News

Table of Contents

Category

Products

Send Your Inquiry Today

How to protect stone

How to protect stone?

 

Stone protection refers to coating the stone protection agent on the surface of the stone by spraying, brushing, rolling, drenching, soaking, etc., so that it combines with the hydroxyl groups in the capillary holes of the stone to form a mesh-shaped protective layer, thereby preventing the occurrence of stone lesions . The main substances of this type of protective materials are mostly silicon (such as silicate, siloxane, etc.) or fluororesin materials (such as fluorine-acrylate, etc.). The price of silicate is relatively low, but it is waterproof, antifouling, and ultraviolet resistant. Performance is not as good as the latter.

 

Colorless and transparent definition

Stone protection is to use some methods such as brushing, spraying, painting, rolling, drenching and soaking, so that the protective agent is evenly distributed on the surface of the stone or penetrates into the stone to form a kind of protection, making the stone waterproof, antifouling and acid resistant Alkali, anti-aging, anti-freeze-thaw, anti-bio-erosion and other functions, so as to achieve the effect of improving the service life of stone and decorative performance.

 

Protection agent classification

The protective agent is a liquid specially used to protect the stone, mainly composed of solute (active ingredient), solvent (diluent) and a small amount of additives. In recent years, due to the rapid development of the construction and decoration industry has promoted the rapid growth of the stone protection industry, the protective agent market has become unprecedentedly prosperous, with dozens of varieties and increasing trends. In order to facilitate the correct distinction and use of the majority of users, the stone curing agent is divided into several categories according to its different ingredients, properties, characteristics, and uses, and I hope to give you some reference value.

 

By purpose

 

 

It can be divided into two categories: waterproof and antifouling.  Waterproofing agents are liquid materials that can provide waterproof protection to stone and prevent the stone from being damaged by water. Antifouling agent is a liquid material that can prevent the stone from being damaged and contaminated by water and other liquid dirt (such as juice, cooking oil, motor oil, dye, etc.).

 

By active substance

 

 

Can be divided into silicate protective agent, silicone oligomer protective agent, acrylic protective agent, organic fluorosilicone protective agent and organic fluorocarbon protective agent.

 

I. The silicate protective agent on the market is mainly an aqueous solution containing inorganic silicate as the active ingredient. It is one of the earliest applied silicone protective agents.

 

II. Organosilicon oligomer-based protective agent A protective material configured with silane monomers or siloxane oligomers with a small molecular structure or a mixture of the two as the active material.

 

III. Acrylic or silicone resin protective agent is made of acrylic resin as a coating to protect the interface of the processed stone. Generally, some rough stone surfaces are used, such as fired surfaces, etc., because the pores of this type of stone surface are completely open and are easily contaminated. In addition, it is also used for sealing treatment on the bottom surface of the stone, which can effectively prevent the wet stone from returning to alkali water spots.

 

 

IV. Organofluorosilicone resin protective agent is a kind of multifunctional protective agent which is synthesized by using the unique low surface characteristics of organic fluorine and the small molecular structure of silicone.

 

V. Organic fluorocarbon resin protective agent belongs to a new generation of stone protective agent, making full use of the extremely low surface tension of organic fluorine, excellent weather resistance and anti-pollution oil release effect, especially suitable for high-end villas, bars, clubs, five-star hotels Wait.

 

Press diluent

 

Can be divided into solvent-based stone protective agent and water-based stone protective agent.

 

I. Solvent-based stone protection agent is a stone protection agent that uses organic silicon or organic silicon fluoride as the active substance and uses some petroleum solvents or other chemical solvents as carriers.

 

II. Water-soluble stone protection agent Stone protection material with water as solvent. According to the different active ingredients added, they are divided into silicate and silicone emulsion protective agents.

 

Press processing substrate

Can be divided into general type and special type

 

 

I. Universal type, can be used for most stone materials such as granite, marble, sandstone, slate, culture stone and so on.

 

II. Special type, a protective agent specially configured for the characteristics of various stones, such as the special protective agent SINO-1300 for marble, which is not resistant to acid and soft in texture, specifically for the characteristics of granite dense and difficult to penetrate, easy to change color, etc. SINO-1400, a special protective agent for granite, is specially designed for SINO-1500, a special protective agent for sandstone that is characterized by loose and porous sandstone, high water absorption, easy freezing and thawing, and easy to yellowing and blackening. SINO-1600, the bottom protective agent (stone sealant) prone to alkali reversion, is specially used to increase the gloss of rough stone (fired surface, litchi surface, machine knocked surface, mushroom surface, antique surface), specially used SINO-1800 is a stone brightener for dealing with stone color difference and changing stone texture.

 

Ⅲ. Quick-drying type, designed for the fast-drying protective agent SINO-1200 under the conditions of low temperature in winter and rushing to the project in the north.

 

By solvent type

 

A. Water-based protective agent: A protective agent that completely uses water as a diluent is called a water-based protective agent. This kind of protective agent generally has less odor, low toxicity, non-flammability and high safety performance.

 

B. Solvent-based protective agent: A protective agent that uses other solvents than water as a diluent is called a solvent-based protective agent. It can be divided into water-soluble solvent-based protective agent and oil-soluble solvent-based protective agent. The water-soluble solvent refers to a type of solvent that is completely compatible with water. Such as alcohols; oil-soluble solvents refer to a class of solvents that are compatible with oily substances but not miscible with water. Such as benzenes, ketones, esters, etc. The protective agent using water-soluble solvent as diluent is called water-soluble solvent-based protective agent; the protective agent using oil-soluble solvent as diluent is called oil-soluble solvent-based protective agent.  Solvent-based protective agents generally have a strong odor, are relatively toxic, flammable, and generally have a density of <1.

 

C. Emulsion type protective agent: It is made of oil-soluble solute and water as the diluent, emulsified by adding emulsifier and stirred at high speed. Its color is milky white, small odor, non-flammable, and relatively low toxicity.

 

According to the solubility

 

A. Oily protective agent: The protective agent that can be dissolved by oil soluble solvent is called oily protective agent. Such as: oil-soluble solvent protective agent. Such protective agents generally have strong penetration, but are relatively toxic, flammable, and have a strong odor. It is suitable for the protection treatment of stone front and dense surface.

 

B. Water-based protective agent: The stone curing agent that can be dissolved by water is called water-based stone protective agent. Such as water-based protective agent, water-soluble solvent-based protective agent, emulsion-based protective agent, etc. This type of protective agent generally has a relatively weak penetration (except for water-soluble solvent-based protective agents), but its toxicity and odor are relatively small and non-flammable. Suitable for protective treatment of loose stone surfaces.

 

By action mechanism

 

A. Film-forming protective agent: The protective agent that stays on the surface of the stone and forms a visible film layer after application is called the film-forming protective agent. Such as: acrylic protective agent, silicone acrylic protective agent, silicone resin protective agent, etc. Mainly suitable for the protection treatment of non-polished stone surface.

 

B. Penetrating protective agent: After application, its effective ingredients all penetrate into the stone through capillary pores to act. The protective agent without visible film on the surface of the stone is called permeable stone protective agent. Such as: silicone type protective agent, fluorine silicon type protective agent, etc. Suitable for the protection of all stone surfaces.

 

By protective use

 

A. Bottom stone curing agent: a protective agent specially used for stone floor protection treatment, which will not form an interface and will not affect the bonding of stone and cement. Some protective agent formulations also include bonding substances to increase their bonding strength. These protective agents mainly include some hydrophilic silicones and film-forming protective agents.

 

B. Surface stone curing agent: a protective agent that cannot be used for the protective treatment of the bottom surface of the stone, generally has a hydrophobic effect. When using it, it needs to be selected according to different finishes, mainly oily stone protective agent and some water-based stone protective agent.

 

C. Special curing agent for special stone varieties: a protective agent specially used for the protective treatment of certain specific stone varieties. Special protective agent for sandstone, special protective agent for white hemp, etc.

 

D. Universal stone protective agent: a protective agent suitable for all stone surfaces for protective treatment. Such as hydrophilic silicone stone curing agent, fluorosilicone stone curing agent, etc.

 

According to protective effect

 

A. Waterproof protective agent: after application, it can prevent water from penetrating into the stone, and also has functions such as antifouling (part), acid and alkali resistance, anti-aging, anti-freeze-thaw, and biological erosion resistance. Such as acrylic type, silicon acrylic type and silicone type stone protective agent.

 

B. Anti-fouling protective agent: a protective agent specially designed for anti-fouling on the surface of stone. Its functionality mainly focuses on anti-fouling performance, and other properties and effects are general. Such as antifouling agent on the surface of vitrified brick.

 

C. Comprehensive protective agent: In addition to its excellent oil-proof, anti-fouling and anti-aging properties, it also has all the functions of a waterproof stone protective agent.

 

D. Professional protective agent: a protective agent specially developed for special functional requirements such as glazing and color enhancement on the surface of stone. Such as color-enhancing stone protection agent, gloss-enhancing stone protection agent, etc.

 

Instructions

I. Use a wool brush or a white towel to paint: cross staggered brush to prevent missing brush. II. Spraying with pressure pot: adjust the atomization degree of the nozzle and move the nozzle on the stone surface at a certain speed. Advantages: fast speed, especially for already installed stone. Disadvantages: big waste. III. Use container pool immersion: Pour the protective agent into the pool and immerse the stone in it. The immersion time can be adjusted by yourself, from a few seconds to tens of minutes. Advantages: protection in place; disadvantages: large amount.

 

Judging criteria

I. Waterproof performance This is a basic indicator to express the performance of the protective agent. It indicates the waterproof capacity of the stone, indicating the degree of change in the water absorption rate of the stone caused by the stone protective agent painting on the stone. It is usually expressed as waterproofness. Water resistance = (water absorption rate of stone before protection-water absorption rate of stone after protection agent) / water absorption rate of stone before protection X100%. The higher the index, the better the waterproof performance of the protective agent. From the existing materials and technologies, the waterproof performance index should be relatively good at 80-90%. Of course, since it is a breathable material, it is unrealistic to achieve 100% waterproofness. II. Acid and alkali resistance This is one of the key indicators to express the inherent quality of the protective agent. It represents the ability of the protective agent to resist the damage of alkaline materials after being applied to the stone. It is usually expressed as alkali resistance. Alkali resistance = (water absorption rate of stone before protection-water absorption rate of stone in alkaline solution after protection agent) / water absorption rate of stone before protection X100%. The higher the index, the better the alkaline performance of the protective agent. Since the stability of the silicone oligomers when they are damaged by alkaline substances is different, and the strong alkalinity exhibited by the cement after the stone is wet is long-term, the smaller the difference between this index, It shows that the more stable the performance of the protective agent is under alkaline conditions, the better the protective effect and the longer it is. III. Acid resistance This is one of the key performance indicators that express the inherent quality of the protective agent. It represents the ability of the protective agent to resist the damage of acidic substances after being applied to the stone. It is usually expressed as acid resistance. Acid resistance = (water absorption rate of stone before protection-water absorption rate of stone in acid solution after protection agent) / water absorption rate of stone before protection X100%. The higher the index, the better the acid resistance of the protective agent. The stability of the silicone polymer when exposed to the destructiveness of acidic substances is different, and the harm of acid rain when the stone is applied to the external wall of the building is long-term, so this index has become the choice of external stone protection agent Important sign. The smaller the difference between the stone’s water resistance and acid resistance indicators, the more stable the performance of the protective agent under acidic conditions, the better the protection effect, and the longer it is. IV. Permeability This is one of the key indicators to express the inherent quality of the protective agent. It indicates the ability of the protective agent to be painted on the stone and immersed in the surface layer of the stone. The detection of this indicator is very intuitive, that is, the protective agent is painted twice on the surface of the stone to be treated. After 24h, the stone is broken, the section is dipped in water, and the depth of the surface layer without discoloration is the penetration of the protective agent into this stone Sex. The higher the index, the better the penetration ability of the protective agent, the better the resistance of the protective layer to wear and scrub, and the longer the effect. The smaller the molecular size and the higher the content of the active substance in the protective agent, the slower the rate of solvent volatilization, and the more brushing passes, the stronger the permeability. Relatively speaking, the permeability of water-based protective agent will be worse. V. Anti-fouling performance This is a basic index to judge the anti-fouling ability of stone protective agent. It represents the ability of the treated stone to resist liquid contamination. It is also very intuitive to detect this indicator, that is, paint the surface of the stone to be treated twice, and use some pollutants for testing after 48h. Usually cooking oil, machine oil, ink, cola, etc. are used for testing. The smaller the traces of dirt diffusion and penetration, the stronger the anti-fouling ability of the protective agent. In addition, the evaluation of the anti-fouling ability must be considered in combination with the above four indicators. The better the anti-fouling ability, the higher the above four indicators is the best protective agent.

 

Distinguish method

(1) Smell: Distinguish between solvent-based protective agent (with odor) and completely water-based protective agent (without odor). The oil-soluble solvent-based curing agent and the water-soluble solvent-based curing agent can also be distinguished from different odors.  (2) Burning: Distinguish between solvent-based protective agent (can or flammable) and completely water-based protective agent (non-flammable).  (3) Look: the curing agent liquid is milky white is emulsion protective agent, colorless is other curing agent. In addition, put the curing agent in a glass and then inject water, the oily curing agent with the water layer; the water-based curing agent is completely fused with the water. (4) Touch: Both silicone type and fluorinated silicon type protective agents have a greasy feel, the acrylic acid type protective agent has a strong sticky feeling, and the silicon acrylic type protective agent is slightly weaker than the acrylic type protective agent Sticky feeling.  (5) Weighing: Weighing in 1L curing agent, under normal circumstances, less than 1 kg is oily; equal to or greater than 1 kg is water.

 

Construction methods

The methods of stone protection construction are: brushing (using a brush), coating (using a sponge), wiping (using a cloth), spraying (using a low-pressure spray gun), soaking (using a dipping tank), roller coating (using a roller), pouring ( Use containers) to wait for seven kinds. When constructing, the method of protective construction must be determined according to the type of stone finish and related protective agent.  (1) Spraying: This construction method is characterized by fast construction speed and uniform coating, which is especially suitable for the construction of mushroom surface stone. But it is wasteful and costly.  (2) Immersion: The main advantage of this construction method is that it can fully protect the inside and outside of the stone, and will not suffer from insufficient penetration like other methods. In all construction methods, only soaking can achieve the best protection effect. However, the cost of the stone is too high due to the inhalation of the protective agent. Therefore, it is required to use some of the most high-quality and low-cost curing agents. Such as: Green Angel brand HB-S103 and so on.  (3) Roll coating, this method is suitable for large-area ground protection construction, when it is used on the wall, the loss is too large. Generally selected for the construction of lower cost curing agent. (4) Cloth rubbing, this construction process is used for lighter stone surfaces, we generally do not advocate this construction method, but if the dosage of cloth coating construction can be enough to protect the stone, it is still a better construction method .  (5) Sponge coating, this process is used on the lighter surface of the stone, which can be coated with a protective agent more uniformly.  (6) Pouring, this process is suitable for various stone surfaces, but the requirements for equipment and venues are high.  (7) Brush brush, this process is suitable for various surfaces, the dosage can be controlled at will, and it is a commonly used better construction method.  The common shortcomings of the above six construction techniques of 1, 3, 4, 5, 6, and 7 are: