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  2. Polypropylene glycol - Wikipedia

    en.wikipedia.org/wiki/Polypropylene_glycol

    Polypropylene glycol is produced by ring-opening polymerization of propylene oxide. The initiator is an alcohol and the catalyst a base, usually potassium hydroxide. When the initiator is ethylene glycol or water the polymer is linear. With a multifunctional initiator like glycerine, pentaerythritol or sorbitol the polymer branches out ...

  3. Ethylene glycol - Wikipedia

    en.wikipedia.org/wiki/Ethylene_glycol

    There is a difference in the mixing ratio, depending on whether it is ethylene glycol or propylene glycol. For ethylene glycol, the mixing ratios are typically 30/70 and 35/65, whereas the propylene glycol mixing ratios are typically 35/65 and 40/60. It is important that the mixture be frost-proof at the lowest operating temperature. [24]

  4. Polyethylene glycol - Wikipedia

    en.wikipedia.org/wiki/Polyethylene_glycol

    Polyethylene glycol is also commonly used as a polar stationary phase for gas chromatography, as well as a heat transfer fluid in electronic testers. PEG is frequently used to preserve waterlogged wood and other organic artifacts that have been salvaged from underwater archaeological contexts, as was the case with the warship Vasa in Stockholm ...

  5. Propylene glycol - Wikipedia

    en.wikipedia.org/wiki/Propylene_glycol

    Estimates on the prevalence of propylene glycol allergy range from 0.8% (10% propylene glycol in aqueous solution) to 3.5% (30% propylene glycol in aqueous solution). [ 70 ] [ 71 ] [ 72 ] The North American Contact Dermatitis Group (NACDG) data from 1996 to 2006 showed that the most common site for propylene glycol contact dermatitis was the ...

  6. Polyol - Wikipedia

    en.wikipedia.org/wiki/Polyol

    Polyols may be classified according to their chemistry. [5] Some of these chemistries are polyether, polyester, [6] polycarbonate [7] [8] and also acrylic polyols. [9] [10] Polyether polyols may be further subdivided and classified as polyethylene oxide or polyethylene glycol (PEG), polypropylene glycol (PPG) and Polytetrahydrofuran or PTMEG.

  7. Cosolvent - Wikipedia

    en.wikipedia.org/wiki/Cosolvent

    The most pervasive is the application of non-toxic cosolvents with water to produce formulations that can dissolve hydrophobic molecules while maintaining cohesion with biological systems. Common cosolvents for this purpose are ethanol, propylene glycol, glycerine, glycofural, and polyethylene glycols. [7]

  8. Petrochemical - Wikipedia

    en.wikipedia.org/wiki/Petrochemical

    Chemicals produced from propylene. propyleneused as a monomer and a chemical feedstock isopropyl alcohol – 2-propanol; often used as a solvent or rubbing alcohol; acrylonitrile – useful as a monomer in forming Orlon, ABS; polypropylene – polymerized propylene; propylene oxide [12] polyether polyol – used in the production of ...

  9. Glycol ethers - Wikipedia

    en.wikipedia.org/wiki/Glycol_ethers

    Glycol ethers are designated "E-series" or "P-series" for those made from ethylene oxide or propylene oxide, respectively.Typically, E-series glycol ethers are found in pharmaceuticals, sunscreens, cosmetics, inks, dyes and water-based paints, while P-series glycol ethers are used in degreasers, cleaners, aerosol paints and adhesives.

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