Dibutyl phthalate plasticiser

M o no metho xy trityl Dibutyl phthalate (plasticiser) Dibutyl phthalate (plasticiser) Dibutyl phthalate (plasticiser) Erucamide... 

Comparison of Table 5.4 and 5.7 allows the prediction that aromatic oils will be plasticisers for natural rubber, that dibutyl phthalate will plasticise poly(methyl methacrylate), that tritolyl phosphate will plasticise nitrile rubbers, that dibenzyl ether will plasticise poly(vinylidene chloride) and that dimethyl phthalate will plasticise cellulose diacetate. These predictions are found to be correct. What is not predictable is that camphor should be an effective plasticiser for cellulose nitrate. It would seem that this crystalline material, which has to be dispersed into the polymer with the aid of liquids such as ethyl alcohol, is only compatible with the polymer because of some specific interaction between the carbonyl group present in the camphor with some group in the cellulose nitrate. 

Plasticisers are sometimes added to the polymer, dibutyl phthalate being commonly employed in quantities of the order of 5%. Use in moulding powders will enhance the melt flow but somewhat reduce the mechanical properties of the finished product. 

In some moulding compositions other special purpose ingredients may be incorporated. For example, naphthalene, furfural and dibutyl phthalate are occasionally used as plasticisers or more strictly as flow promoters. They are particularly useful where powders with a low moulding shrinkage are required. In such formulations a highly condensed resin is used so that there will be less reaction, and hence less shrinkage, during cure. The plasticiser is incorporated to... 

The hydrohalide is liable to dehydrochlorination, particularly when moist acid is used in its preparation, so that hydrochloric acid acceptors such as lead carbonate are useful stabilisers. Dibutyl phthalate and tritolyl phosphate are effective plasticisers. Rubber hydrochloride is used as a packaging film (Pliofilm) and as a rubber-to-metal bonding agent (e.g. Typly). 

Abbreviation for dibutyl phthalate, a plasticiser for natural and synthetic rubbers. 

Dibutyl phthalate xylen (DPX), also known as Distrene plasticiser (sets hard)... 

These are dispersants (e.g., amines, fatty acids, polycarboxylic acids), binders (e.g., wax polyacrylate, polyvinyl alcohol), plasticisers (e.g., stearic acids, dibutyl phthalate, polyethylene glycol) and solvents (e.g., water, organics) [244-250]. They are needed to prepare a suitable suspension or slurry for the subsequent shaping step. They must evaporate during a presintering treatment without causing failures (Table 9). Suspensions as well as slurries should have an uniform distribution of the Si3N4 particles, adequate viscosity, and no... 

Epoxy resins produced by the reaction of bisphenol A and epichloro-hydrin are versatile polymers with several useful properties (subsection 2.2.2.1). However, one significant weakness is their brittle nature. Incorporation of plasticisers is not very useful. Dibutyl phthalate is an exception, showing good compatibility but offering only limited ability to flexibilise the resin. Moreover, plasticisers affect the mechanical properties and chemical resistance of the cured system. With polyurethanes it is possible to complement the flexibility of the epoxy system. Numerous attempts have been made to combine the two types to achieve beneficial modifications (Lee and Nivelle, 1967). These modifications proved successful under high-temperature cure but inferior results were obtained for ambient cures. 

In spite of their high volatility and water extractability, dibutyl phthalate and di-isobutyl phthalate continue to be used in PVC. They are efficient plasticisers and their limitations are of greatest significance in thin sheet. 

Another test for phthalates involves polarography (Whitnack and Ganz, 1953). The plasticiser is mixed with tetramethyl ammonium chloride and diluted with methanol. After removal of oxygen the solution is polarographed over the range -1.0 to -2.0 V. Dibutyl phthalate is reduced at about-1.45 V. Dimethyl, dihexyl, dioctyl and dinonyl phthalates are reduced at about -1.5 V. 

Some) Phthalates Dibutyl Butylbenzyl phthalates Plasticisers used with plastics... 

C P Hall markets butyl benzyl phthalate as a general-purpose plasticiser under the name Plasthall BBP. It is said to reduce the melt viscosity of calendered or extruded PVC considerably, and it competes with dibutyl phthalate, mainly because it is less volatile and more extraction resistant, although it is not as resistant as the higher molecular weight plasticisers. 

The application fields of plasticisers range from automobiles and construction to toys and medical products. Phthalate plasticisers such as dibutyl phthalate and di(2-ethylhexyl) phthalate are widely used due to the higher plasticising efficiency and lower volatility of these phthalate plasticisers. Phthalate plasticisers are still widely used in the processing of flexible PVC [29]. However, recently, the use of phthalate plasticisers has been questioned due to their debatable toxicity in consumer products made of PVC matrices, especially in blood supply and similar medical plastics, because the content of... 

Hardeners such as amines and anhydrides include many sensitizers. See the sections on epoxy, acrylate and and urethane resins. Triethylamine may irritate and sensitize (Bittersohl and Heberer 1978). Benzoyl peroxide, p-methoxy phenol and hydroquinone are used as accelerators and inhibitors of polymerization (see the chapters on epoxy resin compounds and acrylics in this book). Of the other additives, dioctyl sodium sulfosuccinatey a surfactant, is a potential, rare sensitizer (Fischer 1986), as are dibutyl phthalate and triphenyl phosphate, used as plasticisers (Hjorth 1964). 

Dibutyl phthalate, 5% petrolatum (plasticiser in resin systems)... 

Toluene-2,4-diisocyanate, 1% pet (polyurethane finishes 0.1% pet may lead to false-negative results) Dibutyl phthalate, 5% pet (plasticiser in finishes) Tricresyl phosphate, 5% pet (plasticiser in finishes) Additional dyes, 1% pet (depends on individual cases ... 

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