UNDER COATING FOR COATING SURFACE OF MARBLE AND COATED MARBLE

摘要

PURPOSE:To obtain a coated marble excellent in resistant-to-scuffing, resistant- to-hot water and resistant-to-light, etc., by previously applying a under coating consisting of hexafluorosilicic acid compd. and a solvent in the case of applying the partial condensate of organic silicon compd. to the surface of marble. CONSTITUTION:Hexafluorosilicic acid compd. is dissolved into a solvent e.g. water and this soln. is applied to the surface of marble. Then the partial condensate of organic silicon compd. consisting of 100 pts.wt. trialkoxysilane of a general formula RSi(OR1)3 and 20-130 pts.wt. tetraalkoxysilane of a general formula Si(OR2)4 is applied to the layer of this substrate agent. Wherein in the formulas, R shows 1-6C hydrocarbon group and R1, R2 show 1-6C alkyl group. Thereby the adhesive properties of the layer of partial condensate of organic silicon compd. can be enhanced. Further the concn. of the hexafluorosilicic acid soln. is regulated to 0.1-20wt.% expressed in terms of SiF6. The adhesive properties are not enhanced in the concn. less than 0.1% and the rate for dissolving marble is made large in the concn. exceeding 20% and the surface of marble is made ununiform.