P-t-Butylphenol

Fig. 8. Constant acid-constant base frequency shift-enthalpy relations. Solid lines are constant acid lines. The phenol line also contains values for p-t-butylphenol, 4-, phenol, 0, p-chlorophenol, , m-trifluormethylphenyl, A. The acid butanol is H...

A mixture of 9.4 g of trans-4-guanidinomethylcyclohexanecarboxylic acid, 7.2 g of p-t-butylphenol and 10.0 g of dicyclohexylcarbodiimide was suspended in a solution of 61 ml of dry pyridine and ml of dry dimethylformamide, and the suspension was stirred at room temperature for 24 h.The solvent was removed under reduced pressure.The residue was washed and dried.There was obtained the 4 -t-butylphenyl trans-4-guanidinomethylcyclohexane-carboxylate. 

Purge the reaction vessel with nitrogen and load it with 100 g of p-t-butylphenol, 35 g of paraformaldehyde, 2 mL of a 10 M sodium hydroxide solution and 600 mL of xylene. 

The most readily available calixarenes are compounds derived from p-t-butylphenol, 1-3. In order to introduce functional groups at the upper rim of the calix, the f-butyl group has to be removed, and this can be performed in 70-90% yield by reacting the p-f-butylcalixarenes with an excess of anhydrous aluminium trichloride in toluene in the presence of phenol at room temperature (Scheme 7.10). The unsubstituted p-//calixarenes thus obtained are versatile intermediates which give access to hosts having a large variety of properties. 

Overberger and Saunders prepared m-chlorostyrene (6) by charging a flask equipped with a dropping funnel and a short fractionating column with 12.5 g. of fused, powdered KHSO4 and 0.05 g. of p-t-butylphenol (as antioxidant), heating the mixture in a bath at 220-230° at a pressure of 125 mm., and adding 145 g. of... 

The addition of trichlorotitanium 4-tcrt-butylphenolate 89 to phthalaldehyde gives the intermediate 90, which nndergoes a ring-chain tautomerism to afford the cyclic isomer 91. The latter reacts with the second molecule of 89 to yield the final product 92 via replacement of the acetalic OH group by the p-t-butylphenol moiety (equation 36). 

The rapid development of calixarene chemistry in the 1980s followed by an explosionlike development in the 1990s is due to the ease by which larger amounts of f-butyl calixarenes are available on a laboratory scale by alkali-catalysed condensation of p-t-butylphenol 1 with formaldehyde (Scheme 1). 

Industrial processes for which this kind of catalysts were originally used include the hydration of propene and the conversion of isopropanol into diisopropyl ether [36], the cleavage of ethers such as MTBE to produce pure isobutene [37] and the alkylation of phenol with isobutene and isobutene oligomers to afford p-t-butylphenol (as stabilizer for plastics) and isoalkylphenols (for detergents) (Scheme... 

Blends of enzymatically synthesized poly(bisphenol-A) and poly(p-t-butylphenol) with poly(e-caprolactone) (poly(e-CL)) were examined [84]. FT-IR analysis showed the expected strong intermolecular hydrogen bonding interaction between the phenolic polymer with poly(e-CL). A single Tg was observed for the blend, and the value increased as a function of the polymer content, indicating their good miscibility in the amorphous state. In the blend of enzymatically synthesized poly(4,4 -oxybisphenol) with poly(e-CL), both polymers were also miscible in the amorphous phase [85], The crystallinity of poly(e-CL) decreased by poly(4,4 -oxybisphenol). 

CAS 98-54-4 EINECS/ELINCS 202-679-0 Synonyms p-t-Butylphenol 4-(1,1-Dimethylethyl) phenol 1-Hydroxy-4-t-butylbenzene PTBP Empirical C H 0 Formula (CH3)3CC H,OH... 

Kalkar, K., and Roy, N. K. 1992. D5mamic mechanical properties of bisphenol-A polycarbonate/poly (p-t-butylphenol formaldehyde) blends. Polymer Science Contemporary Themes, II, Tata New Delhi McGraw-Hill.. 

Synonyms p-t-Butylphenol, phosphate (3 1) 4-(1,1-Dimethylethyl) phenol phosphate 4-(1,1-Dimethylethyl) phenol phosphate (3 1) Phenol, p-t-butyl-, phosphate (3 1) Phenol, 4-(1,1-dimethylethyl), phosphate (3 1)... 

Methyl-l-pentene sulfone Novolac Single Tg II had Mw =1.0 kg/mol and was formaldehyde and 13/17/ 70 moI% = p-t-butylphenol/ m-cresol/o-cresol or fcHmaldehyde and 15/17/68 mol % = 2-t-butylphenol/m-cresol/ o-cresol Fahrenhlotz and Kwei (1981)... 

It is well known that by forming inclusion complexes in aqueous solution with a-CD some compounds such as p-t-butylphenol show UV spectral changes almost identical to that observed when the compounds are dissolved in dioxane[10]. These results lead to a possibility... 

Foussereau MJ, Petitjean J, Barre JG (1968) Eczema aux bracelets-montres par allergie a des resines formol-p.t.butylphenol des colles pour cuir (resines du type c.k.r. 1634) Bull Soc Fr Dermatol Syphiligr 75 630-633... 

Fig. 85 Kinetic behavior of stabilized HDPE under thermal oxidation. Temperature 200°C. Environment air. Additive concentration 0.25 %. The data were taken from [03J1]. (a) CL curves recorded for high density polyethylene modifird with (1) free, (2) p-t-butylphenol, (3) / -t-butyl[4]arene, (4) / -r-butyl[6]arene. (b) changes in induction time and rate of oxidation on additive concentration, (c) changes in half-period and maximum time of oxidation on additive concentration.

Polymer Studies. General Procedure. The desired amount of BPA (generally 45.35g), sodium or potassium hydroxide, phase transfer catalyst (Aliquat 336 or tetrabutylammonium bromide), p - t-butylphenol (0.75% as a chain stopper) and methylene chloride or methylene chloride/chlorobenzene (1/3) were heated at reflux for a period of 5 hr under nitrogen. At this point the reaction mixture was diluted with methylene chloride and filtered through Celite. The mixture was then either a) poured directly into methanol to precipitate the polymer or b) split into two portions one portion was precipitated by methanol, the second was reverse precipitated using methanol/acetone. (see below)... 

Pleshkova et al. [1031] have used TD-MS to determine the composition of a number of commercial bisphenol A-based polycarbonates. PhOH, p-t-butylphenol, and p-isooctylphenol were determined as the main chain-transfer agents for these polycarbonates. Up to 10 additives with concentrations exceeding 0.05% could be determined in a sample. Mould lubricants of various chemical nature were the main additives found. 

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