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Process for preparing hydrolysis crosslinkable vinyl chloride / silicane copolymer resin

A silane copolymerization resin, hydrolysis and crosslinking technology, applied in the field of vinyl chloride, can solve problems such as resin processing performance deterioration, and achieve the effects of excellent heat resistance, strong controllability and high crosslinking efficiency

Inactive Publication Date: 2007-02-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] During the synthetic process of vinyl chloride / silane copolymer resin, when the aqueous phase is acidic or alkaline, the siloxane groups in the copolymer resin can be hydrolyzed and cross-linked to form partially cross-linked vinyl chloride / silane copolymer resin. The processability of the resin will deteriorate

Method used

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  • Process for preparing hydrolysis crosslinkable vinyl chloride / silicane copolymer resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 100g vinyl chloride, 0.50g methacryloxypropyltrimethoxysilane, 200g deionized water, 0.1g polyvinyl alcohol, 0.1g ethyl cellulose, 0.15g peroxydicarbonate bis(2-ethylhexyl ester) and 0.10 g of sodium hydroxide were added to the reactor, and after stirring at room temperature for 15 minutes, the temperature was raised to 57 ° C to start polymerization, and the polymerization pressure was 6.5 kg / cm 2 , lower the temperature, remove unreacted monomers, discharge, filter, and dry to obtain 84.5 g of vinyl chloride / silane copolymer resin.

Embodiment 2

[0031]100g vinyl chloride, 1.0g methacryloxypropyltrimethoxysilane, 200g deionized water, 0.1g polyvinyl alcohol, 0.1g ethyl cellulose, 0.15g peroxydicarbonate bis(2-ethylhexyl ester) and 0.20g of sodium hydroxide were added to the reactor, and after stirring at room temperature for 15min, the temperature was raised to 57°C to start polymerization, until the system pressure was 6.5kg / cm 2 , lower the temperature, remove unreacted monomers, discharge, filter, and dry to obtain 84.8g of vinyl chloride / silane copolymer resin.

Embodiment 3

[0033] 100g vinyl chloride, 2.0g methacryloxypropyl trimethoxysilane, 200g deionized water, 0.1g polyvinyl alcohol, 0.1g hydroxypropyl methylcellulose, 0.15g peroxydicarbonate di(2- Ethylhexyl ester) and 0.25g of sodium hydroxide were added to the reactor, and after stirring at room temperature for 15min, the temperature was raised to 57°C to start polymerization, until the system pressure was 6.5kg / cm 2 , lower the temperature, remove unreacted monomers, discharge, filter, and dry to obtain 85.2 g of vinyl chloride / silane copolymer resin.

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Abstract

The invention discloses a process for preparing hydrolysis crosslinkable vinyl chloride / silicane copolymer resin, which comprises charging 100 parts of chloride monomer, 0.1-10 parts of silicane monomer, 0.05-0.5 part of initiating agent, 0.05-0.5 part of dispersing agent, 0.1-1.0 part of pH conditioning agent, 140-250 parts of deionized water into polymerization still, agitating, elevating the temperature to 45-70 deg. C for suspension polymerization at constant temperature, removing unreacted monomer, discharging, filtering, drying to obtain 70-90 parts of vinyl chloride / silicane copolymerized resin.

Description

technical field [0001] The invention relates to vinyl chloride, in particular to a preparation method of hydrolyzable cross-linked vinyl chloride / silane copolymer resin. Background technique [0002] Polyvinyl chloride (PVC) has the advantages of good dielectric properties, chemical corrosion resistance, flame retardancy, good comprehensive mechanical properties, etc., and is widely used. However, PVC also has some performance defects. For example, the heat distortion temperature of rigid PVC is low, only about 80°C. When the use temperature exceeds the heat distortion temperature, it is easy to deform, and the hardness, modulus and tensile strength are greatly reduced; PVC has viscoelastic properties similar to cross-linked rubber, but compared with cross-linked rubber, its elasticity is poorer, and when the use temperature rises, the physical cross-linking effect gradually loses, it is easy to viscous flow under load, and its dimensional stability is poor. [0003] Crossl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/06
Inventor 包永忠黄志明翁志学
Owner ZHEJIANG UNIV