Method for producing polyvinyl chloride special for high-impact-resisting building material product

The technology of a polyvinyl chloride resin and a production method is applied in the field of preparation of graft copolymers, which can solve the problems such as the inability to apply PVC building materials, and achieve the effects of light sticking, regular particle shape, and few fine particles.

Active Publication Date: 2007-12-12
SHANGHAI CHLOR ALKALI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because its products are PVC paste resins, they cannot be used in the fields of PVC building materials such as profiles, pipes, and plates.

Method used

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  • Method for producing polyvinyl chloride special for high-impact-resisting building material product
  • Method for producing polyvinyl chloride special for high-impact-resisting building material product
  • Method for producing polyvinyl chloride special for high-impact-resisting building material product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Step 1: Synthesis of Polyacrylate Composite Latex Particles:

[0064] Introduce high-purity nitrogen into a 1L four-necked flask equipped with electric speed-adjustable stirring, reflux condenser, and electric heating bowl to exhaust oxygen, add 380ml of deionized water and 0.24g of sodium lauryl sulfate under the continuous protection of nitrogen, and start stirring 200rpm to raise the temperature to 85°C; at this temperature, add pre-configured butyl acrylate (BA) / crosslinking agent diallyl maleate (DAM) / sodium lauryl sulfate (SLS)=192g / 1.92g / 0.72g) of the pre-emulsion 40ml, add potassium persulfate 0.50g, temperature control reaction for 1 hour, continuously drop the remaining BA pre-emulsion and KPS solution 1.92g (4% concentration), react for 2-3 hours, the nuclear partial polymerization is completed ;

[0065] Cool down and add 48g methyl methacrylate monomer (BA / MMA feeding ratio 80 / 20) to stir and swell for 0.5 hours, add 0.48g (4% concentration) of sodium lau...

Embodiment 2

[0072] In the first step, when the polyacrylate composite latex particles are synthesized, 144g of butyl acrylate is fed, 96g of methyl methacrylate is fed, and the ratio of feeding is 60 / 40. Other processes are implemented with 1. (See Table 1 for the results)

Embodiment 3

[0074] In the first step, when polyacrylate composite latex particles are synthesized, 168g of butyl acrylate is fed, 72g of methyl methacrylate is fed, and the ratio of charging is 70 / 30. Other processes are implemented with 1. (See Table 1 for the results)

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Abstract

The present invention discloses the production process of polyvinyl chloride resin specially for high antishock building material product. Composite polyacrylate latex grain is first prepared through multiple-step emulsion polymerization, then pH regulated to neutrality and grafting polymerized with vinyl chloride suspension to prepare vinyl chloride grafted acrylate copolymer. The copolymer may be used widely in specially shaped material, pipe, plate and other plastic building material with antishock performance requirement.

Description

technical field [0001] The invention relates to a preparation method of polyvinyl chloride copolymer resin, in particular to a preparation method of a graft copolymer of polyacrylate and vinyl chloride graft suspension polymerization. Background technique [0002] To improve the impact resistance of polyvinyl chloride resin (PVC) products, two methods can be adopted: blending and copolymerization. Blending modification is to add a toughening agent during PVC processing to improve the impact strength of products; copolymerization modification uses grafting , crosslinking and other methods to achieve the purpose of improving the impact strength of the product. [0003] Copolymerization modification can connect polyvinyl chloride and toughening agent with chemical bonds, and the graft copolymer acts as a solubilizer, which improves compatibility, better toughening effect, aging resistance of the material, and higher processing performance. The impact resistance of PVC resin is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F265/06C08F2/16C08F4/04C08F4/32
Inventor 缪晖袁茂全周大民刘松涛沈青
Owner SHANGHAI CHLOR ALKALI CHEM
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