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CYCAT 4045

CYCAT 4045 is a strong, free sulfonic acid catalyst designed to accelerate the curing of amino resins such as melamine-formaldehyde systems in coating formulations.
CYCAT 4045 is commonly used in industrial coatings, including metal finishes, primers, and topcoats, where it enhances hardness, chemical resistance, and overall durability.
CYCAT 4045 provides excellent stability in high solids and waterborne systems, and in the latter it can be added without causing binder precipitation, which can often occur due to a drop in pH.

CAS Number: 110-97-4

Synonyms: CYCAT 4045, CYCAT 4045 solution, Free acid catalyst 4045, Unblocked sulfonic acid catalyst, Strong acid catalyst for coatings, Active acid curing catalyst, Fast-curing acid catalyst, Amino resin curing catalyst, Melamine curing catalyst (active type), Crosslinking catalyst (free acid), Industrial coating catalyst, Solvent-borne acid catalyst, Sulfonic acid-based catalyst, Clear coating catalyst solution, Rapid-action curing catalyst

This makes CYCAT 4045 suitable for systems requiring rapid curing and high productivity.
CYCAT 4045 is commonly used in industrial coatings, including metal finishes, primers, and topcoats, where it enhances hardness, chemical resistance, and overall durability.
Due to its high activity, careful formulation is necessary to control pot life and prevent premature curing.

CYCAT 4045 is an amine blocked para-toluene sulfonic acid catalyst.
CYCAT 4045 is recommended for accelerating the cure response of amino crosslinking resins while providing improved formulation package stability compared with the un-blocked para-toluene sulfonic acid CYCAT 4040 catalyst.

CYCAT 4045 is especially recommended for use with highly alkylated amino crosslinking resins.
CYCAT 4045 provides excellent stability in high solids and waterborne systems, and in the latter it can be added without causing binder precipitation, which can often occur due to a drop in pH.

As a general rule systems which employ a blocked catalyst such as CYCAT 4045 will have a decreased rate of cure compared to those employing an unblocked catalyst.
CYCAT 4045 has been formulated to minimize to this adverse effect on cure response while offering improved package stability.

CYCAT 4045 is amine blocked para-toluene sulfonic acid catalyst.
CYCAT 4045 is recommended for accelerating the cure response of amino cross-linking resins while providing improved formulation package stability.

CYCAT 4045 is suggested for use with highly alkylated amino crosslinking resins.
CYCAT 4045 provides excellent stability in high solids and waterborne systems, and in the latter it can be added without causing binder precipitation, which can often occur due to a drop in pH.

CYCAT 4045 minimizes film wrinkling.
CYCAT 4045 is designed for general industrial finishes, automotive basecoats, coil- and exterior can coatings.
The shelf life of CYCAT 4045 is 720 days at 32°C.

CYCAT 4045, categorized under CASE Ingredients' additives, is specifically formulated to cater to the demands of the automotive, transportation, and marine coatings sectors.
Offered in a clear liquid state, this catalyst is designed to seamlessly integrate with metal substrates, ensuring an efficient and effective application process.

Applications of CYCAT 4045:
CYCAT 4045 is used as a strong acid catalyst in coating formulations to accelerate the curing of amino resins.
CYCAT 4045 is widely applied in industrial coatings for metal substrates where fast curing and high productivity are required.

CYCAT 4045 is used in primers, topcoats, and clear coats to achieve rapid crosslinking and high hardness.
CYCAT 4045 is suitable for baking enamels and systems requiring short curing times.
CYCAT 4045 is also used in alkyd, polyester, and acrylic resin systems to improve chemical resistance and durability.

Application Areas:
General Industrial Finishes
Automotive basecoats
Coil coatings
Exterior can coatings

Benefits of CYCAT 4045:
Fast cure response
Excellent stability in waterborne and solvent borne systems
Minimizes film wrinkling

Solubility of CYCAT 4045:
CYCAT 4045 is soluble in oxygenated solvents such as alcohols, glycols, glycol ethers and water.
CYCAT 4045 has limited solubility in ketones, esters and hydrocarbon solvents.

Catalyst Addition of CYCAT 4045:
In order to prevent recrystallization of the acid, a sufficiently high level of alcohol should be present in the total solvent system of the formulation.
Recrystallized acid can cause a reduction in cure response and may create local areas of high aciditiy that could cause the formation of gel structures.
Therefore, it is suggested that CYCAT 4045 be diluted approximately 1: 1 with an alcohol before adding to the final formulation.

Recommended Levels of CYCAT 4045:
CYCAT 4045 contains 20 % active acid and has an equivalent acid number of 60 - 70.
Therefore, CYCAT 4045 is 50 % less active than the un-blocked CYCAT 4040 catalyst.
Therefore, in comparison with CYCAT 4040 catalyst it is recommended that twice the level of CYCAT 4045 be used to provide approximately the same cure response.

Stability and Reactivity of CYCAT 4045:

Chemical stability:
Stable under recommended conditions.
Highly reactive as a free acid.

Reactivity:
Reacts readily with amino resins.
Risk of premature curing.

Conditions to avoid:
Heat.
Open flames.
Moisture.
Strong bases.

Incompatible materials:
Strong bases.
Alkaline pigments.
Oxidizing agents.

Hazardous decomposition products:
Carbon oxides (CO, CO₂) may form.
Sulfur oxides (SOₓ) may be released.

Handling and Storage of CYCAT 4045:

Handling:
Use with adequate ventilation.
Avoid inhalation.
Avoid direct contact with skin and eyes.

Storage:
Keep tightly closed in a cool, dry, and well-ventilated place.

Storage conditions:
Protect from heat.
Protect from ignition sources.
Protect from incompatible materials.

First Aid Measures of CYCAT 4045:

Inhalation:
Move to fresh air.
Seek medical attention if symptoms persist.

Skin contact:
Wash with soap and water.
Remove contaminated clothing.

Eye contact:
Rinse with water for several minutes.
Seek medical advice if irritation continues.

Ingestion:
Rinse mouth.
Do not induce vomiting.
Seek medical attention.

Firefighting Measures of CYCAT 4045:

Suitable extinguishing media:
Foam.
Dry chemical.
Carbon dioxide (CO₂).

Hazards:
Flammable vapors may be present.
Toxic gases may form during combustion.

Protection:
Use self-contained breathing apparatus.
Wear protective clothing.

Accidental Release Measures of CYCAT 4045:

Precautions:
Use appropriate personal protective equipment.
Avoid inhalation and contact.

Cleanup:
Absorb with inert material.
Dispose according to regulations.

Exposure Controls / Personal Protection of CYCAT 4045:

Engineering controls:
Ensure adequate ventilation.

Personal protective equipment:
Wear chemical-resistant gloves.
Use safety goggles.
Wear protective clothing.
Use respirator if needed.

Hygiene measures:
Wash hands after handling.
Avoid eating or drinking during use.

Identifiers of CYCAT 4045:
Product name: CYCAT 4045
Chemical type: Free (unblocked) sulfonic acid catalyst
Physical state: Liquid
Appearance: Clear to slightly yellow solution

Product Type: Sulfonic Acid
Master Product Number: MITM00208
Product SKUs: ITM14367, ITM14368
CAS: 110-97-4

Properties of CYCAT 4045:
Physical state: Liquid
Appearance: Clear to slightly yellow solution
Chemical nature: Free (unblocked) sulfonic acid catalyst
Solvent: Organic solvent system (typically alcohol-based)
Density: ~0.95–1.05 g/cm³ (25 °C)
Viscosity: Low viscosity

Appearance: Clear liquid
Acid Value, mg KOH/g: 60-70
Color, Gardner: ≤ 1
Density, g/ml: ~1.15
% Active ~20