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Service > Silicone gel

Silicone gel

PV module production process silica used for PV-specific silicone, silicone laminated components needed for sealing, bonding junction box. The basic structural unit of the silicone product is made of silicon - oxygen (Si-O) chain link constituted by the side chain is bonded to silicon atoms with various other organic groups.
Si-O-Si bond in the main chain lengths, bond angles are large, easy movement of the molecular chain, good low temperature flexibility, excellent thermal stability; Si-O-Si main chain of the polymer structure is a spiral, methyl distributed in the periphery low surface tension, water-repellent, good; excellent electrical insulation properties; high and low temperature (-120 ~ 300 ℃); anti-oxidation, anti-radiation, expansion coefficient; no corrosion, physiologically inert.
Therefore, the structure of silicone products containing both "organic group", also contain "inorganic structure", this particular composition and molecular structure makes it characteristic feature set and inorganic organic matter in one.
First, the function
PV modules used in the production of silicone has two functions, used as a component part of the packaging material, bonded aluminum frame, the component package together, played packaging, cushioning, insulation and so on; the other part is used as adhesive junction box.
1.1, sealing, protection
Components to be installed after the lamination box sealed, silicone PV modules with aluminum alloy frame and tempered glass, backplane, EVA has good adhesion, they can be closely bonded together.
At the same time, play a silicone seal laminate, to prevent moisture penetration, contact EVA, corrosion protection components. Silicone also cushion, reducing external shocks, protecting glass decrepitation role.
In addition, the silicone has good insulation, improve the ability of components of the anti-shock.
1.2, an adhesive junction box
PV modules with silicone for PPO material has good adhesion, making it ideal for bonding junction box, waterproof fire its excellent sealing performance for photovoltaic modules have a very good protection.
Second, the classification
Silicone there are many, can be divided into silicone rubber, silicone, silicone three categories. Wherein the silicone rubber is the most widely used.
Among the many synthetic rubber, silicone rubber is a leader in it. It has a non-toxic, tasteless, not afraid of the cold temperatures and resist characteristics, while Baidu and minus ninety degrees Celsius, "poised", "without blinking an eye," yet still original strength and elasticity. Silicone rubber as well as good electrical insulation properties, resistance to oxygen aging resistance, aging resistance and light mildew resistance, chemical stability. Because of these excellent properties, making silicone rubber to get a very broad and important uses in modern medicine. In recent years, by hospitals, research institutes and factories to work together, a successful trial a variety of silicone rubber medical supplies.
Depending on the silicon atom linked organic group, the silicone rubber has a dimethyl silicone rubber, methyl vinyl silicone rubber, methylphenyl silicone rubber, fluorosilicone rubber, nitrile rubber, silicone rubber, ethylene-ethyl-benzene support many varieties of silicone rubber.
No matter what type of silicone rubber, does not occur when vulcanizing exothermic phenomenon. High-temperature vulcanized silicone rubber is a high molecular weight polysiloxane (molecular weight is generally 40 to 80 million), RTV silicone rubber is generally low molecular weight (3-6 million), at both ends of the molecular chain (sometimes in the middle there), each with One or
Two functional groups, at (moisture in the air or a suitable catalyst) certain conditions, these functional groups may react to form high molecular weight cross-linked structure. RTV silicone rubber vulcanization mechanism can be classified according to their condensation forming and processing;
According to their different curing methods can be divided RTV silicone rubber (including cryogenic vulcanized) and high-temperature vulcanized silicone rubber (HTV) silicone rubber two categories.
2.1, RTV silicone rubber
RTV silicone rubber (RTV) is a sixties advent of a new type of silicone elastomer, the most notable feature of this rubber is no heating at room temperature, such as the pressure can be cured in situ, extremely easy to use. Thus, came on fast become an important part of the silicone products. Now RTV silicone rubber has been widely used as adhesives, sealants, protective coatings, potting and molding materials, in all walks of life has its purpose.
RTV silicone rubber its packaging can be divided into single-component and two-component RTV silicone rubber, according to the curing mechanism can be divided into condensation forming and processing. Therefore, according to RTV silicone rubber composition, curing mechanism and the use of technology can be divided into three types, namely, single-component RTV silicone rubber, two-component condensation-type RTV silicone rubber and two-component RTV silicone rubber molding plus .
These three series of RTV silicone rubber has its own characteristics:
· One-component RTV silicone rubber has the advantage of ease of use, but deep curing speed difficult.
· The advantages of two-component RTV silicone rubber and hold heat when curing, low shrinkage, no swelling, no stress, curing can be carried out simultaneously in the interior and the surface can be deep sulfide.
Addition-curing time · RTV silicone rubber is mainly determined by the temperature, and therefore, can be controlled by temperature adjustment cure rate.
2.1.1, one-component RTV silicone rubber
One-component RTV silicone rubber vulcanization reaction is to rely on the occurrence and effect of moisture in the air and vulcanized into elastomers. With the different chain agents, one-component RTV silicone rubber for deacidification type, oxime type, alcohol type, from amine, amide type and de-de-keto-type, and many other varieties.
Cure time single-component RTV silicone rubber vulcanization system depends on the thickness, temperature, humidity and the silicone rubber layer, improve the environmental temperature and humidity, can make to speed up the curing process. Under typical ambient conditions, typically 15 to 30 minutes, the surface of the silicone rubber may be no adhesive layer thickness of 3mm in one day can be cured. Curing depth and strength in three weeks or so will be gradually increased.
One-component RTV silicone rubber has excellent electrical properties and chemical inertness, and heat resistance, natural aging, flame-resistant, moisture, ventilation and other properties. They can be long-term flexibility in the range of -60 ~ 200 ℃. When curing is not absorbing it, and hold heat, small shrinkage after cure, good adhesion of the material. So, mainly for adhesives and sealants, Other applications include in situ forming gaskets, protective coatings and caulking materials. Many single-component formulations of silicone rubber adhesive exhibits a variety of materials such as most metals, glass, ceramics and automatic adhesive properties on coagulation. When bonding difficulties may progress in the primer to improve the adhesion strength of the substrate, the primer may be a reactive silane monomer or resin, when they are cured on the substrate, is adapted to generate a modified the surface of the silicone adhesive. One-component RTV silicone rubber, although easy to use, but because it is by curing lazy moisture in the atmosphere, the thickness of vulcanized rubber is restricted only for the needs of the occasion thickness 6 mm or less. Vulcanization reaction single-component RTV silicone rubber is carried out from the depth of the surface gradually, the thicker the layer, the slower curing. When the deep need fast curing, curing method can be stratified water gradually, each time adding some plastic materials, such as curing after feeding, thus reducing the total curing time. Adding magnesium can accelerate deep rubber vulcanization.
2.1.2, two-component condensation-type RTV silicone rubber
Two-component RTV silicone rubber vulcanization reaction does not depend on moisture in the air, but by the catalyst to trigger. Usually the compound with the catalyst, respectively, as a component package. Only when the two components are thoroughly mixed together until the beginning of curing occur. Curing time two-component condensation-type RTV silicone rubber is mainly dependent on the type of catalyst, the amount and temperature. The more the faster curing catalyst, while the shorter hold times. At room temperature, hold time is generally several hours, to extend the rubber material of the standing time, the cooling methods are available. Two-component condensation-type RTV silicone rubber rafters at room temperature required to achieve full cure time of a day or so, but at a temperature of 150 ℃ takes only one hour. By using the synergistic effect of promoting agents can significantly improve the cure rate.
Two-component RTV silicone rubber can be kept at a temperature range of -65 ℃ ~ 250 ℃ elasticity, and has excellent electrical properties and chemical stability, the ability of water, ozone resistance, resistance to weathering, combined with the use of simple technology applicability strong, therefore, widely used as a potting and molding materials. A variety of electronic, electrical components with RTV silicone rubber coating, after potting, may play a protective role of moisture (corrosion, shock, etc. You can improve the performance and stability of parameters. Two-component RTV silicone rubber is particularly suitable to do deep irrigation sealing material and has a faster curing time, and this is better than at the single-component RTV silicone rubber. Two-component room temperature vulcanized silicone rubber vulcanization has excellent release properties, with minimal shrinkage during curing, Thus, suitable for making flexible molds for casting epoxy resins, polyester resins, polystyrene, polyurethane, vinyl, wax, low melting point alloy molds.
Two-component RTV silicone rubber in use should pay attention: First, the plastic material and catalyst were weighed, and then mixed in proportion. Mixing process should be handled with care so attached to a minimum amount of gas. After the rubber mixing (uniform color), can be carried out under reduced pressure (vacuum degree 700 mm Hg) after the bubble until the bubble is all discharged removed, at room temperature or a predetermined time at a predetermined temperature that is vulcanized into silicon by standing or rubber.
2.1.3, plus two-component RTV silicone rubber molding
Two-component RTV silicone rubber molding plus elastic silicone gel and silicone rubber points, the former low intensity and high intensity of the latter. Curing mechanism which is based on silicon-hydrogen vinyl (or allyl) a silicone gum on the end groups and the cross-linking agent molecules on the addition reaction (hydrosilation reaction) to complete. In this reaction, does not release by-products. As the cross-linking process does not release low molecular weight material, so add molding RTV silicone rubber does not produce shrinkage during curing. This type of vulcanized rubber non-toxic, high mechanical strength, excellent hydrolytic stability (even under high-pressure steam), good low compression set, low flammability, can cure depth and cure speed can be controlled by temperature, etc. advantages, it is a kind of silicone rubber at home and abroad to develop for.
Two-component RTV silicone rubber can be kept at a temperature range of -65 ℃ ~ 250 ℃ elasticity, and has excellent electrical properties and chemical stability, the ability of water, ozone resistance, resistance to weathering, combined with the use of simple technology applicability strong, therefore, widely used as a potting and molding materials. A variety of electronic, electrical components with RTV silicone rubber coating, after potting, may play a protective role of moisture (corrosion, shock, etc. You can improve the performance and stability of parameters. Two-component RTV silicone rubber is particularly suitable to do deep irrigation sealing material and has a faster curing time, and this is better than the single-component RTV silicone rubber place.
Two-component room temperature vulcanizing silicone rubber vulcanized with excellent release properties, minimal shrinkage during curing.
Two-component RTV silicone rubber in use should pay attention to several specific issues: First, the base material, crosslinking agent and catalyst were weighed, and then mixed in proportion. Usually two components should be provided using different colors, which can visually observe the blend of the two components, the mixing process should be handled with care so attached to a minimum amount of gas. After the rubber mixing (uniform color), can be carried out under reduced pressure (vacuum degree 700 mm Hg) after the bubble until the bubble is all discharged removed, at room temperature or a predetermined time at a predetermined temperature that is vulcanized into silicon by standing or eraser.
Pendant two-component RTV silicone rubber siloxane backbone than methyl, may be substituted with other groups such as phenyl, trifluoropropyl, cyanoethyl, etc., to improve its resistance to low temperature, heat resistance, radiation, or solvent properties. Meanwhile, heat may be added as needed, flame retardant, thermal conductive additives to produce silicone rubber with ablation resistance, flame retardant, thermal and electrical conductivity properties.
2.2, high-temperature vulcanized silicone rubber
High temperature vulcanized silicone rubber (HTV) is a high molecular weight (molecular weight generally from 40 to 800,000) polyorganosiloxane (i.e., raw rubber) was added to the reinforcing fillers and other additives, using an organic peroxide as vulcanizing agent, by press molding (molding, extrusion, calendering), or injection molding, and cross-linking at high temperature into a rubber. This rubber is generally referred to as silicone rubber.
High temperature vulcanized silicone rubber vulcanization is generally divided into two stages, the first stage is silicone rubber, a reinforcing agent, additives, vulcanizing agent and control agent are kneaded, the kneaded material and then pressurized in a metal mold heating the molding and curing, a pressure of 50 kg / cm2, a temperature of 120 ~ 130 ℃, for 10 to 30 minutes, the second stage after the silicon rubber is removed from the mold, were put in an oven at 200 to 250 ℃ bake at a few hours to 24 hours, so that further vulcanized rubber, while the organic peroxide decomposes volatile.
Reinforcing fillers are various types of silicone rubber silica, it can increase tenfold the strength of vulcanized rubber. Various additives mainly to reduce the cost of plastic and rubber materials to improve performance and giving a variety of special properties of vulcanized rubber, such as fire, electrical conductivity, etc.
Cross-linking agents are various organic peroxides such as benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-di t-butyl peroxide, such as hexane.
Control agent is to avoid placing material mix for too long, have a "structured" to make rubber hardens, it is difficult to join the aging process, can be used hydroxy methyl silicone oil or diphenyl hydroxysilane as a control agent .
Pendant on the main chain of the silicone rubber may be methyl, ethyl, vinyl, phenyl, trifluoropropyl. The most commonly used is methyl, other groups can also be introduced to improve the processability and other properties. Therefore, depending on the side groups and rubber formula, you can get a variety of different uses of silicone rubber, and can be divided into the following types: general-purpose (including methyl and vinyl), high temperature and low temperature (including phenyl, methyl and vinyl), low compression set (including methyl and vinyl), low shrinkage (volatiles parts), and solvent (fluorosilicone rubber) and the like.
Third, the components
One-component RTV (RTV) silicone rubber is mixed all the ingredients packaged in a sealed container (hose or tube closure) within a class of silicone products. When using extruded from the sealed container, moisture in the air after contact with a crosslinked elastomer. One-component RTV silicone rubber is generally constituted from the following ingredients:
· Reactive base polymer (commonly known as the gum base) - hydroxy-terminated polydimethyl siloxane organic
Formulas, R typically -CH3, special varieties or -CH2CH2CF3;
· Crosslinkers - multi-functional silane compounds containing hydrolyzable groups;
· Catalyst - diorganotin dicarboxylate, diorganotin (p a diketo ester), titanate chelates and the like;
· Reinforcing agents (filler) - silica, calcium carbonate, diatomaceous earth and the like;
· Plasticizer - nonreactive dimethicone, MDT silicone oil, paraffin mixtures;
· Other - thixotropic agents, tackifiers, moisture scavengers, preservatives, heat resistance additives, such as flame retardants.
3.1, gum base
The so-called gum base refers to a reactive base polymer, silicone is the most basic component, refers to a Si-C bond, and at least one organic group is a compound directly bonded to silicon atoms, through an oxygen often those customarily the organic groups connected to the silicon atom of sulfur compounds, nitrogen, etc. also as an organic silicon compound. Wherein, the silicon-oxygen bond (-Si-O-Si-) for the skeleton composed of the most widely used silicone. Silicone material has a unique structure:
(1) on the Si atom sufficient energy of high methyl polysiloxane backbone shielding;
(2) CH polarity, so that interaction is very weak intermolecular forces;
(3) Si-O bond length is longer, Si-O-Si bond angle is large;
Covalent bond (4) Si-O bond is an ionic bond characteristics of 50% (directional covalent bond, ionic bond non-directional).
The above structure makes the silicone has a low surface tension, viscosity-temperature coefficient, high compression, the basic nature of higher gas permeability.
3.2, crosslinking
A crosslinking agent is silica-based material with the crosslinking reaction, to produce three-dimensional structure, to be glued on the object adsorbed.
More types of silicone rubber crosslinking agents, crosslinking chemical structure is one of the main factors affecting the performance of silicone rubber; different crosslinking agents, crosslinking released during byproduct is different, one-component RTV silicone rubber Sort usual.
The amount of crosslinking agent performance silicone rubber has a great influence. With the increase in the amount of cross-linking agent, the tensile strength of the silicone rubber increased; when the crosslinking agent is increased, the tensile strength will gradually reaches its maximum; later downward trend.
Therefore, adding the crosslinking agent, the crosslinking agent and the silicone rubber cross-linking reaction of macromolecular chain, a crosslinking agent as a crosslinking point macromolecular chains, cross-linking agent will increase the crosslink density of silicon rubber molecule chains improved, so that the silicone rubber is preferably formed of a three-dimensional network structure, having good tensile strength. However, too much crosslinking agent, the junction point will make the density of the silicone rubber molecule chains with a crosslinking agent is increased, the molecular chain is limited, so that the flexibility of the silicone rubber decreased, the performance dropped to an elastic silicone rubber. At this point by the external force, internal stress due to uneven distribution of the silicone rubber, stress concentration occurs, prone to damage during stretching, resulting in lower tensile strength of the silicone rubber
Drop.
3.3, catalyst
Practical application in order to accelerate the crosslinking reaction, usually must be added to the catalyst. Alcohol type RTV - 1 silicone rubber vulcanization The depth from the surface gradually carried out, the amount of catalyst has some influence on the silicone rubber dry time.

With the increase in the amount of catalyst, alcohol type RTV-1 silicone rubber dry time significantly accelerated. When the catalyst amount is less than 20 drops, dry time is very long; but when more than 25 drops, will immediately cured. Thus, controlling the amount of catalyst in 20 ~ 23 drops appropriate.
3.4, reinforcing agents
Silicone rubber with the crosslinking agent directly forming elastic mechanical properties of the poor, not for building sealing, reinforcing fillers and therefore need to be added in order to improve the mechanical properties of the sealant.
With the increase of the added amount of silica, a tensile strength of silicone rubber continues to improve, when the maximum tensile strength is reduced. Silica and silicone rubber molecular chains similar macromolecular chains can form hydrogen bonds with the macromolecular chains between silicone rubber, silicone rubber which can adsorb macromolecular chains, forming a physical adsorption sites. With the increase of the added amount of silica, silica and silicone rubber adsorption points of molecular chains Increases in adsorption is also enhanced, the mechanical strength of the silicone rubber increases. The content of silica is too large, the adsorption section will be gathered in the silicone rubber, aggregated silica to silicone rubber reduced, so that the reinforcing effect is reduced, increased brittleness, when subjected to external force, the tensile strength of the silicone rubber of a downward trend.
In addition, reinforcing agent commonly used for the two materials of silica and calcium carbonate, both in different enhancement mechanism silicone rubber. Silica molecular structure similar to the structure of the main chain of the silicone rubber macromolecules which a large number of S i-OH groups on the surface of the energy-containing, and silicone rubber molecular chain S iO hydrogen bond formation, silica as a physical crosslinking points, so as to achieve the purpose of enhancing. The calcium carbonate is treated by stearic acid calcium carbonate, active calcium carbonate after dispersed in silicone rubber, which long chain molecules stearate entanglement particle surface, forming a loose network structure of the particle surface, thereby Since silicone rubber reinforcement.
Thus the reinforcing effect of silica better than calcium carbonate.
3.5, where the plasticizer is added to the polymer system to make the plastic polymer system (A plastic is under a given load, the material properties of the material to produce permanent deformation) increasing substance can be called a plasticizer.
The main effect is to weaken the secondary plasticizer valence KIN between polymer molecules, i.e., van der Waals forces, thereby increasing the mobility of the polymer chain, reducing the crystallinity of the polymer chain, i.e., increasing the polymer plastic , expressed as polymer hardness, modulus, softening temperature and the brittle temperature drop, and elongation, improved flexibility and flex.
Fourth, the nature of
4.1 Temperature characteristics
Silicone products based on silicon - oxygen (Si-O) bond as the main chain structure, C-C bond energy of 82.6 kcal / mol, the bond energy Si-O bond in the organic silicon is 121 kcal / mol, so the high thermal stability of silicone products, high temperature (or radiation) molecular bond is not broken, do not break down. Silicone is not only high temperature, but also low temperature, can be used over a wide temperature range. Whether it is physical or chemical properties and mechanical properties, changes in temperature are very small.
4.2, weatherability
The main chain of silicone products for -Si-O-, unparalleled key exists, it is not easy to be decomposed by UV and ozone. Better than other silicone polymer material thermal stability and resistance to radiation and weathering capabilities. Silicone natural environment life of up to several decades.
4.3, electrical insulation properties
Silicone products have good electrical insulation properties, dielectric loss, resistance, voltage, resistance, arc resistance, corona, volume resistivity and surface resistivity of the top in the insulating material etc., and their electrical properties affected by temperature and frequency little effect. Thus, they are a stable electrically insulating material, are widely used in electronic, electrical industry. Silicone addition has excellent heat resistance, but also has excellent water repellency, electrical equipment which is used under wet conditions having a high reliability protection.
4.4, physiologically inert
The polysiloxane compound is the most known inactive compound one. They are very resistant to biological aging, and animal body without rejection, and has good anti-clotting properties.
4.5, low surface tension and low surface energy
The main chain of the silicone is very supple, the force between molecules is much weaker than the hydrocarbons, Si-O-Si backbone polymer structure is helical, methyl distributed in the peripheral, low surface tension, good hydrophobicity Therefore, compared with the molecular weight of a low viscosity hydrocarbon, weak surface tension, surface energy is small, the film-forming ability. Such low surface tension and low surface energy is the main reason for many applications it is obtained: the excellent performance of the hydrophobic, anti-foaming, foam stabilizers, anti-sticking, lubricating, polishing and the like.
Fifth, the performance parameters
5.1 dry time
Dry time, commonly known as surface sticky time, refers to the particular ambient temperature and humidity, the silicone rubber is exposed to the atmosphere in the curing process, touch the surface with your fingers, sticky disappeared, not sticky time. Is one of the very important parameter silicone. Dry time is also known as operating time. From the moment of exposure to silica, it began to solidify in the air, so the silicone surface must be consumed before curing, otherwise it will greatly reduce its performance. Single-component silicone curing order is outside to the inside, and it is dry short time, suitable for manual gluing, and two-component silicone for large-scale automated production.
Dry time and the amount of catalyst and silica-related cross-linking agent, the greater the amount of shorter dry time.
In general, dry time control in about 5 ~ 15min, to ensure that there is sufficient operating time.
In addition, one-component silicone dry time is shorter than the two-component silicone.
5.2, the curing time
Curing time is defined as chemical products, liquid adhesive bonding or sealing engineering materials clotting time. After two objects using adhesive bonding, adhesive from liquid to solid solidification time. One-component silicone curing times and relevant ambient humidity, the sulfurization reaction occurs because the one-component silicone absorb moisture from the air at the time of curing. Two-component silicone, when cured, do not absorb moisture. Single, two-component curing silicone, can accelerate the curing temperature and shorten the curing time. In two-component silicone, for example, at room temperature for 24 hours to fully cure, but only at 1 hour at 150 ℃. Thus, the temperature can be controlled silicone curing time.
5.3 Hardness
Silicone hardness refers to the degree of soft and hard after it is fully cured. Silicone has the role of PV modules in the mechanical momentum of the buffer, so the hard and soft silicone cured if moderate, generally require hardness of about 25 ~ 50N / mm2.
5.4, the tensile strength
5.5, the elongation at break
Also known as the breaking elongation, the sample displacement means to pull off when the ratio of the original length. As a percentage (%) said. Usually the stretching process the material is the result of elastic deformation stage, after it reaches the yield point of plastic deformation, fracture occurs after reaching the breaking point.
The elongation at break of said generally refers to the process of elongation, and tensile elongation is generally said that the elongation phase of plastically deformed generated.
5.6 flammability rating
Flame resistance refers to substances with or after the treated material has significantly delayed the spread of flame properties.
Flammability rating by HB, V-2, V-1 to V-0 incremental: HB: UL94 and CSA C22.2 No 0.17 standard lowest level of flame retardant. Requirements for 3-13 mm thick sample, the combustion rate is less than 40 mm per minute; less than 3 mm thick sample, the combustion rate is less than 70 mm per minute; or 100 mm in front of the mark will disappear. V-2: the sample after 10 seconds twice a combustion test, the flame goes out within 60 seconds. Combustion can fall. V-1: the sample after 10 seconds twice a combustion test, the flame goes out within 60 seconds. Can not have combustion fall. V-0: the sample after 10 seconds twice combustion test, the flame goes out within 30 seconds. Can not have combustion fall.
In general, PVF retardant grade V-1, PVDF and THV for V-0. PET can be added to achieve the appropriate parties flame retardant grades.
5.7, the volume resistivity
Volume resistivity is the resistance per unit length, unit cross-sectional area of the conductor. Electrically insulating silicone played the role in the assembly, high voltage protection components are strong electric breakdown. Volume resistivity generally require 1.0 × 1014Ω · cm or more.
Volume resistivity and breakdown strength are two parameters for the same problem, in general, the breakdown strength greater than 18KV / mm.
VI Notes
6.1 Storage
Exposure to environmental silicone curing reaction can occur, especially in one-component silicone, it will absorb moisture from the air when cured. Further, the temperature will accelerate curing silicone. Therefore silicone products should be sealed in a cool, dry environment, storage is usually valid for a year or so.
Have not finished using silicone sealed in a cool dry environment, save time for 24 hours.
6.2 Use
· The bonding surfaces should be kept clean, if the surface of the oil residue will affect bonding.
• Use silicone products in a well-ventilated environment. In case of contact with eyes and skin should immediately wash, scrub clean or treatment by a physician.
· Long-term use in the temperature range of -65 ℃ to 200 ℃. However, in the upper and lower temperature range, the specificity and performance materials can become more complex, you need to go through inspection of parts or components to verify.
· For most active metal, ceramics, glass, resins and plastic bonding firmly, but non-reactive metal or plastic surfaces such as the activity of Teflon, polyethylene or polypropylene material is not of good adhesion. In general, increasing the curing temperature and curing time will increase adhesion.
* Not recommended with oil, plasticizers, solvents, etc. will affect the surface of the cured and bonded directly, using the coating surface need to consider the impact on the coating.
· Deoximation class will be released butanone oxime curing silicone product may have slight corrosion on copper individual cases, it may lead to adverse effects polycarbonate. Recommended before production, assess the suitability of the adhesive
· Products after use, the hose should be sealed, save again.

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