We manufacture Propylene Glycol, Dipropylene Glycol, and Poly-Chill Fluid.
Dipropylene Glycol
• Solvent: Dipropylene glycol as a solvent is a component of hydraulic brake fluids, cutting oils and
textile lubricants. It is an excellent solvent for inks, especially the steam-set type, and for those used in
printing food packages where the absence of residual taste and odor is essential. A mixture of
dipropylene glycol and diethylene glycol is used as an extraction solvent for separating high purity
aromatics from hydrocarbons. Dipropylene glycol is a solvent for nitrocellulose and a partial solvent for
cellulose acetate.
• Chemical Intermediate: Dipropylene glycol is a dihydroxy alcohol and undergoes reactions typical
of this type of compound. Of greatest commercial importance are the reactions in which various ether
and ester derivatives are formed. Dipropylene glycol diesters prepared by the reaction of dipropylene
glycol and acids can be used as plasticizers, fuel additives, resins and components of paints and
cosmetics. A particularly important reaction of dipropylene glycol is with unsaturated dibasic acids,
such as maleic acid or fumaric acid. The resulting unsaturated polyester resins can then be
cross-linked with styrene.
• Polyester Resins: The polyester resins prepared from dipropylene glycol tend to be more flexible
and less crystalline than those prepared from ethylene glycol. Dipropylene glycol polyesters are not
so sensitive to water as the diethylene glycol polyesters. Urethanes which range from touch rubbery
plastics to foams are synthesized from diisocyanates and polyesters containing dipropylene glycol.
The properties of the urethanes are determined by the proportions of acid and glycol used in the
preparation of the polyester component. The urethanes have end uses as adhesives, elastomers,
foams, molding compounds and surface coatings.
• Other Uses: Dipropylene glycol has been used as a heat transfer fluid for both low and high
temperature applications. It is used as a high temperature reaction medium in the synthesis of
certain pharmaceuticals, and also as an antifreeze. Dipropylene glycol has germicidal properties
and can be used as an air purification agent.
Poly-Chill Fluid
Poly-Chill fluid is authorized by USDA for use in Federally inspected meat and poultry plants.
Aqueous solutions are widely used in the immersion freezing of plastic-wrapped poultry. The freezing bath temperature is generally maintained at -18C (0F) to freeze the poultry to a depth of 3/8 to 1/2 inch in 30 minutes. Freezing of the poultry is completed in a freezing room as a separate operation.
Food products such as fish, meat and vegetables are normally frozen by exposure to high velocity air that is prechilled by contact with cooling coils. Poly-Chill fluid is continuously sprayed over the coils to prevent formation of frost or ice that would otherwise result from condensation of moisture from the air. The resulting diluted glycol can be reconcentrated for reuse.
As solar technology has developed, aqueous solutions of propylene glycol have received wide acceptance as a heat-transfer fluid in areas where freezing is a problem. The aqueous glycol solutions provide freeze protection. In this application, the use of Poly-Chill fluid is particularly advantageous in that the inhibitor provides corrosion protection. The inhibitor concentration must be monitored periodically to ensure corrosion protection.
