Introduction and Applications of Diisopropoxybis(ethoxyacetylacetonato)titanium
Diisopropoxybis(ethoxyacetylacetonato)titanium (standard name: diisopropyl titanate bis(ethyl acetoacetate), corresponding to DuPont brand name Tyzor DC, also known as TCA-DC) has a CAS number of 27858-32-8, EINECS number 248-697-2, molecular formula C₁₈H₃₂O₈Ti, and molecular weight of 424.32. It is a type of bis(ethyl acetoacetate) titanate chelate, a light red viscous liquid at room temperature, and can undergo cross-linking reactions with active groups such as hydroxyl and carboxyl groups at relatively low temperatures. 1. Paints, Coatings, and Inks
• Crosslinking resin, improving adhesion, hardness, heat resistance, water resistance, and solvent resistance
• Improves adhesion to plastic substrates such as OPP and PE
• Used as a dehydrating agent to eliminate trace amounts of water in the system
• Enhances stain resistance and reflectivity to light and heat
Solvent-based systems containing resins with active functional groups such as PA, NC, PU, PVB, CAB, CAP, and EVA
2. Adhesives and Sealants
• Promotes addition reactions (polyurethane, epoxy adhesives, and silicone adhesives)
• Improves adhesion to substrates such as metals, stone, and plastics
• Used as a low-activity catalyst for one-component room-temperature vulcanizing silicone rubber
Epoxy, polyurethane, silicone, and other adhesive systems
3. Organic Synthesis
• Esterification reaction catalyst (esters, polyesters, unsaturated polyesters)
• High yield, low by-products, mild reaction conditions
Various organic synthesis reactions requiring mild catalysis
4. Filler and Fiber Surface Treatment
• Activates fillers, improving dispersibility
• Enhances the interfacial bonding force between fillers and resins
Inorganic fillers such as calcium carbonate and talc, glass fibers, etc.
5. Resin Modification
• End-capping, chain extension, crosslinking, improving resin molecular weight and stability
• Improves resin processing performance and mechanical properties
Unsaturated polyester resins, acrylic resins, UV resins, alkyd resins, etc.
Addition Method and Key Parameters
1. Addition Amount
Recommended dosage: Usually 0.5~3% of the total weight of the resin solids, which needs to be adjusted according to the system and desired effect.
Special circumstances:
When used as a dehydrating agent, it can be added in a ratio of 1:1~1:2 to the water content of the system.
When used in silicone sealants, it is often used in combination with low-activity titanium chelates (such as bis(ethyl 3-oxobutanoato-O1,O3)[1,3-propanediolato-O,O]-Titanium) to adjust the surface drying time.
2. Timing and Method of Addition
Addition stage: It is recommended to add it in the final stage of ink and coating manufacturing (after grinding and cooling to) Below 40°C), avoiding premature crosslinking caused by high temperatures.
Addition Method:
Add directly to the system and stir evenly (stirring for 5-15 minutes is recommended).
It can be diluted with a small amount of solvent (toluene, xylene, etc.) before adding to improve dispersion.
Substrate Pre-treatment: The surface tension of the plastic substrate needs to be treated to 36-38 dynes to obtain the best adhesion effect.
3. Precautions
Temperature Control: The addition and storage temperature should not exceed 40°C to avoid decomposition affecting the effect.
Avoid Contact with Water: Although it can be used as a dehydrating agent, excessive moisture will lead to hydrolysis and failure.
Compatibility: It has good compatibility with most solvent-based resin systems. It is recommended to conduct a small-scale test before use.
Safety Protection: Avoid skin contact and inhalation. Good ventilation is required during operation.
Summary
This compound is a multi-functional titanate chelate. With its mild crosslinking and catalytic properties, it is widely used in coatings, inks, adhesives, and other fields. By following the core principles of adding 0.5-3% of the resin solid content, adding it in the later stage below 40°C, and pre-treating the substrate to 36-38 dynes, stable performance improvement can be achieved.
