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LSR,Introduction and application of liquid silica gel

LSR,Introduction and application of liquid silica gel

End group and a non liquid silica gel is relatively solid high temperature vulcanized silicone rubber, the liquid glue, with mobility, fast cure, more safety and environmental protection, can fully meet the food grade requirements. According to the molecular structure containing functional groups (i.e. crosslinking point position, often with the functional groups of the liquid rubber is divided into two major categories: a class is a functional group in molecular structure at both ends of the telechelic liquid rubber; another is the active functional groups in the main chain in a random distribution, the so-called in molecular structure with functional groups, called telechelic liquid rubber. Of course, there are both with intermediate functional group officer corps.
The current focus is to study the telechelic liquid rubber. The liquid rubber, should according to the content of active functional group to choose with appropriate officials to chain growth cross-linking agent or agent.

Liquid silicone rubber can be used as trademarks, products, pacifiers, medical supplies, coating, dipping and pouring. For crystal glue, polyurethane, epoxy resin mold, injection molding, such as cake mold silicone products, electronic components of the moisture, widely used in electronic industry and shipping, coating and encapsulating material insulation. Moisture of electronic components and assemblies, dustproof, shockproof and insulation protection. Such as the use of transparent gel potting electronic components, not only can play a protective effect of shockproof and waterproof, can also see the components and can be replaced by a probe detection element, fault, silica gel broken again. Can also be used to repair. Manufacture of gypsum, wax, epoxy resin, polyester resin, polyurethane resin molding mold and low melting point alloy material, high frequency embossing applied to artificial leather and other surface and bottom shoes, arts and crafts Manufacturing, ceramics, toys, furniture, household appliances and electronic components industry, as well as gypsum, molding of cement materials, wax products molding, modeling, manufacturing, materials, molding, and so on.
Folding edit this paragraph product characteristic
Liquid silicone rubber has excellent transparency, tear strength, resilience, yellowing resistance, thermal stability, waterproof, breathable good heat aging resistance and weather resistance, and moderate viscosity, easy to operate, products with high transparency, see mold filling of casting materials whether there are bubbles and other defects, the linear shrinkage rate is less than or equal to 0.1%, the product size precision replication.
How to use the liquid silica gel
Liquid silicone rubber injection machine production, mainly for infant supplies, medical supplies and electronic products (keys), is a mixture of a / b placed directly into the mold, and then into the bake oven (silica milk production methods of operation), there used to make liquid silica gel and silica gel, glue marks and so on, mainly to see what products you use. General liquid silica gel have been vulcanized in use, but can also be as a filling material in use, such as electric insulating filler, or breast augmentation with the liquid silica gel filling, or as additives in cosmetics use.
Folding edit this paragraph liquid silicone products
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Folding and editing process of this paragraph
For example, viscosity of hydroxyl 0.07~50 pa - second /25 C terminal poly two methyl siloxane, methyl vinyl - pyrrolidone silane as chain extender, organic peroxide, such as two benzoyl peroxide, 25- two 5- methyl tert butyl peroxy hexane as curing agent, the glue material flow is good at the same time, the viscosity is low, the chain growth reaction in the curing process, the elastic body can be obtained with high molecular weight, has good physical and mechanical properties. The chain growth Ji Jiaji vinyl double pyrrolidone pyrrolidone by silane, methyl vinyl chloride and two silane in the presence of three triethylamine, product it is susceptible to hydrolysis, must be stored in a dry container sealed, pyrrolidone group of this compound at room temperature with hydroxyl terminated poly two methyl siloxane in the slow reaction, the reaction rate increased with the increasing of temperature. Theoretically, the reaction can be. Continued, until get the infinite molecular weight. Methyl vinyl pyrrolidone silane vinyl can also as vulcanizing reaction activation point, can promote poly dimethyl siloxane crosslinking, generation of high molecular weight elastomer. Due to pyrrolidone group with a hydroxyl at room temperature reaction slow, so join groups divided into the period of application of the mixed rubber material with a longer, within 1 hour of the viscosity of the sizing is essentially the same, but still maintain a good liquidity, injected tiny pores. After mixing the glue material at 150 DEG C for heat for 10 minutes can be cured into elastic body.
Folding edit this paragraph type
. 1, injection molding liquid silicone rubber (LSR): in full for injection molding liquid silicone rubber, vulcanization equipment for injection molding machine injection molding machine has a process is very simple, do not need high temperature glue in the process of batching, mixing, cutting, pendulum material artificial process, just a worker to take the product, the product has high precision (forming before all manual procedures are to replace the machine) and high yield (A / b glue is mixed at a certain temperature for a few seconds forming), province, electricity saving, material saving and many other advantages, can produce all high temperature glue production products. In the next few years silicon rubber material development mainstream.
2, mold silicone rubber (RTV-2): used for crafts and low alloy molding tool.
3, electronic silicone rubber (RTV-T): used for electrical components of moisture, insulation and heat insulation materials.
4, sealant (RTV-1): commonly known as glass plastic, for the construction of sealing, waterproof engineering, aluminum bonding, electronic and lighting, etc.