Polypropylene Glycols (PPG) :
[Manufactured by: The Dow Chemicals Co, USA]

Polypropylene Glycols are polymers of propylene oxide. They are clear, viscous liquids with low pour points. PPGs are available in different molecular weights i.e. PPG - 425 / 1000 / 2000 / 4000. These are available in packing of 210 kgs nett per drum.

Dow produces several polyglycols that are useful as both antifoaming and defoaming agents. As antifoaming agents, these products are added to aqueous systems to prevent the formation of foam. If foam has already formed, they can be used to eliminate it.

DOW Polypropylene Glycols (PPGs) are:

  • 100% active liquids
  • compatible with a wide range of processes
  • inert and stable foam control agents
  • low in toxicity o non-corrosive
  • nonionic o pH stable
  • water insoluble with low surface tension, so they spread quickly across a liquid surface

Polypropylene Glycols are used as chemical intermediates in a wide range of industries. All DOW Polypropylene Glycols have one or more terminal hydroxy groups which can be further reacted to modify the properties of a final product. Polypropylene Glycols are water soluble at low molecular weights (P425), but most of the product line is considered sparingly soluble in water. They are liquids down to very low temperatures, such as 35°C. The secondary hydroxy group of Polypropylene Glycols is not as reactive as the primary hydroxy group of Polyethylene Glycols

DOW Polypropylene Glycols are used in a variety of applications. They offer a wide range of hydrophile-lipophile balances and molecular weights, expanding formulating possibilities. When used as functional fluids, they offer excellent lubricity and solvency.

PPG 2000 is used extensively in silicone oil based defoamers. PPG 2000 is used to dilute silicone oil based defoamers. Use of PPG 2000 has synergistic effects and also it reduces the cost of defoamer thus making it more cost effective.

Polypropylene Glycols are excellent candidates for synthetic lubricants. They provide natural lubricity, a low pour point, additive compatibility, and lack of varnish or coke formation.

 
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