EO/PO Random Copolymers

SYNALOX™ Water Soluble Lubricant Base Stocks are random copolymers of ethylene oxide and propylene oxide. This family of polyglycols is soluble in cold water, but exhibits inverse solubility at high temperatures. Water based solutions provide low surface tension, good wetting and good penetration characteristics, while also exhibiting low foaming properties. Water soluble SYNALOX™ Fluids are extensively used in formulations for chemical fiber spin finishes and industrial lubricants. For example, SYNALOX™ 50-30B and SYNALOX™ 50-50B are key base stocks for spin finish lubricants in the production of textured polyester and nylon yarns. Dow offers an extensive viscosity range of water soluble SYNALOX™ Fluid grades from ISOVG 22 to 1000.

SYNALOX™ Water Soluble Lubricant Base Stocks†
Property Molecular Weight Viscosity @ 40°C Viscosity @ 100°C ISO Viscosity Grade Viscosity Index
Unit g/mole CSt cSt  
Test Method  †† ASTM D445/446 ASTM D445/446 ISO 3448 ASTM D2270
50-15B 500 20 4.8 22 172
50-30B 1000 50 11 46 211
50-50B 1300 78 15 - 218
55-70B 1600 100 20 100 225
50-100B 1900 140 27 150 230
40-D150 1900 220 39 220 240
40-D220 2500 320 58 320 250
40-D300 3400 460 78 460 252
40-D700 5300 1050 178 1000 289


†Table contains typical properties, not to be construed as specifications
††Molecular weight was determined by gel permeation chromatography.
®™* Trademark of The Dow Chemical Company ("Dow") or an affiliated company of Dow