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The difference between PVA1799 and PVA1788

LIWEI CHEMICAL CO. LTD

Polyvinyl alcohol 1799, also known as sizing resin, is a white or yellowish powder or a floc solid. It is soluble in hot water at 90-95 ° C and is almost insoluble in cold water. At room temperature, the gel will freeze and will become thinner at high temperatures to restore fluidity.

Polyvinyl alcohol 1799 is more resistant to solvents such as benzenes, esters, ketones, ethers than polyvinyl alcohol 1788. It gradually changes color when heated to above 100 °C, and discolors rapidly when it is above 150 °C, and decomposes when it is above 200 °C. The property of discoloration upon heating of polyvinyl alcohol can be suppressed by 0.5% to 3% of boric acid.

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