3results about How to "Wide damping temperature range" patented technology

The utility model discloses a diaphragm for sounding device, sounding device and electronic equipment. The diaphragm includes at least one thermoplastic polyurethane elastomer alloy layer, and the thermoplastic polyurethane elastomer alloy layer includes first thermoplastic polyurethane elastomer and second thermoplastic polyurethane elastomer. The glass transition temperature of the first thermoplastic polyurethane elastomer is -60 to -30 DEG C, and the glass transition temperature of the second thermoplastic polyurethane elastomer is -25 to 10 DEG C. The thermoplastic polyurethane elastomer alloy layer of the utility model includes thermoplastic polyurethane elastomer of different glass transition temperatures, can effectively expand the damping temperature zone of diaphragm, and diaphragm can keep good damping under the condition of wider frequency interval in the wider use temperature range.

The invention relates to a polyacrylate coating, a preparation method thereof, a battery and an electric device. The polyacrylate coating is prepared from the following raw material components in parts by weight: 40 to 70 parts of acrylate copolymer emulsion, 10 to 25 parts of flame-retardant filler, 0.5 to 5 parts of adhesion promoter and 10 to 45 parts of water, the acrylate copolymer emulsion is prepared by emulsion copolymerization of an acrylate monomer, an alkyl ester monomer, a nitrogen-containing monomer and a phosphorus-containing monomer in the presence of an initiator, and an emulsifier adopted in emulsion copolymerization comprises a phosphorus-containing anionic emulsifier and a nitrogen-containing nonionic emulsifier; the chain length of alkyl in the alkyl ester monomer is C10-C18. The polyacrylate coating has good damping and flame retardant properties.

This invention relates to the field of silicone rubber materials technology, specifically to a wide-temperature-range pressure-heated silicone rubber material for automobiles and its preparation method. The automotive wide-temperature-range pressure-heated silicone rubber material comprises the following raw materials: by weight, 40-60 parts liquid silicone rubber, 30-50 parts phase change energy storage system, 3-8 parts damping reinforcing filler, 2-5 parts antifreeze modifier, 1-3 parts silane coupling agent, 1-3 parts flame retardant synergist, and 0.5-1.5 parts platinum catalyst. The automotive wide-temperature-range pressure-heated silicone rubber material prepared by this invention possesses pressure-triggered self-heating characteristics, along with wide-temperature-range stability, excellent damping and vibration reduction performance, and compliance with safety standards.