Continuous preparation method for catalytically synthesizing polyvinyl butyral resin through organic acid

The technology of polyvinyl butyral resin and polyvinyl alcohol is applied in the field of continuous preparation of organic acid catalyzed synthesis of polyvinyl butyral resin, and achieves the effects of uniform particles, high acetal degree and good product quality

Inactive Publication Date: 2015-10-28
SICHUAN DONGFANG INSULATING MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention aims at the problem that in the existing heterogeneous synthesis process of polyvinyl butyral resin, the mixing effect of PVA and n-butyraldehyde cannot be effectively combined, the effective control of reaction rate and the continuous prepara

Method used

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  • Continuous preparation method for catalytically synthesizing polyvinyl butyral resin through organic acid
  • Continuous preparation method for catalytically synthesizing polyvinyl butyral resin through organic acid
  • Continuous preparation method for catalytically synthesizing polyvinyl butyral resin through organic acid

Examples

Experimental program
Comparison scheme
Effect test

Example

[0034] Examples 1-8:

[0035] The continuous preparation method of organic acid catalyzed synthesis of polyvinyl butyral resin, the steps are:

[0036] a. Preparation of polyvinyl alcohol-n-butyraldehyde water emulsion:

[0037] Add 565~1900 parts by mass of water into the dissolving kettle, add 100 parts by mass of polyvinyl alcohol under stirring, keep it at 60℃±2℃ for 0.5h, heat up to 95℃±2℃ and keep it for 2h to make polyvinyl alcohol Dissolve completely, and filter at 40℃~60℃ to obtain 665~2000 mass parts of polyvinyl alcohol aqueous solution. Then the obtained polyvinyl alcohol aqueous solution and the filtered 55~80 mass parts of n-butyraldehyde are heated at 30℃~50℃ Next, it is stirred by an emulsifier for 20min-60min, so that the polyvinyl alcohol and n-butyraldehyde are fully mixed to prepare 720-2080 parts by mass of polyvinyl alcohol-n-butyraldehyde aqueous emulsion;

[0038] b. Preparation of polyvinyl butyral resin:

[0039] The 500 parts by mass of the polyvinyl alcohol...

Example Embodiment

[0050] Example 9:

[0051] The continuous preparation method of organic acid catalyzed synthesis of polyvinyl butyral resin, the steps are:

[0052] a. Preparation of polyvinyl alcohol-n-butyraldehyde water emulsion:

[0053] Add 565 parts by mass of water into the dissolving kettle, add 100 parts by mass of polyvinyl alcohol under stirring, keep at a temperature of 58°C for 0.5h, heat up to 93°C and keep for 2h (to completely dissolve the polyvinyl alcohol), and cool to Filter at 40°C to obtain an aqueous solution of polyvinyl alcohol. Then, the aqueous solution of polyvinyl alcohol and 55 parts by mass of n-butyraldehyde are stirred by an emulsifier at a temperature of 30°C for 20min-60min so that polyvinyl alcohol and n-butyraldehyde are fully mixed to obtain polyethylene Alcohol-n-butyraldehyde water emulsion;

[0054] b. Preparation of polyvinyl butyral resin:

[0055] Take 500 parts by mass of the polyvinyl alcohol-n-butyraldehyde aqueous emulsion prepared above and 100 parts by...

Example Embodiment

[0057] Example 10:

[0058] The continuous preparation method of organic acid catalyzed synthesis of polyvinyl butyral resin, the steps are:

[0059] a. Preparation of polyvinyl alcohol-n-butyraldehyde water emulsion:

[0060] Add 1900 parts by mass of water to the dissolving kettle, add 100 parts by mass of polyvinyl alcohol under stirring, keep the temperature at 62°C for 0.5h, heat up to 97°C and keep it for 2h (to completely dissolve the polyvinyl alcohol), and cool to Filter at 60°C to obtain an aqueous solution of polyvinyl alcohol. Then, the aqueous solution of polyvinyl alcohol and 80 parts by mass of n-butyraldehyde are stirred by an emulsifier at a temperature of 50°C for 60 minutes to fully mix the polyvinyl alcohol and n-butyraldehyde to obtain polyvinyl alcohol- N-butyraldehyde water emulsion;

[0061] b. Preparation of polyvinyl butyral resin:

[0062] Take 500 parts by mass of the above-prepared polyvinyl alcohol-n-butyraldehyde aqueous emulsion and (prepared, preferabl...

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Abstract

The invention discloses a continuous preparation method for catalytically synthesizing polyvinyl butyral resin through organic acid. The continuous preparation method is characterized in that by mass, 500 parts of polyvinyl alcohol-n-butyl aldehyde aqueous emulsion is prepared and continuously and simultaneously put into a high-shear mixer with 100 parts of 2.5% organic acid aqueous emulsion, and the polyvinyl alcohol-n-butyl aldehyde aqueous emulsion and the 2.5% organic acid aqueous emulsion are mixed and react for 10 min-20 min at shearing rate of 50S-1-150S-1 with the shear force 50 Pa-150 Pa at 30 DEG C-40 DEG C, then are sent to an aging kettle and sequentially processed through first-stage reaction at 39-41 DEG C for 3-4 h and second-stage reaction at 59-61 DEG C for 2-3 h to complete the polymerization process; mother liquid is removed through a centrifugal machine, solid substances are processed through water washing, alkali washing, water washing and drying, and then the powder polyvinyl butyral resin is prepared. The continuous preparation method is continuous in preparation, high in efficiency, low in energy consumption and stable in product quality; the prepared polyvinyl butyral resin is suitable for the fields of photovoltaicpackaging materials, architectural safety glass, safety glass for cars and the like.

Description

technical field [0001] The invention belongs to the preparation of organic macromolecular compounds, and relates to a continuous preparation method for synthesizing polyvinyl butyral resin by organic acid catalysis. The polyvinyl butyral resin product produced by the invention is suitable for the fields of safety glass for automobiles, photovoltaic encapsulation materials, safety glass for buildings, inks, paints, adhesives and the like. Background technique [0002] Polyvinyl butyral (PVB for short) is obtained by acetalization reaction of polyvinyl alcohol (PVA for short) and n-butyraldehyde (BA for short) under acid catalysis. Due to the good flexibility of PVB molecules, PVB resin has good film-forming properties, mechanical properties, optical properties, insulation, solubility, etc., and is widely used in automotive safety glass, photovoltaic packaging materials, architectural safety glass, inks, coatings , Adhesives and other fields. [0003] The synthesis process o...

Claims

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Application Information

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IPC IPC(8): C08F8/28C08F16/06
Inventor 刘明徐康林陈小强廖曦唐安斌
Owner SICHUAN DONGFANG INSULATING MATERIAL
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