Tertiary butyl phenol

The ether-catalyst complex (II) splits into a complex anion (III) and a carbonium ion (IV), which rearranges to the configuration of maximum stability (V). This carbonium ion (V) could itself initiate polymerisation, but it is more likely that it attacks the double bond of the closely associated anion (III), giving the double ion (VI) in equilibrium with the aldehyde (VII). Rearrangements of the type (I)-(VII) have been observed for vinyl ethers [7], and a closely parallel isomerisation is that of isobutyl phenyl ether into para-tertiary butyl phenol under the influence of A1C13 [8]. It is unlikely that the steps from (II) to (VI) take place in a well defined succession. The process probably proceeds by a single intramolecular transformation. 

Experiments with a maximum bubble pressure and a drop volume set-up were performed with aqueous solutions of an oxyethylated para-tertiary butyl phenol with 10 EO-groups, pt-BPh-EOIO (synthesised and purified by Dr. G. Czichocki, Max-Planck-Institut fur Kolloid- und Grenzflachenforschung Berlin). The dynamic surface tension of a 0.025 mol/1 solution of pt-BPh-EOlO is shown in Fig. 5.30. 

Application The Snamprogetti Cracking Technology allows producing high-purity isobutylene, which can be used as monomer for elastomers (polyisobutylene, butyl rubber) and/or as an intermediate for the production of chemicals—MMA, tertiary-butyl phenols, tertiary-butyl amines, etc. 

Several higher homologs of phenol such as p-tertiary butyl phenol, p-tertiary amyl phenol and p-tertiary octyl-phenol are used to make oil-soluble phenolic resins for varnishes and other coatings systems. What structural features of these compounds make oil solubility of the resins possible ... 

In the THM-GC profile of the printing ink resin,dimethyl fumarate (peak 6) is detected, suggesting the presence of maleic or fumaric acid. Pentaerythritol is indicated by the presence of the tetra- and trimethyl ethers (peaks 7 and 8, respectively). Tertiary butyl phenol and methyl and dimethyl tertiary butyl phenols are detected as their methyl ethers (peaks 9, 10, and 11, respectively). Rosin acid methyl esters are detected with dehydroabietic acid and abietic acid methyl esters predominating (peaks 15 and 16, respectively). This resin is therefore diagnosed... 

Among the tertiary-butyl phenols, the o- and p-derivatives and 2,6-di-tert-butylphenol are commerically important. They are used in the production of antioxidants. o-tert-Butylphenol and 2,6-di-tert-butylphenol are produced by alkylation of phenol with isobutene at a reaction temperature of 100 °C in the presence of aluminum phenolate as catalyst. 

Octyl phenol (tertiary) Phenol used as an alternative to tertiary butyl phenol in the manufacture of pure oil-reactive phenolic resins See image). 

Para-tertiary-buty pheno formaldehyde resin (PTBP-F-R) is a polycondensate of para-tertiary-butylphenol and formaldehyde. Major occupational sources are neoprene glues and adhesives in industry, in the shoemaking and leather industry or in car production. It is also used as a box preservative in box and furniture manufacture, and in the production of casting moulds, car-brake linings, insulated electrical cables, adhesives, printing inks and paper laminates. Para-tertiary-butyl-phenol is the sensitizer. 

Heat-reactive tertiary butyl phenolic resin 30... 

The most commonly known phenolic composite group is phenol formaldehyde polymers (phenoplasts). They are produced by polycondensation of a phenol and a mixture of phenols (phenol and phenol derivatives like cresol-resorcinol or para tertiary butyl phenol) with an aldehyde, usually formaldehyde and hexamethylene tetramine. Reaction of formaldehyde with phenol (up to 3 moles of formaldehyde can react with one mole of phenol - phenol acts as a three functional monomer) yields methylol groups in the ortho and para positions of the phenol molecule. In a further reaction, the methylol groups condenses with another molecule of phenol to form a methylene bridge. In practice, a prepolymer (usually a powder) is prepared first which is then cured later to the shape of the article in the mould. 

These dithiophosphates are mainly comprised of decane, tertiary butyl, and hydrogenation tertiary butyl phenol dithiophosphates, as well as naphthols with two rings. They usually have a strong frothing capability, but no selectivity and collecting capability. 

Materials. The polymers used were ABS blended with bisphenol A/phosgen resin terminated with p-tertiary butyl phenol (ABSPC), a blend of modified PC (minimum 70%), bisphenol A PC (maximum 30%), and n thylene chloride (less than 3 ppm) (PC), unfilled PP (UPP), and PP filled with 30% glassfiber and mineral (FPP). All materials were injection molded into 0.3x3.2x7.2 cm plaques with the mold gated at the center of the 3.2 cm side. Test specimens were machined fi om these plaques. The lower specimen was 0.3x1.6x7.2 cm while the upper specimen was 0.3x0.64x0.64 cm. The upper specimen had a hemispherical cavity msK hined in the upper surfoce to form a self aligning bearing with the loading bail which transmitted the normal load to the interfoce and the fiction force to a transducer. 

Tertiary butyl phenol is produced from the catalytic alkylation of phenol with olefin feedstocks from petroleum cracking, Figure 11.38. 

Also acetylene Is reacted with tertiary butyl phenol in the production of acetylene phenol tacklfylng resin. 

Fig. 5. Magnesia and tertiary butyl phenolic interaction with polymer acid. (The resin should be added before or at the same time as the MgO to prevent gelation during mixing.)...

Various tertiary butyl phenols followed. Below is an example of the structures of the form. OH OH... 

Addition of resins to solvent-borne polychloroprene adhesives serves to improve specific adhesion, increases tack retention, and increases hot cohesive strength. Para-tertiary butyl phenolic resins are the most common and amounts between 35 and 50 phr are generally added. In general, tack increases by increasing the phenolic resin content in the polychloroprene adhesive, and bond strength reaches a maximum at about 40 phr, decreasing for high amounts of phenolic resin. 

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