Product Information
Resins/Films
Water-soluble copolymer that offers high water resistance
Resins/Films
Vinyl Acetate Derivatives
EXCEVAL™
- General name
- Special modified polyvinyl alcohol (resin)
- Sales format
- Granules/fine powder with defined grain size
- Examples
-
EXCEVAL™ is the trade mark of Kuraray’s hydrophobically modified polyvinyl alcohol especially designed for the requirements of “high water resistance”. When used as a dispersing aid / protective colloid for the manufacture of polyvinyl acetate emulsion for wood adhesives, high water resistance like DIN D3 level can be achieved. This level of performance is accomplished without the addition of any cross-linking agents thanks to the excellent water resistance of EXCEVAL™ itself. EXCEVAL™ contributes to the production of “formaldehyde free”, environmentally friendly wood adhesives.
Applications
Adhesives
Ceramic
Paper
Textile sizing and finishing
Photosensitive coatings
Pigmented paper coatings
Barrier coating of films, paper and other substrates from aqueous solutions
Characteristics
| EXCEVAL™ | Main applications | ||
|---|---|---|---|
| 1 | Improved water-resistance of film. Better viscosity stability in aqueous solutions at low temperatures. | Vinyl acetate emulsions and adhesives | Improves water resistance of emulsions and adhesives, and stabilizes liquidity at low temperatures (during the winter) |
| Paper processing agent | Improves water resistance and reduces amount of coating needed for undercoat for release paper (supports use of non-organic solvents), overcoats, paperboards and pigment binders | ||
| 2 | Highly biodegradable | Sizing agent for textiles | Minimizes environmental impact from desizing wastewater, improves weaving efficiency through high film strength and reduces amount of size pick-up required |
| 3 | Easily absorbed by inorganic materials | Inorganic binder | Easily absorbed by ferrite primary particles, increases green strength and improves productivity |
| 4 | Suitable for thermoplastic processing | Water-soluble films Water-soluble materials Water-soluble nonwoven fabrics |
Enables production of water-soluble films, molded materials and nonwoven fabrics through thermoplastic processing |
Standard grades and properties
| Type | Grade | Volatile matter % | Sodium acetate % | Hydrolysis mol% | Viscosity (4%, 20℃) mPa·s | Purity % |
|---|---|---|---|---|---|---|
| Fully hydrolyzed | AQ-4104 | 5.0 or lower | 1.0 or lower | 98.0 - 99.0 | 3.5 - 4.5 | 94.0 or higher |
| HR-3010 | 5.0 or lower | 1.3 or lower | 99.0 - 99.4 | 12.0 - 16.0 | 94.0 or higher | |
| RS-2117 | 5.0 or lower | 1.0 or lower | 97.5 - 99.0 | 25.0 - 30.0 | 94.0 or higher | |
| Medium hydrolyzed | RS-1717 | 5.0 or lower | 1.0 or lower | 92.0 - 94.0 | 23.0 - 30.0 | 94.0 or higher |
Related website
Contact us
Click here for inquires (EXCEVAL™)- Poval Resin Sales Management Department, Poval Resin Division
Kuraray Co., Ltd. -
Tokiwabashi Tower, 2-6-4, Otemachi, Chiyoda-ku, Tokyo, 100-0004, Japan
Tel.: +81-3-6701-1451
Fax.: +81-3-6701-1460
