A kind of narrow dispersion graft copolymerization ABS composition and preparation method thereof

A technology of graft polymer and composition, which is applied in the field of high-efficiency preparation of ABS composition and its narrowly dispersed graft copolymer, which can solve problems such as complex process, low conversion rate, and long grafting time

Active Publication Date: 2022-05-27
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing patent CN105189588A mentions the preparation method of the bimodal graft structure with small particle size to improve the surface gloss of the ABS resin composition, but the various schemes in the prior art may have complex processes, long grafting time and low conversion rate and other shortcomings, it is difficult to ensure industrial production

Method used

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  • A kind of narrow dispersion graft copolymerization ABS composition and preparation method thereof
  • A kind of narrow dispersion graft copolymerization ABS composition and preparation method thereof
  • A kind of narrow dispersion graft copolymerization ABS composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: Preparation of ABS Grafted Polymer

[0033] (1.1) In parts by weight, add 0.4 part of emulsifier sodium lauryl sulfate, 22.5 parts of deionized water, styrene and acrylonitrile monomers to a total of 40 parts, the ratio of styrene to acrylonitrile is 2.5 / 1, and 0.12 parts are Cumene hydrogen oxide, shake to become a pre-emulsion;

[0034] (1.2) Weigh 0.04 part of sodium pyrophosphate, 0.1 part of fructose, 0.01 part of ferrous sulfate, 5 parts of deionized water, 0.04 part of cumene hydrogen peroxide, dissolve and mix and place 60 parts of dry polybutadiene In the latex, the pre-emulsion was then injected into the polybutadiene latex by dropwise feeding under nitrogen protection under the condition of controlling the reaction temperature at 57° C. and the rotating speed of 300 rpm, and the feeding time was 60 min, and the feeding was carried out by dropwise feeding at the same time. A potassium hydroxide solution with a mass concentration of 5% was injected, wh...

Embodiment 2

[0040] Step 1: Preparation of ABS Grafted Polymer

[0041] (1.1) In parts by weight, 0.6 part of emulsifier disproportionated potassium rosinate soap, 33.75 parts of deionized water, styrene and acrylonitrile monomers total 60 parts, the ratio of styrene to acrylonitrile is 2.5 / 1, 0.18 parts of peroxide Hydrogen cumene, shake to become a pre-emulsion;

[0042] (1.2) Weigh 0.06 part of sodium pyrophosphate, 0.15 part of fructose, 0.015 part of ferrous sulfate, 7.5 parts of deionized water, 0.06 part of cumene hydrogen peroxide, dissolve and mix and place 40 parts of dry polybutadiene In the latex, the pre-emulsion was injected into the polybutadiene latex by dropwise feeding under the conditions of controlling the reaction temperature at 57 ° C and the rotating speed at 300 rpm, and the feeding time was 60 min. % potassium hydroxide solution, wherein 0.225 parts of potassium hydroxide, 4.275 parts of deionized water, keep the pH of the reaction system between 9.4-9.7;

[0043...

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Abstract

The invention discloses a narrowly dispersed graft copolymerized ABS composition and a preparation method thereof. The fast feed method of pre-emulsion is adopted to reduce graft polymerization time and energy consumption; adding lye dropwise maintains the constant pH of latex and reduces the aggregation of rubber particles The possibility of obtaining grafted rubber particles with narrow distribution; adding a good solvent for diene rubber, ethylenically unsaturated carboxylate monomer, can effectively improve the final monomer conversion rate of the grafting process and reduce the vinyl content caused by rapid feeding. The residual amount of benzene monomer and vinyl cyanide monomer can reduce the influence of side reactions such as cyclization of vinyl cyanide monomer on the apparent performance of ABS thermoplastic resin composition, and at the same time, the diffusion of ethylenically unsaturated carboxylate monomer To the inside of the rubber particles, increase the internal grafting and make the inside of the rubber particles properly cross-linked, improve the dispersion and toughening effect of the ABS graft copolymer in the matrix resin, and finally obtain a thermoplastic with good appearance and excellent impact resistance. resin composition.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an efficient preparation method of an ABS composition and a narrowly dispersed graft copolymer thereof. Background technique [0002] ABS resin is one of the representative works of human beings in the field of materials. It is widely used in the fields of household appliance shells and other fields due to its excellent mechanical properties and aesthetic properties. With the improvement of living standards, people's requirements for the aesthetics of daily necessities are also increasing, and the market's demand for the whiteness of household air conditioners and refrigerator shells is more obvious. [0003] At present, the industrial methods for preparing ABS resin mainly include continuous bulk method and emulsion graft blending method. Although continuous bulk polymerization technology has been continuously developed in recent years, it has not been full...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F279/02C08F212/10C08F220/44C08F220/14C08F2/26C08L25/12C08L55/02
CPCC08F279/02C08F2/26C08L25/12C08F212/10C08F220/44C08F220/14C08L55/02
Inventor 刘伯军徐璐张明耀胡艺伟张艳海刘洋吴高澄
Owner CHANGCHUN UNIV OF TECH
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