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Preparation method of thin-skinned porous polyvinyl chloride resin

A technology of polyvinyl chloride resin and thin skin, which is applied in the field of preparation of characteristic polyvinyl chloride resin, can solve the problems of easy discoloration and deterioration of thermal stability of products, and achieve high promotion and application value and high economic benefits

Inactive Publication Date: 2012-12-26
XINJIANG TIANYE GRP +1
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AI Technical Summary

Problems solved by technology

The presence of this kind of peroxide in polyvinyl chloride will significantly deteriorate its thermal stability and the product will easily change color.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] In this example, a thin-skinned porous polyvinyl chloride resin is prepared by using a quaternary composite dispersant-based polymerization formula system; the quaternary composite dispersant is composed of polyvinyl acetate main dispersant, nonionic tackifier, anion and nonionic with different HLB values based on surfactants and fatty acids. .

[0013] Another embodiment differs in that a lipophilic dispersant and a surfactant are added to the polymeric formulation system.

[0014] Another example differs in that a deoxygenated soft water feed with an oxygen content of 0.05 mg / L is used.

[0015] Another example differs in that deoxygenated soft water feed with an oxygen content of 0.03 mg / L is used.

[0016] The difference in another embodiment is that the feeding method of low-temperature deoxidized soft water is adopted. The quaternary composite dispersant is fully mixed with low-temperature deoxygenated soft water first, then the monomer is added, and then high...

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Abstract

The invention relates to a preparation method of thin-skinned porous polyvinyl chloride resin. The thin-skinned porous polyvinyl chloride resin is prepared by adopting a polymeric formula system which mainly uses a four-component composite dispersing agent. The four-component composite dispersing agent is based on polyvinyl acetate main dispersing agent, non-ionic tackifier, different-HLB (hydrophile lipophile balance) anion, non-ionic surfactant and fatty acid. By improving soft water for polymerization, the formula of the dispersing agent, the polymerization production process and the like, high-quality, thin-skinned, porous and high-whiteness polyvinyl chloride resin with enterprise features and the preparation method thereof are developed, the economic benefits and the popularization and application values are higher, and the thin-skinned, porous and high-whiteness polyvinyl chloride resin is suitable for the engineering field.

Description

technical field [0001] The invention relates to a preparation method of characteristic polyvinyl chloride resin, which is especially suitable for the preparation method of thin-skinned porous polyvinyl chloride resin. Background technique [0002] my country is a big PVC resin production country. In 2010, the production capacity reached 20.69 million tons, ranking first in the world. Among them, the suspension method PVC resin accounts for about 80% of the total production capacity. Porous and thin-skinned PVC resin has small primary particles and low aggregation. High porosity, easy plasticizing processing, easy monomer desorption and other excellent properties, it is widely used in the preparation of chlorinated polyvinyl chloride (CPVC) resin and other aspects. The total domestic production capacity is about 20,000 tons / year, and there is a big gap with foreign products in terms of processability, thermal stability and mechanical properties. It can only be used for low-e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F14/06C08F2/20C08F2/18
Inventor 吴彬唐红建刘中海尹建平王明杰陆俊
Owner XINJIANG TIANYE GRP
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