CYMEL® 3745 Resin

Other characteristics

Brand

CYMEL

End Uses

Solventborne Coating, Waterborne Coating

Functions

Crosslinking Agent

Compatible Polymers & Resins

Acrylics, Alkyds, Epoxies (EP), Polyesters

Markets

• Automotive & Transportation
• Paints & Coatings

Catalysis

CYMEL 3745 resin reacts according to the specific acid catalysis mechanism, consequently it will respond best to sulfonic acid catalysts, like CYCAT® 4040 catalyst, or the blocked version, CYCAT 4045 catalyst. Generally, 0.5 to 1.0% catalyst solution on total binder solids of the formulation is sufficient to provide good cure at baking schedules of 20 minutes at 120°C to 160°C. 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.

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Stability

FORMULATION STABILITY; The stability of formulated systems containing CYMEL 3745 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 3745 resin has a shelf life of 1080 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.

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Appearance

Clear Liquid

Shelf LIfe

1080 Days

Coating Type

• Solventborne Coating
• Waterborne Coating

Insoluble In

Water

Technology

CASE Ingredients

HIGHLIGHTS

• BENEFITS
• Very high solids contents
• Excellent deformation and film flexibility
• Good film appearance.
• APPLICATION AREAS
• Can and container coatings
• Foil and paper coatings
• High solids and waterborne coatings

Partially Soluble in

Aliphatic Hydrocarbons

Backbone Polymer Selection

CYMEL 3745 resin contains mainly methoxymethyl functionalities making it a very effective crosslinker for backbone polymer resins containing hydroxyl, amide or carboxyl functional groups, such as those found on alkyd, polyester or acrylic resins. CYMEL 3745 resin is very compatible with a wide range of backbone polymers and provides films with very good hardness, flexibility, formability, adhesion and resistance properties. Although the optimum level of CYMEL 3745 resin in a given formulation should be determined experimentally, its effective equivalent weight will be typically in the range of 130-190

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Compatibility and Solubility

• SOLUBILITY
• COMPATIBILITY

Compatible Polymers and Resins

• Acrylics
• Alkyds
• Epoxies (EP)
• Polyesters