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Silicone Rubber HTV (HCR)
High-Tempertature-Vulcanization (HTV) or High-Consistency Silicone Rubber (HCR) is a special synthetic elastomer that primarly consists of silicone gums having combined properties of organic and inorganic materials, and highly purity of silica. Compared to other organic elastomers, HTV (HCR) silicone rubbers offer superior and excellent properties: heat and cold resistance, resistance to oil and solvent, chemical resistance, gas permeability, physiological inertness, and electrical performances. HTV (HCR) silicone rubbers are widely used in most of all industries such as electrics & electronics, automotive, food & beverage,  and machninery.
Silicone Rubber RTV-1
RTV-1 is a one component Room-Temperature-Vulcanizing (RTV-1) silicone rubber that cures to silicone rubber on exposure to atmospheric moisture at room temperature. RTV-1 performs excellent adhesion to most of all substrates without primers, outstanding weatherability assuring semi-permanent use, and excellent heat resistance suitable for using in the range of -50°C to +200°C. With its excellent electrical properties, RTV-1 is suitable primarily as adhesive, sealant and coating material for various industries such as building materials, automotive, electrics & electronics, home appliances and mechanical.
Classification: Oxime type / Alcohol type
Classification: Resin / Gel
Silicone Rubber RTV-2
RTV-2 is a two-component Room-Temperature-Vulcanizing (RTV-2) silicone rubber. Depending on its curing mechanism, two types of RTV-2 are available: "condensation" cure type and "addition" cure type. The "condensation" cure type RTV-2 is strongly dependent on the catalyst and produces by-products like alcohol, while addition cure type RTV-2 is dependent on temperature and do not produce any by-products.
RTV-2 silicone rubber is capable of deep section cure and its cure rate can be controlled. Also, it provides excellent electrical insulation, heat resistance, cold resistance, weatherability, and impact absorbtion, as the unique features of silicone. These properties result in superior ease of use in various industrial applications and improvement of the quality and productivity of end-products. RTV-2 is used primarily as encapsulant for electrical insulating, for wire sleeving and potting materials for electrics & electronics, compression (vacuum casting) molding and various forming molds.
Classification: Condensation cure / Addition cure
Silicone Rubber LSR
Liquid Silicone Rubber (LSR) is heat curing silicone rubber and used with injection molding methode. It can be cured by liquid injection molding automatically. Thanks to its unique properties, the industrial manufacturers can get higher productivity, cost effectiveness, and delicate articles production. In addition to that, LSR has no by-products and very good mechanical properties. Therefore HTV (HCR) and other organic rubbers are being replaced with LSR in many industrial applications. LSR is primarily used in various industries such as food & beverage (cake mold, ice mold), textile & leather (textile coating), electrics & electronics (keypads, PC keyboard, network, general purpose cable, wire sleeving, IC packaging, optical lens, nose pad, connector seal, wire seal, cable joint, semi-conductive materials, glass fiber coating, primer for key pads), roller, household & home appliances (kitchenware, diving masks, snorkels, baby nipples, baby bottles, teats and soothers, baby toys), medaical (tubes, hoses), automotive (O-rings, hose, insulating parts, gasket, cable), etc.
Addition-curing silicones
- contain platinum as a catalyst
- react without decomposition products (no loss of weight, virtually no odour
- very low shrinkage (< 0.1%)
- considerable acceleration of curing is possible by means of temperature
Condensation-curing silicones
- contain tin as catalyst
- release of ethanol as a decomposition product during curing (odour, loss of weight)
- shrinkage occurs (0.2 - 2%)
- no interruption in vulcanisation through inhibition
Designates curtailing of the vulcanisation process on the contact surface between the model and the casting material. Inhibited silicone does not cure or cures only slowly. There is a risk of inhibition especially for addition-curing silicones.
Shore hardness
Indicates the degree of hardness of the silicone. The higher the level of shore hardness, the harder the substance is. Internationally , various degrees of Shore hardness are measured (Shore A, Shore C, Shore D, Shore 00 hardness).
Penetration value
Indicates the hardness of silicone gels. For this, a cone or a pin is dipped into the gel and the penetration depth is indicated in mm/10. The higher the value, the softer the gel is.
Designates 2-component silicones, if in their blended state, they are so highly viscous (viscid) that they don't run off vertical surfaces.
Designates the heat treatment of a material. For addition-curing silicones, tempering can occur during the vulcanisation process, in order to accelerate the curing.
Pot life / processing time
Indicates the rate of vulcanisation. During that time, the silicone mixture can still be processed.
Demoulding time
Describes the time needed by the silicone to cure without adhesives and to be able to be demoulded.
Elongation at break
Designation fo the elongation in a percentage at the moment at which the silcione ruptures. Essentially, the elongation at rupture is dependent on the Shore hardness. Hard silicones have a greater elongation at rupture.
Tear resistance
Indicates the force needed for a ruptured silicone to rupture further.
A measure of the durability of silicone. Indications are given in milipascal seconds (mPas). The higher the value, the more viscous the silcione is.

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