Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- CASE Ingredients Functions
- Technologies
Features & Benefits
- Labeling Claims
- CASE Ingredients Features
- Product Highlights
BENEFITS
- Excellent environmental etch resistance
- Excellent exterior durability
- Non-formaldehyde chemistry
- Non-isocyanate chemistry
- Cure compatibility with other crosslinkers
- Low equivalent weight / high efficiency
- Low human toxicity
APPLICATION AREAS
- Automotive topcoats
- Coil coatings
- Exterior can coatings
- Solvent-borne and waterborne coatings
Applications & Uses
- Applications
- Compatible Substrates & Surfaces
- Coating Type
- Recommended Uses & Known Applications
USE AS A CO-CROSSLINKING AGENT
A significant advantage of CYMEL NF 2000A resin is its cure compatibility with other thermoset chemistries. Since its cure response with hydroxy-functional resins is not appreciably inhibited by amines, acids, or metal catalysts, it can be used effectively as a co-crosslinking agent with other materials, such as traditional aminoplasts or isocyanates. Incorporation of low levels of CYMEL NF 2000A resin (e.g. 1-5 wt. % on total resin solids) into a conventional polyol/aminoplast coating formulation can significantly improve the exterior durability of the cured film.
USE IN WATERBORNE SYSTEMS
CYMEL NF 2000A resin can be used in water-reducible resins and with waterborne dispersions. Although it is water insoluble, it can be incorporated into a water-reducible system by blending with the backbone resin prior to amine neutralization. These systems can be cured at ~125°C to give clear, high gloss films with excellent resistance properties. When using the material in water-based systems it is recommended that a tertiary amine be utilized as the neutralizing agent for the system in order to avoid the possibility of degrading the CYMEL NF 2000A resin.
Properties
- Appearance
- Clear to Slightly Hazy
- Insoluble in
- Water
- Typical Properties
- Solubility & Compatibility
SOLUBILITY
Alcohol Soluble Esters Soluble Glycol ethers Soluble Aromatic hydrocarbons Soluble Water Insoluble COMPATIBILITY
Acrylic resins Good Alkyd resins Very good Polyester resins Very good Epoxy resins Good
| Value | Units | Test Method / Conditions | |
| Color | max. 100 | APHA | — |
| Non-Volatile Content | 48-52 | %wt | — |
| Viscosity (23°C) | 18537 | mPa.s | — |
Technical Details & Test Data
- Reactivity & Backborne Polymer Selection
- CYMEL NF 2000A resin contains a combination of butyl and methyl carbamate functionality which enables it to crosslink backbone polymers containing hydroxy, epoxy and carboxy functionality. Unlike conventional amino resins, CYMEL NF 2000A resin has very little tendency to self-react during cure, so its effective equivalent weight is in the range of 120-130. In formulations where it is employed as the sole crosslinker, the level of CYMEL NF 2000A resin is normally adjusted to provide a ratio of 1.0 - 1.1 equivalents of carbamate functionality per equivalent of backbone polymer functionality.
- CYMEL NF 2000A resin reacts with hydroxy functional backbone resins at >125°C bake schedules to form urethane linkages. Cure can typically be accomplished without use of a catalyst to yield films that exhibit excellent hardness, chemical resistance, exterior durability and environmental etch resistance. Addition of low levels of acid catalyst (e.g. 0.5% dodecyl benzene sulfonic acid on binder solids) has been found to improve humidity resistance properties in some systems. Both catalyzed and uncatalyzed formulations show good 1K package stability at 23°C. CYMEL NF 2000A resin will react with carboxy functional backbone resins, but requires bake temperatures >150°C.
- CYMEL NF 2000A resin reacts very efficiently with epoxy functional resins at ~125°C resulting in N-substituted carbamate and oxazolidone crosslinks. Films produced through this cure mechanism often show a favorable combination of environmental etch resistance and mar resistance properties. In most cases, a tertiary amine or quaternary ammonium catalyst such as 4-dimethylaminopyridine should be employed in the formulation. However, catalyzed pot life can be limited, making it necessary to treat these as two-component systems.
Packaging & Availability
- Country Availability
- Regional Availability
Storage & Handling
- Shelf Life
- 365 Days
- Stability
STORAGE STABILITY
CYMEL NF 2000A resin has a shelf life of 365 days from the date of manufacture when stored at temperatures below 32°C.