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BRB Sempure HV 6500 is a high-viscosity silicone elastomer material based on polydimethylsiloxane chemistry and supplied as a non-reactive, solvent-free product.
BRB Sempure HV 6500 appears as a clear to slightly hazy, extremely viscous fluid or gum-like material with very high molecular weight.
BRB Sempure HV 6500s structure provides excellent elasticity, flexibility, and thermal stability across a wide temperature range.
CAS Number: 63148-62-9
Molecular Formula: C6H18OSi2
Molecular Weight: 162.38
EINECS Number: 613-156-5
Synonyms: DIETHYL ETHER RECTIFIED;ETHYL ACETATE PESTINORM SUPRA TRACE;SILICONE FLUID;2,2,4,4-TETRAMETHYL-3-OXA-2,4-DISILAPENTANE;BIS(TRIMETHYLSILYL)ETHER;Hexamethyloxy disilane;HMDO;dimethylsilicone fluid
BRB Sempure HV 6500 is designed to deliver superior mechanical reinforcement when incorporated into silicone rubber and elastomer formulations.
Due to its high viscosity, it significantly increases strength, elasticity, and resistance to deformation in cured systems.
BRB Sempure HV 6500 also contributes to improved tear resistance and long-term mechanical durability.
BRB Sempure HV 6500 is characterized by a siloxane backbone that provides outstanding resistance to heat, oxidation, and environmental aging.
BRB Sempure HV 6500 remains stable under UV exposure and does not readily degrade in the presence of moisture or air.
These properties make it suitable for demanding applications where long service life is required.
BRB Sempure HV 6500 is valued for its compatibility with a wide range of silicone fluids, fillers, and additives.
It can be processed using standard silicone compounding techniques despite its very high viscosity.
Its predictable rheological behavior allows formulators to precisely tailor final material properties.
BRB Sempure HV 6500 is a kind of oily linear polysiloxane produced from the hydrolysis and poly-condensation of chlorotrimethylsilane, ethyl chlorosilane, and phenyl chlorosilane containing mono-functional group and bifunctional group.
The commonly called silicone oil means the polydimethylsiloxane and polymethyl phenyl siloxane. Silicone oil is a kind of colorless, odorless, non-toxic, transparent, non-volatile liquid with non-corrosive effect on metal, low freezing point and good anti-water property and moisture resistance, low surface tension and being capable of being resistant to dilute acids and bases and has wide application in various national economy departments.
The viscosity of the silicone oil has small changes with temperature.
At-60~250 °C, it can be used as a lubricant agent for sextant, electromotor, shells aiming system and shipborne radar devices.
When being mixed with thickener such as carbon black and lithium stearate, it can be used for preparation of viscous grease for being applied to vacuum or high temperature sealing systems and the sealing of vacuum cocks, bushings, and valve.
BRB Sempure HV 6500 will not be cured by high compression with a relative high compressibility and can be used as liquid springs of aircraft and used for eliminating flutter in the buffer, shock absorption system to maintain the stability of the gauge pointer in aircraft cabin and damping of damper device.
Because of its non-corrosiveness on metal and long lifespan, it is widely used as hydraulic pressure fluid in various kinds of delivery systems such as being the hydraulic pressure fluid of aircraft landing gear, flaps, doors, and speed brakes; Because of its small density, low viscosity, it can decrease the weight of the hydraulic pressure systems of the aircraft system by 45% compared with the mineral oil system.
BRB Sempure HV 6500 is heat resistant and can be used as the heat transfer medium of-50~250 ℃; it does not absorb moisture and has excellent electrical insulation and can resist high temperature to be used as a dielectric liquid for being applied to the capacitors and the miniature transformer of encapsulating and impregnating.
BRB Sempure HV 6500 is permeable to visible light and can be coated to the lens and optical glass to improve the light transmission properties; its being coated to the motion picture film can reduce the friction and extend the lifespan of the film.
It has a good water resistance and can be used for processing wool, rayon, nylon, cotton fabric and can be used for making waterproof fabric; it has a low surface tension and can be used for plastic and rubber mold releasing agents; in the food and textile industry, it can be used in defoamers.
BRB Sempure HV 6500 is non-toxic with physiologically inertia and can be used for the treatment of flatulence and can also play a role of skin care when added to cosmetics.
BRB Sempure HV 6500 is an easy-to-use aqueous emulsion of high-viscosity and middle-viscosity polydimethylsiloxane.
The unique blend of oils in BRB Sempure HV 6500 brings the best of both worlds.
The mid viscosity oil penetrates into the paper providing outstanding remoistening, the high viscosity oil stays at the top surface of the paper providing extra long lasting gloss and reduces marring, streaking and carbonising.
BRB Sempure HV 6500 is a tailor-made silicone emulsion for offset printing applications.
BRB Sempure HV 6500 has a small particle size of less than 1 micron, which makes it exceptionally dilution stable.
Melting point: −59 °C (lit.)
Boiling point: 101 °C (lit.)
Density: 0.963 g/mL at 25 °C
Glass transition temperature (Tg): −123 °C
Vapor density: >1 (vs air)
Vapor pressure: <5 mm Hg at 25 °C
Refractive index: n²⁰/D 1.377 (lit.)
Flash point: >270 °C (518 °F)
Storage temp.: 2–8 °C
Solubility: Chloroform (slightly); Ethyl acetate (sparingly); Toluene (sparingly)
Form: Oily liquid
Specific gravity: 0.853
Color: Clear, colorless
Odor: Odorless
Viscosity: 60,000 cSt at 25 °C
Water solubility: Practically insoluble
Merck: 14,8495
Dielectric constant: 2.7 (ambient)
Stability: Stable; incompatible with strong oxidizing agents
BRB Sempure HV 6500 International B.V. announces its participation at SEPAWA Congress in Berlin, one of Europe's premier gatherings for the cleansers, detergents, cosmetics, and fragrance industry.
BRB Sempure HV 6500 is a versatile non-ionic aqueous emulsion featuring 60% medium viscosity polydimethylsiloxane.
On the other hand, BRB Sempure HV 6500 LC is a high gloss emulsion containing 60% silicone oil.
These BRB Sempure HV 6500 emulsions serve multiple industrial purposes such as mould release, sizing agent, imparting silky sheen, water repellency, polish ingredient, and lubricating agent.
BRB Sempure HV 6500 is used in silicone rubber and elastomer formulations to improve mechanical strength, elasticity, and tear resistance.
It acts as a reinforcing polymer that enhances the durability of seals, gaskets, and molded silicone parts.
This use is especially important in applications where long-term flexibility and resistance to mechanical stress are required.
In automotive and industrial components, BRB Sempure HV 6500 is incorporated into silicone systems exposed to heat, vibration, and environmental aging.
It helps maintain consistent mechanical performance under harsh operating conditions. Typical applications include hoses, vibration dampers, and protective silicone elements.
In electrical and electronic applications, the material is used in silicone-based insulating and protective compounds.
Its thermal stability and resistance to oxidation support reliable performance in high-temperature environments.
This makes it suitable for cable insulation, encapsulation materials, and protective coatings.
BRB Sempure HV 6500 is also used in specialty silicone formulations such as adhesives, sealants, and soft-touch elastomers.
It allows formulators to adjust viscosity and elastic recovery without compromising stability. These properties are valuable in high-performance and precision-engineered silicone products.
Uses:
BRB Sempure HV 6500 adhesives, lubricants, protective coat- ings, coolants, mold release agents, dielectric fluids, heat transfer, wetting agents and surfac- tants, foam stabilizer for polyurethanes, diffusion pumps, antifoaming agent for liquids, textile fin- ishes, water repellent, weatherproofing concrete, brake fluids, cosmetic items, polishes, foam shields in solar energy collectors, rust preventives.
BRB Sempure HV 6500 coatings, molding compounds, laminates (with glass cloth), filament winding sealants, room- temperature curing cements, electrical insulation, impregnating electric coils, bonding agent, modifier for alkyd resins, vibration-damping devices.
BRB Sempure HV 6500 encapsulation of elec- tronic parts; electrical insulation; gaskets; surgical membranes and implants; automobile engine com- ponents; flexible windows for face masks, air locks, etc.; miscellaneous mechanical products.
BRB Sempure HV 6500 is widely used in silicone rubber compounding to enhance elasticity, tensile strength, and tear resistance of finished elastomer products.
It functions as a reinforcing high-molecular-weight polymer that improves mechanical integrity without sacrificing flexibility.
This makes it suitable for seals, gaskets, O-rings, and molded silicone components.
In automotive and industrial applications, it is used in silicone materials that must withstand high temperatures, vibration, and long-term mechanical stress.
The material helps silicone parts retain their shape and performance under continuous thermal and dynamic loading.
Typical uses include hoses, damping elements, protective covers, and engine-adjacent silicone parts.
In electrical and electronic systems, BRB Sempure HV 6500 is incorporated into silicone insulation and encapsulation formulations.
Its thermal stability and low volatility support reliable electrical protection in high-temperature environments.
These properties are valuable for cable insulation, potting compounds, and protective silicone coatings.
BRB Sempure HV 6500 is also used in specialty silicone adhesives, sealants, and soft elastomer systems to control viscosity and elastic recovery.
By blending it with lower-viscosity silicone fluids, formulators can precisely tailor rheology and mechanical response.
This enables the production of high-performance silicone materials for demanding industrial and technical applications.
In construction and building-related applications, BRB Sempure HV 6500 is used in high-performance silicone sealants that require long-lasting elasticity and weather resistance.
BRB Sempure HV 6500 helps sealants accommodate joint movement without cracking or loss of adhesion.
This is particularly important for façade joints, glazing systems, and expansion joints.
In medical and healthcare-related silicone products, it can be used in non-implantable elastomer components where flexibility, softness, and stability are required.
Its silicone backbone supports repeated deformation without permanent set.
Typical uses include tubing, soft housings, and protective silicone parts, provided regulatory compliance is met.
In consumer and industrial goods, BRB Sempure HV 6500 is applied in soft-touch and tactile silicone materials to enhance feel and resilience.
BRB Sempure HV 6500 improves elastic recovery and surface durability in grips, buttons, and flexible interfaces.
These properties contribute to improved user experience and longer product lifespan.
In specialty molding and extrusion processes, it is used to adjust melt strength and dimensional stability of silicone compounds.
The high molecular weight helps prevent sagging or deformation during processing.
This enables more precise shaping of complex or thin-walled silicone components.
Safety Profile:
BRB Sempure HV 6500 is generally considered to have low acute toxicity and does not present significant health hazards under normal industrial handling conditions.
BRB Sempure HV 6500 is chemically inert and non-reactive, which limits its potential for harmful chemical interactions.
No serious health effects are expected from incidental exposure when standard safety practices are followed.
Prolonged or repeated skin contact may cause mild irritation in sensitive individuals due to its viscous and occlusive nature.
Eye contact can lead to temporary discomfort or blurred vision caused by the physical presence of the material rather than chemical injury.
Inhalation is not considered a significant risk because the product has very low volatility and does not readily form vapors.
From a safety and environmental perspective, BRB Sempure HV 6500 is stable under normal storage and use conditions but may decompose at very high temperatures.
Thermal decomposition can release small amounts of irritating fumes typical of silicone materials.
Proper ventilation during high-temperature processing and routine use of personal protective equipment help minimize any potential handling risks.
