GOHSENX™ LW is a low saponification hydrophilic PVOH that is also compatible with alcohols. So far, low saponification PVOHs, (35 to 60 mol% saponification), have been used in diverse applications including hot melt resins, dispersing auxiliaries for suspension polymerization of vinyl chloride, adhesives, coating agents, binders and pressure-sensitive adhesives.
Low saponification PVOHs are usually water insoluble, which is a disadvantage, limiting ease of handling and the scope of applications. In contrast, GOHSENX™ LW has hydrophobicity associated with low saponification PVOHs, but can be handled in the form of an aqueous solution.
|Product Grade||Saponification Degree (mol%)||Viscosity*1(mPa.s)||pH*2||Applications|
|LW-100||39.0-46.0||500-2,500||39 ~ 41% aqueous solution||Dispersing auxiliary for suspension polymerization of vinyl chloride, Adhesives, Binder, Anchor coating agent|
*2 : 4% aqueous solution at 30 degree C
Secondary Suspension Agent for Polyvinyl Chloride Polymerization
By using GOHSENX™LW series as secondary suspension agent for polyvinyl chloride polymerization, it’s possible to improve the properties of PVC resins.
- Good efficiency
- Less foaming
- Higher porosity
- Higher absorption of plasticizers
- Fewer fish eyes
- Elimination of residual VCM
PVC Polymerization Result
GOHSENX™ LW products have, in their molecular structure both a hydrophilic portion. They can be dissolved in or absorb water, and various polar organic solvents such as methanol, ethanol, acetone, ethylene glycol and DMSO.
Solubility / Liquid Absorption Properties of GOHSENX™ LW
|Solvent||Solvent Solubility Parameter||Dissolubility/liquid Absorption Property|
|(cal · cm-3)1/2||LW-100|
|Methyl ethyl ketone||9.0||B|
A: fully dissolved, B: almost dissolved, C: virtually not absorbing liquid
|Product Grade||Saponification Degree (mol%)||Tg (degree C) water 0%||Tg (degree C) 20 degree C 65% RH||TM (degree C)|
Measuring conditions: Measurement with DSC (temperature increase/decrease rate: 10 degree C/min
|Product Grade||COD (mg/kg)x 104||BOD5 (mg/kg)x 10S2|
- Measuring conditions: COD (Mw) JIS K0102-17 (1998)
BOD5 JIS K0102-21/32.3 (1998)
- Measurement: Registration No. of measurement certification enterprise, Osaka No. 10013, KK Osaka Environmental Technology Center