Overview
Polypropylene glycols are polymers of propylene oxide. They are clear, viscous liquids with low pour points. Viscosity increases and water solubility decreases with increasing molecular weight.

PPGs can be blended to obtain liquids with intermediate viscosities. The molecular weights range from low for water-soluble to high for water-insoluble applications.

Product Cloud Point(1) Viscosity(3) Flash Point Pour Point (4) Targeted Molecular Weight Specific Gravity(5) INCI/CTFA Nomenclature

1% aqueous 10% DB(2) cSt @25°C cSt @40°C cSt @100°C ºC ºC
 g/mol
 @25°C
 --
Units ºC ºC
P400E >95 68 68 31 5 >150 -49 425 1.007 PPG-9
P600E 65 57 84 38 6 >200 -47 600 1.003 PPG-15
P1000E 21 38 143 71 11 >150 -43  1000 1.004 PPG-17
P1200E 20 32.5 160 80 13 >150 -41 1200 1.003 PPG-20
P2000E 15 20 230 143 24 >150 -31 2000 1.002 PPG-26
P4000E 9 10.1 1110 438 73 >150 -20 4000 1.004 PPG-34

1 Cloud Points: ASTM D 2024
2 10% surfactant in a solution of 25% diethylene glycol butyl ether in water
3 Viscosity: ASTM 445/446
4 Pour Point: ASTM D 97
5 Specific Gravity: ASTM D 891

Details
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