Preparation method of high polymerization degree delustering polyvinyl chloride resin

A technology of polyvinyl chloride resin and high degree of polymerization, which is applied in the preparation of polyvinyl chloride resin and the field of preparation of high degree of polymerization matting polyvinyl chloride resin, which can solve the problems of insufficient matting effect, increased cost, and decreased mechanical properties. Achieve good matting effect and solve the effect of rising costs

Active Publication Date: 2017-09-22
HANGZHOU ELECTROCHEM GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the defects of this method, when plastic processing plants produce high-polymerization matting plastic products, the cost increases, the matting effect is not sufficient, the mechanical properties are reduced, and the on-site environment is poor.

Method used

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  • Preparation method of high polymerization degree delustering polyvinyl chloride resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 4g of ammonium bicarbonate, 10kg of non-ionized water, 6kg of vinyl chloride monomer, 18g of PVA, 9g of HPMC, 22g of CNP initiator, 58g of polyethylene glycol dimethacrylate and other materials were added to a 20 liter polymerizer. After cold stirring for 5 to 10 minutes, the temperature was raised to a reaction temperature of 38°C. After the polymerization reaction pressure is reduced by 0.15MPa, the polymerization reaction is terminated, the monomer is recovered under self-pressure, and the material is discharged. After steam stripping, degassing, centrifugal dehydration, and drying, the finished product of high polymerization degree matting resin can be obtained.

[0032] The PVA in this example is 82% polyvinyl alcohol with high alcoholysis degree, and the HPMC is hydroxypropyl methylcellulose with a viscosity of 40 mPa·s, a methoxy content of 29%, and a hydroxypropyl content of 6%. .

Embodiment 2

[0034] 3.6g of sodium bicarbonate, 10kg of non-ionized water, 6kg of vinyl chloride monomer, 18g of PVA1, 15g of PVA2, 22g of CNP initiator, 45g of triallyl cyanurate and other materials were added to a 20 liter polymerization vessel. After cold stirring for 5 to 10 minutes, the temperature was raised to a reaction temperature of 38°C. When the conversion rate is 40%, 20 g of polyethylene glycol dimethacrylate is added. After the polymerization reaction pressure is reduced by 0.15 MPa, the polymerization reaction is terminated, the monomer is recovered under self-pressure, and the material is discharged. After steam stripping, degassing, centrifugal dehydration, and drying, the finished product of high polymerization degree matting resin can be obtained.

[0035] In this example, PVA1 is polyvinyl alcohol with a high degree of alcoholysis of 80%, and PVA2 is polyvinyl alcohol with a degree of medium alcoholysis of 70%.

Embodiment 3

[0037] 4g of ammonium bicarbonate, 10kg of non-ionized water, 6kg of vinyl chloride monomer, 16g of PVA, 8g of HPMC, 19g of CNP initiator, 58g of polyethylene glycol dimethacrylate and other materials were added to a 20 liter polymerizer. After cold stirring for 5-10 minutes, the temperature was raised to a reaction temperature of 40°C. After the polymerization reaction pressure is reduced by 0.1MPa, the polymerization reaction is terminated, the monomer is recovered under self-pressure, and the material is discharged. After steam stripping, degassing, centrifugal dehydration, and drying, the finished product of high polymerization degree matting resin can be obtained.

[0038] The PVA in this example is 82% polyvinyl alcohol with high alcoholysis degree, and the HPMC is hydroxypropyl methylcellulose with a viscosity of 40 mPa·s, a methoxy content of 29%, and a hydroxypropyl content of 6%. .

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Abstract

The invention provides a preparation method of high polymerization degree delustering polyvinyl chloride resin. The method includes: adding deionized water, an initiator, a dispersant, a buffering agent, a vinyl chloride monomer, a crosslinking agent and other materials into a polymerization kettle, and carrying out polymerization reaction at a suitable temperature to obtain the high polymerization degree delustering resin with delustering effect. The crosslinking agent is a monomer containing two or more reaction activity functional group structures. The crosslinking agent is added before the polymerization reaction or when the conversion rate is 0.5%-50%, or by a combined way of the two. At an appropriate temperature, the prepared high polymerization degree delustering polyvinyl chloride resin has the characteristics of neat particles, loose structure and good delustering effect. While acquiring a high polymerization degree with an average polymerization degree up to 1700 or more, the product also has good delustering effect, and is suitable for processing high polymerization degree delustering plastic products.

Description

Technical field [0001] The invention belongs to the field of organic synthesis, and relates to a preparation method of polyvinyl chloride resin, in particular to a preparation method of high polymerization degree matting polyvinyl chloride resin. Background technique [0002] Polyvinyl chloride (PVC) resin is one of the five general plastics and is widely used in industry, agriculture, construction and other fields. Polyvinyl chloride (PVC) resins are divided into general-purpose polyvinyl chloride resins and high-polymerization degree polyvinyl chloride resins. General-purpose polyvinyl chloride resins have some defects, which cannot be adapted to high-end and special processing applications. Vinyl resin (usually refers to a polyvinyl chloride resin with an average degree of polymerization above 1700 or a slightly cross-linked structure between the molecules) improves the processing performance of general-purpose polyvinyl chloride resins, and is more suitable for processing ult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F214/06C08F220/34C08L27/06C08L51/08
CPCC08F214/06C08F283/065C08L27/06C08L51/08C08F220/34
Inventor 万波孙熊杰王光军周杰刘森葛晴
Owner HANGZHOU ELECTROCHEM GROUP
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