Professional manufacturer of white PVA powder in Shandong Province

Professional white powder manufacturer in Shandong Province
h Used as an 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. Moisture-proof and fire-proof.
h 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, fireproof and moisture-proof,
h Polyvinyl alcohol
Also known as sizing resin (r)
, 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 sand, and the quality of the solution
.
The amount of borax will gel
the aqueous solution, and the amount of borax required to cause the
gelation of the aqueous solution of the same concentration is
. For polyvinyl alcohol aqueous solutions of 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, ethers, and hydrocarbons than
. 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 property of polyvinyl alcohol when heated can be improved by adding
.
～
were inhibited by 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.
Professional white powder manufacturer in Shandong Province