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Preparation method for polyvinyl butyral resin

A polyvinyl alcohol and resin technology, applied in the field of preparing polyvinyl butyral, can solve problems such as affecting product production, and achieve the effects of improving reactivity, reducing hydroxyl value, and promoting the formation of microphases

Active Publication Date: 2018-12-21
吉林诺德高科新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the heterogeneous reaction system, the impact of hydrochloric acid on the product is more obvious, especially in the late stage of the heterogeneous reaction, as the solubility of PVB decreases, precipitation occurs, and its agglomeration and entrapment are unavoidable, which greatly affects the product. Production

Method used

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  • Preparation method for polyvinyl butyral resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 800mL of deionized water to a 2000mL four-necked bottle equipped with a stirrer, a thermometer and a dropping funnel and heat it to 98°C with an electric heating mantle. Add 100g of polyvinyl alcohol in batches until the polyvinyl alcohol is completely dissolved. An aqueous solution of polyvinyl butyral was prepared.

[0035] Catalyst preparation method

[0036] A series of organic sulfonic acid compounds with C10-C30 were prepared by acidification with sodium sulfonate.

[0037] At 0-5°C, add 5-20 g of organic sulfonic acid sodium salt into 10 times the amount (mass) of 1 mol / L hydrochloric acid solution, and extract the aqueous phase with ether. The organic phase was dried, filtered and concentrated to prepare organic sulfonic acid.

Embodiment 2

[0039] At 0-5°C, add 20 g of sodium dodecylsulfonate to 10 mL of 1 mol / L hydrochloric acid solution, and extract the aqueous phase three times with 20 mL of ether. The organic phase was dried over anhydrous sodium sulfate for 1-2 hours, the organic phase was dried, filtered and concentrated, concentrated under low temperature and reduced pressure to obtain 10.2 g of dodecylsulfonic acid light yellow oil.

Embodiment 3-6

[0041] Using the same method as in Example 2, different sodium salts were selected, and a series of sulfonic acid catalysts were prepared under low-temperature acidification conditions.

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Abstract

The invention relates to a method for preparing polyvinyl butyral by utilizing organic sulfonic acid catalysis. A sulfonic acid catalyst with a long chain structure is chosen and added with inorganicsalt to promote the process of reaction, consequently, while the sufficient reaction of the materials is ensured, the efficiency is increased, on the other hand, the molecular structure is regulated on the microcosmic level, and thereby a novel low-viscosity product is obtained.

Description

technical field [0001] The invention relates to a method for preparing polyvinyl butyral by catalyzing organic sulfonic acid. Background technique [0002] Polyvinyl Butyral Resin (Polyvinyl Butyral Resin, PVB) is a resin synthesized by acetal reaction of polyvinyl alcohol (PVA) and butyraldehyde under acidic conditions. It has high transparency, cold resistance, impact resistance and ultraviolet radiation resistance. Good adhesion to metal, glass, wood, ceramics, fiber products, etc. [0003] Polyvinyl butyral film (PVB film) is a material for the production of the middle layer of safety laminated glass. It is mainly used in windshield glass of automobiles, high-rise building glass, glass curtain wall, bulletproof glass, corridor protective glass, etc., to improve the impact resistance of glass. . This kind of glass has higher strength, which can absorb the damage caused by the impact of foreign objects, and at the same time, it can also prevent the risk of surrounding p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/28C08F116/06
CPCC08F8/28C08F116/06
Inventor 陈庆江
Owner 吉林诺德高科新材料有限公司
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