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Manufacturing method of polyvinyl butyral film

A technology of polyvinyl butyral and polyvinyl butyral resin, which is applied in the field of polyvinyl butyral film manufacturing to achieve the effects of avoiding aging, preventing discoloration and reducing impurities

Inactive Publication Date: 2017-02-15
ANHUI WANWEI UPDATED HIGH TECH MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a manufacturing method of polyvinyl butyral film, to solve the problems in the manufacturing process of PVB film and improve the white quality of PVB film products

Method used

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  • Manufacturing method of polyvinyl butyral film
  • Manufacturing method of polyvinyl butyral film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present embodiment prepares polyvinyl butyral resin according to the following steps:

[0026] (1) Dissolution of polyvinyl alcohol

[0027] Wash polyvinyl alcohol with a degree of polymerization of 1700, a degree of alcoholysis of 99.8%, and a molecular weight distribution of 2.5 with deionized water for 3 times, then prepare a polyvinyl alcohol solution with a mass concentration of 24% with deionized water, and heat to 80°C After heat preservation for 1 hour, the temperature was raised to 100° C. to dissolve completely, then diluted with water to 12%, and filtered under pressure to obtain a polyvinyl alcohol solution.

[0028] (2) Pretreatment of n-butyraldehyde

[0029] The n-butyraldehyde is subjected to vacuum distillation to remove impurities, and the pretreated n-butyraldehyde is sealed with nitrogen for use.

[0030] (3) Synthesis of PVB resin

[0031] With the treated 400g polyvinyl alcohol solution and 240g n-butyraldehyde as raw materials, with 60g mas...

Embodiment 2

[0044] 400g of PVB resin corresponding to Product 1 in Example 1 is mixed with plasticizer triethylene glycol diisocaprylate 2g, antioxidant DLTP 0.8g, auxiliary agent sodium dodecyl aryl sulfonate 0.2g, and the obtained The mixed solution is evenly fed into the extruder by the feeding system, heated to 120°C by the extruder, uniformly plasticized and turned into a molten state, and then flows out from the die lip after being filtered, cooled and shaped, and formed into a 0.76mm PVB film.

[0045] Other conditions remain unchanged, change the quality of plasticizer, antioxidant and auxiliary agent, or change heating temperature, make PVB film by the above-mentioned same method.

[0046] The properties of the obtained PVB film under each condition are shown in Table 2.

[0047] The performance of gained PVB film under each condition of table 2

[0048]

[0049] From Table 2, it can be concluded that the ultra-white PVB film obtained by the present invention is at plasticizer ...

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Abstract

The invention discloses a manufacturing method of a polyvinyl butyral film. The manufacturing method is characterized by comprising the following steps: pretreating polyvinyl alcohol and n-butanal raw materials to reduce impurities in the raw materials; then performing a condensation reaction, and performing washing and solvent soaking on generated polyvinyl butyral resin after the reaction to remove side reactions generated by the condensation reaction and residual impurities; and finally, performing heating melt plasticization and tape casting on the dried polyvinyl butyral resin together with a plasticizer, an antioxidant and an auxiliary agent in an extruding machine, thereby obtaining the polyvinyl butyral film. According to the manufacturing method disclosed by the invention, by reducing the impurities in the raw materials, the polyvinyl butyral resin with relatively high transparency is obtained, and by adding the antioxidant and the auxiliary agent, the polyvinyl butyral film can avoid aging discoloration in processing and using processes.

Description

technical field [0001] The invention relates to a manufacturing method of polyvinyl butyral film. Background technique [0002] Polyvinyl butyral (PVB) film is a plasticized film based on PVB resin. PVB resin is a product formed by the condensation reaction of polyvinyl alcohol and n-butyraldehyde. It has good light resistance, cold resistance, Water resistance, transparency, impact resistance and film-forming properties, non-toxic, odorless, non-corrosive properties, good bonding properties to wood, ceramics, metal, leather and glass, etc., its application fields are very wide. [0003] PVB film is a polymer material extruded from PVB resin through a plasticizer. It is a translucent film with characteristics of cold resistance, heat resistance, transparency, and high mechanical strength. The surface is smooth, free of impurities, and has a certain degree of roughness. And good flexibility, good adhesion to inorganic glass, widely used in the manufacture of safety glass, ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/14C08K5/372C08K5/103C08F16/06C08F8/28
CPCC08K5/372C08F8/28C08K5/103
Inventor 胡安宁王平林刘帮柱陈建旭朱宝华陈争艳戴伟陈莉莉田宗杰
Owner ANHUI WANWEI UPDATED HIGH TECH MATERIAL CO LTD
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