Depressants viscosity

TrialkylPhosphates. Triethyl phosphate [78-40-0] C H O P, is a colorless Hquid boiling at 209—218°C containing 17 wt % phosphoms. It may be manufactured from diethyl ether and phosphoms pentoxide via a metaphosphate intermediate (63,64). Triethyl phosphate has been used commercially as an additive for polyester laminates and in ceHulosics. In polyester resins, it functions as a viscosity depressant as weH as a flame retardant. The viscosity depressant effect of triethyl phosphate in polyester resins permits high loadings of alumina trihydrate, a fire-retardant smoke-suppressant filler (65,66). 

Recommended apphcations include transformers, insulators, bushings, wire and cable, generators, motors and switchgear, additives for adhesives, vinyl stabilization, and as viscosity depressants. 

The viscosity of PVC pastes may be reduced in many instances by the presence of certain polyethylene glycol derivatives and related materials. Because of their tendency to exude, the use of these viscosity depressants should be restricted to levels of less than 1% of the total mix. 

P.V.C. plastisols P.V.C. plastisols are liquids which contain little or no solvent/diluent. They consist of a blend of polyvinyl chloride (p.v.c.) resins, plasticisers, stabilisers, viscosity depressants, pigments and sometimes fillers. 

Deodorants - Odorants - Fragrances Detackifiers - Antitack agents Diluents - Viscosity depressants Dispersants... 

Phosphate esters (alkyl or aryl, or mixed) of phosphoric acid constitute an important family of organophosphorus flame retardants.25 Triethylphosphate, a colorless liquid boiling between 209°C and 218°C, and containing 17 wt % phosphorus, has been used commercially as an additive for polyester resins/laminates and in cellulosics. In polyester resins, it functions as a viscosity depressant as well as a flame retardant. Trioctylphosphate is employed as a speciality flame-retardant plasticizer for vinyl composites where low temperature flexibility is critical. It can be also included in blends, along with general purpose plasticizers, such as phthalate esters, to improve low temperature flexibility. 

Can be used as a nonionic emulsifier or coupling agent. It is used as a defoaraer in water base coatings, a viscosity depressant in vinyl plastisols, a viscosity control additive in hair rinse formulations, and as a paper softener. 

Coating, ink, paint, and adhesive ingredient. Reactive diluent and viscosity depressant in epoxy formulations. 

Processing aids - additives such as viscosity depressants, mold-release agents, emulsifiers, lubricants, and anti-blocking agents (3). 

The use of filler polymers in increasing quantities in PVC paste technology is an extension of this principle. These filler polymers are made by suspension (granular, dispersion) polymerization and by themselves the particles are too large to make stable pastes. Flowever, in the presence of much smaller paste polymer particles they remain in stable suspension. As shown in Figure 4.6, the replacement in space of a mixture of paste-polymer particles and plasticizer by a large granular polymer particle releases plasticizer which then acts as a lubricant, i.e., a viscosity depressant. 

BBP - benzyl butyl phthalate DOP - dioctyl phthalate, DINP - diisononyl phthalate VD - viscosity depressant... 

Dimethyl methylphosphonate viscosity depressant, cellulosics Triethyl phosphate... 

Presence of additives or fillers. Common fillers tend to absorb the plasticizer causing viscosity increase. Magnesium sihcates or fumed sihca are usually employed to impart xotropy of pastes. Various organic hquids with a low solvating power (e.g., paraffins) are employed as viscosity depressants. 

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