| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: present invention relates to a method of treating and modifying materials. Described is a method of preparing materials which protects said materials from UV radiation and ozone using a modifier, involving obtaining the modifier by reacting a stilbene derivative in form of 4,4'-bis(s-triazinyl-)diamine-2,2'-disulphostilbene at temperature of up to 55C in the presence of water with diamine of carbonic acid in amount of 0.5-55 wt % with respect to weight of said stilbene derivative, and material such as foamed or foamable plastic, cement or concrete is then directly treated with the prepared modifier, and/or active radicals of said modifiers are introduced into the surface of said materials. Described also is a method of preparing materials for their protection from UV radiation and ozone using a modifier, involving obtaining the modifier by inoculating a stilbene derivative in form of 4,4'-bis(s-triazinyl-)diamine-2,2'-disulphostilbene with solid diamine of carbonic acid with crystal size less than 40 mcm at 55C in the absence of water, by grinding the modifiers in a mill and homogenisation at ambient temperature for more than 4 hours, with amount of diamine of carbonic acid of 0.1-45 wt % with respect to the solid stilbene derivative, and material such as foamed or foamable plastic, cement or concrete is then directly treated with the prepared modifier, and/or active radicals of said modifiers are introduced into the surface of said materials. ^ EFFECT: elimination of negative effect of UV radiation and ozone on surface of materials. ^ 2 cl, 4 ex |
