Back to results
US 9,139,684 B2Granted
Carboxybetaine-functionalized diols and zwitterionic polyurethane hydrogels derived therefrom
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsPeter N. Coneski, James H Wynne
Life of this patent
Estimating the term…
Abstract
A compound having the formula: X−N+(CH3)(CH2CH2OH)2[(CH2)n—COO—R1] and a polymer having the repeat unit: X−{—OCH2CH2—N+(CH3)[(CH2)n—CO—Y]—CH2CH2O—CO—NH—R2—NH—CO—}. R1 is an ester protecting group, R2 is an organic group, X is a halide, and n is a positive integer. Each Y is O−Z+ or O—R1, where Z+ is a cation from an aqueous base. A method of reacting N-methyldiethanolamine with an ω-halo-n-alkanoate ester to form the above compound.
Claims21
A polymer comprising the repeat unit:
- X−{—OCH2CH2—N+(CH3)[(CH2)n—CO—Y]—CH2CH2O—CO—NH—R2—NH—CO—};
- wherein n is a positive integer;
- wherein X−is a halide;
- wherein each Y is independently selected from O31 Z+and O—R1;
- wherein Z+is a cation from an aqueous base;
- wherein R1 is an ester protecting group;
- and
- wherein R2 is an organic group.
5 more elements
A method comprising:
- reacting N-methyldiethanolamine with an ω-halo-n-alkanoate ester to form a compound having the formula:
- X−N+(CH3)(CH2CH2OH)2[(CH2)n—COO—R1];
- wherein n is a positive integer;
- wherein X−is a halide;
- and
- wherein R1 is an ester protecting group;
- and
- reacting the compound with a polyisocyanate having the formula OCN—R2—NCO to form a polymer comprising the repeat unit:
- X−{—OCH2CH2—N+(CH3)[(CH2)n—COO—R1]—CH2CH2O—CO—NH—R2—NH—R2—NH—CO—};
- wherein R2 is an organic group.
7 more elements
Dependencies are inferred from the claim text.