Knowde Enhanced TDS
Identification & Functionality
- CASE Ingredients Functions
- Technologies
Features & Benefits
- Product Highlights
BENEFITS
- Low formaldehyde release
- Very good early stacking properties
- High gloss films
APPLICATION AREAS
Industrial wood coatings
Applications & Uses
- Markets
- Compatible Polymers & Resins
Properties
- Physical Form
- Appearance
- Clear Liquid
- Insoluble in
- Water
- Partially Soluble in
- Aliphatic Hydrocarbons
- Typical Properties
- Solubility & Compatibility
SOLUBILITY
Alcohol Complete Esters Complete Ketones Complete Aromatic hydrocarbons Complete Aliphatic hydrocarbons Partial Water Insoluble COMPATIBILITY
Acrylic resins Medium Alkyd resins Good Polyester resins Good Nitrocellulose Good Cellulose acetate butyrate Good Polyvinyl butyrate Good
| Value | Units | Test Method / Conditions | |
| Color | max. 15 | APHA | — |
| Non-Volatile Content | 60-64 | %wt | — |
| Free Formaldehyde Content | max. 0.3 | % | — |
| Viscosity (25°C) | 2000-4000 | mPa.s | — |
Technical Details & Test Data
- Backbone Polymer Selection
CYMEL U-663 resin is a very effective crosslinking agent for backbone polymer resins containing hydroxyl functional groups, such as alkyd, polyester or acrylic resins. CYMEL U-663 resin has high reactivity and a high tendency for selfcondensation providing fast drying films with good gloss, hardness and block resistance. The optimum level of CYMEL U-663 resin in an acid curing wood coating formulation should be in the range of 25-35% on total resin solids. To obtain formulations with optimum resistance properties, addition of a melamine resin, such as CYMEL MB-98, at levels of 5-10% on total resin solids is recommended.
- Catalysis
The CYMEL U-663 resin responds best to strong acid catalysts, like CYCAT® 4040 catalyst. Generally, 6-10% CYCAT 4040 catalyst on total binder solids of the formulation is sufficient to obtain fast drying behavior at room temperature.
- Stability
STORAGE STABILITY
CYMEL U-663 resin has a shelf life of 720 days from date of manufacture when stored at temperatures below 32°C. Although low temperatures are not detrimental to stability, the viscosity of the product will increase making the resin more difficult to pump or pour. Product viscosity can be returned to normal by gentle warming, however, care should be taken to avoid excessive localized heating as this can cause an irreversible increase in viscosity.
Storage & Handling
- Shelf Life
- 720 Days
- Pot Life
To extend catalyzed pot life of the formulation, addition of primary alcohols, such as n-butanol, ethanol, and methanol, is required at concentrations of 10- 25% on total resin solids. Faster evaporating alcohols will improve speed of dry