Modified polyurethane foamed materials used as adsorbents

Details Modified polyurethane foamed materials used as adsorbents Modified polyurethane foamed materials used as adsorbents

2005-02-15

2005-02-15

Cooney, Jr., John M. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S094000, C521S123000, C521S128000, C521S163000, C521S170000, C525S452000

Reexamination Certificate

active

06855739

ABSTRACT:
The invention relates to polyurethane foams comprising(i) ethylenimine, polyethylenimine, polyvinylamine, polyvinylamine copolymers, carboxymethylated polyethylenimines, phosphonomethylated polyethylenimines, quarternized polyethylenimines and/or dithiocarbamatized polyethylenimines or(ii) alkali hydroxides and/or alkaline earth metal hydroxides ora mixture consisting of both (i) and (ii).

REFERENCES:
patent: 5847014 (1998-12-01), Nodelman et al.
patent: 03 009950 (1991-01-01), None
patent: 94 00237 (1994-01-01), None

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