The degree of polymerization of polyvinyl acetate typically is 100 to 5000. The ester groups of the polyvinyl acetate are sensitive for alkali and will slowly convert PVAC into polyvinyl alcohol and acetic acid.
Under alkaline conditions, boron compounds, such as boric acid or borax causes the polymer to cross-link forming tackified precipitates or slime
this pvac granule is for industrial usage. The PVAC Granule is also called
polyvinyl acetate granule. It can be divided into higher, middle and lower
molecular. higher molecular PVAC Granule is normally used for Glass Fiber
Reinforced Plastics (GFR), like in Light Cover for automobiles; Lower molecular
PVAC Granule is used in Cement concret to form a more stable floor deck for
buildings.
Main Parameters:
Molecular: 10,000 to 300,000
Free Acid (CH3COOH): less than 0.05%.
Volatilizer: Less 1%.
Pb: Less 1.0mg/kg.
As: Less 3.0mg/kg.
Heavy metal: Less 10mg/kg.