Preparation method of matting polyvinyl chloride resin

A technology of polyvinyl chloride resin and matting polyvinyl chloride, which is applied in the field of preparation of matting polyvinyl chloride resin, can solve problems such as the number or size of the gel is not easy to be plasticized, the degradation of film products, and the appearance of the product are affected, and the matting effect is good. , Particles are regular, and the effect of improving uniformity

Active Publication Date: 2019-04-16
HANGZHOU ELECTROCHEM GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The matting resin contains a certain amount of gel components. Due to the amount and size of the gel in the matting resin of different production methods, there may be unevenness
Therefore, during processing, it is easy to produce crystal points that are not easy to be plasticized due to the unevenness of the number or size of the gel in the matting resin, resulting in spots on the surface of the product and affecting the appearance and even performance of the product.
Especially in the production of matting films, a large number of crystal points can easily cause perforation or even rupture of the film, resulting in degradation or even scrapping of film products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] With 6kg vinyl chloride monomer, 10kg deionized water, 8g initiator (di(2-ethylhexyl) peroxydicarbonate), 5g buffer (ammonium bicarbonate), 8g dispersant (5g polyvinyl alcohol, 3g Hydroxypropyl methyl cellulose) and 130 g of matting agent (polyethylene glycol dimethacrylate) were used as reaction materials. Among them, polyvinyl alcohol is a composite of polyvinyl alcohol with a high alcoholysis degree of 82% and a low alcoholysis degree of polyvinyl alcohol with an alcoholysis degree of 50%. The viscosity of the hydroxypropyl methylcellulose is 40 mPa·s, wherein the methoxy group content is 29%, and the hydroxypropyl content is 6%.

[0023] Take 1g of polyvinyl alcohol to pre-emulsify 130g of polyethylene glycol dimethacrylate: mix polyvinyl alcohol and polyethylene glycol dimethacrylate at room temperature to form a mixed solution, and stir the mixed solution at a speed of 50 rpm In order to carry out pre-emulsification, the pre-emulsified polyethylene glycol dimethacry...

Embodiment 2

[0026] With 6kg vinyl chloride monomer, 10kg deionized water, 7.5g initiator (cumyl peroxide neodecanoate), 3.6g buffer (sodium carbonate), 7.5g dispersant (4g polyvinyl alcohol, 3.5g hydroxyl Propyl methyl cellulose) and 150 g of matting agent (polyethylene glycol dimethacrylate) were used as reaction materials. Among them, polyvinyl alcohol is a composite of polyvinyl alcohol with a high alcoholysis degree of 80% and a low alcoholysis polyvinyl alcohol with a degree of alcoholysis of 45%. The viscosity of the hydroxypropyl methylcellulose is 50 mPa·s, in which the methoxy group content is 28%, and the hydroxypropyl content is 10%.

[0027] Take 0.5 g of hydroxypropyl methyl cellulose to pre-emulsify 150 g of polyethylene glycol dimethacrylate: mix hydroxypropyl methyl cellulose and polyethylene glycol dimethacrylate at room temperature to form a mixed solution, The mixed solution is stirred at a rotation speed of 80 rpm for pre-emulsification, and the pre-emulsified polyethyle...

Embodiment 3

[0030] With 6kg vinyl chloride monomer, 10kg deionized water, 8.5g initiator (tert-butyl peroxide neodecanoate), 3.6g buffer (sodium bicarbonate), 8.8g dispersant (5.2g polyvinyl alcohol, 3.6g Hydroxypropyl methyl cellulose) and 120 g of matting agent (diallyl maleate) were used as reaction materials. Among them, polyvinyl alcohol is a composite of polyvinyl alcohol with a medium alcoholysis degree of 75% and a low alcoholysis degree polyvinyl alcohol with an alcoholysis degree of 40%. The hydroxypropyl methyl cellulose has a viscosity of 55 mPa·s, wherein the methoxy group content is 28%, and the hydroxypropyl content is 8%.

[0031] Take 0.2g polyvinyl alcohol and 0.6g hydroxypropyl methylcellulose to pre-emulsify 120g diallyl maleate: mix polyvinyl alcohol, hydroxypropyl methylcellulose and maleic diene at room temperature The propyl ester forms a mixed solution, and the mixed solution is stirred at a rotation speed of 100 rpm for pre-emulsification, and the pre-emulsified di...

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Abstract

The invention provides a preparation method of extinction polyvinyl chloride resin. The preparation method comprises the following steps: acquiring vinyl chloride monomer, deionized water, an initiator, a buffering agent, a dispersant and a matting agent which serve as reaction raw materials; performing pre-emulsification treatment on the matting agent by use of part of the dispersant; adding the vinyl chloride monomer, the deionized water, the initiator, the buffering agent and the rest dispersant into a polymerization kettle, performing polyreaction, and adding the matting agent subjected to pre-emulsification treatment during the reaction process so as to prepare the extinction polyvinyl chloride resin, wherein the matting agent is a monomer or polymer containing two or more reaction active functional groups, the dosage of the deionized water accounts for 105-200% of the weight of the vinyl chloride monomer, the dosage of the initiator accounts of 0.04-0.18% of the weight of the vinyl chloride monomer, the total dosage of the dispersant accounts for 0.04-0.15% of the weight of the vinyl chloride monomer, the dosage of the buffering agent accounts for 0.06-0.18% of the weight of the vinyl chloride monomer, and the dosage of the matting agent accounts for 0.01-8.0% of the weight of the vinyl chloride monomer. The prepared extinction polyvinyl chloride resin is fewer in crystal spot and good in extinction effect.

Description

Technical field [0001] The invention relates to the field of organic synthesis, in particular to a method for preparing a matte polyvinyl chloride resin. Background technique [0002] Polyvinyl chloride resin (PVC resin for short) is a thermoplastic polymer compound polymerized by vinyl chloride monomer. It is an important plastic raw material. As one of the five general synthetic resins, it has low price, excellent performance, and wide application fields. It is mainly used to produce various pipes, electrical cables, films, doors and windows, artificial leather, coatings, medical products, packaging materials, etc. In recent years, polyvinyl chloride resin has developed from generalization to high-performance, specialization, engineering and specialization. With the gradual improvement of domestic and foreign consumers' requirements for the appearance of products, many applications require the appearance of PVC materials with low gloss. [0003] Matting PVC resin is a special r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/06C08F214/06C08F222/28C08F218/18C08F218/00C08F2/20
CPCC08F2/20C08F214/06C08F290/062C08F218/22
Inventor 孙熊杰万波王光军刘森陈浙夏勇
Owner HANGZHOU ELECTROCHEM GROUP
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