High-toughened chloroethylene grafted copolymer and preparation method thereof

A technology of graft copolymer and vinyl chloride, which is applied in the field of vinyl chloride graft polymer, can solve the problem of insufficient grafting active points of acrylate rubber phase, and achieve excellent impact resistance, excellent processability, and high impact strength Effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the problem of insufficient grafting activity points of acrylate rubber phase in the process of grafting vinyl chloride monomer to acr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Example 1

[0058] (1) Preparation of acrylic rubber latex (A1)

[0059] Acrylic rubber core preparation formula

[0060] Butyl acrylate 96.5 parts

[0061] Divinylbenzene 0.5 part

[0062] Sodium lauryl sulfate 0.45 parts

[0063] 0.35 parts of potassium persulfate

[0064] Desalted water 245 parts

[0065] Add the desalinated water, the emulsifier sodium lauryl sulfate and the butyl acrylate monomer mixed with divinylbenzene to a 1000mL glass reactor equipped with a reflux condenser, turn on the stirring, heat up to 70°C, and add it to the kettle at the same time Blow in nitrogen to replace the oxygen in it, and keep it at 70°C for 10 minutes, then add an aqueous initiator solution with potassium persulfate dissolved in the kettle to initiate polymerization. After 2.0 hours of reaction, take a sample, and the solution has turned blue. The emulsion has a volume average particle siz...

Example Embodiment

[0082] Example 2

[0083] The preparation method of the acrylic rubber latex (A2) with a core-shell structure with a surface rich in active double bonds is the same as in Example 1, and the graft polymerization method with vinyl chloride is also the same as that in Example 1, except that it is different from vinyl chloride. The amount of acrylic rubber latex (A2) (dry basis) for graft copolymerization is 4.0 parts, and the final vinyl chloride grafted acrylic rubber copolymer (B2) product contains 4.8% acrylic rubber phase. The products were processed and tested, and the results are listed in Table 1.

Example Embodiment

[0084] Example 3

[0085] The preparation method of acrylic rubber latex (A3) with core-shell structure with rich active double bonds on the surface is the same as in Example 1, and the graft polymerization method with vinyl chloride is also the same as that in Example 1. The difference is that with vinyl chloride The amount of graft copolymerized acrylic rubber latex (A3) (dry basis) is 9.0 parts, and the final vinyl chloride grafted acrylic rubber copolymer (B3) product contains an acrylic rubber phase mass fraction of 10.2%. The products were processed and tested, and the results are listed in Table 1.

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Abstract

The invention discloses a high-toughened chloroethylene grafted copolymer and a preparation method thereof, and belongs to the field of high polymer materials. The high-toughened chloroethylene grafted copolymer is characterized in that the graft copolymerization process is divided into two stages for preparing the chloroethylene grafted copolymer, wherein the first stage is to prepare acrylate rubber latex which adopts a core-shell structure and is rich in unsaturated double bond active grafting sites on the surface; the second stage is to carry out graft copolymerization to 1-10% of the acrylate rubber latex and 90-99% of chloroethylene in mass fraction; the acrylate monomer is copolymerized with the crosslinking monomers containing two or more non-conjugated double bonds to prepare the crosslinked polymer latex as a core, and then the crosslinking monomers are polymerized on the surface of the core to form a shell, so as to prepare the acrylate rubber latex, the average grain diameter of which is 0.080-0.500 microns. The copolymer resin prepared by the preparation method disclosed by the invention is excellent in shock strength and processability; the extra impact modifier is not required to be used.

Description

technical field [0001] A highly toughened vinyl chloride graft copolymer and a preparation method thereof belong to the technical field of polymer materials, and in particular relate to a vinyl chloride graft polymer toughened by an acrylate polymer. Background technique [0002] Polyvinyl chloride resin products are cheap, and have good processing performance, mechanical properties and chemical stability, and are widely used in daily life and industrial production fields. Since the polyvinyl chloride resin itself is relatively brittle, its strength and toughness need to be improved. [0003] In order to improve the strength and toughness of the resin, many methods have been proposed, mainly including physical mixing method and chemical modification method. The physical modification method includes adding impact modifiers such as MBS (methyl methacrylate-butadiene-styrene terpolymer) resin, impact-resistant ACR to the polyvinyl chloride resin during the processing of the po...

Claims

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Application Information

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IPC IPC(8): C08F265/04C08F214/06
Inventor 张磊李留忠车万里李静张立红梁斌张勇
Owner CHINA PETROLEUM & CHEM CORP
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