Classification of protectant: protectant is a kind of liquid specially used to protect stone, which is mainly composed of solute (effective component), solvent (diluent) and a small amount of additives. In recent years, the rapid development of architectural decoration industry has promoted the rapid growth of stone protection industry, and the protective agent market is unprecedentedly prosperous, with dozens of varieties and an increasing trend. In order to facilitate users to distinguish and use correctly, Shanghai Hongben Stone Maintenance Co., Ltd. combined with many years of experience, according to the different components, properties, characteristics and uses of stone curing agents, divided them into several categories, hoping to give you some reference value.
(1) classified by solvent type
A. Water-based protectant: A protectant that completely uses water as diluent is called water-based protectant. This protective agent is generally odorless, less toxic, nonflammable and highly safe. For example: "Green Angel" HB-S 10 1, 103, 103A, etc.
B. Solvent-based protectant: The protectant with other solvents except water as diluent is called solvent-based protectant. It can also be divided into water-soluble solvent-based protectants and oil-soluble solvent-based protectants. For example: "Green Angel" HB-S30 1, 302, 40 1 and so on. A water-soluble solvent refers to a solvent that is completely miscible with water. Such as alcohol; Oil-soluble solvent refers to a kind of solvent that is compatible with oily substances but insoluble in water. Such as benzene, ketone, ester, etc. The protective agent with water-soluble solvent as diluent is called water-soluble solvent-based protective agent; Protective agents with oil-soluble solvents as diluents are called oil-soluble solvent-based protective agents.
Solvent-based protective agents generally have strong smell, relatively high toxicity and flammability, and the density is generally < 1.
C, emulsion protective agent: it is made of oil-soluble solute, water as diluent and emulsifier, and emulsified by high-speed stirring. Its color is milky white, its smell is small, it is nonflammable and its toxicity is relatively small.
(2) According to solubility.
A. Oily protectant: The protectant that can be dissolved by oil-soluble solvent is called oily protectant. Such as: oil-soluble solvent protective agent, etc. This protective agent is generally permeable, but it is relatively toxic, flammable and has a strong smell. Suitable for protecting the front and dense surface of stone. For example: "Green Angel" HB-S30 1, 40 1, 502, etc.
B, water-based protective agent: water-soluble stone curing agent is called water-based stone protective agent. Such as water-based protectants, water-soluble solvent-based protectants, emulsion-based protectants and the like. Generally speaking, this kind of protective agent has relatively weak permeability (except water-soluble solvent-based protective agent), but its toxicity and odor are relatively small and it is not flammable. Suitable for the protection of loose stone surface. For example: "Green Angel" HB-S 10 1, 103, 107, etc.
(3) according to the solute composition classification
A. Acrylic protectant: The protectant with acrylic resin as the main effective component (solute) is called acrylic stone protectant. It has sealing performance, and it will form a film after being coated on the surface of stone, which has plastic luster, but its aging resistance is not enough, and it will deepen the color of stone after being coated. It is suitable for protecting the rough stone surface or stone bottom surface that needs to be sealed (the interface destruction ability must be tested). For example: "Green Angel" HB-S60 1 etc. Belonging to the second generation protection products. (The first generation is wax)
In addition, there are protective agents with epoxy resin or other resins as the main materials, and their properties and characteristics are generally similar, so I won't go into details here.
B. Silicone-acrylic protectant: The protectant with the compound of acrylic resin and silicone as the main effective component (solute) is called silicone-acrylic stone protectant. This product is a transition product from acrylic acid protectant to silicone protectant, which solves the shortcomings of acrylic acid's easy yellowing and short service life. It is the second generation of improved products, such as "Green Angel" HB-S50 1, 502, etc.
C. Silicone protectant: The protectant with siloxane as the main effective component (solute) is called silicone stone protectant. Commonly used silicone include sodium methylsilicate, methyl methylsilicate, silane, siloxane, etc. This protective agent is characterized by a silicon chain network structure, strong permeability and air permeability, and will not change the color of stone. Its disadvantage is poor oil resistance. Suitable for any surface treatment of all stone materials (please refer to the product description before use). Silicone stone curing agent is the main product type on the market at present, which belongs to the third generation product. For example: "Green Angel" HB-S103,302,401503, etc.
D. Silicone-fluorine type: the protective agent with silicon-fluorine compound as the main effective component (solute) is called silicon-fluorine type stone protective agent. This product inherits the advantages of silicone, and enhances the oil-proof, anti-fouling and anti-aging properties, so it is the best protective product at present. It is suitable for any surface treatment of all stones with special protection requirements and belongs to the fourth generation product. For example: "Green Angel" HB-S20 1, 202, etc.
(4) According to the action mechanism.
A. Film-forming protective agent: The protective agent that remains on the stone surface after application and forms a visible film layer is called film-forming protective agent. Such as acrylic acid protectant, silicone acrylate protectant and silicone protectant. It is mainly suitable for protecting the surface of unpolished stone. For example: "Green Angel" HB-S50 1, 502,601and so on.
B. Permeability protectant: After application, all the effective components of the protectant penetrate into the stone through pores to play a role, and the protectant without visible film on the stone surface is called permeability stone protectant. Such as: siloxane type protective agent, fluorosilicone type protective agent, etc. Suitable for protecting all stone surfaces. For example: "Green Angel" HB-S 10 1, 30 1, 402, etc.
(5) according to the interface force classification
A. Hydrophobic stone protectant: After use, it will expand the tension between the stone surface and water (the tension is greater than the adhesion), which can make the water roll on the stone surface, especially the rough stone surface. However, this effect is very short-lived and will soon fade away with the loss of effective components on the surface. It is the water resistance and water pressure resistance of the protective agent that ultimately plays a role. This kind of protective agent is mainly oily, and some water-based ones also belong to this category. For example: "Green Angel" HB-S302,501etc.
Hydrophobic stone protectant can not be used to protect the bottom of stone, because its hydrophobicity will form an interface between stone and cement, which will affect the adhesion and make the stone hollow.
B. Hydrophilic stone curing agent: After use, the tension between the stone surface and water will not expand (the adhesion is greater than the tension), and the water can be evenly adsorbed on the stone surface, without water droplets rolling, but it will not enter the stone. The effect of this protective agent is also mainly determined by its water resistance and water pressure resistance. Hydrophilic protectants are mainly some water-based stone protectants. For example, "Green Angel" HB- 10 1, 103, 103A, etc.
Almost hydrophilic stone protectant can be used for six-sided protection of stone. When used for bottom protection, it will not form an interface and will not affect the adhesion, but it will not increase. Because of its weak permeability, it can not be used for stone protection with dense structure.
(6) Classification by protection purpose
A. Bottom stone curing agent: a protective agent specially used for stone ground protection treatment, which will not form an interface and will not affect the bonding between stone and cement. Some protectants also add adhesive substances to increase their adhesive strength. These protective agents mainly include some hydrophilic siloxanes and film-forming protective agents. For example: "Green Angel" HB-S60 1 etc.
B, surface stone curing agent: a protective agent that can't be used to protect the bottom layer of stone, and generally has hydrophobic effect. When used, it should be selected according to different finishes, mainly oily stone protectants and some water-based stone protectants. For example, "Green Angel" HB-S20 1, 302, 40 1 and so on.
C special curing agent for special stone varieties: a protective agent specially used to protect certain stone varieties. Such as HB-S 103A special protective agent for sandstone, special protective agent for white hemp, etc.
D. Universal stone protectant: a protectant suitable for protecting any surface of all stones. Such as hydrophilic silicone stone curing agent and fluorosilicone stone curing agent.
(7) according to the protection effect classification
A. Waterproof protective agent: It can prevent water from infiltrating into the stone after being coated, and also has the functions of antifouling (local), acid and alkali resistance, aging resistance, freeze-thaw resistance and biological erosion resistance. Such as acrylic resin, silicone acrylic resin and silicone stone protectant. For example: "Green Angel" HB-S 10 1,103,302, etc.
B. Anti-fouling protective agent: a protective agent specially designed for the anti-fouling of stone surfaces, whose functionality mainly focuses on anti-fouling performance, while other properties and effects are average. Such as an antifouling agent on the surface of vitrified bricks. For example, "Green Angel" HB-S20 1, 202,401and so on.
C, comprehensive protective agent: it has excellent oil-proof, anti-fouling and anti-aging properties, and also has all the functions of waterproof stone protective agent. Such as "Green Angel" HB-S20 1, 202, 40 1 and so on.
D professional protective agent: a protective agent specially developed for the special functional requirements of stone surface polishing and coloring. Such as color-enhancing stone protective agent, luster-enhancing stone protective agent, etc. "Green Angel" HB-S40 1, 50 1 and so on.
Method of distinguishing curing agent
(1) odor: solvent-based protectants (odorous) and completely water-based protectants (odorless) can be distinguished. Oil-soluble solvent curing agent and water-soluble solvent curing agent can also be distinguished by different smells.
(2) Combustion: solvent-based protectants (flammable or combustible) and completely water-based protectants (nonflammable) can be distinguished.
(3) Look: the liquid of the curing agent is milky white, which is an emulsion protective agent, and the colorless one is other curing agents. In addition, the curing agent is put into the glass and then injected with water, and the water layer is oily curing agent; The water-based curing agent is completely integrated with water.
(4) Handfeel: Both silicone and silicone protectants have a satiny feeling, while acrylic protectants have a strong sticky feeling, and silicone-acrylic protectants have a slightly weaker sticky feeling than acrylic protectants.
(5) Weighing: Weighing with 1L curing agent as the unit. In general, anything less than 1K is oily; The water base is equal to or greater than 1 kg.
Protective construction technology
(1) Prerequisite: In general, the stone surface must be kept clean and dry before it can be protected [some stones can be constructed under wet conditions (without Mingshui), and the protection effect needs to be verified].
(2) All the gaps of decorative stone constructed by wet sticking method must be caulked, fully dried after filling, and then cleaned.
(3) coating curing agent.
(4) Apply curing agent for the second time (according to the requirements of stone or customers).
(5) removing the residual protective agent on the surface.
(6) Maintenance: The stone must be maintained after protection. The curing time of different curing agents is different, generally the curing time is about 24 hours.
Protective construction mode
There are seven ways to protect stone materials: brushing (with brush), brushing (with sponge), wiping (with cloth), spraying (with low-pressure spray gun), soaking (with soaking tank), roller coating (with roller) and pouring (with container).
During construction, the protective construction method must be determined according to the type of stone facing and related protective agents.
(1) Spraying: This construction method is characterized by fast construction speed and uniform coating, which is especially suitable for the construction of mushroom-faced stone. But it's wasteful and expensive.
(2) Soaking: The main advantage of this construction method is that the stone can be fully protected inside and outside, and there will be no problem of insufficient penetration like other methods. Among all the construction methods, only soaking can achieve the best protection effect. However, because the stone absorbs too much protective agent, the cost is high. Therefore, some curing agents with high quality and low price are required. Such as: Green Angel HB-S 103, etc.
(3) Roller coating is suitable for large-area ground protection construction, and the loss is too great when used on the wall surface. Generally used for curing agent construction with low cost.
(4) Cloth rubbing, this construction technology is used for brighter stone surfaces. This construction method is generally not recommended, but it is a better construction method if the amount of cloth coating construction can protect the stone.
(5) Sponge coating, which is used on the shiny surface of stone, can be evenly coated with protective agent.
(6) Pouring is suitable for all kinds of stone surfaces, but it requires higher equipment and site.
(7) brushing. This technology is suitable for all kinds of surfaces, and the dosage can be controlled at will. This is a common good construction method.
The common disadvantage of the above six construction techniques (1, 3, 4, 5, 6, 7) is that they can't effectively protect the inner depth of the stone. Therefore, we promote the soaking construction technology (for stone factory), which can make up for the deficiency of some protective agents.
Different stone protectants have different construction requirements. Before construction, a feasible construction scheme should be made according to the description of the protective agent used and the actual situation on site. In addition, the protective effect of stone has a great relationship with the quality of protective agent, construction technology and the quality of construction personnel. Therefore, it is best to consult a professional stone maintenance company or handle it by them before the protection construction, so as to ensure the quality of protection.