METHOD FOR PROTECTION OF POROUS SURFACE OF RESTORED MONUMENTS OF CULTURE Russian patent published in 1997 - IPC

FIELD: methods of protection of various porous surfaces in carrying out of restoration work, in particular, treatment of surfaces of ancient structures from adobe encountered in archaeological work, or surface layers of monumental painting and sculpture located in interior of restored monument under direct effect of atmosphere. SUBSTANCE: method includes formation on the treated surface of semipermeable membrane from polyelectrolyte complexes resulted from reaction of low-concentrated (not above 2%) solutions of polyelectrolytes with molecular mass not exceeding 300,000 taken in equimolar ratio. Depending on rate of formation of polyelectrolyte complex, polyelectrolyte solutions (poly bases and poly acids) are applied simultaneously in form of their mixture or successively one after another, if complex formation rate is rather high. Solvent is used in form of water, alcohols or water-alcohol mixtures (1:1, 2:1). Solvent is selected individually for each pair of polyelectrolytes used in formation of protective coating, depending on strength of polyelectrolyte, nature of treated object, its structure and degree of destruction. The latter factors also govern the number of impregnations and concentration of protective solution which are selected for each concrete monument individually. EFFECT: higher efficiency of protection of treated surface, its heat-, light-, moisture- and salt-resistance. 3 cl, 1 tbl