Alkaline suspending systems constructed from hydrotropes and amines
AssigneeStepan Company
InventorsJohn Hawkins, George Forrest, Andrew Marsden
Life of this patent
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Abstract
Non-settling aqueous-based pourable alkaline suspensions may be prepared from mixtures of at least one water soluble amphiphile and at least one oil soluble amphiphile, wherein the amphiphiles have from 6 to 11 carbon atoms in the hydrophobic portion of the amphiphile. The water soluble amphiphiles are classed as hydrotropes, and the oil soluble amphiphile component contains at least one amine group.
Claims19
An alkaline structured aqueous system having a yield point and capable of suspending particles of solid, liquid or gas, the structured aqueous system comprising:
- (a) from 2% to 50% by weight based on the weight of the structured aqueous system of a mixture of at least one water soluble amphiphile and at least one water insoluble amphiphile containing at least one amine group, wherein the at least one water soluble amphiphile is a hydrotrope comprising at least one polar head group and a lipophilic tail group with from 6 to 11 carbon atoms per polar head group, and (b) water to total 100% of the structured aqueous system.
A composition comprising:
- (a) a structured aqueous system comprising from 2% to 50% by weight based on the weight of the structured aqueous system of a mixture of at least one water soluble amphiphile and at least one water insoluble amphiphile containing at least one amine group, wherein the at least one water soluble amphiphile is a hydrotrope comprising at least one polar head group and a lipophilic tail group with from 6 to 11 carbon atoms per polar head group;
- (b) at least one of solid, liquid, or gaseous particles suspended in the structured aqueous system;
- and
- (c) water to total 100% of the composition.
A method of preparing a stable graphene dispersion comprising:
- (a) forming an alkaline structured aqueous system comprising water and from 2% to 50% by weight based on the weight of the structured aqueous system of a mixture of at least one water soluble amphiphile and at least one water insoluble amphiphile containing at least one amine group, wherein the at least one water soluble amphiphile is a hydrotrope comprising at least one polar head group and a lipophilic tail group with from 6 to 11 carbon atoms per polar head group;
- and
- (b) suspending graphene particles in the alkaline structured aqueous system to form the stable graphene dispersion.
Dependencies are inferred from the claim text.