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Preparation method of low-acid-value anti-degradation polyvinyl butyral

A technology of polyvinyl butyral and polyvinyl alcohol, which is applied in the field of preparation of polyvinyl butyral and achieves the effects of good acetal degree uniformity, high acetal degree and high yield

Inactive Publication Date: 2018-10-12
营口天元高分子树脂有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preparing polyvinyl butyral with low acid value and anti-degradation for the deficiency of the above-mentioned traditional synthesis method. The polyvinyl butyral can increase Insulation performance, heat resistance, and high thermal stability of the product, and no acid value, not easy to degrade

Method used

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Embodiment Construction

[0026] The embodiment given below intends to further illustrate the present invention, but can not be interpreted as the limitation of protection scope of the present invention, some non-essential improvements and adjustments that those skilled in the art make to the present invention according to the above-mentioned content of the present invention still belong to protection scope of the present invention.

[0027] The amounts of the substances used in the following implementations are all based on 100% content, which is hereby explained.

[0028] A kind of preparation method of the anti-degradation polyvinyl butyral of low acid value, it comprises the following steps:

[0029] Step 1: prepare polyvinyl alcohol emulsion;

[0030] Add 600-1000 parts by mass of dimethyl sulfoxide into the dissolution kettle, and add 52-60 parts by mass of polyvinyl alcohol while stirring at room temperature, and adopt a stepwise heating method until the temperature in the kettle reaches 30-80°...

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Abstract

The invention discloses a preparation method of low-acid-value anti-degradation polyvinyl butyral. The preparation method comprises the following steps: using polyvinyl alcohol with an alcoholysis degree of 97.0-98.0% as a raw material, dissolving the polyvinyl alcohol by using dimethyl sulfone (DMSO), carrying out a reaction with butyraldehyde at a high temperature under the catalysis of an inorganic acid, distilling out the DMSO when the temperature is reduced to a proper temperature, carrying out diluting with deionized water until the concentration of the residual DMSO in the kettle is notmore than 10%, then adding absolute ethyl alcohol, continuing carrying out reflux for 0.5-1.5 hours, then distilling out all the ethyl alcohol, remaining the residues into a granulator, carrying outextrusion moulding, and placing the obtained material in a vacuum drying oven to obtain the product. The low-acid-value anti-degradation polyvinyl butyral provided by the invention has good transparency, acetalization degree, weather resistance, water resistance and corrosion resistance, simultaneously has good stripping performance and low acid value, and can accelerate improve the compatibilitywith other organic solvents such as acetone, toluene, benzene and the like. The product has stable quality, is not easy to degrade, and is suitable for industrial production of workshops.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a preparation method of polyvinyl butyral with low acid value and anti-degradation. Background technique [0002] Polyvinyl butyral is a solvent-based resin. PVB has good film resistance, and the formed coating film has excellent characteristics such as high transparency, elasticity, toughness, acid and alkali resistance, oil resistance, windability, weather resistance and low temperature impact resistance, and PVB has a special chemical structure , so it has excellent adhesion to glass, metal, ceramic powder, plastic, leather and wood; in addition, it has good dispersibility to dyes and pigments, and has good compatibility with various resins. [0003] Polyvinyl butyral has a large proportion of hydroxyl groups, so it can send bridging reactions with some thermosetting resins to improve chemical resistance and application hardness. Due to the above-mentioned excell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F16/06C08F8/28
CPCC08F8/28C08F16/06
Inventor 陈海云
Owner 营口天元高分子树脂有限公司
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