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Self-stabilizing polyvinyl chloride resin preparation method

A polyvinyl chloride resin and self-stabilizing technology, which is applied in the field of self-stabilizing polyvinyl chloride resin and its preparation, can solve the problems of adding organic tin environmental protection heat stabilizers and other problems, so as to avoid changes in polymer properties, slow down dehydrochlorination, The effect of delaying the generation of free radicals

Active Publication Date: 2020-01-03
YIBIN TIANYUAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method of self-stabilizing polyvinyl chloride resin, which solves the problem that heat stabilizers such as organotin that do not meet environmental protection requirements need to be added during the processing of transparent rigid polyvinyl chloride resin

Method used

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  • Self-stabilizing polyvinyl chloride resin preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Get the production raw material of following weight part: Deionized water: 160 parts; Vinyl chloride: 100 parts; Main dispersant: 0.016 part; Auxiliary dispersant: 0.005 part; Antioxidant: 0.006 part; pH regulator: 0.006 part; Terminator: 0.015 part.

[0031] The main dispersant is composed of two kinds of polyvinyl alcohol and hydroxypropyl methylcellulose with different degrees of alcoholysis, that is, 0.008 parts of KH-20 with a degree of alcoholysis of 81, 0.004 parts of L-10 with a degree of alcoholysis of 72, Composed of 0.004 parts F-50 hydroxypropyl methylcellulose. The auxiliary dispersant is 0.005 parts of polyvinyl alcohol LL-02 with an alcoholysis degree of 50. The composite initiator is composed of 0.008 parts of di(2-ethyl)hexyl peroxydicarbonate and 0.004 parts of cumyl peroxyneodecanoate. The pH regulator is ammonium bicarbonate, and the addition amount is 0.006 parts. The composite terminator consists of 0.006 parts of N,N-diethylhydroxylamine, 0.006...

Embodiment 2

[0034] Get the production raw material of following weight part: Deionized water: 160 parts; Vinyl chloride: 100 parts; Main dispersant: 0.016 part; Auxiliary dispersant: 0.005 part; Antioxidant: 0.006 part; pH regulator: 0.006 part; Terminator: 0.015 part.

[0035] The main dispersant is composed of two kinds of polyvinyl alcohol and hydroxypropyl methylcellulose with different degrees of alcoholysis, that is, 0.008 parts of KH-20 with a degree of alcoholysis of 81, 0.004 parts of L-10 with a degree of alcoholysis of 72, Composed of 0.004 parts F-50 hydroxypropyl methylcellulose. The auxiliary dispersant is 0.005 parts of polyvinyl alcohol LL-02 with an alcoholysis degree of 50. The composite initiator is composed of 0.008 parts of di(2-ethyl)hexyl peroxydicarbonate and 0.004 parts of cumyl peroxyneodecanoate. The pH regulator is ammonium bicarbonate, and the addition amount is 0.006 parts. The composite terminator consists of 0.006 parts of N,N-diethylhydroxylamine, 0.006...

Embodiment 3

[0038] Get the production raw material of following weight part: Deionized water: 160 parts; Vinyl chloride: 100 parts; Main dispersant: 0.016 part; Auxiliary dispersant: 0.005 part; Antioxidant: 0.006 part; pH regulator: 0.006 part; Terminator: 0.015 part.

[0039] The main dispersant is composed of two kinds of polyvinyl alcohol and hydroxypropyl methylcellulose with different degrees of alcoholysis, that is, 0.008 parts of KH-20 with a degree of alcoholysis of 81, 0.004 parts of L-10 with a degree of alcoholysis of 72, Composed of 0.004 parts F-50 hydroxypropyl methylcellulose. The auxiliary dispersant is 0.005 parts of polyvinyl alcohol LL-02 with an alcoholysis degree of 50. The composite initiator is composed of 0.008 parts of di(2-ethyl)hexyl peroxydicarbonate and 0.004 parts of cumyl peroxyneodecanoate. The pH regulator is ammonium bicarbonate, and the addition amount is 0.006 parts. The composite terminator consists of 0.006 parts of N,N-diethylhydroxylamine, 0.006...

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Abstract

The invention discloses a self-stabilizing polyvinyl chloride resin preparation method, wherein the self-stabilizing polyvinyl chloride resin is prepared from the following production raw materials byweight: 100-200 parts of deionized water, 100 parts of vinyl chloride, 0.006-0.02 part of a dispersing agent, 0.008-0.015 part of an initiator, 0.008-0.03 part of a heat stabilizer, 0.002-0.01 part of an antioxidant, 0.003-0.01 part of a pH regulator and 0.008-0.02 part of a terminating agent, wherein the heat stabilizer is an epoxy compound stabilizer. According to the invention, the epoxy compound heat stabilizer is added during the preparation of the polyvinyl chloride resin, wherein the epoxy compound heat stabilizer as the auxiliary stabilizer only has the common stabilizing effect, thesteric hindrance of the epoxy group of the heat stabilizer is large, and under the synergistic effect of the epoxy compound heat stabilizer, the antioxidant, the terminating agent and the like added during the preparation of the polyvinyl chloride resin, HCl released by the degradation of PVC is effectively absorbed, the catalytic effect of HCl to the degradation of PVC is inhibited, the decomposition reaction of the polyvinyl chloride resin in the forming processing process is effectively prevented, and the excellent thermal stability effect is achieved.

Description

technical field [0001] The invention relates to the field of polyvinyl chloride resin synthesis, in particular to a self-stabilizing polyvinyl chloride resin and a preparation method thereof. Background technique [0002] During the processing of polyvinyl chloride resin (PVC resin), the temperature is usually above 150°C, while PVC resin begins to decompose at 120°C, releasing HCL gas. If the decomposition is not inhibited, HCL will promote the decomposition and accelerate the decomposition process of PVC resin. A series of chain reactions caused by the de-HCL reaction finally lead to the breakage of the macromolecular chain, resulting in discoloration of the material and poor performance, which is a defect of polyvinyl chloride resin. In order to solve the problem of poor thermal stability of PVC in the processing industry, heat stabilizers are usually added during the molding process to prevent or delay the decomposition reaction of PVC products during the molding process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F114/06C08F2/44C08K5/1515C08K5/13C08K5/526
CPCC08F114/06C08K5/1515C08K5/13C08K5/526C08F2/44
Inventor 陈洪文仕敏缑可贞徐慧远谢濠江
Owner YIBIN TIANYUAN GRP CO LTD
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