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A polyvinyl chloride processing aid masterbatch with toughening function and preparation method thereof

A technology of polyvinyl chloride and processing aids, which is applied in the solid phase force chemical modification of polymers and in the field of polymer processing, can solve the problems of no toughening function, reduced product strength, complicated preparation process, etc. Value, competitiveness enhancement, and wide-ranging effects

Active Publication Date: 2021-08-27
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the reduction of product strength by toughening PVC with traditional elastomers, traditional processing modification additives have disadvantages such as complicated preparation process, easy pollution, and lack of toughening function.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]Example 1 The SG-8 polyvinyl chloride resin with an average degree of polymerization of about 700 is used, and the acrylic core-shell copolymer is an elastomer, and the amount of the elastomer accounts for 16% (mass) of the total amount of the polyvinyl chloride resin and the elastomer , first put steel balls, polyvinyl chloride resin, and stabilizer in turn under low-speed stirring, the mass ratio of steel balls to the total material is 13:1, and slowly add absolute ethanol, after mixing evenly, adjust the speed to 800 rpm , the vibrating ball milling time is 2 hours and then adjusted to the low-speed running state, adding the weighed acrylate core-shell structure copolymer powder, mixing evenly, adjusting the rotating speed to 800 rpm, and continuing vibrating ball milling for 1 hour, and the acrylate can be obtained. The polyvinyl chloride processing aid masterbatch with core-shell copolymer as elastomer is denoted as MG-1. Then, after fully kneading 1.7 parts of the ...

Embodiment 2

[0023] Example 2 SG-8 polyvinyl chloride resin with an average degree of polymerization of about 700 is used, and the acrylic core-shell copolymer is an elastomer, and the amount of the elastomer accounts for 28% (mass) of the total amount of the polyvinyl chloride resin and the elastomer , first put steel balls, polyvinyl chloride resin, and stabilizer in turn under low-speed stirring, the mass ratio of steel balls to the total material is 13:1, and slowly add absolute ethanol, after mixing evenly, adjust the speed to 800 rpm , the vibrating ball milling time is 2 hours and then adjusted to the low-speed running state, adding the weighed acrylate core-shell structure copolymer powder, mixing evenly, adjusting the rotating speed to 800 rpm, and continuing vibrating ball milling for 1 hour, and the acrylate can be obtained. The polyvinyl chloride processing aid masterbatch with core-shell copolymer as elastomer is denoted as MG-2. Then, after fully kneading 1.7 parts of the obt...

Embodiment 3

[0024] Example 3 The SG-5 polyvinyl chloride resin with an average degree of polymerization of about 1050 is used, and the methyl methacrylate-butadiene-styrene core-shell copolymer is the elastomer, and the amount of the elastomer accounts for the proportion of the polyvinyl chloride resin and the elastic 28% (mass) of the total volume of the solid, first put in steel balls, polyvinyl chloride resin, and stabilizer in turn under low-speed stirring, the mass ratio of steel balls to the total material is 13:1, and slowly add absolute ethanol, mix After uniformity, adjust the speed to 800 rpm, adjust the vibration ball milling time to low speed after 2 hours, add the weighed methyl methacrylate-butadiene-styrene core-shell copolymer powder, and adjust the speed after mixing evenly 800 rpm, continue vibrating ball milling for 1 h, and you can get a polyvinyl chloride processing aid masterbatch with methyl methacrylate-butadiene-styrene core-shell copolymer as the elastomer, denote...

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PUM

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Abstract

The invention discloses a polyvinyl chloride processing aid masterbatch with toughening function and a preparation method thereof. Broken, refractory crystallites are eliminated, and high molecular weight polyvinyl chloride molecular chains are interrupted. This special structure makes polyvinyl chloride agglomerated particles easy to plasticize into linear flow melt molecules during processing, which can effectively reduce polyvinyl chloride. The plasticizing temperature of vinyl chloride; at the same time, under the action of stress, the molecular chain of polyvinyl chloride is broken, and free radicals or ionic bonds are generated, which can be covalently or ionic bonds with the subsequently introduced elastomer molecules to cause copolymerization or other interact to prepare a polyvinyl chloride processing aid masterbatch with toughening function.

Description

technical field [0001] The invention relates to the technical field of polymer processing, more specifically to the technical field of solid-phase mechanochemical modification of polymers. . Background technique [0002] As one of the five general-purpose resins, polyvinyl chloride resin is second only to polyethylene and polypropylene in output. With its high mechanical strength and relatively low price, it has been widely used in various fields. [0003] Polyvinyl chloride resin is a non-petroleum-based polymer material, which can be synthesized through the abundant calcium carbide resources in my country, and is not affected by the international crude oil market. It is an environmentally friendly and sustainable material. Since the 21st century, with the development of my country's construction industry and plastic processing industry, the demand for polyvinyl chloride has also been increasing, and the development of the polyvinyl chloride industry has also entered a st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L33/04C08L51/04C08L23/28C08J3/22
CPCC08J3/226C08J2423/28C08J2427/06C08J2433/04C08J2451/04
Inventor 熊英李雪健郭少云
Owner SICHUAN UNIV