Maryland's Defense Patent Database

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Carboxybetaine-functionalized diols and zwitterionic polyurethane hydrogels derived therefrom

Patent image
NRL

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.

Inventors: 
Coneski, Peter N.; Wynne, James H.
Patent Number: 
Technical domain: 
Materials and Coatings
FIle Date: 
2013-03-04
Grant Date: 
2015-09-22
Grant time: 
932 days
Grant time percentile rank: 
17
Claim count percentile rank: 
6
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY