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

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...

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.