High-hydroformylation-degree polyvinyl butyral resin and preparation method thereof

A technology of polyvinyl butyral resin and high degree of formaldehyde, applied in coatings, adhesives, etc., can solve the problems of dependence on imports and no manufacturers, and achieve the effect of large profit margins

Active Publication Date: 2012-08-29
安徽皖维膜材料有限责任公司
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Problems solved by technology

Now with the development of the automobile industry, construction industry and photovoltaic industry, there is a huge deman

Method used

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Embodiment Construction

[0017] 1. Dissolution of polyvinyl alcohol

[0018] Dissolve polyvinyl alcohol in water, heat it to 98°C, and keep it warm for 2 hours to make a polyvinyl alcohol solution with a mass concentration of 16%, add water to cool down and make a polyvinyl alcohol solution with a mass concentration of 10%, filter it for use.

[0019] 2. Condensation

[0020] Add the polyvinyl alcohol solution to the condensation kettle, add an appropriate amount of hydrochloric acid and n-butyraldehyde, the mass ratio of the reaction material is polyvinyl alcohol:n-butyraldehyde:hydrochloric acid=8:4:3, and the mass concentration of hydrochloric acid is 31%; Butyraldehyde was added twice, and the ratio of the two inputs was 1:1. The specific control steps are: when the temperature of the first condensation kettle reaches 5°C, add hydrochloric acid and n-butyraldehyde; after 1 hour of reaction, add n-butyraldehyde again; after another 1 hour of reaction, send the reaction solution to the second conde...

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Abstract

The invention discloses high-hydroformylation-degree polyvinyl butyral resin and a preparation method thereof. The polyvinyl butyral resin with the hydroformylation degree of more than 78 percent is prepared by using polyvinyl alcohol and n-butanal as raw materials and hydrochloric acid as a catalyst through low-temperature continuous condensation and recondensation, wherein the reaction temperature during the low-temperature continuous condensation is 0 to 35 DEG C; and the reaction temperature during the recondensation is 5 to 75 DEG C. According to the invention, the hydroformylation degree of the polyvinyl butyral resin is increased and the application field of the polyvinyl butyral resin is expanded. According to the polyvinyl butyral resin prepared by the existing production technology in China, the hydroformylation degree is far less than the level, and the using fields are narrow and mainly comprise the fields of coating and adhesive. The product prepared by the method of the invention is mainly applied to the industries, such as automobile industry, building industry and photovoltaic industry, with high requirements on the polyvinyl butyral resin, and has large profit space.

Description

1. Technical field [0001] The invention relates to a polyvinyl butyral resin with a high degree of hydroformylation and a preparation method thereof. 2. Background technology [0002] Polyvinyl butyral resin has superior properties such as high transparency, cold resistance, impact resistance, and UV resistance, and has good adhesion to metal, glass, wood, ceramics, and fiber products. Polyvinyl butyral resin can be used to make interlayer materials for safety glass. The prepared safety glass has good transparency and high impact strength, and is widely used in aviation and automobile fields. In the paint industry, it is used to prepare anti-corrosion coatings, which have strong anti-rust ability; it can also prepare metal primers and cold-proof paints with good adhesion and water resistance. In the ceramic industry, it is used to make film decals with bright patterns, which can replace ceramic decals. The resin industry is used to manufacture pressed plastics instead of n...

Claims

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Application Information

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IPC IPC(8): C08F16/06C08F8/28C09D129/14C09J129/14
Inventor 吴福胜胡安宁刘帮柱夏云胜朱宝华陈健旭王平林
Owner 安徽皖维膜材料有限责任公司
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