S-1500 Series Polyvinyl Alcohol
SNP’s 1500 series contain various polyvinyl alcohol products, which can be used in multiple applications. SNP works alongside the customer to determine what properties are needed for a given application, then suggest a product which best meets these criteria. Learn more about our polyvinyl alcohol chemicals below, and contact us for more information.
Polyvinyl Alcohol Chemistry
Polyvinyl alcohol is a water soluble crystalline polymer that has excellent film forming, emulsifying and adhesive properties. Polyvinyl alcohol is produced by the polymerization of vinyl acetate to polyvinyl acetate followed by an alcoholysis reaction to PVOH. The extent of the alcoholysis reaction will result in a specific degree of hydrolysis for the PVOH.
Degree of Hydrolysis
The degree of hydrolysis is the ratio of hydrophilic alcohol groups and hydrophobic acetate groups. The ratio contributes to the water resistance of the dried film. The fully hydrolyzed PVOH has better water resistance than the partially hydrolyzed PVOH.
Degree of Polymerization
The degree of polymerization is the expression of the size of the polymer and the molecular weight of the polymer. As the degree of polymerization is increased, you see:
- Higher solution viscosity
- Increased adhesion strength of the film
- Better solvent resistance
- Higher tensile strength of the film
Polyvinyl Alcohol Applications
- Paper coatings as a size press film former
- Board coatings as a protein replacement
- Water-soluble film useful for packaging
- Textile sizing agent
- Paper adhesive when combined with boric acid in spiral tube winding and solid board production
- Release liners
- Ink jet coating binder
- Optical brightener carrier
- Mold release for casting, such as epoxies
- Additive in offset printing fountain solutions
- Sacrificial coating layer