Aqueous solution and dispersion of an acid salt of a polyetheramine
AssigneeThe Dow Chemical Company
InventorDale C. Schmidt
Life of this patent
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Abstract
A solution and a stable aqueous dispersion of an acid salt of a polyetheramine can be prepared by at least partially neutralizing the polyetheranine with an acid. The solution and dispersion are useful as a coating, particularly in applications where it is desirable to have a barrier against small molecules.
Claims17
A composition comprising a stable aqueous dispersion of an acid salt of a polyetheramine having structural units represented by the formula:
- where R1 is independently in each occurrence hydrogen or C1-C12 alkyl;
- Y is a hydrocarbylene moiety and X is
- where R2is independently in each occurrence C2-C20 hydrocarbylene;
- Z is independently in each occurrence H, alkylamido, hydroxyl, alkoxy, alkylcarbonyl, aryloxy, arylcarbonyl, halo, or cyano.
A method of preparing a stable aqueous dispersion of an acid salt of a polyetheramine comprising the step of contacting the polyetheramine with water and an acid under pressure and at a temperature of not less than about 110° C. to not greater than about 200° C. to form the stable aqueous dispersion, where the polyetheramine has structural units represented by the following formula:
- where R1 is independently in each occurrence hydrogen or C1-C12 alkyl;
- Y is a hydrocarbylene moiety;
- and X is
- R2 is independently in each occurrence C2-C20 hydrocarbylene;
- Z is independently in each occurrence H, alkylamido, hydroxyl, alkoxy, alkylcarbonyl, aryloxy, arylcarbonyl, halo, or cyano.
A composition comprising a stable aqueous dispersion of an acid salt of a polyetheramine having structural units represented by the formula:
- where R1 is independently in each occurrence H or methyl;
- Y is 4,4′-bisphenylene, 4,4′-isopropylidenediphenylene, 1,2-phenylene, 1,3-phenylene, or 1,4-phenylene;
- and R2 is independently in each occurrence C2-C6 linear or branched alkylene, wherein not less than 30 percent and not more than 70 percent of the nitrogen atoms in the polyetheramine are protonated.
Dependencies are inferred from the claim text.