Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- CASE Ingredients Functions
- Technologies
Features & Benefits
- Product Highlights
BENEFITS
- Low viscosity
- Fast cure response
- Low formaldehyde release
APPLICATION AREAS
- High solids coatings
- Waterborne coatings
- Coil coatings and metal decorating
- Automotive coatings
Applications & Uses
- Applications
- Compatible Substrates & Surfaces
- Coating Type
Properties
- Physical Form
- Appearance
- Clear Liquid
- Insoluble in
- Aliphatic Hydrocarbons
- Partially Soluble in
- Aromatic Hydrocarbons
- Typical Properties
- Solubility & Compatibility
SOLUBILITY
Alcohol Complete Esters Complete Ketones Complete Aromatic hydrocarbons Partial Aliphatic hydrocarbons Insoluble Water Complete COMPATIBILITY
Acrylic resins Very good Alkyd resins Very good Polyester resins Very good Epoxy resins Very good
| Value | Units | Test Method / Conditions | |
| Solvent | Iso-butanol, Butyl Cellosolve | — | — |
| Color | max. 70 | APHA | — |
| Non-Volatile Content | 68.5-71.5 | %wt | — |
| Free Formaldehyde Content | max. 1.5 | % | — |
| Viscosity (23°C) | 2500-3400 | mPa.s | — |
Technical Details & Test Data
- Backbone Polymer Selection
CYMEL 327-70 resin is an effective crosslinker for backbone polymer resins containing hydroxyl, carboxyl, and amide functional groups, such as those found on alkyd, polyester or acrylic resins. Although the optimum level of CYMEL 327- 70 resin should be determined experimentally, ratios of 25 to 35% based on resin solids are typically most effective.
- Catalysis
CYMEL 327-70 resin may not require the addition of an acid catalyst to the formulation to obtain effective cure. In many instances, the acidity of the backbone polymer in the formulation is sufficient to catalyze the reaction under normal baking conditions (15-20 minutes at 120-150°C). If catalyst addition is required, then 0.5-1.0% of CYCAT® 296-9 catalyst based on total resin solids is recommended.
- Stability
FORMULATION STABILITY
The stability of solvent-borne systems containing CYMEL 327-70 resin can be enhanced by the addition of primary alcohols, amines, or a combination of these. Low molecular weight primary alcohols such as ethanol or n-butanol are most effective. Recommended amines are TEA or DMEA at a concentration of 0.5- 1.0% on total binder solids. For best stability in waterborne systems, a pH of 7.5- 8.5 should be maintained using tertiary amines only.
STORAGE STABILITY
CYMEL 327-70 resin has a shelf life of 450 days from the date of manufacture when stored at temperatures between 5°C and 25°C. Although low temperatures are not detrimental to stability, its viscosity will increase, possibly making the resin difficult to pump or pour. The viscosity will reduce again on warming, but care should be taken to avoid excessive local heat as this can cause an irreversible increase in viscosity.
Storage & Handling
- Shelf Life
- 450 Days