Zirconium IV Neoalkanolato, Tris(diisooctyl-phosphato-O)
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Product Description
Zirconium IV neoalkanolato, tris(diisooctyl-phosphato-O) is a specialized organometallic compound used as a zirconate coupling agent. It features a central zirconium atom in the +4 oxidation state, coordinated with neoalkanolato ligands, which are deprotonated forms of highly branched alcohols, and tris(diisooctyl-phosphato) ligands, where each phosphate group is bonded to the zirconium through an oxygen atom and has two isooctyl groups attached. This compound is utilized to enhance the properties of filled polymer systems by modifying the surface of inorganic fillers, improving their dispersion and adhesion within a polymer matrix. This leads to improved mechanical strength, better flow, and reduced viscosity during processing. Additionally, it finds applications in catalysis, particularly in polymerization processes, and in the synthesis of advanced materials like ceramics and composites due to its high stability and unique properties.
Uses
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Coupling Agent and Adhesion Promoter:
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Enhances bonding between inorganic fillers (e.g., calcium carbonate, kaolin, talc, TiO₂) and organic polymers
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Improves dispersion, hydrophobicity, and rheological properties
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Mechanical Property Enhancer:
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Increases impact strength, tensile strength, modulus, and flexibility
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Reduces embrittlement
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Allows higher filler loadings without compromising performance
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Processing Aid:
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Reduces viscosity, cycle times (up to 40% in injection and blow molding), and processing temperatures (by about 9%)
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Acts as a plasticizer, lubricant, thixotrope, and suspension aid
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Catalyst:
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Serves as a urethane catalyst (22 times faster than dibutyltin dilaurate in two-component urethanes)
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Repolymerization catalyst
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Copolymerization catalyst
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Useful in phenolic resin manufacture
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Specialized Applications:
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In wood-plastic composites (WPC): Boosts tensile strength by 30-50% when blended with waste plastics and wood fibers
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In recycled/regrind thermoplastics: Restores properties to near-virgin levels (e.g., improving heat deflection temperature, melt flow, tensile modulus, and elongation in HDPE or LDPE/PP blends at 0.2% dosage)
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In foamed polymers: Produces finer, more uniform cell structures by strengthening polymer strains at high temperatures
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In coatings: Adhesion promoter for epoxy, acrylic, and urethane systems on metals and polymers; used in marine deck coatings with TiO₂/Zn molybdate/silicone-alkyd
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Enhances conductivity in metal powder-filled polymers
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Improves properties in halogenated polymers, aramid-reinforced epoxies, and filled PVC
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Acts as a compatibilizer for plastic alloys via chemical modifications like grafting or copolymerization
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Other Uses:
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Reduces moisture sensitivity
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Prevents phase separation
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Serves as a corrosion inhibitor, flame retardant activator, or anti-aging agent in various thermoplastic, thermoset, and elastomeric systems
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Properties and Characteristics
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Systematic Name: Zirconium IV Neoalkanolato, Tris(diisooctyl-phosphato-O)
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Common Names: Zirconate Coupling Agent, Ken-React NZ 38, ZCA-N12
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CAS Registry Number: 117101-65-2
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Molecular Formula: C₆₀H₁₂₃O₁₅P₃Zr
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Approximate Molecular Weight: 1267.9 g/mol
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Appearance: Orange to red viscous liquid
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Viscosity: 150 cps at 25°C
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Specific Gravity: 1.07 at 20°C
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Flash Point: 77°C (Tag Closed Cup method)
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Other Characteristics:
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Better thermostability than monoalkoxy zirconates
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Greater overall stability compared to titanates
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Does not cause discoloration in the presence of phenols (except nitrophenols)
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Does not interact with hindered amine light stabilizers (HALS)
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Renders inorganic materials hydrophobic, organophilic, and organofunctional
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Enhances UV stability in unfilled plastics
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Enables coupling of fluorinated polymers to metal substrates
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Packaging, Storage, and Safety
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Packaging: Available in 20 kg pails, 200 L drums, or 1000 L bulk containers
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Storage: Store in a cool, dry, ventilated area away from water, moisture, high temperatures, and fire sources. Shelf life is at least 12 months in sealed original containers at room temperature; test for quality if stored longer.
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Safety: Handle with care to avoid ignition sources. Suppliers recommend standard chemical handling precautions.