Hunan Province white PVA powder, polyvinyl alcohol 2488 manufacturer sales price

Hunan Province white powder, polyvinyl alcohol manufacturer sales price
br White flaky floc or powdery solid, odorless. <>
br Used as emulsion stabilizer for polyvinyl acetate emulsion polymerization. Used in the manufacture of water-soluble adhesives. Used as a modifier for starch adhesives. It can also be used to prepare photosensitive adhesives and sealants resistant to benzene solvents. Also used as release agent, dispersant, etc. Store in a cool, dry warehouse away from moisture and fire. <>
br Polyvinyl alcohol
Abbreviation
,
White granules or powder. Easily soluble in water, dissolution temperature
~
℃. Other properties are basically the same as
. Used as emulsion stabilizer for emulsion polymerization. Used in the manufacture of water-soluble adhesives. Store in a cool, dry warehouse, fire-proof and moisture-proof,<>

br Polyvinyl alcohol
is also called sizing resin
, referred to as
. White or slightly yellow powder or floc solid. Glass transition temperature
℃, saponification value
~. Soluble in hot water at
~
℃, almost insoluble in cold water. Aqueous solutions with a concentration greater than
will gel and freeze at room temperature, and will become thinner and regain fluidity at high temperatures. In order to stabilize the viscosity, an appropriate amount of sodium thiocyanate, calcium thiocyanate, phenol butanol and other viscosity stabilizers can be added to the solution.
The solution is more sensitive to the gel than
caused by borax. The solution quality
of borax will gel the aqueous solution, causing the aqueous solution of the same concentration to coagulate. The amount of gelled borax is required. For polyvinyl alcohol aqueous solutions with the same concentration and alcoholysis degree, borax is more likely to gel than boric acid.
It is more resistant to solvents such as benzene, chlorinated hydrocarbons, esters, ketones, ether hydrocarbons, etc. It will gradually change color when heated to
℃ or above. It will change color quickly when heated to
℃ or above. It will decompose when heated to
℃ or above. The discoloration of polyvinyl alcohol when heated can be inhibited by adding boric acid. It has good light resistance and is not affected by light. It has chemical reactivity such as esterification, etherification, and acetalization of long-chain polyols. Open fire will burn and have a special smell. Non-toxic and non-irritating to human skin. <>
Hunan Province white powder, polyvinyl alcohol manufacturer sales price