1. What is glass glue?

　　Glass glue is a kind of adhesive commonly used in households. The main components are silicic acid (Na2O•mSiO2), acetic acid and organic silicone. Sodium silicate is easy to dissolve in water and has viscosity. It is also called water glass in the south, and soakine in the north.

　　Glass glue is not toxic, but generally corrosive! The scientific name of glass glue is silicone sealant (the entry "silicone sealant" is provided by the industry encyclopedia), which is divided into two types: acidic and neutral. Acid glass glue is mainly used for general bonding between glass and other building materials. The neutral glue overcomes the characteristics of acid glue that corrodes metal materials and reacts with alkaline materials, so it has a wider range of applications, and its market price is slightly higher than that of acid glue.

　　Glass glue is a material for bonding and sealing various glasses with other substrates. It is mainly divided into two categories: silicone rubber and polyurethane (the term "polyurethane" is provided by the industry encyclopedia) rubber (PU). Silicone glue sealant is what we usually call glass glue, which is divided into two types: acid and neutral (neutral glue is divided into: stone sealant, anti-mold sealant, fireproof sealant, pipe sealant, etc.).

　　2. Common types

　　1, single and double component classification

　　Silicone glass glue can be divided into two categories from the product packaging: one-component and two-component. One-component silicone adhesives are cured by contact with moisture in the air to change their physical properties; two-component silicone adhesives are divided into two groups, A and B. Any one of them alone cannot be cured. But once the two sets of glues are mixed, they solidify. One-component silicone glass glue is common in the market.

　　2, acid-base classification

　　Silicone glass glue is divided into acid glue and neutral glue according to its acidity and alkalinity. Acid glass glue is mainly used for general bonding between glass and other building materials. The neutral glue overcomes the characteristics of acid glue that corrodes metal materials and reacts with alkaline materials, so it has a wider range of applications, and its market price is slightly higher than that of acid glue. A special type of neutral glass glue in the market is silicone structural sealant (the term "silicone structural sealant" is provided by the industry encyclopedia), because it is directly used in the metal and glass structure of the glass curtain wall or non-structural Adhesive assembly, so the quality requirements and product grades are the highest in the glass glue, and its market price is also the highest.

　　3, color classification

　　Silicone glass glue has a variety of colors. Commonly used colors are black, porcelain white, transparent, silver gray, gray, and bronze. Other colors can be customized according to customer requirements.

　　4, classification of weather resistance and mildew resistance

　　Weather-resistant silicone sealant is suitable for weather-resistant sealing of various curtain walls, and is especially recommended for weather-resistant sealing of glass curtain walls, aluminum-plastic panel curtain walls, and stone dry hanging. Weather-resistant sealant is suitable for seam sealing between metal, glass, aluminum, ceramic tile, plexiglass, and coated glass; weather-resistant silicone sealant concrete (the entry "concrete" is provided by the industry encyclopedia), cement, masonry, rock, Marble, steel, wood, anodized aluminum and painted (the entry "painting" provided by the industry encyclopedia) aluminum surface joint sealing. In most cases, no primer is needed.

　　Anti-mold silicone sealant is the future trend. The anti-mold silicone adhesive has a longer use time than ordinary glue, is stronger, and is not easy to fall off. It is especially suitable for some humid and mold-prone environments, such as bathroom and kitchen. Wait.

　　Three, performance introduction

　　Glass glue is divided into two types according to its performance: neutral glass glue and acid glass glue. Generally used for home decoration bonding. The places where glass glue is generally used in home decoration are: the dumb mouth on the back of the wooden thread, sanitary ware, toilets, the makeup mirror in the bathroom, the gap between the sink and the wall, etc., these places need to use glass glue with different properties. Neutral glass glue has weak adhesion, and is generally used on the back of bathroom mirrors where strong adhesion is not required. Neutral glass glue is often used in home decoration, mainly because it will not corrode objects, while acid glass glue is generally used on the dumb openings on the back of the wood thread, which has strong adhesion.

　　Four, how to use

　　1. Use: One-component silicone glass glue can be used immediately. It can be easily shot out of the plastic bottle with a glue (the entry "Glue" is provided by Industry Encyclopedia), and it can be trimmed with a spatula or wood chips. surface.

　　2. Sticking time: The curing process of silicone glue develops from the surface inward. The surface drying time and curing time of different characteristics of silicone rubber are different, so if the surface is to be repaired, it must be done before the surface of the glass glue is dried. (Acid glue and neutral transparent glue should generally be within 5-10 minutes, and neutral variegated glue should generally be within 30 minutes). If a color separation paper is used to cover a certain area, it must be removed before the skin is formed after the glue is applied.

　　3. Curing time: The curing time of glass glue increases with the increase in bonding thickness. For example, acid glass glue with a thickness of 12mm may take 3-4 days to solidify, but within 24 hours, there is a 3mm outer layer. Has been cured. When bonding glass, metal or most woods, it has a peel strength of 20 pounds per inch after 72 hours at room temperature. If the place where the glass glue is used is partially or completely closed, then the curing time is determined by the tightness of the seal. In an absolutely airtight place, it is possible to remain uncured forever. If the temperature is increased, the glass glue will become soft. The gap between the metal and the metal bonding surface should not exceed 25mm. In various bonding occasions, including airtight conditions, the bonding effect should be fully checked before the equipment after bonding is used. During the curing process, the acid glass glue will produce a smell due to the volatilization of acetic acid. This smell will disappear during the curing process, and there will be no peculiar smell after curing.

　　4. Bonding: (1) Wipe the metal and plastic surfaces completely to remove oil stains. Then, except for the plastics, rinse all surfaces with acetone first, the rubber surfaces should be polished with sandpaper and then wiped with acetone. When using acetone, please observe the precautions for using this solvent (the term "solvent" is provided by the industry encyclopedia).

　　(2) Spread the glass glue evenly on the surface of the ready object. If you are bonding two surfaces together, you can locate one side first, and then use enough force to squeeze the other side to squeeze out (entry "Extrusion" is provided by Industry Encyclopedia) air, but be careful not to squeeze out the glass glue.

　　(3) Put the bonded device at room temperature and wait for the glass glue to cure.

　　5. Sealing: When silicone glass glue is used for sealing, follow the above steps in the same way, squeeze the glass glue into the joint surface or gap to make the glass glue fully contact the surface.

　　6. ​​Cleaning: The glass glue can be wiped off with a cloth or paper towel before curing. After curing, it must be scraped off with a scraper or scrubbed with solvents such as xylene and acetone.

　　5. Glass glue construction skills:

　　2mm glass seam, the key is that the glue nozzle of the glass glue must be cut well. Make it at a certain bevel, and the caliber should not be too large, and it should be able to just press the gap. After the glue is applied, cover the finger with plastic. (Glue sticks to your hands and is not easy to clean.) Just smooth out the uneven glue. Be careful not to repeat smoothing. It must be done in one go.

　　Features and uses:

　　(1). The quality of glass glue can be investigated in terms of viscosity, tensile strength, mildew proof, easy to clean, and discoloration. From the color point of view, glass glue has various colors, white, black, colored, etc., as well as transparent colors.

　　(2). Acidic silicone glass glue: It has a wide bonding range and has excellent adhesion to most building materials such as glass, aluminum, and oil-free wood. But it cannot be used for bonding ceramics, marble, etc.

　　(3). Neutral silicone glass glue: It can be used to bond ceramic sanitary ware, marble, etc.

　　(4). There are many varieties of glass glue on the market, including acidic glass glue, neutral weathering glue (the entry "neutral weathering glue" is provided by the industry encyclopedia), silicic acid neutral structural glue, and silicone stone glue (words Article "Stone glue" is provided by Industry Encyclopedia), neutral anti-mold glue, hollow glass glue, special glue for aluminum-plastic panels, special glue for aquariums, special glue for large glass, special glue for bathroom mildew, acid structural glue and so on.

　　Six. Removal of glass glue:

　　Glass and stone can be scraped off with a razor blade. The wood veneer should be scraped with a nail first, and the remaining large pieces can be carefully scraped with a razor blade.

　　Seven, storage method

　　Glass glue should be stored in a cool, dry place, below 30℃. A good quality acid glass glue can ensure an effective shelf life of more than 12 months. Generally, acid glass glue can be stored for more than 6 months; neutral weather-resistant and structural glue can guarantee a shelf life of more than 9 months. If the bottle has been opened, please use it up within a short period of time; if the glass glue is not used up, the plastic bottle must be sealed. When using it again, the bottle mouth should be unscrewed to remove all blockages or replace the bottle mouth.

　　8. Matters needing attention

　　1. The most common problem of glass glue is black and mildew. Even the use of waterproof glass glue and mildew proof glass glue cannot completely avoid such problems. Therefore, it is not suitable for construction in places where there is water or flooding for a long time.

　　2. Anyone who knows about glass glue should know that glass glue is an organic substance, which is easily soluble in organic solvents such as grease, xylene, acetone, etc. Therefore, glass glue cannot be applied to substrates containing such substances.

　　3. Ordinary glass glue must be cured with the participation of moisture in the air, except for special and special-purpose glass glue (such as anaerobic glue). Therefore, if the place you want to construct is a confined space and extremely dry, then ordinary glass Glue will not be competent.

　　4. The surface of the glass glue to be bonded to the substrate must be clean and free of other attachments (such as dust, etc.), otherwise the glass glue will not be firmly bonded or fall off after the glass glue is cured.

　　5. The acid glass glue will release irritating gas during the curing process, which can irritate the eyes and respiratory tract. Therefore, you must open the doors and windows after construction, and wait for the gas to be completely cured before you can move in.

　　With the continuous development of China's economy and the continuous improvement of people's quality of life, the market has higher and higher requirements for glass glue products, and glass glue products with good performance, high quality and environmental protection will be favored by people. Glass glue manufacturers and scientific research institutes should increase investment in science and technology according to market demand, and actively research and develop new high-performance, high-quality glass glue products to cope with the competition in the domestic and foreign markets.