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350 results about "Hard core" patented technology

Preparation method for acrylic acid microemulsion with self-crosslinking core-shell structure

ActiveCN102199239ASmall particle sizeControlling Emulsion StabilityCoatingsEmulsionPolymer science
The invention provides a preparation method for an acrylic acid microemulsion with a self-crosslinking core-shell structure, which sequentially comprises the following steps of: emulsifying a seed microemulsion monomer in advance, preparing seed microemulsion and core-shell part microemulsion, emulsifying a core part microemulsion monomer in advance, and preparing the acrylic acid microemulsion with the self-crosslinking core-shell structure. In the preparation method for the acrylic acid microemulsion with the self-crosslinking core-shell structure, common self-crosslinking monomers are adopted for replacing expensive organo-siloxane monomers and fluoride-containing vinyl monomers, a polymerization technology is used for improving the performance of the emulsion, and therefore, the prepared acrylic acid microemulsion has low cost and can be widely used; the acrylic acid microemulsion with the self-crosslinking core-shell structure, prepared by the invention, has a soft-shell hard-core structure and a self-crosslinking characteristic; the average grain diameter of the microemulsion is 60-100nm; and the acrylic acid microemulsion with the self-crosslinking core-shell structure has good nanometer effects and good grinding performance when being used in aqueous woodware primers, and has advantages of good permeability and wettability to base materials, strong adhesive force, compactness in coating, good transparency, higher gloss and good smoothness.
Owner:东莞大宝化工制品有限公司

Organic silicon modified acrylic ester aqueous wood lacquer latex and synthesizing method thereof

The invention relates to an organic silicon modified acrylic ester aqueous wood lacquer latex and a synthesizing method thereof. The organic silicon modified acrylic ester latex has a three-layer nuclear shell structure latex particle with a hard core and a soft shell, can carry out self crosslinking at room temperature and has the particle diameter of 80-200nm, the solid content of 40-50 percentand the lowest film forming temperature of lower than 40 DEG C. The latex is prepared in such a way that a dicarbonyl compound containing double bonds and a (methyl) acrylic ester crosslinking monomercontaining double functionality or/and polyfunctionality, which can realize a room temperature crosslinking function are led in the polymerization process of acrylic ester nuclear shell latex, and anorganic silicon prepolymer is led in the outermost layer of the shell. The polymerization technology is simple and practical without gel generation in the polymerization process, and the storage stability of the latex can reach more than one year. The synthesized latex can generate an interpenetrating network structure and a self-layering structure during film formation. When the latex is appliedas aqueous wood lacquer, the pencil hardness of a lacquer film is larger than and equal to 2H, and the latex has favorable adhesive force, flexibility, scratch resistance, water resistance, oil resistance and fouling prevention.
Owner:DALIAN POLYTECHNIC UNIVERSITY

Sonic surface wave pressure sensor using composite mold

The invention relates to a surface acoustic wave pressure sensor adopting a compound die, which pertains to the technical field of sensors and comprises a mushroom pressurization cap, a hard-core ball shell pressure guiding metal diaphragm, a metal force guiding column, an overvoltage protective device, a metal shell side wall, a force guiding ejector disk, a force guiding cylinder, a quartz cantilever beam sensitive element, a bottom case and an overvoltage protective device, wherein, the hard-core ball shell pressure guiding metal diaphragm, the metal shell side wall and the bottom case form an air-tight container; the upper surface of the hard-core ball shell pressure guiding metal diaphragm is connected with the mushroom pressurization cap by the metal force guiding column, while the lower surface thereof is fixed with the force guiding ejector disk rigidly connected with the force guiding cylinder; the interior of the force guiding cylinder is provided with the quartz cantilever beam sensitive element; one end of the quartz cantilever beam sensitive element is connected with a blind hole end surface of the force guiding cylinder by glass powder, while the other end thereof is connected with a blind hole of the metal shell side wall by utilizing glass powder. The flexibility of the invention is 15 times higher than the conventional surface wave sensor, and the surface acoustic wave pressure sensor of the invention is suitable for the wireless monitoring of the tire pressure of carts.
Owner:SHANGHAI JIAO TONG UNIV

IP hard core intellectual property protection method and device based on path delay

The invention relates to the field of integrated circuits and aims to provide an IP hard core intellectual property protection method and device based on path delay, wherein the IP hard core intellectual property protection method and device can be used for intellectual property protection of a timing sequence logic which can be applied to input and output and needs multiple delay periods. The IP hard core intellectual property protection method and device can effectively prevent various IP core theft problems, such as a brute force attack, a cleaning attack and reverse engineering. According to the technical scheme, the IP hard core intellectual property protection method based on the path delay comprises the following steps that 1, signals need to pass through a timing sequence logic path circuit of multiple time periods from input to output; 2, a protective path is designed; 3, a designed protective circuit comprises a shifting register, a finite state machine circuit and an interconnecting line, wherein the shifting register is used for storing an initialization secret key, the finite state machine circuit is used for secrete key checking, and the signal delay of the interconnecting line is adjustable; 4, the purpose of protecting a circuit IP is achieved by adjusting and controlling the input and output delay of the protective circuit and the protected circuit. The IP hard core intellectual property protection method and device based on the path delay are mainly applied to integrated circuits.
Owner:TIANJIN UNIV

A method for improving that alignment between a soft bonding plate layer and a hard bonding plate layer

The invention discloses a method for improving the alignment between a soft bonding plate layer and a hard bonding plate layer, which comprises the following steps: manufacturing an inner layer circuit on a soft plate core plate; In the finished soft-hard bonding plate, the soft-board core plate comprises a soft-board area and a soft-hard bonding area; The coating film is pressed on the soft platearea of the soft plate core plate, and then the expansion and contraction coefficient of the soft plate core plate is measured. The inner layer circuit is fabricated on the hard board core board, andthe exposure compensation is carried out according to the expansion and contraction coefficient of the soft board core board when the inner layer circuit is fabricated. Using the same OPE punching machine to drill rivet holes at corresponding riveting positions on the soft plate core plate and the hard plate core plate respectively; Flexible and hard core plates are pre-laminated with non-flowingadhesive PP, riveted by rivets, and then compressed to produce plates. The method of the invention solves the deviation problem of the pressing counterpoint holes caused by pressing the covering film, improves the pressing quality of the soft-hard bonding plate, and reduces the deviation scrap rate of the soft-hard bonding plate layer.
Owner:SHENZHEN SUNTAK MULTILAYER PCB
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