8 results about "RTV silicone" patented technology

The invention relates to the technical field of silicone rubber, in particular to antibacterial room-temperature vulcanized silicone rubber and a preparation method thereof.The method comprises the steps that firstly, betaine salt and an esterification reaction catalyst are mixed and activated, quaternary ammonium salt modified chitosan is added, and a quaternary ammonium salt and betaine salt co-modified chitosan auxiliary is obtained after a reaction; and 2, mixing the required amount of RTV silicone rubber, the quaternary ammonium salt betaine salt co-modified chitosan auxiliary agent and the cross-linking agent, adding a cross-linking catalyst, uniformly mixing, forming a film, drying, and curing to obtain the antibacterial room temperature vulcanized silicone rubber. The antibacterial activity of the RTV silicone rubber is mutually promoted by utilizing quaternary ammonium salt and betaine, the quaternary ammonium salt and betaine co-modified chitosan additive has good compatibility and outstanding antibacterial effect, is green and safe, endows the RTV silicone rubber with excellent antibacterial property, and improves the crosslinking property and mechanical property of the RTV silicone rubber.

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.

Disclosed herein is a protective coating for a thermal protection ablator layer of a high-speed vehicle, the protective coating including a cured room-temperature-vulcanizing (RTV) silicone adhered to the thermal protection ablator layer through siloxane linkages, where the cured RTV silicone is formed from at least one organosilicon compound.

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 relates to a flexible organic silicon thermal protection material and a preparation method thereof, and belongs to the technical field of thermal protection materials.The preparation method comprises the steps that pre-oxidized PAN fibers are woven to prepare a PAN fiber woven body; modifying the PAN fiber woven body based on the epoxy group modified RTV silicone rubber to prepare a modified PAN fiber woven body with Si-O-C on the PAN fiber surface; and heating and curing the modified PAN fiber woven body impregnated with the silicon resin composite system to obtain the flexible organic silicon thermal protection material. According to the invention, the pre-oxidized PAN fiber is modified by adopting the epoxy modified RTV silicone rubber, so that good compatibility of the PAN fiber and the RTV silicone rubber is realized, interface layering is reduced, the bending strength and high-temperature stability of the flexible organic silicon thermal protection material are improved, oxidative damage of the fiber is effectively inhibited, and the linear ablation rate is reduced; the defects of poor high-temperature strength and stability, low high-temperature interface strength, easiness in high-temperature layering failure and low ablation resistance of a flexible organic silicon thermal protection material in the prior art are overcome.

The invention relates to a protective coating for an ablative composition. A protective coating for a thermal protective ablation layer of a high speed vehicle is disclosed, the protective coating comprising a cured room temperature vulcanized (RTV) silicone adhered to the thermal protective ablation layer by a siloxane bond, where the cured RTV silicone is formed from at least one organosilicon compound.

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.

A moldable gripping device for use with a tattoo machine includes a tube and a Room Temperature Vulcanization (RTV) silicone rubber. The tube has a first end, a second end, and an outer surface. A tattoo machine can be inserted into the tube so that the tube is removably secured to the tattoo machine with an operable end of the tattoo machine protruding from the first end of the tube. The RTV silicone rubber comprises a first part and a second part, which are mixable to form a substrate. The substrate is moldable to the outer surface of the tube, deformable by grasping in a hand of a user, and curable to form a custom molded grip. The custom molded grip is substantially nonpliable and is molded to fit the hand of the user.