Speciality Grades
Anionic PVOH GOHSENAL
GOHSENAL
GOHSENAL is a unique anionic PVOH whose many advantages include excellent water resistance, hygroscopicity, solubility and bonding strength.
- Properties
-
- ・Its aqueous solution behaves as a polymer electrolyte.
- ・Its solubility in water is much better than ordinary PVOH.
- ・Its aqueous solution excels in viscosity stability, is less prone to abnormalities in fluidity under high shearing speed conditions, and performs excellently in high-speed coating operations.
- Its solubility in aqueous alkali solutions is excellent.
- ・It features good compatibility with water-soluble polymers such as starch.
- ・It forms a chelate with a metal ion (in particular, aluminum ion) to cross-link and insolubilize the metal ion.
- ・As a result of coating operation for paper, it greatly improves the surface strength and strength in Z-axis of the paper.
- ・It features much better barrier properties than ordinary GOHSENOL
| Product Grade | Viscosity mPa・s (4%,20 degree C) |
Saponification Degree mol % |
pH -4% |
Applications |
|---|---|---|---|---|
| T-330H | 27.0~32.0 | 99.0 or higher | 6.0~8.0 | Printing stock, coat paper, NCR paper, release paper, emulsifying stabilizer, adhesive, film, Drillg fluid control agents |
| T-330 | 27.0~33.0 | 95.0~98.0 | 6.5~7.5 | |
| T-350 | 27.0~33.0 | 93.0~95.0 | 6.5~7.5 |
Applications:
The possible applications of GOHSENAL T include:
- Paper-related agents
- Surface strength improvement, printability improvement, vessel pick prevention, improved Z-axis strength, barrier effect (oil resistance, chemical resistance)
- Plywood adhesives
- Initial bonding strength
- Cement and mortar additives
- Stabilization of alkalinity
- Textile sizing agents
- Divide performance, fluff binding effect, wear resistance improvement, desizing readiness
| IGT Pick Strength (cm／sec) |
Z-axis Strength (kg／cm) |
Permeability (sec) |
Oil Absorptiveness (sec) |
|
|---|---|---|---|---|
| GOHSENAL T-330H | 95 | 2.5 | 10 | 12 |
| GOHSENAL T-330 | 90 | 2.3 | 13 | 20 |
| GOHSENAL T-350 | 85 | 2.2 | 35 | 80 |
| GOHSENOL N-300 | 65 | 1.7 | 8 | 10 |
| Oxidized starch | 50 | 1.3 | 8 | 8 |
Base stock:L-BKP 100 % ,basis weight 66g/m2 Size press:90m/min line pressure 11kg/cm
Drying:150 degree C×3min Coating weight:1g/m2
Dissolution and Storage
- Dissolving GOHSENAL
- Usually, PVA is used in the form of an aqueous solution. Solubility in water varies depending on the type of PVA. GOHSENAL, a carboxyl group-modified PVA, boasts higher solubility than GOHSENOL.
GOHSENAL is charged into room temperature water in small amounts, and thoroughly dispersed. The water is heated, with constant stirring, the temperature is kept at 80 to 90 degree C for 30 to 60 minutes.
- Storing GOHSENAL T
- Avoid storage in tanks or pipes that can readily rust. When considering blending GOHSENAL with a defoaming agent, rust preventive agent, or antiseptic agent, refer to the handling instructions of the chemical being blended.
| Polymer | COD(mg/l) | BOD5(mg/l) |
|---|---|---|
| GOHSENAL T-330 | 990 | 8.3 |
| GOHSENOL | 600~1000 | 5~10 |
| Corn Starch | 360 | 740 |
Measuring conditions:Sample concentrations mean pure material concentrations.
COD was measured by potassium permanganate method (JIS K 0102), and BOD5 means the BOD value of over 5 days.
Measurement: Registration No. of measurement certification enterprise, Osaka No. 10013, KK Osaka Environmental Technology Center.
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