Pentaerythritol characteristics

Titanium dioxide pigment coated with pentaerythritol, trimethylolpropane, or trim ethyl ol eth an e exhibits improved dispersion characteristics when used in paint or plastics formulations. The polyol is generally added at levels of 0.1—0.5% (96). 

Between World War I and II, TNT replaced picric acid as the explosive of choice in munitions. It was also mixed with other compounds to produce more powerful explosives with unique characteristics. Amatol is a mixture containing between 40% and 80% ammonium nitrate and TNT. Pentolite is a mixture of PETN (pentaerythritol tetranitrate) and TNT. Another common explosive mixture is RDX (cyclotrimethylenetrinitramine) and TNT. RDX is an abbreviation for Royal Demolition Explosive. 

In a search for a greater variety and more effective desensitizers, a study was undertaken to investigate commercially available synthetic waxes (Ref 26). The study was primarily to determine the effects of these inert materials on the stability and expl characteristics of the more sensitive expls. Of 17 materials examined, the following four were found promising in rendering PETN less sensitive 90/10 Aristowax/Alox 600 Aristowax 150-5 Beeswax substitute 776 Pentawax 177 (85/15 pentaerythritol/dipenta-erythritol hexastearate)... 

A study of the kinetics of thermal decomposition reactions using pentaerythritol tetranitrate(PETN), a high explosive, as the model substance was first conducted by SC-DSC. In this study, information was obtained that was relative to the characteristics of the DSC technique. However, the question as to how the results of analyses of this type were useful for practical work arose, and studies in this area were stopped. Subsequently, studies have proceeded on the evaluation of hazards by collecting as much data on self-reactive substances as possible. 

The effect of irradiation dose and different polyfunctional monomers(PFMs) at a constant ratio of 10 phr on the physicochemical properties of a PVC formulation used as wire coating was investigated. The PFMs used were trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethylene glycol dimethacrylate, diethylene glycol diacrylate, pentaerythritol tetraacrylate, triallyl cyanurate and 1,6-hexanediol diacrylate. The properties studied included tensile properties at room and elevated temps., softening temp., swelling characteristics and volume resistivity. 18 refs. 

Pentaerythritol (PE, nitration grade". According to Biazzi SA 18 PI should possess the following characteristics ... 

ACM compounds are difficult to process and processing aids must be used, e.g., stearic acid, zinc soaps, fatty alcohol residues, octadecylamine, or pentaerythritol tetrastearate. This later processing aid does not affect vulcanization characteristics, whereas the others retard or accelerate vulcanization. 

A solid phosphite anti-oxidant has been developed, introduced by GE Specialty Chemicals, in its Ultranox range. Designed to meet the demand for a high-activity stabilizer with superior hydrocarbon stability and Improved handling characteristics, it is based on butyl ethyl propane diol chemistry, rather than the usual pentaerythritol. It has been granted FDA approval for food contact in certain applications and is expected to find applications in polyolefins, styrenics. PVC, engineering thermoplastics, elastomers, and adhesives. 

Trifimctional acrylates, such as Sartomer SR534, have been found to provide reversion-resistant protection (52). Test results of the three trifunctional acrylate and methacrylate monomers, pentaerythritol triacrylate, trimethylolpropane trimethacrylate, and trimethylolpropane triacrylate, versus BCI-MX prove interesting (53). Rheometer traces of cure development and reversion characteristics with these trifimctional monomers duplicated BCI-MX behavior even to the point of having initial reversion chemistry occurring before they became active. This would suggest these materials operate by the same mechanism as BCI-MX. 

Pentaerythritol — (i) Chemical Designations — Synonyms Mono PE PE Pentaerythrite Pentek Tetrahydroxyniethylmethane Tetrakis (Hydroxymethyl) methane Tetramethylolmethane Chemical Formub C(CHjOH)4 (ii) Observable Characteristics — Physical State (as shipped) Solid Color White Odor None (iii) Physical and Chemical Properties — Physical... 

May et al. [848] has discriminated 31 household gloss paints (basically pentaerythritol-o-phthalate alkyds) by means of PylR and six other common techniques. All the paints gave spectra characteristic of an alkyd paint incorporating phthalic anhydride as the dibasic acid. PylR is largely insensitive to pigment variations. For characterisation of... 

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