Preparation method of extinction polyvinyl chloride resin

The technology of polyvinyl chloride resin and matte polyvinyl chloride is applied in the field of preparation of matt polyvinyl chloride resin, which can solve the problems such as the quantity or size of gel is not easy to be plasticized, the appearance of products is affected, the degradation of film products, etc., and the matting effect is good. , Improve the effect of uniformity and particle regularity

Active Publication Date: 2016-09-28
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 methylcellulose) and 130g matting agent (polyethylene glycol dimethacrylate) as reaction raw materials. Among them, the polyvinyl alcohol is selected to be a composite of polyvinyl alcohol with a high degree of alcoholysis of 82% and a polyvinyl alcohol with a low degree of alcoholysis of 50%. The viscosity of the hydroxypropyl methylcellulose is 40 mPa·s, the methoxyl content is 29%, and the hydroxypropyl content is 6%.

[0023] Take 1g of polyvinyl alcohol and 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 50rpm To carry out pre-emulsification, the polyethylene glycol dimethacrylate after the pre-emulsification treatment...

Embodiment 2

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

[0027] Get 0.5g hydroxypropyl methylcellulose and carry out pre-emulsification treatment to 150g polyethylene glycol dimethacrylate: mix hydroxypropyl methylcellulose and polyethylene glycol dimethacrylate at room temperature to form a mixed solution, Stir the mixed solution at a rotational speed of 80 rpm to perform pre-emulsification, and the polyethy...

Embodiment 3

[0030] With 6kg vinyl chloride monomer, 10kg deionized water, 8.5g initiator (tert-butyl peroxyneodecanoate), 3.6g buffer (sodium bicarbonate), 8.8g dispersant (5.2g polyvinyl alcohol, 3.6g Hydroxypropyl methylcellulose) and 120g matting agent (diallyl maleate) as reaction raw materials. Among them, polyvinyl alcohol is selected to be a composite of polyvinyl alcohol with a moderate degree of alcoholysis of 75% and a low degree of alcoholysis of polyvinyl alcohol with a degree of alcoholysis of 40%. The viscosity of the hydroxypropyl methylcellulose is 55 mPa·s, the methoxyl content is 28%, and the hydroxypropyl content is 8%.

[0031] Get 0.2g polyvinyl alcohol, 0.6g hydroxypropyl methylcellulose and carry out pre-emulsification treatment to 120g diallyl maleate: mix polyvinyl alcohol, hydroxypropyl methylcellulose and maleic acid diene at room temperature The propyl ester forms a mixed solution, and the mixed solution is stirred at a rotational speed of 100 rpm for pre-emul...

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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 preparation method of matting polyvinyl chloride resin. Background technique [0002] Polyvinyl chloride resin (referred to as PVC resin) is a thermoplastic polymer compound polymerized from vinyl chloride monomer. It is an important plastic raw material. As one of the five general-purpose 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 product appearance, many applications require the appearance of PVC materials to have low gloss. [0003] Matte PVC resin ...

Claims

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Application Information

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Patent Type & Authority Applications(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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