3 results about "RTV silicone" patented technology

The present application relates to a kind of flexible silicone heat protection material and preparation method thereof, belong to heat protection material technical field, preparation method includes: the pre-oxidized PAN fiber is woven and prepared PAN fiber braided body;Based on epoxy group modified RTV silicone rubber, the modified PAN fiber braided body with Si-O-C on PAN fiber surface is prepared;Modified PAN fiber braided body impregnated with silicon resin composite system is obtained flexible silicone heat protection material by heating and curing treatment.The present application is modified by epoxy group modified RTV silicone rubber to pre-oxidized PAN fiber, realizes the good compatibility of PAN fiber and RTV silicone rubber, reduces interface delamination, improves the bending strength and stability of flexible silicone heat protection material at high temperature, effectively inhibits the oxidation damage of fiber, reduces linear ablation rate, overcomes the defects of existing flexible silicone heat protection material in prior art, such as poor high-temperature strength and stability, low high-temperature interfacial strength, easy high-temperature delamination failure, low ablation resistance.

The application relates to a modified silicone rubber, a preparation method thereof, an acoustic transmission element and an ultrasonic diagnostic device. The modified silicone rubber comprises an RTV silicone rubber cured product matrix and polystyrene microspheres dispersed in the RTV silicone rubber cured product matrix, the polystyrene microspheres are monodisperse particles, the particle size of the polystyrene microspheres is 1-20 mu m, the RTV silicone rubber cured product matrix accounts for 110-140 parts by mass in the modified silicone rubber, and the polystyrene microspheres account for 15-60 parts by mass. The modified silicone rubber can have low sound attenuation and sound reflection coefficient, good sound impedance matching characteristics and high hardness, is used as the acoustic transmission material of the ultrasonic diagnostic device, has a relatively long service life, can improve the imaging sensitivity and imaging quality of the ultrasonic diagnostic device, and has good practicability.

The invention discloses two-component RTV silicone rubber and a preparation method and application thereof.The two-component RTV silicone rubber is composed of a component A and a component B. The component A comprises vinyl-containing polysiloxane and filler, the component B comprises hydrogen-containing polysiloxane, a cross-linking agent and an organic tin catalyst, and the component A and / or the component B further comprises a microencapsulated phase-change material, the phase change temperature of the phase change material in the microencapsulated phase change material is 25-45 DEG C. The skinning time of the component A and the component B of the two-component RTV silicone rubber in a static mixer is remarkably prolonged, so that the operation time of the silicone rubber is remarkably prolonged, the main curing performance of the silicone rubber can be reserved, and the two-component RTV silicone rubber has extremely high industrial application value.