Knowde Enhanced TDS
Identification & Functionality
- CASE Ingredients Functions
- Technologies
Features & Benefits
- Product Highlights
BENEFITS
- Film appearance
- Adhesion and intercoat adhesion
APPLICATION AREAS
- Automotive topcoat formulations
- High solids primer formulations
Applications & Uses
- Applications
- Compatible Polymers & Resins
- Compatible Substrates & Surfaces
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 Very good Alkyd resins Very good Polyester resins Very good Epoxy resins Very good
| Value | Units | Test Method / Conditions | |
| Color | max. 40 | — | APHA |
| Non-Volatile Content | min. 98 | %wt | — |
| Free Formaldehyde Content | max. 0.1 | % | — |
| Viscosity (25°C) | 2400-3800 | mPa.s | — |
Technical Details & Test Data
- Backbone Polymer Selection
CYMEL 1168 resin contains mainly methoxymethyl and iso-butoxymethyl functional sites making it a highly effective crosslinker for backbone polymer resins containing hydroxyl, carboxyl, or amide functional groups, such as those found on alkyd, polyester, or acrylic resins. Its high monomer content, and low tendency to self-condense results in films with high flexibility and formability when paired with inherently flexible polymers, such as polyester resins. The effective equivalent weight of CYMEL 1168 typically ranges from 170-250, however, its optimum loading should be determined experimentally for each formulation with consideration of the performance properties to be optimized.
- Catalysis
Because of its high extent of alkylation, CYMEL 1168 resin responds best to sulfonic acid catalysts, like CYCAT® 4040 catalyst or CYCAT® 600 catalyst. Generally, 0.5 to 1.0% of CYCAT 4040 catalyst on total resin solids of the formulation is sufficient to provide good cure at normal baking schedules (15-20 minutes at 120-150°C) in solvent-borne systems. Water-borne systems generally require temperatures of 150°C or higher to effect cure. Higher concentrations of catalyst might be necessary if there are basic pigments or additives present in the formulation.
- Stability
FORMULATION STABILITY
The stability of formulated systems containing CYMEL 1168 resin can be enhanced by the addition of primary alcohols, amines or a combination of these. Low molecular weight primary alcohols, such as ethanol and n-butanol, are most effective. Recommended amines are DMEA or 2-AMP at a concentration of 0.5- 1.0% on total resin solids. Package stability can also be enhanced by the use of a blocked acid catalyst such as CYCAT 4045 catalyst. For waterborne systems, pH should be adjusted to 7.5-8.5 to achieve optimum stability.
STORAGE STABILITY
CYMEL 1168 resin has a shelf life of 1800 days from the date of manufacture when stored at temperatures below 32°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
- 1800 Days