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Chlorinated polyvinyl chloride resin and preparation method and application

A technology of chlorinated polyvinyl chloride and polyvinyl chloride resin, applied in the field of resin, can solve the problems of poor processing fluidity, poor heat resistance, complex synthesis process equipment, etc., and achieve good heat resistance stability and good processing fluidity , Reduce the effect of chain scission degradation

Inactive Publication Date: 2014-12-24
SHANGHAI CHLOR ALKALI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to overcome the existing chlorinated polyvinyl chloride resin in the process of processing CPVC boards with poor processing fluidity, poor heat resistance, and the defects of complicated photoinitiated synthesis process equipment by the aqueous phase suspension method, providing A kind of chlorinated polyvinyl chloride resin and its preparation method and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) at 7m 3 In the enamel reaction kettle, add 500kg of loose PVC resin with a polymerization degree of 700 (specific surface area 8m 2 / g) and 4500kg deionized water, adding different types of initiators, namely (a) 0.5kg lauroyl peroxide, (b) 0.5kg benzoyl peroxide, (c) 0.25kg lauroyl peroxide and 0.25 The composite initiator of kg benzoyl peroxide, then add 25kg molar degree of alcoholysis and be the polyvinyl alcohol aqueous solution (massfraction is 10%) of 78%;

[0042] (2) Control the temperature at 50-60°C, with 10m 3 / h flow into the nitrogen for 15 minutes, while controlling the temperature 80 ~ 90 ℃, turn off the nitrogen;

[0043] (3) at 16m 3 Inject chlorine gas at a flow rate of / h for 30 minutes, maintain the reaction temperature at 90-95°C, and close the tail gas valve;

[0044] (4) Adjust the flow of chlorine gas to 15m 3 / h, maintain the reaction temperature at 95-100°C, the reaction pressure at 0.05-0.15MPa, and the chlorine passage time for 60mi...

Embodiment 2

[0052] (1) at 7m 3 In the enamel reaction kettle, add 1000kg of loose PVC resin with a polymerization degree of 600 (specific surface area 6.5m 2 / g) and 4000kg mass concentration of 15% hydrochloric acid, add different types of initiators, namely (a) 5kg lauroyl peroxide, (b) 5kg benzoyl peroxide, (c) 4kg lauroyl peroxide and The composite initiator of 1kg benzoyl peroxide, then add 100kg molar alcoholysis degree and be the polyvinyl alcohol aqueous solution (mass fraction is 10%) of 78%;

[0053] (2) Control the temperature at 50-60°C, at 25m 3 / h flow into the nitrogen for 15 minutes, while controlling the temperature 80 ~ 90 ℃, turn off the nitrogen;

[0054] (3) at 33m 3 Inject chlorine gas at a flow rate of / h for 25 minutes, maintain the reaction temperature at 90-95°C, and close the tail gas valve;

[0055] (4) Adjust the flow of chlorine gas to 25m 3 / h, maintain the reaction temperature at 95-100°C, the reaction pressure at 0.05-0.15MPa, and the chlorine passage...

Embodiment 3

[0063] (1) at 7m 3 In the enamel reaction kettle, add 1500kg of loose PVC resin with a polymerization degree of 500 (specific surface area 5m 2 / g) and 3500kg of hydrochloric acid with a mass concentration of 5%, adding different types of initiators, namely (a) 15kg lauroyl peroxide, (b) 15kg benzoyl peroxide, (c) 5kg lauroyl peroxide and 10kg of compound initiator of benzoyl peroxide, then add 100kg of silica sol solution (mass fraction is 30%);

[0064] (2) Control the temperature at 50-60°C, with 40m 3 / h flow into the nitrogen for 20 minutes, while controlling the temperature 80 ~ 90 ℃, turn off the nitrogen;

[0065] (3) at 40m 3 Inject chlorine gas at a flow rate of / h for 30 minutes, maintain the reaction temperature at 90-95°C, and close the tail gas valve;

[0066] (4) Adjust the flow of chlorine gas to 35m 3 / h, maintain the reaction temperature at 95-100°C, the reaction pressure at 0.05-0.15MPa, and the chlorine passage time for 60min;

[0067] (5) Adjust the ...

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Abstract

The invention discloses a chlorinated polyvinyl chloride resin and its preparation method and application. The preparation method comprises the following steps: in an oxygen-free atmosphere, chlorine is introduced, at the speed of 20-40m<3>.h<-1>.(1000kg polyvinyl chloride resin)<-1>, into a mixed system of polyvinyl chloride resin, an initiator and a dispersant and water or hydrochloric acid; the speed of introducing chlorine is adjusted to 20-32m<3>.h<-1>.(1000kg polyvinyl chloride resin)<-1>, 30-50 m<3>.h<-1>.(1000kg polyvinyl chloride resin)<-1> and 20-32 m<3>.h<-1>.(1000kg polyvinyl chloride resin)<-1> respectively; and introduction of chlorine is stopped, and a reaction continues. The total amount of introduced chlorine during the above steps meets the following requirement: chlorine content of the chlorinated polyvinyl chloride resin reaches 63.5-65.5 wt%. The chlorinated polyvinyl chloride resin provided by the invention is easy to plastify and has good processing fluidity and heat-resistant stability.

Description

technical field [0001] The invention relates to the field of resins, in particular to a chlorinated polyvinyl chloride resin and a preparation method and application thereof. Background technique [0002] Chlorinated polyvinyl chloride (CPVC) resin is the product of further chlorination of polyvinyl chloride (PVC). CPVC plastic has excellent physical and chemical properties such as heat resistance, weather resistance, chemical medium corrosion resistance, bacterial pollution resistance, and flame retardancy. In recent years, it is a novel plastic material that has developed rapidly in the application field. [0003] The production methods of CPVC mainly include solvent method, liquid chlorine method, gas-solid phase method and aqueous phase suspension method. [0004] The solvent method was the main production method used in my country in the past few years, but due to the restrictions on the use of toxic solvents such as carbon tetrachloride and chlorobenzene in the Montre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F14/06C08F8/22C08L27/24
Inventor 张建陈斌武缈晖马斌全蔡华明
Owner SHANGHAI CHLOR ALKALI CHEM
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