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High gel content extinction polyvinyl chloride resin and preparation method thereof

A polyvinyl chloride resin and high-gel technology, which is applied in the field of polyvinyl chloride resin production, can solve the problems of increased intermolecular entanglement, prolonged processing and plasticization time, and increased disentanglement time, so as to achieve stable reaction and product quality. Uniform, less fish-eye effect

Active Publication Date: 2022-06-07
YIBIN HAIFENG HERUI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the gel content is too low, the matting effect will not be good; if the content is too high, the processing performance will deteriorate
[0006] However, the gel content of high gel content matte PVC resin is above 30%, so due to the existence of a large amount of gel, the degree of entanglement between molecules increases during processing, and the untangle time also increases, so the processing and plasticizing time Prolongation and increase in melt viscosity

Method used

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  • High gel content extinction polyvinyl chloride resin and preparation method thereof
  • High gel content extinction polyvinyl chloride resin and preparation method thereof
  • High gel content extinction polyvinyl chloride resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Measure raw materials according to the following production raw material formula: 160 parts of deionized water, 100 parts of matt polyvinyl chloride resin, 3.6 parts of crosslinking agent monomer, 0.009 part of dispersant, 0.015 part of initiator, 0.8 part of stabilizer, pH 0.02 part of conditioner, 0.4 part of stearic acid, 0.5 part of stearyl alcohol, and 0.008 part of terminator.

[0035] The degree of polymerization of the matt polyvinyl chloride resin is 1000, the mass percentage of gel is 8%, and the crosslinking agent monomer is composed of 2.0 parts of diallyl fumarate and 1.6 parts of trimethylolpropane triacrylate. The dispersant is composed of 0.002 part of KH-20 with an alcoholysis degree of 81, 0.003 part of L-10 with an alcoholysis degree of 72, and 0.004 part of F-50 hydroxypropyl methylcellulose. The composite initiator was composed of 0.007 part of bis(3-methoxybutyl peroxydicarbonate) and 0.008 part of sodium persulfate. The stabilizers used 0.3 p...

Embodiment 2

[0044] (1) Measure raw materials according to the following production raw material formula: 160 parts of deionized water, 100 parts of matt polyvinyl chloride resin, 3.6 parts of crosslinking agent monomer, 0.009 part of dispersant, 0.015 part of initiator, 0.8 part of stabilizer, pH 0.02 part of conditioner, 0.4 part of stearic acid, 0.5 part of stearyl alcohol, and 0.008 part of terminator.

[0045] The degree of polymerization of the matt polyvinyl chloride resin is 1000, the mass percentage of gel is 5%, and the crosslinking agent monomer is composed of 2.0 parts of diallyl phthalate and 1.6 parts of trimethylolpropane triacrylate. The dispersant is composed of 0.002 part of KH-20 with an alcoholysis degree of 81, 0.003 part of L-10 with an alcoholysis degree of 72, and 0.004 part of F-50 hydroxypropyl methylcellulose. The composite initiator consists of 0.007 parts of benzoyl peroxide and 0.008 parts of sodium persulfate. The stabilizers used 0.3 part of zinc stearate a...

Embodiment 3

[0054] (1) Measure raw materials according to the following production raw material formula: 160 parts of deionized water, 100 parts of matt polyvinyl chloride resin, 3.8 parts of crosslinking agent monomer, 0.009 part of dispersant, 0.018 part of initiator, 0.8 part of stabilizer, pH 0.02 part of conditioner, 0.4 part of stearic acid, 0.5 part of stearyl alcohol, and 0.01 part of terminator.

[0055] The degree of polymerization of the matt polyvinyl chloride resin is 1000, the mass percentage of gel is 5%, and the crosslinking agent monomer is composed of 2.2 parts of diallyl phthalate and 1.6 parts of trimethylolpropane triacrylate. The dispersant is composed of 0.002 part of KH-20 with an alcoholysis degree of 81, 0.003 part of L-10 with an alcoholysis degree of 72, and 0.004 part of F-50 hydroxypropyl methylcellulose. The composite initiator is composed of 0.009 part of benzoyl peroxide and 0.01 part of sodium persulfate. The stabilizers used 0.3 part of zinc stearate an...

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Abstract

The invention discloses a matte polyvinyl chloride resin with high gel content and a preparation method thereof. The production steps include: S1, measuring raw materials; S2, soaking the matte polyvinyl chloride resin for 1 to 4 hours; S3, adding a crosslinking agent The body and dispersant continue to soak for 1 to 3 hours; S4, adding part of the initiator to react; S5, adding the remaining initiator to continue the reaction; S6, adjusting the pH of the system, adding a stabilizer; S7, increasing the reaction temperature before the end of the reaction, and adding calcium stearate and stearyl alcohol; S8, adding a terminator, removing residual monomers by steam stripping, and centrifugal drying to remove moisture to obtain a matte polyvinyl chloride resin. Its advantages are: use low gel content matting polyvinyl chloride resin as raw material, prepare high gel content matting polyvinyl chloride resin under normal pressure or low pressure conditions, and avoid Produce implosion, reduce the "fish eye" produced in the production of extinction PVC, improve the extinction effect, improve the thermal stability of the product, and improve the processing performance.

Description

technical field [0001] The invention relates to a production technology of polyvinyl chloride resin, in particular to a production method of matte polyvinyl chloride resin. Background technique [0002] High-gel content matt polyvinyl chloride resin usually refers to a matt polyvinyl chloride resin material with a gel content greater than or equal to 30%, which is used for products that require high surface gloss. [0003] For the production of ordinary extinction PVC resin, the chemical extinction usually used at home and abroad is the suspension method. For example, in the patent CN110194814A, it is mentioned that in the existing device for producing PVC resin by the suspension system, all the crosslinking agent is added in the initial stage of the polymerization reaction. Or it can be added in batches during the polymerization process to synthesize the matt PVC resin. In this patent, in the commonly used suspension polymerization process, when the polymerization conversi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F259/04C08F222/28C08F222/26C08F222/14C08F222/20
CPCC08F259/04C08F222/28C08F222/103C08F222/26
Inventor 文仕敏缑可贞徐慧远谢濠江罗源军高在平梁益超王万萍
Owner YIBIN HAIFENG HERUI
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