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939results about How to "High heat resistance" patented technology

Adhesive polyethylene compositions and multi-layer laminated films using the same

Disclosed is a specific adhesive polyethylene composition comprising [1] a modified ethylene/alpha-olefin copolymer resin or elastomer obtained by modifying a specific ethylene/alpha-olefin copolymer resin or elastomer, each of which comprises ethylene and an alpha-olefin of 3 to 20 carbon atoms, with an unsaturated carboxylic acid or anhydride, ester, amide, imide or metallic salt derivative of a unsaturated carboxylic acid thereof, [2] an unmodified ethylene/alpha-olefin copolymer resin and/or an unmodified ethylene/alpha-olefin copolymer elastomer and [3] a tackifier. Also disclosed is a multi-layer laminated film of 3 or more layers in which a layer of the above composition is interposed between an ethylene polymer layer and either a polyamide resin layer, an ethylene/vinyl alcohol copolymer layer or a layer of a mixture of polyamide resin and ethylene/vinyl alcohol copolymer. The adhesive polyethylene composition shows excellent adhesion strength to ethylene polymers, polyamide resins and ethylene/vinyl alcohol copolymers, high heat-sealing strength and heat resistance. The multi-layer laminated film shows excellent strength, heat resistance and gas barrier properties, and besides this film has heat shrinkability, so that the film is suitably used as a shrink film.
Owner:MITSUI CHEM INC

High-temperature resisting methyl vinyl silicone rubber

The invention discloses high-temperature resisting methyl vinyl silicone rubber as well as a prescription and a preparation process thereof. The high-temperature resisting modified silicon rubber material which has more than 300 DEG C of application temperature and can not crack when according with requirements of 550 DEG C, 4mm distance and high-temperature radiation for more than 12 minutes is prepared by adopting the following steps of: adding cerium oxide and polymide into the prescription in which methyl vinyl silicon crude rubber is taken as a rubber raw material to improve the heat-resisting temperature, adding hydroxy silicone oil, dimethyl silicon oil and a silane coupling agent to improve the oil-resisting performance, adding precipitation method white carbon black and gas-phase method white carbon black to improve the tearing-resistance strength, adding quartz power and kieselguhr to improve the tensile strength and matching technical schemes of the preparation process. The high-temperature resisting methyl vinyl silicone rubber overcomes the problems and the defects of poor high-temperature and aging resistance performance and short service life of the common silicone rubber in the prior art, satisfies the special requirements for the heat-resisting performance, the electrical strength and the mechanical strength of automotive rubber products, and ensures that the silicone rubber products achieve the aims of improving the high-temperature resistance performance and prolonging the service life.
Owner:NINGBO GUANGMING RUBBER & PLASTIC

Electronic device and production method thereof

An object is to provide an electronic device of a multilayer structure with high density and high reliability that can be reduced in size while incorporating an electronic component therein, and further provide a production method for easily producing such an electronic device. An electronic device of the present invention includes wiring layers and electrically insulating layers stacked on a core board and establishes predetermined electrical conduction between the wiring layers through upper-lower side conducting vias provided in the electrically insulating layers. An electronic component incorporating layer formed by directly forming on a lower layer an insulating resin layer having a cutout portion for receiving an electronic component therein and upper-lower side conducting vias and by incorporating the electronic component in the cutout portion is provided at least between one of the wiring layers and one of the electrically insulating layers and/or between the core board and the electrically insulating layer. At least the uppermost-layer electronic component incorporating layer of electronic component incorporating layers has a metal frame body surrounding the electronic component and the upper-lower side conducting vias, and a metal cap having a flange portion fixed to the metal frame body of the uppermost-layer electronic component incorporating layer is provided.
Owner:DAI NIPPON PRINTING CO LTD

Method for preparing single-component high-heat-resistance aqueous polyurethane adhesive

The invention discloses a preparation method of a single-component high-heat-resistance aqueous polyurethane adhesive, which comprises the following steps: reacting polyester polyol and nano silicon dioxide with diisocyanate to form an isocyanate group(-NCO)-terminated prepolymer; adding a hydrophilic chain extender and a polylol monomer for further reaction; performing chain extension by using small-molecular-weight glycol; regulating the pH value of the reaction solution by neutralizing with triethylamine, adding acetone in an amount which is 5 to 40 percent based on the weight of the polyester polyol to lower the viscosity of the material, and dispersing the solution into light blue semi-transparent emulsion with deionized water; and finally, removing the acetone serving as the solventunder vacuum to obtain the single-component high-heat-resistance aqueous polyurethane adhesive. The single-component aqueous polyurethane adhesive prepared by the method is environmentally-friendly, the solid content of the single-component aqueous polyurethane adhesive can reach 50 percent, the cohesive strength of the single-component aqueous polyurethane adhesive is high, and the single-component aqueous polyurethane adhesive can meet a high-strength adhesion requirement; and more importantly, the tolerable temperature of the adhesive is as high as over 160 DEG C, and the adhesive can be used without adding a curing agent.
Owner:山西省应用化学研究所

Feed compound enzyme-containing dedicated enzyme for growing pigs and preparation method of feed compound enzyme-containing dedicated enzyme

The invention discloses a feed compound enzyme-containing dedicated enzyme for growing pigs and a preparation method of the feed compound enzyme-containing dedicated enzyme, and belongs to the technical field of preparation of enzyme preparations. The dedicated enzyme for the growing pigs is prepared by scientifically compounding aspergillus niger cultures, acidic xylanase, phytase, beta-dextranase, cellulase, amylase, acid proteinase, Chinese herb extracts, a protective agent and an activating agent, wherein the aspergillus niger cells in the aspergillus niger cultures can inhibit the growth of pathogenic escherichia coli, inhibit the growth and breeding of aspergillus flavus, disintegrate the aspergillus flavus, promote the growth of animals, adjust gastrointestinal tract flora to be balanced, and enhance whole immunity during the processes of growth and fermentation, in addition, the fermentation liquid crude enzyme liquid of the aspergillus niger cultures contains different enzyme activity such as protease activity, mannase activity, alpha-galactase activity and pectinase activity, and the dedicated enzyme is specially suitable for being added in the feed for the growing pigs.
Owner:SHANXI DAYU BIOLOGICAL ENG CO LTD
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