TET (Titanium Acetylacetonate, Tyzor AA-Equivalent): The Chelated Titanate Catalyst for Waterborne Coatings and 1K RTV Silicone
SEMITECH stocks TET — diisopropoxy bis(2,4-pentanedionato) titanium (CAS 17927-72-9), also known as Tyzor AA-equivalent — as 75% solution in isopropanol. The chelated alternative to bare TBT, hydrolytically stable for hours to days in waterborne formulations and one-component RTV systems where conventional alkoxide titanates would hydrolyse prematurely. 25 kg HDPE drums, 2–4 week ex-China lead time.
Contents
| 17927-72-9 | 75% | 25 kg |
|---|---|---|
| CAS number | In IPA solution | MOQ |
Chemistry & Specifications
Ti(IV) bis-acetylacetonate diisopropoxide; orange-yellow viscous liquid; chelated; hydrolytically stable.
TET (CAS 17927-72-9) — MW 364.3, supplied as 75% in IPA. Bidentate acac chelation locks the Ti centre against hydrolysis far more effectively than monodentate alkoxide ligands. TiO₂ assay 8.4–8.6% (in solution), water ≤1.0%, APHA 200–500 (orange-yellow chromophore expected). Functionally equivalent to DuPont/Dorf-Ketal Tyzor AA.
Cure Mechanism: Chelation-Stabilised Ti(IV) Lewis Acid for Slow-Release Crosslinking
Two acac chelates suppress Ti hydrolysis; thermal or pH-shift dissociation releases active Ti(IV); slow-release for 1K systems.
TET is a "blocked" titanate: at room temperature the acac ligands resist hydrolysis and the catalyst sits dormant, extending shelf life from hours (bare TBT) to weeks or months. Activation via: (1) thermal — heating above 80–100°C; (2) pH-shift during waterborne paint dry-down; (3) ligand exchange with amines/hydroxyls.
- Loading 0.5–2.0% — waterborne 1K acrylic and alkyd paints
- Loading 1.0–3.0% — 1K RTV silicone with extended shelf life
- Loading 0.3–1.0% — flexographic and rotogravure ink crosslinker
- Loading 1.0–2.5% — high-build epoxy primer for marine and industrial coatings
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Applications & Formulation Guidance
Waterborne paints (largest), 1K RTV silicone, flexographic ink crosslinker, anti-corrosive primer, paper sizing.
Waterborne paint crosslinker at 0.5–2.0% — salt-spray performance improves from 240 hr to 500–800 hr. 1K RTV silicone at 1.0–2.5% — allows 12–18 month cartridge shelf life; the only practical chemistry for retail neutral-cure sealants. Ink crosslinker at 0.3–1.0% for rub and water resistance. Anti-corrosive primer at 1.0–2.5% for marine and offshore coatings.
Procurement, Storage and Quality Control
CoA per shipment; 25 kg HDPE; 12-month sealed shelf life; tolerates ambient humidity unlike bare TBT.
CoA per batch: TiO₂ assay (8.4–8.6%), water (≤1.0%), APHA (200–500), density, viscosity. MOQ 25 kg. Lead time 2–4 weeks to Asia, 4–6 weeks to Europe/North America. Storage far less critical than TBT — chelation provides 10–100x longer hydrolytic stability. Store sealed below 30°C (IPA flash point ~22°C, flammable storage class). Opened drums consumable within 6 months. TET is REACH-registered; FDA 21 CFR 175.300 listed for indirect food-contact.
TET Specification Sheet (75% Solution in Isopropanol)
SEMITECH stocked grade; CoA per batch.
| Property | Specification | Test Method |
|---|---|---|
| Chemical name | Titanium diisopropoxide bis(acetylacetonate) / Titanium acetylacetonate | — |
| Synonyms | Tyzor AA-equivalent / Ti AcAc / TET | — |
| CAS number | 17927-72-9 | — |
| Molecular formula (anhyd.) | Ti(OC₃H₇)₂(C₅H₇O₂)₂ | — |
| Molecular weight (anhyd.) | 364.3 g/mol | — |
| Form | 75 wt% in isopropanol | — |
| TiO₂ content (in solution) | 8.4–8.6% | Gravimetric ignition |
| Appearance | Orange-yellow viscous liquid | Visual |
| Density (20°C) | 1.00–1.02 g/cm³ | ASTM D1475 |
| Viscosity (25°C) | 50–100 cP | Brookfield |
| Water content | ≤1.0% | Karl Fischer |
| APHA colour | 200–500 (acac chromophore expected) | ASTM D1209 |
| Flash point | 22°C (IPA solvent, closed cup) | ASTM D93 |
| Solubility | IPA, n-BuOH, MEK, toluene; partially miscible with water | — |
| Packaging | 25 kg HDPE / 200 kg lined steel drum | — |
| Shelf life | 12 months sealed below 30°C | — |
FAQ
+Why does my waterborne paint with bare TBT lose performance after 4–6 weeks?
Bare TBT hydrolyses in aqueous formulation within 2–4 weeks. Switch to TET — acac chelation extends pot-life to 6–12 months at the same Ti content. Replace 1.0% TBT with 1.5% TET.
+Can I use TET for PET polymerisation?
Possible but suboptimal. The acac ligand introduces extra side products (acetylacetone vapour). TBT or TPT bare alkoxides remain dominant for PET.
+What is the difference between TET (Tyzor AA) and Tyzor GBA?
Tyzor AA uses acetylacetone chelation; GBA uses ethyl acetoacetate — slightly faster activation, broader pH stability. SEMITECH TET is the AA equivalent; GBA available make-to-order with 4–6 week lead time.