CPC C08G 18/2825 (2013.01) [A61K 8/87 (2013.01); A61Q 5/12 (2013.01); C08G 18/227 (2013.01); C08G 18/4833 (2013.01); C08G 18/71 (2013.01); C08G 18/755 (2013.01); C08G 18/7621 (2013.01); C08K 5/19 (2013.01); C11D 3/0015 (2013.01); C11D 11/0017 (2013.01); A61K 2800/48 (2013.01)] | 17 Claims |
1. A thickening agent, comprising:
I. a compound prepared by reaction of compounds (A), (B), and (C), wherein said compounds (A), (B), and (C) are free of any diisocyanate compound, and wherein:
(A) is at least one monoisocyanate compound chosen from:
(A1) a compound comprising a single isocyanate group and
(A2) at least one monoisocyanate compound from a separate reaction of (A2-1) at least one compound comprising a labile hydrogen atom and (A2-2) at least one asymmetric diisocyanate compound,
(B) is at least one isocyanate compound comprising more than 2 isocyanate groups, and
(C) is at least one compound of formula (I):
(HO)-Ln-(OH) (I)
wherein L independently represents a polyalkylene glycol residue and n represents a number ranging from 40 to 400; and
II. a solvent which is non-aromatic, non-reactive with the isocyanate group and at least one selected from the group consisting of a ketone, an ether, an aprotic ethyl derivative, a diether, a crown ether, an ester, a diester, a carbonate, a furan, a halogenated solvent, an alkane, an alkene, an alkyne, a nitrogenous or sulphurous solvent, a mineral oil and a silicone oil.
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