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| | Thickening agents - Patent 4971722 |
 | | The thickening agent according to claim 1, wherein n=40 to 80, R.sub.1 is a hydrocarbon residue with 10 to 22 carbon atoms, R.sub.2 is an alkyl residue with 8 to 30 carbon atoms, p=1 to 3, and m=0. |
 | | The thickening agent according to claim 5, wherein said molar ratio of ethylene oxide to propylene oxide is approximately 50:50 to 90:10, 60 to 120 moles of alkylene oxide are used per mole of alcohol, and the resulting polyether is reacted with said diisocyanate in a molar ratio of 1:0.5 to 1:0.25. |
 | | Although numerous thickening agents based on polyethers are already known, a need still exists for improved thickening agents, especially for such which exhibit the said disadvantages not at all or only to a reduced extent. |
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