Hydrophilic cross-linked polymeric membranes and sorbents
AssigneeThe United States of America as represented by the Admin. of Environmental Prot. Agcy
InventorsLeland Vane, Ravi Ponangi, Vasudevan Namboodiri
Life of this patent
Estimating the term…
Abstract
Hydrophilic cross-linked polymeric membranes, when prepared according to the process of the present invention, are unique in character in as much as the steady state permeability of the membrane has been altered by blending and cross-linking polyalkyl amines and polyalcohols. To obtain desired results, the compositions must contain at least 10% polyalkyl amines, with preferred amounts of polyalkyl amines in the composition being in excess of 40%, with over 50% polyalkyl amine concentration by weight.
Claims19
A polymeric composition in the form of a membrane or sorbent particles which contains (1) at least 40% of at least one homopolymer made from an alkyl amine and (2) one homopolymer produced from an alcohol of the formula:
- R1—H—R2
- wherein — is either a double or single bond, R1 is an OH group or a hydrocarbon chain of 2-4 carbon terminating in an OH group, and R2 is a hydrogen or a hydrocarbon chain or cyclic hydrocarbon moiety;
- or from a glycol of the formula:
- HO—R5—OH
- wherein R5 is a saturated or unsaturated hydrocarbon chain of from 2 to 4 carbon atoms and the polyamine is produced from one amine of the formula:
- R3—H—HR4
- wherein — is a single or double bond, R3 is an acid amine group containing no carbon atoms, a hydrocarbon chain terminating in an acid amine group, or a ring moiety containing an acid amine group, and R4 is a hydrogen or a hydrocarbon chain or cyclic hydrocarbon moiety with the carbon attached to R3.
Dependencies are inferred from the claim text.