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Highly effective tin-based catalyst for ambient-cure and low-bake polyurethane coating systems.
Excellent hydrolytic stability, minimizing side reactions and improving pot life.
Enables rapid crosslinking of OH-functional resins with aliphatic isocyanates.
Low volatility and favorable toxicological profile compared to traditional dibutyltin dilaurate (DBTDL).
Compatible with a broad range of acrylic, polyester, and polyether polyols.
Automotive clearcoats and basecoats requiring low-VOC, high-gloss finish.
Industrial maintenance coatings for metal substrates.
Wood finishing systems including furniture and cabinetry coatings.
Plastic coatings for automotive interior trim and consumer electronics.
Two-component (2K) polyurethane topcoats for architectural and decorative applications.
| Chemical Type | Organotin compound (monoalkyltin derivative) |
| Product Form | Clear, viscous liquid |
| Appearance | Colorless to pale yellow liquid |
| Primary Applications | Catalyst for 2K aliphatic PU coatings |
| Key Features | Ambient/low-temperature cure promotion, hydrolytic stability |
| Benefits | Reduced VOC potential, improved film hardness development, enhanced storage stability |
| Solubility | Miscible with common organic solvents (e.g., xylene, butyl acetate, PGMEA) |
| Storage | Store in original sealed container at 15–25°C; protect from moisture |
Q1: What is the primary function of ADDITOL P965 in coating systems?
A: ADDITOL P965 is a highly efficient tin-based catalyst designed to accelerate the crosslinking reaction between hydroxyl-functional resins and melamine or urea-formaldehyde crosslinkers, particularly in thermosetting solventborne and high-solids industrial coatings.
Q2: Is ADDITOL P965 compatible with acid-sensitive resins or pigments?
A: Due to its organotin chemistry, ADDITOL P965 is not recommended for formulations containing highly acid-sensitive components such as certain metal chelates, azo pigments, or base-catalyzed systems. Compatibility testing under actual formulation conditions is strongly advised.
Q3: How should ADDITOL P965 be incorporated into a coating formulation?
A: It is typically added during the let-down stage, after the main resin solution is prepared and cooled to ambient temperature. Pre-dilution in a compatible solvent may improve dispersion. Avoid prolonged exposure to elevated temperatures prior to curing.
Q4: What are typical handling and storage recommendations for ADDITOL P965?
A: Store in tightly sealed original containers in a cool, dry, well-ventilated area away from direct sunlight and strong oxidizing agents. Handle using appropriate personal protective equipment (PPE), including chemical-resistant gloves and eye protection, in accordance with standard industrial hygiene practices.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
