its preparation method.

[0078] The reaction apparatus used in this example included three 5-liter polymerization reactors connected in series. Under the protective atmosphere of high-purity nitrogen, the residence time of the materials in the first kettle of the control system is 70 minutes, and 2490g / h of raffinate, 372g / h of 1,3-butadiene, and 0.302g / h of tetrahydrofuran are continuously added to the bottom of the first kettle ( 100ppm), 0.343g / h of 1,2-butadiene and 0.595g / h of n-butyllithium, control the temperature of the first kettle reaction at 70°C, and control the pressure at 0.3MPa, so that 1,3-butadiene in the first polymerization reaction. The reaction material of the first still overflows from the top of the first still to the bottom of the second still (the conversion rate of 1,3-butadiene at the outlet of the first still is 99.4%), and continuously adds 0.178% s...

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Abstract

The invention discloses an olefin polymer, a preparation method and an application thereof. The olefin polymer contains a star-shaped conjugated diene homopolymer, a liner conjugated diene homopolymer and a liner conjugated diene-mono-vinyl aromatic copolymer, the molecular weight distribution of the olefin polymer is unimodal distribution, the mooney viscosity ML1+4 of the olefin polymer at the temperature of lower than 100 DEG C is 45-70, and the viscosity of a styrene solution with concentration being 5wt% of the olefin polymer is 0.02-0.04 Pa.s at the temperature of 25 DEG C. The olefin polymer can endow resin with high impact intensity and high glossiness.

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 used as polystyrene resin and / or acrylonitrile-butadiene-styrene resin application of 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 maintain...

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 吕万树李建成王雪毕海鹏李传清刘天鹤鲁文平
Owner CHINA PETROLEUM & CHEM CORP
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