Aldehyde-free odorless environment-friendly and transparent polyvinyl alcohol (PVA) glue and preparation method thereof

A PVA glue, transparent technology, applied in the direction of adhesive types, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of complex process, containing aldehydes, etc., to achieve high viscosity, mild reaction conditions, and easy operation. simple effect

Inactive Publication Date: 2012-10-31
HENAN UNIV OF CHINESE MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above situation, in order to solve the defects of the prior art, the object of the present invention is to provide a kind of aldehyde-free, odorless, environmentally friendly transparent PVA glue and its preparation method, which can effectively solve the problems of the prior art with complex processes or containing harmful substances such as aldehydes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Add 368ml of water into a 1L four-neck bottle, slowly add 32g of PVA under stirring, at room temperature 18-25°C, after stirring evenly, raise the temperature to 90°C, after the dissolution is complete, cool down to 60°C, add modifier 1,2-B Diol 1.28g, modified at 55-60°C for 1 hour, cooled to room temperature 18-25°C, added 0.01g preservative boric acid, and transparent PVA glue was obtained.

Embodiment 2

[0013] Add 384ml of water into a 1L four-neck bottle, slowly add 16g of PVA under stirring, at room temperature 18-25°C, after stirring evenly, raise the temperature to 92°C, after the dissolution is complete, cool down to 70°C, add modifiers 1, 2, 3 - Glycerol 0.32g, modified at 65-70°C for 45 minutes, lowered to room temperature 18-25°C, added 0.005g preservative boric acid, and transparent PVA glue was obtained.

Embodiment 3

[0015] Add 360ml of water into a 1L four-neck bottle, slowly add 40g of PVA under stirring, at room temperature 18-25°C, after stirring evenly, raise the temperature to 95°C, after the dissolution is complete, cool down to 75°C, add modifiers 1, 2, 3 , 2.4g of 4,5-pentapentanol, modified at 70-75°C for 45 minutes, cooled to room temperature 18-25°C, and added 0.02g of preservative boric acid to obtain transparent PVA glue.

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PUM

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Abstract

The invention relates to aldehyde-free odorless environment-friendly and transparent polyvinyl alcohol (PVA) glue and a preparation method thereof, and can effectively solve the problem of complex technology or containing of harmful substances such as aldehydes in the prior art. The technical scheme includes that the glue is produced by the PVA, water, a modifier and a preservative, wherein, by weight, the PVA accounts for 1-15% of the glue, the modifier accounts for 0.5-10% of the PVA, the preservative accounts for 0.01-0.05% of the PVA and the balance water. The method includes mixing the PVA with the water at a room temperature of 18-25 DEG C, heating up to 85-100 DEG C after evenly stirring, cooling to 45-80 DEG C after completely dissolving, adding in the modifier and modifying for 0.5-2 hours at a temperature of 45-85 DEG C, cooling to the room temperature of 18-25 DEG C, adding in the preservative, and obtaining the glue. According to the PVA glue and the preparation method thereof, the reaction condition is relatively mild, the operation is simple, the glue is aldehyde-free, odorless, transparent, innovative, high in viscosity, low in production cost and prone to industrial production.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a formaldehyde-free, odorless, environment-friendly and transparent PVA glue and a preparation method thereof. Background technique [0002] Transparent wallpaper glue, office transparent glue, label glue, etc. mostly use PVA (ie polyvinyl alcohol) as the main raw material, but most of them contain aldehyde harmful substances, and some patents report aldehyde-free PVA glue, but the preparation process is complicated. [0003] Chinese patent (CN1280373C) reported a modified PVA adhesive, which used hydrophobic agent A, modifier R, acrylamide or ammonium thiocyanate 10% sodium hydroxide aqueous solution. This patent solution has the advantage of being environmentally friendly and free of aldehydes, but it uses more materials and more complicated invisible components, which is not convenient for industrial production; Chinese patent (CN101445710B) provides a preparation method of cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04C09J11/04
Inventor 刘孟奇白若飞赵纪强
Owner HENAN UNIV OF CHINESE MEDICINE
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