Analytical quality indicators stone protection

"Natural stone for building decoration Protectant" (JC/T973-2005) defined protectants, the main ingredients can combine with natural stone, the stone's appearance did not change significantly, effectively reducing the water absorption of the stone, markedly improved resistance to stone pollution performance, the effect is relatively stable in the pH conditions of the solution. Except as otherwise agreed. "Can be seen from the above definition, the role of stone is the protective agent can effectively reduce the stone water absorption, and markedly increase the contamination resistance of stone. To prevent the disease and weathering, reducing the workload of the complex has an important routine maintenance marble. The quality index is also fully reflected in the definition: the main ingredient and combination of stone; effect is relatively stable in the pH conditions. This is to emphasize the meaning of several provisions of the stone protector to have long-term and stable use of effects.

    First, the quality indicators

    1. Stone and the main active ingredient protectants

    Stone protection and protective agent as a mature technology and products used in stone has been a long process of continuous development and improvement. In today's new technologies, new materials and innovative granite, almost all able to refer to both the technology and materials in which the expression. Simply put, the major components of various stone protective agent can be divided into two parts, one for the active substance in the stone to play a functional role of protective agent, the quality of the total mass of only 5%-l5% or so. The other is solvent, its role is to dissolve the former one, and then renewed a role of the media, the protector of the active substance into the stone house.

    There is no doubt play a key role in the stone's protective agent or the active material. Facts have proven that silicone polymer is an ideal and relatively perfect stone protective materials, it has good water and hydrophobic, stable performance, good chemical resistance, molecular size and structure of the ideal, and the formation of organic stone combination. Now the market is the most varieties of stone Protectant organic polymer as the main active ingredient, if the active ingredients of the formulation of scientific and reasonable structure, these protective agent should have such characteristics: good waterproof, acid-base conditions Under the effect of stability, good permeability, and stone combination. Of course, the protective agent of the formula composition technology and costs involved, and many other factors, the a protective agent in the performance of each species will have a large quality differences, these differences are mainly in some of the inherent quality indicators.

    Silicone polymer as a protective agent activity for the selection of stone there are also fly in the ointment to use, its performance is poor performance in the anti-oil and fluorine with fluorine chemistry materials technology matures, organic fluorine polymers are also used in the field of stone protection, It is excellent resistance to oil and chemical resistance, anti-pollution performance and the performance of the stone is relatively more perfect repellant. But it is far from waterproof silicone polymer so well. Therefore, people often organic fluorine and silicone used in combination, make the ideal stone waterproof protective agent both have good antifouling performance. Thus, we can confirm that the active material composition of stone Protectant to differentiate the product protection: waterproof silicone products better anti-fouling properties of organic fluorine products, good organic fluorine products silicon waterproof, integrated pollution prevention better performance. Of course, not all of the organic silicon and organic fluorine stone protection product performance are the same, it is with the specific use of organic fluorine and silicone polymer content of the type and performance and a greater relationship.

    2. Stone's waterproof protective agent

    This is to express the repellant properties of the stone is a basic index, which indicated that the water repellant ability of the stone, that stone protective agent after brushing the stone to stone on the water absorption of the degree of change, usually waterproof said. Water resistance = (protection before a protective stone after stone water absorption and water absorption) / protection of water absorption before the stone Xl00%. The higher the index, indicating the better performance of waterproof protective agent. From the point of view of existing materials and technology, water index of 90% to 80% should be relatively good. Of course, since the stone is breathable material, and the large density difference between the structure of stone, to be waterproof is l00% is unrealistic.

    3. Stone protectants alkaline

    This is the expression of the inherent quality of the stone Protectant one of the key indicators, it means brushing the stone on the protective agent, it can damage the ability to withstand the alkaline substance, which is the stone protective agent in alkaline conditions the stability of performance, usually alkali said. Alkali resistance = (protection before the water absorption of a protective stone after stone in the water absorption in alkaline solution) / protection of the water absorption of the former stone × 100%. The higher the index, indicating possible protective agent in the alkali resistance. Because stone Protectant active ingredients in the alkaline material damage experience has shown the stability is different, and where the wet stone cottage of cement has shown strong basic long-term, so this indicator be selected ground stone protection an important indicator agent. Stone waterproof and the smaller the difference between alkali index, indicating the performance of protective agent more stable under alkaline conditions, the better protection, more long-term effects remain.

    4. Protectants acid stone

    This is the expression of the inherent quality of the stone Protectant one of the key indicators, it means brushing the stone on the protective agent, it can damage the ability to resist acids, usually acid said. Acid resistance = (protection before the water absorption of a protective stone after stone in the water absorption in the acidic solution) / protection of the water absorption of the former stone × 100%. The higher the index, indicating possible protective agent in the acid resistance. Protectant active ingredients in the stone face acid shown by the destruction of the stability is different, and the stone used in the building when the outer wall of a long-term harm of acid rain, clean the cleaning agent used in construction are most strongly acidic, so this indicator is selected to become an important symbol of the external walls of stone protector. Stone waterproof and acid differences between the smaller the index, indicating the performance of protective agent more stable under acidic conditions, protective effect of better, more long-term effects remain.

    5. Stone Protectant permeability

    This is the expression of the inherent quality of the stone Protectant one of the key indicators, it means brushing the stone on the protective agent, the active material immersed in the ability of the stone surface. Detection of this indicator is very intuitive, is the protective agent in the stone tables to deal with brushing twice, 24h after knocking off the stone, the section on the water dip, the depth of the surface does not change color in this stone is the protective agent the permeability. The higher the index, indicating the better ability to penetrate the protective agent, protective layer of the ability to wear scrub better, more long-term Slate. Protective agent in the active matter content is higher, brushing a few times more, then the stronger the penetration shown. Relatively speaking, the permeability of water-soluble protective agent will be hearing.