A method for preparing CPVC toughened and modified by silicone-acrylate rubber and nanometer calcium carbonate synergistically

A nano-calcium carbonate and acrylate technology, applied in the field of CPVC pipe production, can solve the problems of influence, general toughening effect, disadvantage, etc., and achieve the effect of preventing cracks, good interfacial compatibility, and enhancing movement ability.

Inactive Publication Date: 2017-09-26
安徽盛华管业有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] The traditional impact toughening modification uses rubber-like elastomer as a toughening agent, which has a good toughening effect, but at the same time, it also has an adverse effect on other properties of the matrix material (such as rigidity and heat resistance)
Adding rigid particles alone can maintain the rigidity of the material, but the toughening effect is general

Method used

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Embodiment Construction

[0016] A preparation method of CPVC synergistically toughened and modified by organosilicon-acrylate rubber and nanometer calcium carbonate, is characterized in that, comprises the following steps:

[0017] (1) Ultrasonic dispersion of nano-calcium carbonate and deionized water for 1-2 hours to obtain a nano-calcium carbonate slurry with a mass fraction of 10%;

[0018] (2) Put the nano-calcium carbonate slurry prepared above in the reaction kettle and stir to raise the temperature to 80-90°C, add a certain amount of modifier, keep the temperature constant, stir and react for 2-3 hours, suction filter, dry, Jet crushing and sieving to obtain modified nano-calcium carbonate;

[0019] (3) Put the silicone-acrylate rubber and the modified nano-calcium carbonate in step (2) into a torque rheometer and mix for 10-15min at a temperature of 100-110°C to obtain a silicone-acrylate rubber master Rubber mixing;

[0020] (4) Put CPVC and the silicone-acrylate rubber masterbatch prepare...

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Abstract

A method for preparing CPVC toughened and modified by silicone-acrylate rubber and nanometer calcium carbonate synergistically is disclosed. The silicone-acrylate rubber and the nanometer calcium carbonate are adopted to synergistically modify CPVC. The silicone-acrylate rubber in the CPVC shows a typical 'island' structure, and when a material is shocked, a large amount of crazes can be induced to form shear bands, and shock energy can be absorbed and transferred to surrounding CPVC resin, thus preventing generation of cracks. An aliphatic amine type modifier is adopted to modify the nanometer calcium carbonate, an amine group can interact with carboxyl, hydroxy, and other groups on the surface of the nanometer calcium carbonate to form ionic bonds and hydrogen bonds, and can react with active chlorine atoms in the CPVC, and a part of the modifier can be grafted to the CPVC molecular chain to enhance motion capability of the molecular chain segment. The silicone-acrylate rubber and the nanometer calcium carbonate are synergistic, thus improving toughness and shock resistance of a composite material.

Description

technical field [0001] The invention relates to the field of CPVC pipe production, in particular to a method for preparing CPVC synergistically toughened and modified by organosilicon-acrylate rubber and nano-calcium carbonate. Background technique [0002] Chlorinated polyvinyl chloride (CPVC) has a high heat distortion temperature and unique chemical corrosion resistance due to the presence of a large number of chlorine atoms in its molecular chain, which increases the polarity and rigidity of its molecular chain, so CPVC is widely used Used as a high-quality heat-resistant material and anti-corrosion plastic. It is widely used in the production of pipes and fittings for hot water transportation and corrosive fluid transportation, large-diameter cable buried sheath pipes, etc. At the same time, due to the increase of chlorine content in CPVC, its brittleness increases, which is manifested by the material's low impact strength and poor toughness. Therefore, it is necessar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/24C08L43/04C08L51/08C08L91/06C08K9/04C08K3/26C08K5/09C08J3/22
CPCC08L27/24C08J3/226C08J2327/24C08J2443/04C08J2451/08C08K2003/265C08K2201/011C08L2203/18C08L2205/03C08L2207/02C08L43/04C08L51/085C08L91/06C08K9/04C08K3/26C08K5/09
Inventor 盛付林
Owner 安徽盛华管业有限公司
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