New material of stone protection

   The most widely used building materials is stone, from ancient caves, stone bridge, stone pagodas to modern commonly used in a variety of decorative stone and various rock paintings, statues, wall inscriptions and monuments, the use of stone most exposed in the nature of the weathering environment, especially the development of modern industry, more serious threats of environmental pollution on the corrosion of the stone, with the development of science and technology, people gradually realize that correct use of stone protecting agent can slow down the stone of the corrosion and fouling, and prevention of a variety of stone disease.

         Stone material surface protecting agent of many kinds, inorganic surface protection agent and organic surface protection agent; semi permanent protection (paraffin wax, silicone oil, etc.) and for a long time of door, such as resin coating; surface membrane type and osmotic consolidation type; and so on. In this article, a new type of organic surface protective agent is studied.

          With low surface energy organic silicone resin can be low to 21-22mN/m, is ideal waterproof, antifouling materials, and resistance to corrosion, resistance to high or low temperature and stability is better. But the silicone resin has a lot of shortcomings, poor performance of the film, poor adhesion of the coating film, poor solvent resistance, high temperature, mechanical strength of the film is not good.

         Fluorine atoms in organic fluorine compounds of electronegativity, small diameter and C-F bond high, can significantly reduce the surface tension of water the. Perfluoroalkanes surface tension low to l0mN/m also with hydrogen atoms compared, fluorine atom more easily the C-F bond shielding, and keep the stability of the high content. This fluorine compounds with "three highs" (high surface activity, high heat resistance, high chemical stability) and "hate" (hydrophobic and oleophobic) characteristics. But the problem is the need for high temperature cross-linking, poor solubility in the solvent, the price is more expensive and other organic silicon, organic fluorine has advantages and disadvantages. They will combine to complement each other, complementary advantages. A new type of stone material, which has excellent waterproof, oil proof, anti - oil, anti - aging properties, and so on.