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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 acrylate rubber phase, a method for preparing vinyl chloride graft copolymer resin from acrylate rubber latex with core-shell structure is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0059] Acrylate Rubber Core Preparation Recipe

[0060] Butyl acrylate 96.5 parts

[0061] 0.5 parts of divinylbenzene

[0062] Sodium Lauryl Sulfate 0.45 parts

[0063] Potassium persulfate 0.35 parts

[0064] Desalted water 245 parts

[0065] Add desalted water, emulsifier sodium lauryl sulfate, and butyl acrylate monomer mixed with divinylbenzene into a 1000mL glass reactor equipped with a reflux condenser, start stirring, raise the temperature to 70°C, and simultaneously pour Blow in nitrogen to replace the oxygen in it, and keep it at 70°C for 10 minutes, then add an aqueous solution of initiator dissolved in potassium persulfate to the kettle to initiate polymerization, and take a sample after reacting for 2.0 hours. The solution has turned blue The emulsion has a volume average particle size of 0.117 μm measured...

Embodiment 2

[0083] The preparation method of the acrylate rubber latex (A2) with a core-shell structure rich in active double bonds on the surface is the same as in Example 1, and its graft polymerization method with vinyl chloride is also the same as in Example 1, except that it is mixed with vinyl chloride Carrying out the consumption of the acrylate rubber latex (A2) (dry base) of graft copolymerization is 4.0 parts, and the mass fraction of acrylate rubber phase in the copolymer (B2) product of vinyl chloride grafted acrylate rubber is 4.8%, and the obtained The product was processed and tested, and the results are listed in Table 1.

Embodiment 3

[0085] The preparation method of acrylate rubber latex (A3) with a core-shell structure rich in 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 in Example 1, except that it is mixed with vinyl chloride Carrying out the consumption of the acrylate rubber latex (A3) (dry basis) of graft copolymerization is 9.0 parts, and the mass fraction of acrylate rubber phase in the copolymer (B3) product of vinyl chloride grafted acrylate rubber is 10.2%, and the obtained The product was 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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