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Continuous preparation method of polyvinyl butyral resin

A technology of polyvinyl butyral resin and polyvinyl alcohol, which is applied in the field of preparation of polymer compounds, can solve the problems of insufficient mixing of raw materials, unstable product batches, uneven particles, etc., and achieves batch stability and prevention. The effect of particle agglomeration and agglomeration, particle uniformity

Active Publication Date: 2016-08-24
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art. In the existing continuous production process of polyvinyl butyral resin, it is easy to produce agglomeration, uneven particles and unstable product batches due to insufficient mixing of raw materials. The problem is to provide a continuous preparation method of polyvinyl butyral resin with fully mixed raw materials, uniform particles, stable reaction, stable product batches and good product quality

Method used

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  • Continuous preparation method of polyvinyl butyral resin
  • Continuous preparation method of polyvinyl butyral resin
  • Continuous preparation method of polyvinyl butyral resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8

[0038] The basic reaction synthesis process of the continuous preparation method of a kind of polyvinyl butyral resin of embodiment 1~8:

[0039] 1. Preparation of polyvinyl alcohol / water / butyraldehyde emulsion:

[0040] Add 100 parts by mass of polyvinyl alcohol and 400-1900 parts by mass of water into the dissolution kettle, stir and heat to 95°C ± 2°C, keep warm for 2 hours to completely dissolve the polyvinyl alcohol, cool down to 30°C-60°C and filter to obtain 500 ~2000 parts by mass of polyvinyl alcohol / water solution, and then put the obtained polyvinyl alcohol / water solution and 55~100 parts by mass of butyraldehyde that has been filtered into the emulsifier, and stir at 20°C~60°C for 0.5h~1.5h 555-2100 parts by mass of polyvinyl alcohol / water / butyraldehyde emulsion are prepared.

[0041] 2. Preparation of polyvinyl butyral resin:

[0042] 555-2100 parts by mass of polyvinyl alcohol / water / butyraldehyde emulsion and 111-420 parts by mass of inorganic acid catalyst obt...

Embodiment 9

[0053] A kind of continuous preparation method of polyvinyl butyral resin, the steps are:

[0054] a. Preparation of polyvinyl alcohol / water / butyraldehyde emulsion:

[0055] Add 100 parts by mass of polyvinyl alcohol and 1150 parts by mass of water into the dissolution kettle, stir and heat to 95°C ± 2°C, keep warm for 2 hours to completely dissolve the polyvinyl alcohol, cool down to 45°C and filter to obtain 1250 parts by mass of polyethylene Alcohol / water solution, and then the obtained polyvinyl alcohol / water solution and (filtered) 77.5 parts by mass of butyraldehyde were mixed and stirred by an emulsifier at 20°C to 60°C for 0.75h to obtain 1327.5 parts by mass of polyvinyl alcohol / water / butyraldehyde emulsion;

[0056] The polyvinyl alcohol is polyvinyl alcohol with a degree of alcoholysis of 80% to 99% and a degree of polymerization of 400 to 3000;

[0057] Described water can be pure water, distilled water or deionized water;

[0058] The emulsifier is a high-spe...

Embodiment 10

[0064] A kind of continuous preparation method of polyvinyl butyral resin, the steps are:

[0065] a. Preparation of polyvinyl alcohol / water / butyraldehyde emulsion:

[0066] Add 100 parts by mass of polyvinyl alcohol and 400 parts by mass of water into the dissolution kettle, stir and heat to 95°C ± 2°C, keep warm for 2 hours to completely dissolve the polyvinyl alcohol, cool down to 30°C and filter to obtain 500 parts by mass of polyethylene Alcohol / water solution, and then the obtained polyvinyl alcohol / water solution and (filtered) 55 parts by mass of butyraldehyde were mixed and stirred by an emulsifier at 20°C for 1 hour to obtain 555 parts by mass of polyvinyl alcohol / water / butyraldehyde emulsion ;

[0067] The polyvinyl alcohol is polyvinyl alcohol with a degree of alcoholysis of 80% to 99% and a degree of polymerization of 400 to 3000;

[0068] Described water can be pure water, distilled water or deionized water;

[0069] The emulsifier is a high-speed dispersion e...

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Abstract

The invention discloses a continuous preparation method of polyvinyl butyral resin, which is characterized in that: 555-2100 mass parts of polyvinyl alcohol / water / butyraldehyde emulsion is firstly prepared, and then mixed with 111-420 mass parts of inorganic acid catalyst At the same time, put it into the high shear mixer continuously, at 20℃~60℃, 20S ‑1 ~200S ‑1 Mix and react under the conditions of shear rate and 20Pa~200Pa shear force for 0.5min~5min, then send to the aging tank, and then pass through the first section at 40℃~45℃ for 3h, the second section at 55℃ for 2~ 3h, 2-3h reaction at 60°C in the third stage to complete the polymerization process; then the mother liquor is removed by centrifuge, washed with water, alkali, washed with water and dried to obtain powdery polyvinyl butyral resin. The polyvinyl butyral resin prepared by the invention is mainly used in the fields of photovoltaic packaging materials, architectural safety glass, automotive safety glass and the like.

Description

technical field [0001] The invention belongs to the preparation of polymer compounds, and relates to a continuous preparation method of polyvinyl butyral resin. The polyvinyl butyral resin prepared by the invention is mainly used in the fields of photovoltaic packaging materials, architectural safety glass, automotive safety glass and the like. Background technique [0002] Polyvinyl butyral (PVB) resin can be widely used in paints, adhesives, inks, resin modifiers, photovoltaic packaging materials, and safety glass due to different indicators such as butyral groups and hydroxyl content. film and other fields. The traditional synthesis process of PVB resin is divided into homogeneous method and heterogeneous method. The homogeneous method usually uses polyvinyl acetate (PVAc for short) as the starting material, alcoholysis and acetalization reactions are carried out at the same time, and then the finished product is obtained through steps such as precipitation, washing, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F16/06C08F8/28C08F6/12
Inventor 刘明唐安斌徐康林陈小强廖曦
Owner SICHUAN DONGFANG INSULATING MATERIAL
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