High-temperature heat-transfer oil should not be selected solely according to the “maximum temperature resistance” stated in product literature. The correct sequence is to first confirm the continuous operating temperature, short-term peak temperature, film temperature, and whether the system is open or closed. Then compare low-temperature start-up performance, thermal stability, oxidati

Possibly, but the appearance of the deposited film alone cannot confirm that the contamination comes from a silicone material. When enclosed equipment is heated, volatile substances from silicone oils, adhesives, sealants, lubricating greases, release agents, plastic additives, or cleaning residues may be released and condense on cooler lenses, windows, or sensor surfaces. The corr

Both KH-550 and KH-560 can be considered as silane coupling agents for epoxy composites, but neither can be described as universally superior. KH-560 is an epoxy-functional silane and is generally a strong initial candidate for epoxy resin, glass fiber, and siliceous filler systems. KH-550 is an amino-functional silane with relatively high reactivity. It may participate in epoxy cu

If the primary requirement is flexibility and elastic recovery at extremely low temperatures, phenyl silicone rubber should be evaluated first. If the seal must remain in long-term contact with gasoline, aviation fuel, or other hydrocarbon media, fluorosilicone rubber should generally be evaluated first. When both requirements apply simultaneously, however, the simple rule of “phen

Localized incomplete curing or a tacky surface in platinum-catalyzed addition-cure silicone materials should generally be investigated by checking the mix ratio, mixing uniformity, actual curing temperature, catalyst dosage, raw-material storage conditions, and possible inhibition of the platinum catalyst. When incomplete curing occurs only in specific areas, particular attention s

Whitening after a polysilazane coating has cured usually indicates the formation of microscopic nonuniformities that scatter visible light, such as micropores, microbubbles, localized phase separation, or an uneven inorganic network. These defects may result from excessively rapid hydrolysis, restricted release of reaction gases, excessive wet-film thickness, residual solvent, substrate

Lens fogging is not necessarily caused only by the base silicone oil. Low-molecular-weight siloxanes, residual solvents, curing by-products, insufficiently cured compounds, and other organic substances introduced during assembly may all be released when heated and subsequently condense on cooler lenses or sensor surfaces. The correct approach is to identify the source of contamination fi

Not necessarily. Introducing an appropriate amount of phenyl groups can disrupt the regular arrangement of silicone rubber molecular chains and improve flexibility under certain low-temperature conditions. However, final low-temperature performance is also affected by phenyl content, gum structure, fillers, hardness, curing system and product dimensions. When selecting a material,

Yellowing after the soft finishing of white fabrics may be related to the structure or dosage of the amino silicone oil. However, it may also result from the setting temperature, treatment time, fabric residues, working-bath pH and interactions with other additives. The correct response is not to immediately stop using all amino silicone oils. Instead, use blank controls and step-by-step

The same nominal viscosity of 1,000 cSt only indicates that two silicone oils have similar kinematic viscosity under specified test conditions. It does not prove that their volatility, low-temperature fluidity, high-temperature stability, low-molecular-weight content or compatibility are identical. When changing batches or suppliers, acceptance criteria should be established according to