Overview
Modified polyvinyl alcohol (PVOH) is graded according to different degrees of polymerization, hydrolysis and copolymerization monomers.
The modification of PVA is mainly to use the double bonds, ester groups and the chemical activity of the hydroxyl group after alcoholization of vinyl acetate to change the side chain group or structure, and introduce other monomers to become copolymers dominated by PVA.
General properties
Polyvinyl alcohol is a water-soluble polymer made by alcoholysis of polyvinyl acetate. The properties of different grades are mainly determined by molecular weight and residual acetyl content.
PVOH (PVC Grade) is the main suspension agent that has been developed for PVC suspension polymerization. The ideal grain size can be obtained at low concentration polymer. In addition, the precise control of the particle size distribution is achieved, and the PVC particles are more spherical. Using the PVOH (PVC Grade), PVC particle density with good porosity is produced while maintaining a satisfactory volume. The plasticizing speed, "fisheye" count and residual vinyl chloride monomer levels are greatly improved by the use of PVOH (PVC Grade).
Storage
Modified PVA for PVC can be stored for an unlimited period of time under appropriate conditions that is in its original packs in closed, dry rooms, at room temperature.
Product Summary
Title | Main categories | Solids | Degree of hydrolysis | viscosity | Packages |
|
PVOH 452 | Auxiliary dispersant | 40.0±1.0% | 43.0-47.0 | 800-2400 | 25℃ BF DV2T(mPa.s) | In 200 kg/drum |
PVOH 552 | Auxiliary dispersant | 53.0-57.0 | <2400 | In 200 kg/drum | ||
PVOH 725 | Primary dispersant | 98.0 | 71.0-75.0 | 4.8-7.0 | 4% aqueous solution 20 °c(mPa.s) | In 25 kg/bag |
PVOH 735 | Primary dispersant | 98.0 | 73.0±1.0 | 5.3±0.5 | In 25 kg/bag | |
PVOH 745 | Primary dispersant | 73.5±1.5 | 6.0±0.5 | In 25 kg/bag | ||
PVOH 785 | Primary dispersant | 78.0±1.5 | 6.0±0.5 | In 25 kg/bag | ||
PVOH 8035 | Primary dispersant | 80.0±1.5 | 35.0±3.0 | In 25 kg/bag | ||
PVOH 8039 | Primary dispersant | 80.0±1.5 | 39.0±3.0 | In 25 kg/bag | ||
PVOH 8048 | Primary dispersant | 80.0±1.5 | 48.0±3.0 | In 25 kg/bag | ||
PVOH 8548 | Primary dispersant | 85.0±2.5 | 48.0±3.0 | In 25 kg/bag | ||
PVOH 8850 | Primary dispersant | 88.0±1.5 | 50.0±3.0 | In 25 kg/bag |