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Application of butadiene-b-isoprene polymer

A technology of isoprene and polyisoprene, which is applied in the field of modified polymer synthesis, can solve problems such as poor surface gloss, and achieve the effects of uniform distribution, increased rubber volume fraction, and excellent rubber properties

Active Publication Date: 2017-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since high-cis rubber and low-cis rubber have their own advantages, Japanese patent JP100810 discloses a method of using butadiene rubber polymers with different cis content as toughener to synthesize HIPS, and controlling the particle size of rubber particles through different cis content , the results show that the resin has good impact strength, but the surface gloss is not good

Method used

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  • Application of butadiene-b-isoprene polymer
  • Application of butadiene-b-isoprene polymer
  • Application of butadiene-b-isoprene polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]In a 5L jacketed stainless steel polymerization kettle replaced with nitrogen, introduce 2500mL of purified cyclohexane, add 0.5mL of 0.2mol / L ditetrahydrofurfurylpropane and 1.25mmol of n-butyllithium and stir, and use a jacket Heat the hot water to 70-80°C, add 265mL of isoprene for one stage of polymerization until the basic reaction of the monomer is complete, then add 194mL of butadiene for the second stage of polymerization until the monomer is completely reacted, then add 0.06g of ethanol Terminate the polymerization reaction. Put the glue out of the polymerization kettle, add 0.75g of antioxidant 1076 and 0.75g of antioxidant 168, stir evenly, and conduct drying treatment after water precipitation and coagulation to obtain dry polymer glue. GPC chromatographic test obtains that the number-average molecular weight of this polymer is 240,000, the polyisoprene segment content is 60% (mass percentage), and the polybutadiene segment content is 40% (mass percentage), a...

Embodiment 2

[0054] In a 5L jacketed stainless steel polymerization kettle replaced with nitrogen, introduce 2500mL of purified cyclohexane, add 0.5mL of 0.2mol / L ditetrahydrofurfurylpropane and 4.28mmol of n-butyllithium and stir, and use a jacket Heat the hot water to 60-70°C, add 194mL of butadiene to carry out a first-stage polymerization reaction until the monomer reaction is complete, then add 265mL isoprene for the second-stage polymerization reaction until the monomer reaction is complete, add 2.7mL0.4mol / L SiCl 4 Coupling was carried out, and after the coupling reaction was completed, 0.06 g of ethanol was added to terminate the polymerization reaction.

[0055] Put the glue out of the polymerization kettle, add 0.75g of antioxidant 1076 and 0.75g of antioxidant 168, stir evenly, and conduct drying treatment after water precipitation and coagulation to obtain dry polymer glue. GPC chromatographic test obtains that the single-arm number-average molecular weight of this polymer is...

Embodiment 3

[0057] In the 500mL there-necked flask equipped with agitator, reflux condenser and nitrogen protection, add the butylpentyl polymer colloid sample, styrene, ethylbenzene etc. synthesized in Example 1, wherein ethylbenzene is diluent (accounting for monomer total mass 20% of the total mass), the rubber content is 8% of the total mass, stir vigorously, add the initiator benzoyl peroxide BPO after the system is evenly mixed, react at 85°C for 6h, then heat up to 135°C for 2h, and heat Initiate further increases in conversion rates. Finally, it was devolatilized at 135°C for 2h. After the reaction is completed, the material is discharged, cut into pieces and cooled, and pumped in a vacuum oven at 40°C until the mass is constant, and its performance is tested.

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Abstract

The invention discloses application of a butadiene-b-isoprene polymer. The application is to copolymerize the linear or star-shaped butadiene-b-isoprene polymer with styrene in a grafted manner to prepare high impact polystyrene. The prepared high impact polystyrene is high in impact strength and high in bending performance; furthermore, the heat resistance and the elongation are obviously improved when compared with the heat resistance and the elongation of HIPS (high impact polystyrene) resin prepared from polybutadiene rubber.

Description

technical field [0001] The present invention relates to the application of butadiene-b-isoprene polymer, in particular to the application of butadiene-b-isoprene polymer in the synthesis of high-impact polystyrene toughened rubber, which belongs to modified Polymer synthesis technology field. Background technique [0002] High-impact polystyrene (HIPS), also known as rubber-modified polystyrene, is a two-phase copolymerization system including a rubber dispersed phase and a polystyrene continuous phase. Through the graft modification of rubber, the impact toughness and elasticity of polystyrene materials can be improved, while retaining its good strength and ease of processing, so it has a wide range of industrial applications. [0003] High-impact polystyrene has a "sea-island" structure formed by homopolystyrene and small rubber particles. Polymers formed by grafting homopolystyrene and styrene monomers onto rubber macromolecular chains and rubber phase composition. Whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F279/02C08F212/08C08F236/08C08F236/06
CPCC08F236/08C08F279/02C08F212/08C08F236/06
Inventor 宋丽莉贺卉昌左玲黎春荣
Owner CHINA PETROLEUM & CHEM CORP
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