Effect of polyvinyl alcohol thickener and its added amount

August 24, 2022

Pva Sundy Jpg

Polyvinyl alcohol thickener began to be researched and developed in China in the 1950s, and Pva products began to appear in the market in 1970. Due to the continuous improvement of the synthesis technology and the continuous reduction of the price, it has been widely used and developed rapidly., Its thickening characteristic for polyvinyl alcohol (PVA) glue is that it can give play to the potential of polyvinyl alcohol. It is an ideal thickener for construction glue and can be called a companion. The thickening effect is obvious. It does not change the performance of the original glue and still maintains the affinity (mixing ability) of the original glue to cement, styrene acrylic lotion and other inorganic and organic materials. The PVA glue thickened with borax cannot be mixed with cement.

Polyvinyl alcohol thickener is a synthetic polymer. Polyvinyl alcohol is obtained by polyvinyl acetate (PVAc) and then alcoholysis or water. Due to the existence of carboxyl groups, PVA has high water absorption and is a water-soluble polymer with excellent performance and wide applications. Polyvinyl alcohol is a kind of soluble resin, which is generally used in textile sizing, adhesive, construction and other industries.

In addition to being used in the glue industry, polyvinyl alcohol thickener can also be used as a special dispersant for polyvinyl alcohol glue, a leveling agent for leather and printing and dyeing processing, a degreasing agent for wool, an emulsifier for crude oil and fuel oil, a penetrating agent for oil production acidification, a styrene butadiene latex, a lotion polymerization emulsifier, a glass fiber textile lubricant and an emulsifier. It is widely used.

The problems that customers worry about when using polyvinyl alcohol thickener: affect the gloss and appearance of the appearance; The function of the stock solution will not be affected. Worry about affecting the adhesive force; High shear stirring demulsification, low shear viscosity is unstable; Poor compatibility and delamination. China's thickening technology is constantly maturing, and the above problems have been solved. Especially in the problems of different shear forces and concerns about compatibility, most of the compatibility in China is very good. Considering the problem of gloss, we should choose to combine with coating thickener according to our own needs to achieve thickening and good gloss.

Recommended dosage of polyvinyl alcohol thickener:

0.2% - 1.0% of the total formula. The amount of addition depends on the type of glue, the degree of thickening and other desired rheological properties. Keep away from fire source when storing. Seal the thickener in a cool and ventilated place.

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