Superhydrophilic amphiphilic copolymers and processes for making the same
AssigneeAkzo Nobel Chemicals International B.V.
InventorsJoseph B. GARDNER, Michael J. FEVOLA, Frank C. SUN, Russel M. WALTERS
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Abstract
A superhydrophilic amphiphilic copolymer and process for making the superhydrophilic amphiphilic copolymer includes a low molecular weight polysaccharide modified with a hydrophobic reagent, such as substituted succinic anhydride. The superhydrophilic amphiphilic copolymer system generates stable foam for use in applications, such as healthcare formulations, with low irritation of the eyes and skin.
Claims22
A superhydrophilic amphiphilic copolymer comprising a starch-based or cellulose-based polysaccharide modified with one or more hydrophobic reagents wherein the one or more hydrophobic reagents is a long-chain quaternary ammonium compound having at least one chain containing 6 or more carbon atoms;
- a 1,2-epoxyalkane;
- a monoalkyl ester;
- an alkyl chloride;
- or combinations thereof.
A process for making a superhydrophilic amphiphilic copolymer solution comprising:
- dissolving a starch-based or cellulose-based polysaccharide in water to form an aqueous solution;
- adjusting the pH of the aqueous solution;
- reacting one or more hydrophobic reagents, wherein the one or more hydrophobic reagents is:
- a long-chain quaternary ammonium compound having at least one chain containing 6 or more carbon atoms:
- a 1,2-epoxyalkane:
- a monoalkyl ester:
- an alkyl chloride:
- or combinations thereof, with the polysaccharide in the aqueous solution;
- cooling the resulting copolymer solution;
- and
- neutralizing the copolymer solution.
Dependencies are inferred from the claim text.