Butyl titanate

Increased molecular association iacreases viscosity. Tetra-/-butyl titanate and tetraisopropyl titanate are mobile Hquids at room temperature tetra- -butyl titanate and tetra- -propyl titanate, TYZOR NPT [3087-37-4], are thick and sympy. The boiling poiats of these materials also reflect association (Table 1). 

P-Ketoester Chelates. p-Ketoesters react in a fashion similar to the p-diketones. TYZOR DC [27858-32-8] is the hght-yeUow Hquid from TYZOR TPT and two moles of ethyl acetoacetate (eaa) after removal of the isopropyl alcohol. TYZOR BEAT, the bis-ethylacetoacetate [20753-28-0] derived from the tetra- -butyl titanate, and TYZOR IBAY [83877-91-2] the isobutoxy analogue, perform similarly to TYZOR DC. Both, however, have better cold-storage stabiHty. 

Butyl titanate polymers find use in surface coatings but as a class, titanium polymers lack hydrolytic stability. 

The reaction between mono-octyl phthalate and i5tMx tanol (see Fig. 5.4-25) in the presence of a homogeneous catalyst (rert-butyl titanate) was studied in a batch reactor (Szarawara et al., 1991). This is the second step of the reaction between phthalic anhydride and o-octanol. First the ring is opened and mono-octyl phthalate is formed. Water is removed by evaporation as it is formed. The reaction was carried out at 174 °C. The initial concentration of mono-octyl phthalate was cpno = 1.85 mol/L and the ratio of initial concentrations of iio-octanol to mono-ooctyl phthalate coc.o/cph,o = 1.4. The reaction was... 

These are obtained by partial hydrolysis of organic o-titanates followed by polycondensation, e.g., o-butyl titanate ... 

Sheldon et al. [2] have shown that in the epoxidation of olefins with TBH, compounds like titanium acetylacetonate or tetra-n-butyl titanate containing Ti(IV) produce epoxides with extremely high selectivities (98%), even though the rate of reaction is generally lower with respect to Mo(VI) or V(V) catalysts. 

A 50-ml flask was charged with the step 3 product mixture (0.0218 mol), butyl titanate (0.00218 mol), and methyl methacrylate (0.152 mol) and heated to 95°C for 2 hours and treated with water (0.157 mol). The precipitate that formed was isolated by filtration and excess methyl methacrylate removed by vacuum distillation. The residue was purified by column chromatography and 5.86 g of product isolated as a mixture. 

The standard manufacturing method for tetraalkyl titanates, such as TYZOR TPT, or tetra- -butyl titanate, TYZOR TBT [5593-70-1]> involves the addition of TiQ4 to an alcohol. In a series of reversible displacement reactions, the alkoxy substitution products and hydrochloric acid form as follows ... 

Alkoxy-terminated siloxanes are treated with a trialkoxy-silane, in the presence of t-butyl titanate and a little... 

N.m.r. spectra of the dimethylaluminium-t-butyl titanate system are consistent with the exchange reaction 371... 

Derivation Reaction of butyl titanate with octylene glycol. 

Application from an organic solvent using a catalyst which promotes polymerization at normal temperature is an extremely simple operation. A suitable silicone (containing no SiH bonds) is selected and dissolved in white spirit with butyl titanate and padded or sprayed onto the material, which is then dried on any conventional drying machine, after which storage of about 48 hours at normal temperature is necessary for the polymerization to complete. The padding solution will not keep for more than 12 hours. 

The curing of the poly(ester-imide) resins in the ovens of the enameling machines occurs via a transesterification reaction. Ethylene glycol is formed and evaporated. This reaction is catalysed by titanium esters like butyl or polycresyl titanates. Combinations are known of butyl titanate with toluensulfonic acid... 

BUTYL TITANATE (5593-70-4) Combustible liquid (flash point 170°F/77°C cc). Reacts violently with oxidizers. Reacts with water, producing butanol and titanium dioxide. Incompatible with sulfuric acid, nitric acid, caustics, aliphatic amines, isocyanates, boranes. Reacts violently with sodium peroxide, uranium fluoride. 

Refractive index n550 of Ti02-films deposited from ethyl-dichlorotitanate (e) and butyl-titanate (b) as function of baking temperature Tt... 

As can be seen from the curves in both figures for films made of ethyl titanate, the formation of the oxide layer almost ceases at a rather low temperature of about 250°C. The reason is obviously that the required hydrolytic reaction of the liquid film with water vapour from the atmosphere starts even at room temperature and is practically complete at moderate tempering. Butyl titanate, however, is much more... 

Since alkali diffusion from a substrate into a crystallizing film requires time, the influence on the resulting structure type decreases from substrate/film boundary to film/air boundary depending on film thickness d. Thus, thin 2 films deposited on alkali glasses exhibit lower mean refractive indices n than thicker films. This effect is shown in Fig. 5 for 2 films made from butyl titanate solution and baked 1 h at 450°C and 500°C respectively [28]. The refractive index of 2 layers fabricated in this way is dependent on various production parameters it is clear... 

Mean refractive index n550 as function of layer thickness d of TiCVfilms deposited from butyl-titanate solution on (a) fused silica and (b) plate glass... 

Tetra-n-butyl- titanate Deionized water 600,3 36 - Anatase TiO, Nanopowder [140]... 

The transesterification reaction is typically carried out in a CSTR by continuously feeding a paste of premixed DMT/diol into a diol-ester prefllled reactor operating between 160 and 240 °C. Typically DMT/diol molar ratios of 1 2 to 1 2.2 are used for PET and 1 1.1 to 1 1.5 for PBT. The reaction for PET is catalyzed by a metal acetate. Zinc acetate is commonly used, but antimony, barium, calcium, and magnesium acetates may also be used. For PBT titanium orthoesters, such as tetra-butyl titanate, are employed as catalysts. The CSTR operates at low pressures, 0.1 to... 

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