82results about How to "Various structural changes" patented technology

The invention discloses a method for manufacturing a mobile phone casing with a concave side wall, comprising: an external mold manufacturing step, an internal mold manufacturing step, an impregnated fiber layer molding step, a heating forming step and a demolding step. Thus, by using an impregnated resin fiber layer as a forming material of the mobile phone casing, and matched to a forming mold formed by an elastic internal mold and a hard external mold, the method makes the side of the mobile phone casing break through the limit of demolding, so as to provide the mobile phone casing with various side walls, and the usage of the elastic internal mold makes it more reliable and rapider to form the mobile phone casing with the concave side wall, thereby reaching the purpose of form the concave side wall of the mobile phone casing.

The invention discloses a preparation method of polycaprolactone. The method comprises the following steps: mixing a catalyst, an organic solvent and caprolactone; carrying out ring-opening polymerization in the presence of anhydrous and anaerobic inert gases; treating a reactant to obtain polycaprolactone after reacting, wherein the catalyst is an amido anilino group lithium compound. With the amido anilino group lithium compound as a catalyst, the preparation method is good in reaction controllability, mild in condition, high in reaction rate and high in catalytic activity; polymerization reaction can be carried out without adding an alcohol-assisted catalyst; and the obtained polycaprolactone is controllable in molecular weight, high in productivity and few in metal residues. In addition, the polymerization reaction process is simple; a general solution polymerization method can be adopted; through control on polymerization reaction conditions, the molecular weight of the polymer can be regulated and controlled; and the obtained polymer is narrow in molecular weight distribution, has excellent physical and chemical characteristics, and can meet the requirements of the market.

The invention relates to a preparation method of an environmental protection coating of a SiCf/SiC composite material guider blade. The preparation method comprises the following steps: preheating a SiCf/SiC composite material guider blade matrix, and performing PS-PVD (Plasma Spraying-Physical Vapor Deposition) to prepare a Si adhesive layer, a mullite transitional layer, a Yb2SiO5 environmental barrier layer and a La2Zr2O7 heat resistant layer in sequence, wherein the environmental protection coating can be applied to a gas environment at 1,400 to 1,700 DEG C. Preparation of the Si adhesive layer, the mullite transitional layer, the Yb2SiO5 environmental barrier layer and the La2Zr2O7 heat resistant layer of the environmental protection coating is completed on the same equipment; the temperature of the matrix is effectively controlled through heating of a PS-PVD spraying gun, so as to prevent amorphous reaction in a deposition process of the mullite transitional layer; the added heat resistant layer enables the environmental protection coating to adapt to the gas environment at 1,400 to 1,700 DEG C; therefore, the preparation method is applicable to preparation of the environmental protection coating of a high-performance guider blade. The preparation method has the advantages that the preparation process is simple, easy to operate, high in stability, wide in applicable temperature range and wide in application range.

The invention discloses a four-chain amido anilino group ligand, an aluminium compound of the ligand, a preparation method of the ligand and application of the ligand. A constitutional formula of the ligand is shown in a formula A, and an R1 in the formula is alkyl groups of C1-C4 linear chains or branch chain structures. The ligand and the aluminium compound are simple in synthesis, high in product yield and stable in property, simultaneously a catalyst is high in activity, molecular weight of a polymer can be controlled through control of polymerization reaction conditions, selectivity is wide, and market needs can be met.

The invention discloses an engine connecting rod, which comprises a connecting rod body and a connecting rod cover, and the connecting rod body and the connecting rod cover are fixed by bolts. The connecting rod body and the connecting rod cover are provided with mutually intersecting and corresponding convex teeth and grooves, and the connecting rod body and the connecting rod cover are positioned and connected by engaging the convex teeth and the grooves; A cross shape is formed between the grooves; the convex teeth can be involute teeth, trapezoidal tooth shapes, arc tooth shapes or other arbitrary polygonal and arc tooth shapes, and the grooves are some kind of teeth corresponding to the convex teeth shape; the intersecting protruding teeth and grooves on the connecting rod body and the connecting rod cover can be multiple; the beneficial effects of the present invention: the structure changes are rich, and corresponding structures can be set according to different needs; At the same time, the reliability, durability and safety of the engine connecting rod are further improved.

The invention belongs to the field of pharmaceutical chemistry, and particularly relates to pyridazinone compounds as shown in general formula I or isomers thereof or pharmaceutically acceptable salt, ester prodrug or solvate thereof, a preparation method thereof, a medicinal composition and application thereof in preparation of a tyrosine kinase inhibitor (especially c-Met inhibitor). The compounds or the medicinal composition thereof serving as a tyrosine kinase inhibitor (especially c-Met inhibitor) can be used for preventing and/or treating neoplastic diseases related to c-Met abnormality.

The preparation method for Mohr photon crystal comprises: rotating two photon crystals with same periodic structure for some angle to overlap and form the Mohr photon crystal; exactly, using crystal of opal structure opposite to polystyrene or PMMA or silicon dioxide to self-assemble and ordered array into ball of nano or micron level, or using crystal of anti-opal structure opposite to powder dielectric material, or using microtechnique opposite to membrane dielectric material. This invention has variable structure forms to cut cost and improve development and preparation efficiency.

The invention relates to a novel 45-degree wing-angle G-section switch cabinet body which is characterized in that a main body frame adopts a square frame-type structure comprising four stand columns and eight cross beams arranged in an up-down manner; the stand columns are made of reinforced open sections; the cross beams are made of G-sections with 45-degree wing angles; the openings of the sections are inward; the joints of the three parts are subjected to frame mounting by sheet metal tee joint parts; the stand columns are fixed with the cross beams through positioning and fixation of the sheet metal tee joint parts and the positioning holes and indenting counter bores of the stand columns as well as the sheet metal tee joint parts and the positioning holes and indenting counter bores of the cross beams, and positioning of the bayonets of the stand columns and the cross beams; functional modulus square holes and round holes are uniformly formed in the stand columns and the cross beams. The cabinet body adopts the modulus reinforced open sections of 20 mm and the G-sections with the 45-degree wing angles, and is relatively compact and relatively high in utilization rate in comparison with a common modulus design of 25 mm; the square holes and the round holes with the diameters of 5.3 mm are uniformly formed in the central axes of the short edge sides of the sections at an interval of 1/2 modulus.

The invention discloses a method for catalyzing caprolactone polymerization by a binuclear chiral amino imine magnesium complex. The binuclear chiral amino imine magnesium complex is taken as a catalyst, epsilon-caprolactone is taken as a raw material, epsilon-caprolactone polymerization is catalyzed under the anhydrous and anaerobic conditions and under gas protection, and polycaprolactone is obtained. Caprolactone ring-opening polymerization is performed by adopting own developed binuclear chiral amino imine magnesium complex as the catalyst, a preparation method of the binuclear chiral amino imine magnesium complex catalyst is simple, the cost is low, the product yield is high, the catalyst structure is diversified, metal-center magnesium coordinates with N,N atoms of ligands, catalyticactivity is high, a promoter is not needed, the reaction rate is high, and an obtained polymer has narrow molecular weight distribution, controllable molecular weight and high yield.

The invention relates to a novel 45-degree-wing-angle G sectional material switch cabinet. A main body frame of a cabinet body is of a square frame-type structure composed of four stand columns and eight vertical main beams. The stand columns are made of reinforcement type open sectional materials, the main beams are made of 45-degree-wing-angle G sectional materials, and through fixing and positioning between metal plate tee joint parts and positioning holes and indenting counter bores of the stand columns as well as between the metal plate tee joint parts and positioning holes and indenting counter bores of the main beams, and positioning connecting between bayonets of the stand columns and the main beams, the stand columns and the main beams are fixed together. Side beams are fixedly and horizontally installed between the stand columns, and the two ends of each side beam are fixedly installed on the stand columns through protrusive connecting parts. An installing plate is vertically and fixedly installed between every two vertical adjacent side beams, and the two ends of each installing plate are fixedly installed on the corresponding side beam through connecting frames. The four corners of the switch cabinet are of wrapping-connecting assembly structures and are mainly formed by the stand column sectional materials, the main beam sectional materials and the metal plate tee joint parts in an inside and outside matching mode. The tee joint parts are concealed inside the wrapped corners composed of the main beams and the stand columns, the switch cabinet is attractive and flat in shape, the weight is reduced by over 60% compared with tee joint parts made of common aluminum alloy materials in a cast mode, and the cost can be lowered by over 90%.

The invention discloses dual-nucleus chiral amine-imine magnesium complex and a preparation method and application thereof. The dual-nucleus chiral amine-imine magnesium complex has a structural formula shown as formula I, which is shown in the description, wherein R is hydrogen, methyl group, ethyl group or isopropyl group. A dual-nucleus amine-imine catalyst herein is made by one-pot reaction ofa ligand, Mg(nBu)2 and benzyl alcohol; the preparation method is simple; the cost is low; the product yield is high; the compound, the catalyst, herein has variable structure; the metallic center magnesium can be coordinated with N,N atoms of the ligand to form the catalyst for ring-opening polymerization of cyclic lactones; the catalytic activity is high, stereoselectivity is good, no co-catalyst is required, the reaction speed is high, polymerization operation is simple, and the polymerization product has narrow molecular weight distribution, controllable molecular weight and high yield; the catalyst is widely applicable to ring-opening polymerization of cyclic lactones and is very ideal.

The invention discloses a method for catalyzing glycolide polymerization by a binuclear chiral amino imine magnesium complex. The method comprises following steps: the binuclear chiral amino imine magnesium complex is taken as a catalyst, glycolide is taken as a raw material, glycolide polymerization is catalyzed under the anhydrous and anaerobic conditions and under protection of gas, and polyglycollide is obtained; the catalyst is the binuclear chiral amino imine magnesium complex. A glycolide ring-opening polymerization is performed by adopting own developed binuclear chiral amino imine magnesium complex as the catalyst, a preparation method of the catalyst is simple, the cost is low, the structure is diversified, metal-center magnesium coordinates with N,N atoms of ligands, catalytic activity is high, a promoter is not needed, the reaction rate is high, and a polymer has narrow molecular weight distribution and controllable molecular weight.

The invention relates to a multifunctional comfortable desk. The multifunctional comfortable desk is designed to solve the technical problems that books can not be conveniently placed, stored and read on an existing desk which is single in structure. The desk comprises supporting legs and a base. A desk plate is arranged on the base, and a cavity used for containing objects is formed between the desk plate and the base. The multifunctional comfortable desk is characterized in that the desk plate comprises a first desk plate body and a second desk plate body arranged in an overturning mode relative to the base, the second desk plate body is located on the front side of the desk plate, the first desk plate body is connected with the second desk plate body through a hinge, the second desk plate body independently rotates backwards relative to the first desk plate body, and a turnover device is arranged between the second desk plate body and the base; the second desk plate body is used for containing books after being turned over, and therefore a user can read the books and write at the same time conveniently. In addition, the desk can have the functions through the adoption of the combined structure of multi-user desk plates. The multifunctional comfortable desk is diverse in structure, brings convenience to reading and recess learning, is wide in application range for the books, and is suitable for being used as a desk and the structural improvement of the like product.

The invention discloses a chiral aluminum complex containing acetylacetone derivative and a preparation method and application thereof; the chiral aluminum complex has a structural formula shown as formula I that is shown in the description, wherein R1 is trifluoromethyl or methyl, and R2 is phenyl, trifluoromethyl or methyl. The chiral aluminum complex as a catalyst is acquired by subjecting a ligand and trimethylaluminum to reaction; the preparation method is simple, the cost is low, and product yield is high; the chiral aluminum complex has special structure that is variable; divalent N,N,O,O coordination of metallic center aluminum and the ligand may serve as the catalyst for cyclic lactone ring opening polymerization; the catalyst has high catalytic activity, good stereo-selectivity and high reaction speed; polymerization is simple to perform, an obtained polymer has narrow molecular weight distribution, controllable molecular weight and high yield and is widely applicable to cyclic lactone ring opening polymerization and is a very ideal catalyst.