CYMEL® 203 Resin

1 of 102 products in this brand
CYMEL® 203 Resin functions as a crosslinking agent under the CASE Ingredients umbrella. Specifically designed for the automotive and transportation and paints and coatings sectors, this clear liquid is essential for automotive OEM coatings and coatings and finishes applications on metal surfaces.

Functions: Crosslinking Agent

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
Technologies

Features & Benefits

Product Highlights

BENEFITS

  • Excellent flow and leveling
  • Fast cure speed
  • Low formaldehyde release

APPLICATION AREAS

  • Can and container coatings
  • General industrial coatings
  • Automotive coatings

Applications & Uses

Compatible Substrates & Surfaces

Properties

Physical Form
Appearance
Clear Liquid
Insoluble in
Water
Partially Soluble in
Aliphatic Hydrocarbons
Typical Properties
ValueUnitsTest Method / Conditions
Colormax. 50APHA
Non-Volatile Content70-74%wt
Free Formaldehyde Contentmax. 0.5%
Viscosity (23°C)400-800mPa.s
Solubility & Compatibility

SOLUBILITY

Alcohol Complete
Esters Complete
Ketones Complete
Aromatic hydrocarbons Complete
Aliphatic hydrocarbons Partial
Water Insoluble

 

COMPATIBILITY

Acrylic resins Good
Alkyd resins Very good
Polyester resins Very good
Epoxy resins Good

Technical Details & Test Data

Backbone Polymer Selection

CYMEL 203 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 203 resin should be determined experimentally, ratios of 25 to 35% based on resin solids are typically most effective.

Catalysis

CYMEL 203 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 203 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 203 resin has a shelf life of 720 days from the date of manufacture when stored at temperatures below 32°C. Although lower 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 av

Storage & Handling

Shelf Life
720 Days