| abstract |
A porous open-cell filled reactive material containing a polymeric matrix of foamed polyvinylformal or foamed polyurethane and a finely-divided oxidation-reduction reactive fiber as a filler in an amount of from 10 to 80% by mass of the final material. The oxidation-reduction properties of the fibers are ensured through the use of oxidation-reduction agents which are covalently bonded with the fiber. As the oxidation-reduction agents use is made of the following compounds: polyhydric phenols, anthraquinones, naphthoquinones, phenothiazine dyestuffs. The oxidation-reduction fibers also comprise metal-containing fibers based on polyvinyl alcohol, cellulose-regenerated fibers, acetate cellulose or polyacrylic polymers. n The porous materials according to the invention are produced by mixing solutions of a polymer, formalin, surfactants, polyhydric phenols or oligomeric products of condensation thereof with aldehydes, and a catalyst with finely-divided reactive fibers, foaming the reaction mass and maintaining it at a temperature within the range of from 20° to 100° C. for a period of from 1 hour to 50 hours. As the polyhydric phenols use is made of hydroquinone, pyrocatechol, pyrogallol, and as the oligomeric products of condensation of said phenols with aldehydes use is made of novolac resins based on hydroquinone or pyrocatechol with formaldehyde. |