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Titanium Alkoxides Supplier — TPT, TBT, TET, TEHT & Poly-Butyl Titanate Portfolio

SEMITECH stocks five titanium alkoxide grades — TPT, TBT, TET, TEHT, and poly-butyl titanate — for PET polymerization, sol-gel deposition, and industrial esterification.
Contents
Key Numbers
≥99%
Ti compound purity
5
Commercial grades stocked
5–15 ppm
Ti dosing rate in PET

Five-Grade Portfolio: Alkoxide Selection by Application

TBT, TPT, TIPT, TEOT and TBT-S — five alkoxides with distinct hydrolysis kinetics, used as PET polymerisation catalysts, sol-gel precursors, and ester-exchange agents.

SEMITECH’s titanium alkoxide range spans five commercial grades differentiated by alkyl chain length, hydrolysis rate, and viscosity. TPT and TET carry the shortest chains (C3, C2), delivering fast hydrolysis kinetics ideal for sol-gel thin-film work. TBT and its oligomeric form poly-butyl titanate (BPT) are the workhorses for PET polymerization and esterification, offering controlled reactivity and thermal stability at 200–250 °C. TEHT provides the highest hydrolysis resistance of the five, suited to moisture-sensitive coating systems. All grades are supplied at ≥99.0 wt% Ti compound purity with full CoA, ICP-OES verification, and shelf-life documentation.

  • TPT — Tetraisopropyl titanate — fast hydrolysis, sol-gel precursor, crosslinker for coatings and adhesives.
  • TBT — Tetra-n-butyl titanate — PET polycondensation catalyst benchmark; broad industrial use.
  • TET — Tetraethyl titanate — highest Ti wt% (21%), preferred for optical-grade TiO2 sol-gel films.
  • TEHT — Titanium 2-ethylhexyl titanate — bulky ligands extend pot life >8 h; moisture-tolerant systems.
  • BPT — Poly-butyl titanate — oligomeric TBT; reduced volatility and leaching in esterification duty.

PET Catalyst: Upstream Feedstocks and Downstream Demand

TBT is the dominant PET polymerisation catalyst — global demand driven by 80M tonnes/yr PET production with SEMITECH shipping into the major Asian PET producers.

TBT is the dominant titanium-based PET polycondensation catalyst, replacing antimony trioxide where EU and FDA metal-migration limits apply. Upstream, TBT derives from TiCl4 (chloride-process, ≥99.5% purity) reacted with n-butanol; n-butanol supply tracks propylene oxide and oxo-synthesis capacity, adding a second-tier feedstock risk layer. Downstream, global PET demand runs approximately 80 million tonnes per year — split across bottle resin (43%), polyester staple fiber (31%), and film (12%). Catalyst dosing of 5–15 ppm Ti means small alkoxide supply swings carry disproportionate PET output leverage. TiCl4 allocation to pigment-grade TiO2 production periodically constrains alkoxide availability during Q3 coatings demand peaks.

Sol-Gel Precursor & Esterification: Industrial Use Cases

TPT and TIPT for sol-gel synthesis of TiO₂ films and nanoparticles; TBT for transesterification in coatings, inks, and specialty esters.

TPT and TET serve as sol-gel precursors for TiO2 thin films in photocatalytic coatings, optical interference layers, and DSSC photoelectrodes. Controlled hydrolysis at 30–60% RH followed by calcination at 400–500 °C yields anatase TiO2 with BET surface areas of 40–80 m²/g. TEHT is preferred in humid industrial environments: its bulky 2-ethylhexyl ligands slow hydrolysis, extending pot life to >8 hours versus <30 minutes for TPT. In fatty acid esterification, BPT acts as a Lewis acid catalyst at 160–220 °C, achieving conversion rates >97% for C12–C18 oleate and stearate esters used in plasticizers and lubricant base stocks.

Supply Chain Dynamics, Trade Flows & Pricing Outlook

TiCl₄ feedstock from Chinese chlor-alkali integrators; alkoxide spot prices USD 4.5–9k/MT depending on grade with 2–4 week ex-China lead time.

Chinese producers hold approximately 65% of global titanium alkoxide capacity, concentrated in Jiangsu and Shandong provinces near TiCl4 feedstock clusters. TBT export pricing (drum, ex-works China) ranged USD 3,800–5,200/tonne in 2024–2025, driven by n-butanol volatility and TiCl4 allocation cycles. 2025 tariff escalations lifted North American landed costs 18–24%, accelerating secondary-supplier qualification among European and APAC buyers. SEMITECH holds bonded-warehouse inventory with 2–4 week lead times to APAC ports and offers 3- and 6-month forward contracts for price certainty on catalyst-critical procurement programs.

Grade Specification Comparison

Five-grade comparison — chemistry, CAS, TiO₂ content, hydrolysis rate, and primary downstream application.

The table below summarizes key specification parameters across SEMITECH’s five titanium alkoxide grades. Ti content is expressed as theoretical wt% based on stoichiometric molecular formula; actual purity is verified by ICP-OES. Viscosity is measured at 25 °C. Shelf life applies to sealed, nitrogen-blanketed storage at 15–25 °C.

GradeChemical NameCASMW (g/mol)Ti wt%Viscosity (mPa·s, 25°C)Shelf LifePrimary Use
TPTTetraisopropyl titanate546-68-9284.216.862–424 monthsSol-gel, crosslinker
TBTTetra-n-butyl titanate5593-70-4340.314.078–2024 monthsPET catalyst, coatings
TETTetraethyl titanate3087-36-3228.121.001–324 monthsSol-gel, optical film
TEHTTitanium 2-ethylhexyl titanate1070-10-6564.88.4950–20024 monthsMoisture-resistant coatings
BPTPoly-butyl titanate9022-96-2~1,000–3,000~12–14500–5,00018 monthsEsterification, adhesion
For PET catalyst qualification, TBT remains the industry benchmark at 5–15 ppm Ti dosing; buyers operating in moisture-exposed or humid environments should evaluate TEHT or BPT to prevent premature hydrolysis and unplanned batch losses.

FAQ

What is the difference between TBT and poly-butyl titanate (BPT)?
BPT is an oligomeric form of TBT with a degree of polymerization typically between 4 and 10, giving higher viscosity (500–5,000 mPa·s versus 8–20 mPa·s) and lower vapor pressure. Its oligomeric structure reduces catalyst leaching and volatility losses, making it the preferred form for esterification and moisture-tolerant coating systems where monomeric TBT’s reactivity would cause handling problems.
Why is TBT preferred over antimony trioxide as a PET catalyst?
TBT meets EU Regulation 10/2011 and FDA 21 CFR limits on metal migration in food-contact PET, enabling antimony-free polymer grades. Titanium-catalyzed PET also exhibits lower acetaldehyde generation at equivalent intrinsic viscosity targets — a critical quality parameter for carbonated beverage bottle resins where AA above 10 ppb causes off-taste.
How should titanium alkoxides be stored to prevent hydrolysis?
Store under dry nitrogen blanket in sealed stainless steel or HDPE containers at 15–25 °C, away from moisture sources. Exposure to atmospheric humidity above 500 ppm initiates irreversible hydrolysis within hours for TPT and TET. TBT and BPT tolerate brief air exposure but should be resealed within 15 minutes. Shelf life under correct inert conditions is 24 months from production date.
What BET surface area can be expected from TPT-derived sol-gel TiO2?
Calcination of TPT-hydrolyzed gel at 400 °C (anatase phase) typically yields BET surface areas of 40–80 m²/g, depending on water-to-alkoxide molar ratio (R = 4–10) and aging time. Higher R values and shorter aging favor smaller crystallites and higher BET. Sintering above 600 °C triggers anatase-to-rutile phase transition and collapses surface area below 20 m²/g.
How does upstream TiCl4 supply affect titanium alkoxide pricing?
TiCl4 is the shared feedstock for pigment-grade TiO2 and titanium alkoxides. During peak TiO2 pigment demand cycles, producers allocate TiCl4 preferentially to pigment lines, reducing alkoxide output and pushing spot prices 15–30% higher within a single quarter. Buyers running continuous PET catalyst programs should hedge with 3–6 month forward contracts to avoid forced spot-market exposure.
Which titanium alkoxide grade is best suited for fatty acid esterification?
Poly-butyl titanate (BPT) is the standard selection for fatty acid esterification at 160–220 °C, delivering >97% conversion for C12–C18 fatty acid substrates at 0.05–0.2 wt% catalyst loading. Its oligomeric structure minimizes catalyst leaching versus monomeric TBT, simplifying post-reaction filtration and reducing Ti contamination in the final plasticizer or lubricant ester product.