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Preparation method of PVB (Polyvinyl Butyral) resin powder with high comprehensive property

A comprehensive performance and resin powder technology, applied in the field of polyvinyl butyral production, can solve the problems of unsatisfactory PVB resin powder, etc., and achieve the effects of reducing resin agglomeration, good fluidity, and accelerated reaction speed

Inactive Publication Date: 2019-04-09
怀集县怀德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the unsatisfactory technical problem of PVB resin powder obtained by the traditional PVB production process, and to provide a method for preparing PVB resin powder with high comprehensive performance. The PVB resin powder produced by it has high comprehensive performance, and the preparation The method improves the uniformity of the resin powder very well, and the product has a high degree of compactness, and can obtain a packing density of 0.2-0.3g / cm 3 PVB resin

Method used

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  • Preparation method of PVB (Polyvinyl Butyral) resin powder with high comprehensive property
  • Preparation method of PVB (Polyvinyl Butyral) resin powder with high comprehensive property
  • Preparation method of PVB (Polyvinyl Butyral) resin powder with high comprehensive property

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 Shown, a kind of comprehensive performance high PVB resin powder preparation method of the present invention comprises the following steps:

[0032] (1) Dissolving: Put polyvinyl alcohol with a vinyl acetate (-COO-) content of 0.5% to 1% into a dissolution kettle for dissolution to make a polyvinyl alcohol solution;

[0033] The degree of alcoholysis of the polyvinyl alcohol is 99.0% to 99.5%, the melting temperature is 96°C and the holding time is 80min;

[0034] (2) Filtration and heat exchange: filter the polyvinyl alcohol solution dissolved in step (1) with a filter, and carry out heat exchange and filtration with a heat exchanger and pure water;

[0035] (3) Reaction: put the polyvinyl alcohol solution of step (2) into the blending kettle, and when the temperature of the polyvinyl alcohol solution is lowered to 30° C., add n-butyraldehyde to mix; Add hydrochloric acid at 25°C; the mixture of polyvinyl alcohol and n-butyraldehyde reacts with hydro...

example 1

[0041] Add a total of 125g of polyvinyl alcohol containing type A polyvinyl alcohol into 1340ml of pure water, the quality of type A polyvinyl alcohol is 1-10% of the total amount of polyvinyl alcohol, keep stirring and raise the temperature to 96°C, and keep it warm for 80min . Then, when the temperature of the solution was lowered to 30° C., n-butyraldehyde was added and stirred. When the solution is cooled to 25°C, add hydrochloric acid, the mass ratio of hydrochloric acid to total polyvinyl alcohol is 12-15:100, the mass concentration of hydrochloric acid is 40%, and the mass ratio of n-butyraldehyde to total polyvinyl alcohol is 0.6. After the reaction took place, the temperature was raised to 60° C., and then kept for 2 hours. Sodium hydroxide was added to terminate the reaction, followed by washing with water. The washed polyvinyl butyral resin is dehydrated and dried to obtain the finished polyvinyl butyral resin.

[0042] Wherein, the molecular weight of the type A...

example 2

[0044] Add a total of 125g of polyvinyl alcohol containing type A polyvinyl alcohol into 1340ml of pure water, the quality of type A polyvinyl alcohol is 10-20% of the total amount of polyvinyl alcohol, keep stirring and raise the temperature to 96°C, and keep it warm for 80min . Then, when the temperature of the solution was lowered to 30° C., n-butyraldehyde was added and stirred. When the solution is cooled to 25°C, add hydrochloric acid, the mass ratio of hydrochloric acid to total polyvinyl alcohol is 12-15:100, the mass concentration of hydrochloric acid is 40%, and the mass ratio of n-butyraldehyde to total polyvinyl alcohol is 0.6. After the reaction took place, the temperature was raised to 60° C., and then kept for 2 hours. Sodium hydroxide was added to terminate the reaction, followed by washing with water. The washed polyvinyl butyral resin is dehydrated and dried to obtain the finished polyvinyl butyral resin.

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Abstract

The invention discloses a preparation method of PVB (Polyvinyl Butyral) resin powder with high comprehensive property. The preparation method comprises the following steps of: (1) dissolving: placingpolyvinyl alcohol with the content of ethylene vinyl acetate being 0.5%-1% into a dissolving kettle for dissolving, and preparing polyvinyl alcohol solution, wherein the alcoholysis degree of the polyvinyl alcohol is 99.0%-99.5%, the melting temperature is 96 DEG C and the insulating time is 80 minutes; (2) filtering and exchanging heat; (3) reacting: placing the polyvinyl alcohol solution in thestep (2) into a blending kettle, and when the polyvinyl alcohol solution is cooled to 30 DEG C, placing n-butyraldehyde for mixing; when the mixed liquid of the polyvinyl alcohol solution and the n-butyraldehyde is cooled to 25 DEG C, placing hydrochloric acid; reacting the mixed liquid of the polyvinyl alcohol solution and the n-butyraldehyde and the hydrochloric acid in the blending kettle to generate reactants; (4) standing; (5) insulating; (6) washing with water; (7) spinning and drying to obtain the PVB resin powder. The preparation method disclosed by the invention has the beneficial effects that the uniform degree of the resin powder can be well improved, the compaction degree of a product is high, and the PVB resin with the bulk density being 0.2-0.3g / cm<3> can be obtained.

Description

technical field [0001] The invention belongs to the production technical field of polyvinyl butyral, and in particular relates to a method for preparing PVB resin powder with high comprehensive performance. Background technique [0002] In the past, people usually use solids or increase the thickness of glass to improve the sound insulation performance of glass. However, as people pay more and more attention to environmental issues, the limitations of glass design, increased thickness and hardness have certain restrictions. "Green environmental protection" has become a building and Common problems faced by car manufacturers, among which lightweight has become an important consideration in car design. [0003] The use of PVB laminated glass can not only solve the noise problem, but also solve the lightweight problem. PVB resin is an essential material for preparing laminated glass. With the development of the automobile industry, construction industry, and photovoltaic indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/28C08F116/06C08J5/18
CPCC08F8/28C08J5/18C08J2329/14C08F116/06
Inventor 叶卫民梁飞娄金楼
Owner 怀集县怀德新材料有限公司
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