| 摘要 |
<p>The surface of lapideous materials, marble, sandstone, tiles cement conglomerates and articles and structures manufactured therefron are consolidated and protected against atmospherical and polluting agents by superficially applicating a mix composed of: a) a vinylidene fluoride elastomeric copolymer comprising 55-85% by mols of vinylidene fluoride, 15-45% by mols of hexafluoropropene and 0-30% by mols of tetrafluoro ethylene; b) polytetrafluoroethylene or a copolymer of tetrafluoro ethylene containing up to 12% by mols of other perfluorinated monomers. c</p> |
