초록 ▼

Dense star polyamines having terminal group densities greater than extended conventional star polyamines exhibit greater and more uniform reactivity than their corresponding extended conventional star polyamines. For example, a second generation, amine-terminated polyamine dense star polyamine prepa

Dense star polyamines having terminal group densities greater than extended conventional star polyamines exhibit greater and more uniform reactivity than their corresponding extended conventional star polyamines. For example, a second generation, amine-terminated polyamine dense star polyamine prepared from tri(2-aminoethyl)amine and aziridine has 4.7×10-3 amine moieties per unit volume (cubic Angstrom units) in contrast to the 1.7×10-3 amine moieties per unit volume contained by an extended conventional star polyamine. Such dense star polyamines are useful as calibration standards, high efficiency proton scavengers and in making size selective membranes.

대표청구항 ▼

A dense star polyamine having at least one core branch emanating from a core, each core branch having at least one terminal amine group provided that (1) the ratio of terminal amine groups to the branches emanating from the core is 2:1 or greater, (2) the density of terminal amine groups in the dens

A dense star polyamine having at least one core branch emanating from a core, each core branch having at least one terminal amine group provided that (1) the ratio of terminal amine groups to the branches emanating from the core is 2:1 or greater, (2) the density of terminal amine groups in the dense star polyamine is at least 1.5 times that of an extended conventional star polyamine having similar core and monomeric moieties and a comparable molecular weight and number of core branches wherein each of such branches of the conventional star polyamine bears only one terminal amine group, and (3) a molecular volume that is equal to or less than 80 percent of the molecular volume of said extended conventional star polyamine.