Granite countertop’s (bottom) side face protecting agents and protective approach


    Ceramic tiles, architectural coatings, decorative stone is used for the construction of the external walls of the three major renovation or ground materials. Because such as granite and marble stone solemn, ho, durable, its decorative effect stronger than ceramic tile and paint. Granite, marble and other stone is the general attached to the ground in concrete walls or smeared mortar, and then sealed in the stone of the Tu again attached. But  concrete and cement mortar presence of calcium hydroxide and calcium sulfate precipitation will surface Stone, a Run-grouper, serious damage to its beauty. Also, the metal embedded in stone because of water-rusty pieces in stone surface rust spots. To prevent such pollution, often painted stone inside silicone waterproofing agent, polymer cement mortar, latex resin, epoxy resin, etc., are able to receive certain protective effect, but there are also less than the following: use of silicone waterproofing agent handling, stone and concrete, mortar veneer can be sealed layer formed , unable to effectively inhibit precipitates and Run-grouper; polymer cement used, not only their own material containing components, and water permeability, protective effect not ideal; using latex resin handling, drying, vulnerable to the impact of climate conditions, and its hydrophilic components (such as dispersing agent , thickener, etc.) in larger, water resistance and durability problems, applying epoxy treatment, are able to effectively prevent the Pan-cream and-run spot, but the construction of the poor, but also easy to stimulate the skin. Therefore, how to effectively prevent the stone surface of pan-cream, Run-grouper and rust spots, a foreign company is now introducing the invention within a stone protective surface treatment agent and its treatment.
     First, protective treatment agent
     The protective treatment agent is the use of non-aqueous dispersion-type resin and polyurethane resin wet with solid form.   As required physical pigments can be added, Defoamer, dispersants, anti-Shen agent, thickener, etc..
    1, non-aqueous dispersion type used by the appropriate acrylic resin, ethylene, styrene, vinyl acetate monomer, such as polymer or copolymer matrix materials, dispersed in mineral oil in non-aqueous dispersion medium. Here the use of non-aqueous dispersion medium, if not high, toxicity, ease of construction.
   2, polyurethane use by isocyanate curing resin, preferably in the presence of water use, it can be 3 to 8 hours curing single portfolio moisture-curable polyurethane resin.
    3, physique pigments used heavy calcium carbonate, talc, clay, and so on.
    4, admixtures
    (1) the use of vinyl polymer, such as defoamer. It will prevent the construction of treatment agent foam, causing uneven phenomenon.
    (2) the use of carboxylic acid, salt and other dispersant, it is easily dispersed batch.
    (3) the use of polyether, esters and other defense Shen agent, to prevent resin solids from scattered points in the medium precipitation.
    (4) In order to facilitate the construction of attached, to the use of bentonite, and other thickeners.
 
Second, protective approach
    Attached Stone, the first in the face and the side of Stone to 0.2 ~ 0.3 kg/m3 the volume of spray or roller Tu Tu protective treatment agent and then attached to the building wall to the ground, in room temperature with 1 to 2 hours after curing protective treatment agent, stone walls or on the ground with the full adhesion.
    
    Third, protective treatment test
    Non-aqueous dispersion of acrylic resin 46.1 percent;
    Moisture-curable polyurethane resin 19.7 percent;
    Physical pigments (calcium carbonate) 26.3%;
    Defamer (specific ethylene polymers) 0.7%;
    Dispersant (carboxylic acid salt) 1.3%;
    Anti-Shen agent (polyether, Ester active agent) 1.3%;
    Thickener (Expanded Territories) 2.0%;
    Oil solvent oil (high boiling point hydrocarbon solvent) 2.6%.
    The protective treatment agent from 0.2 to 0.3 kg/m3 Tu Tu volume in the face and the side of Granite, the following performance tests:
    1, accelerated pan-cream Test
    With 5% sodium sulfate solution on the granite surface protection to deal with the Pan-cream accelerated test. Results show that the pan-cream stone surface, not changing color, not crystallized.
    2, adhesion test
    Protective surface treatment in granite mortar Tu, conservation 21 days, and then affixed with epoxy mortar surface with steel template, placing 2 h, with Rally of adhesion testing machine. The results show that strong adhesion to 7 kg/cm2.

    3, and the sealing material adhesion test
    In the granite surface coated protective sealing material handling, drying and then sealed with epoxy resin adhesive surface coated steel template, 2 h later Rally of adhesion testing machine. The results showed that the adhesion and sealing material is strong, reaching 5 kg/cm2.
    4, the construction of assessment
    5, the granite and so easy to smear evaluation. The results showed that construction of good.
    6. Conclusion
    Non-aqueous dispersion-type resin and curing polyurethane wet mix the two can mutually reinforcing, and give full play to their properties and construction: The first is to enhance water resistance, alkali resistance and other properties to prevent the pan-cream, Run-grouper and rust spots on stone surface contamination; The second is to strengthen the concrete, cement, wood sealed the adhesive force.