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CYMEL® 202 Resin
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Producer: 
allnex
Brand: 
CYMEL
CYMEL® 202 is a methylated/n-butylated, high imino melamine crosslinker supplied in n-butanol. Its hydrophobic nature combined with high reactivity, high solids content, and rather low formaldehyde release during the curing process makes CYMEL 202 resin suitable for a wide range of medium to high solids or waterborne baking applications, like can and container coating formulations, automotive coatings, and low cure systems to improve film appearance and resistance properties. This product provides films with very good hardness, gloss, chemical resistance and outdoor durability.

CYMEL® 202 Resin

Producer: 
allnex
Brand: 
CYMEL
CYMEL® 202 is a methylated/n-butylated, high imino melamine crosslinker supplied in n-butanol. Its hydrophobic nature combined with high reactivity, high solids content, and rather low formaldehyde release during the curing process makes CYMEL 202 resin suitable for a wide range of medium to high solids or waterborne baking applications, like can and container coating formulations, automotive coatings, and low cure systems to improve film appearance and resistance properties. This product provides films with very good hardness, gloss, chemical resistance and outdoor durability.
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Features & Benefits

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Product Highlights

BENEFITS

  • Very fast cure response
  •  Medium to high solids
  •  Low formaldehyde release

APPLICATION AREAS

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

Properties

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Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Viscosity (at 23°C)2500-7500mPa.sDIN EN ISO 3219
Colormax. 70APHADIN EN ISO 6271
Non-Volatile Content78-82%wtDIN EN ISO 3251 (Pan,3 hrs/105°C)
Non-Volatile Content80-84%wtDIN 55671 (Foil, 45 min/45°C)
Free Formaldehyde Contentmax. 0.6%Sulfite Titration
Physical Form
Liquid
Appearance
Clear Liquid
Insoluble in
Water
Partially Soluble in
Aliphatic Hydrocarbons
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
Stability

FORMULATION STABILITY

The stability of solvent-borne systems containing CYMEL 202 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 202 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 avoid excessive local heat as this can cause an irreversible increase in viscosity.

Technical Details & Test Data

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Backbone Polymer Selection

CYMEL 202 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 202 resin should be determined experimentally, ratios of 25 to 35% based on resin solids are typically most effective.

Catalysis

CYMEL 202 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.

Storage & Handling

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Shelf Life
720 Days

Documents (2)

Name
Type
CYMEL® 202 Resin Technical Data Sheet - RU
Technical Data Sheet
CYMEL® 202 Resin Technical Data Sheet - EN
Technical Data Sheet