Low-viscosity polyvinyl butyral resin as well as preparation method and application thereof

A technology of polyvinyl butyral resin and polyvinyl alcohol, which is applied to the preparation of low-viscosity polyvinyl butyral PVB resin, preparation, and the field of polyvinyl butyral PVB resin, can solve the problem of low production efficiency and easy Discoloration, low degree of acetalization and other problems, to achieve the effect of improving production efficiency

Inactive Publication Date: 2015-06-10
东莞市龙怡阻燃材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the above-mentioned prior art, the invention provides a kind of preparation method of low-viscosity polyvinyl butyral PVB resin, solves low-viscosity polyvinyl butyral PVB resin production efficiency is low, acetalization degree partial Low, coating film is not bright, easy to change color and other problems
Low-temperature reaction (0-5°C), which solves the problems of low viscosity polyvinyl butyral PVB resin with low acetalization degree, dull coating film and easy discoloration

Method used

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  • Low-viscosity polyvinyl butyral resin as well as preparation method and application thereof
  • Low-viscosity polyvinyl butyral resin as well as preparation method and application thereof
  • Low-viscosity polyvinyl butyral resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A low-viscosity polyvinyl butyral PVB resin is prepared from polyvinyl alcohol PVA, n-butyraldehyde, degradation agent, pH regulator, antioxidant, emulsifier and acid catalyst through acetal reaction.

[0061] The concentration of the PVA aqueous solution is 8%.

[0062] The raw materials used in the method consist of:

[0063]

[0064] The rest is polyvinyl alcohol.

[0065] The method for preparing low-viscosity polyvinyl butyral resin may further comprise the steps:

[0066] (1) Fully dissolve 15kg of PVA in deionized water at 90-98°C to obtain a PVA aqueous solution with a concentration of 8%;

[0067] (2) Add 0.13kg of sodium hydroxide to the solution obtained in step (1), adjust the pH value of the solution at 9-11, then add 0.80kg of sodium hypochlorite and 0.0027kg of accelerator to fully degrade PVA;

[0068] (3) After adjusting the temperature of the solution obtained in step (2) to 30-40°C, add 0.027kg of sodium lauryl sulfate;

[0069] (4) After adjus...

Embodiment 2

[0073] A low-viscosity polyvinyl butyral PVB resin is prepared from polyvinyl alcohol PVA, n-butyraldehyde, degradation agent, pH regulator, antioxidant, emulsifier and acid catalyst through acetal reaction.

[0074] The concentration of the PVA aqueous solution is 10%.

[0075] The raw materials used in the method consist of:

[0076]

[0077] The rest is polyvinyl alcohol.

[0078] The method for preparing low-viscosity polyvinyl butyral resin may further comprise the steps:

[0079] (1) Fully dissolve 15kg of PVA in deionized water at 90-98°C to obtain a 10% PVA aqueous solution;

[0080] (2) Add 0.18kg sodium hydroxide to the solution obtained in step (1), adjust the pH value of the solution at 9-11, then add 1.19kg sodium hypochlorite and 0.0027kg accelerator to fully degrade PVA;

[0081] (3) After adjusting the temperature of the solution obtained in step (2) to 30-40°C, add 0.0299kg of sodium dodecyl sulfate;

[0082] (4) After adjusting the temperature of the s...

Embodiment 3

[0086] A low-viscosity polyvinyl butyral PVB resin is prepared from polyvinyl alcohol PVA, n-butyraldehyde, degradation agent, pH regulator, antioxidant, emulsifier and acid catalyst through acetal reaction.

[0087] The concentration of the PVA aqueous solution is 10%.

[0088] The raw materials used in the method consist of:

[0089]

[0090] The rest is polyvinyl alcohol.

[0091] The method for preparing low-viscosity polyvinyl butyral resin may further comprise the steps:

[0092] (1) Fully dissolve 15kg of PVA in deionized water at 90-98°C to obtain a 10% PVA aqueous solution;

[0093] (2) Add 0.21 kg of potassium hydroxide to the solution obtained in step (1), adjust the pH value of the solution in the range of 9 to 11, then add 1.39 kg of hydrogen peroxide and 0.0027 kg of accelerator to fully degrade PVA;

[0094] (3) After adjusting the temperature of the solution obtained in step (2) to 30-40°C, add 0.035kg of sodium dodecylbenzenesulfonate;

[0095] (4) Afte...

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Abstract

The invention relates to a preparation method of low-viscosity polyvinyl butyral resin, and the preparation method comprises the following steps of: regulating the temperature of a polyvinyl alcohol water solution to 0-5 DEG C by adopting a two-step precipitation method; and then adding an acid catalyst and butyl aldehyde for acetalation reaction to obtain the low-viscosity polyvinyl butyral resin. The preparation method disclosed by the invention can obtain the PVB (Polyvinyl Butyral) resin with higher acetalization degree through formula and process control and enhances the adhesive force; and the PVB resin can achieve the butyraldehyde group more than 80% and can be used for ink, coating and adhesives.

Description

technical field [0001] The present invention relates to a kind of polyvinyl butyral PVB resin, preparation method and application thereof, in particular to a kind of preparation method of low viscosity polyvinyl butyral PVB resin, which is mainly used in the production of coatings, inks and adhesives Among them, it belongs to the field of polymer chemical industry. Background technique [0002] Polyvinyl butyral (PVB) is prepared by acetalization reaction of polyvinyl alcohol (PVA) and butyraldehyde (BA) under acid catalysis. It is a non-toxic, odorless and non-corrosive resin . Because the PVB molecule contains a long branched chain, it has good flexibility, low glass transition temperature, high tensile strength and impact strength; PVB has excellent transparency, good solubility, excellent insulation performance, very good Light resistance, water resistance, heat resistance, cold resistance and film-forming properties; the functional groups it contains can carry out var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F16/06C08F8/50C08F8/28C09D129/14C09D11/106C09J129/14
Inventor 洪锐彬邹向城
Owner 东莞市龙怡阻燃材料有限公司
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