[Changes in the chemical properties of environmental air in contact with polymeric construction materials used in modern buildings].

Sanitary and chemical studies of 15 types of polymeric building materials, used in the construction of modern establishments as floor coverings, lining and roofing materials, isolating materials and pastes. Elimination of chemical substances of the polymeric building materials is established. In the first days after their production or use the concentrations of the eliminated substances are considerably above the MAC--with some of the tens and hundreds times above the hygienic norm. MAC of the eliminated polymeric building materials is reached for different periods of time, as the latter define also the quarantine dates for permitting the usage of the materials. For materials which point out to considerable deviations of the norms on the first days after production or use a new instruction for technical safety is required. The diffused floor coverings on epoxide basis, paste "Pirolik" and some types of ligneous surfaces on the basis of carbamide-formaldehyde pitch, received unfavourable hygienic assessment. They show elimination of chemical substances considerably above MAC, even after more than 9 months of their production.