11 results about "Adipamide" patented technology

The invention belongs to the technical field of high polymer materials and electric power engineering protection, and particularly relates to an MPP power cable protection pipe containing a rare earth anti-aging system and a preparation method of the MPP power cable protection pipe. The protection tube is composed of rare earth coordination modified polypropylene, N, N '-bis (2-hydroxyethyl) adipamide, an antioxidant 1010, a light stabilizer 622, a hindered amine light stabilizer 944, a lubricant and an anti-ultraviolet absorbent. Rare earth ions and polypropylene grafted maleic anhydride form a stable coordination structure, small organic molecules enhance interface bonding through hydroxyl and acylamino hydrogen bonds, and multi-point stability of molecular chains is achieved. The thermal oxidation resistance, ultraviolet aging resistance and thermal deformation resistance of the material are remarkably improved, and the prepared cable protection tube has excellent mechanical strength, heat resistance and long-term weather resistance.

The application belongs to the field of polymer materials and power engineering protection technology, and particularly relates to a MPP power cable protection pipe containing a rare earth anti-aging system and a preparation method thereof. The protection pipe is composed of rare earth coordination modified polypropylene, N,N'-bis(2-hydroxyethyl)adipamide, antioxidant 1010, light stabilizer 622, hindered amine light stabilizer 944, lubricant and ultraviolet absorption agent. Rare earth ions and polypropylene grafted maleic anhydride form a stable coordination structure, and organic small molecules enhance the interface combination through hydrogen bonds of hydroxyl and amide groups, so that the molecular chain is stably connected at multiple points. The application significantly improves the thermal oxidation resistance, ultraviolet aging resistance and thermal deformation performance of the material, and the prepared cable protection pipe has excellent mechanical strength, heat resistance and long-term weather resistance.

The invention relates to the field of engineering plastic composite materials. The invention relates to a low-warpage toughened polyhexamethylene adipamide material and a preparation method thereof. The preparation method comprises the following steps: synergistically compounding polyhexamethylene adipamide, glass fiber, polyhexamethylene adipamide-silicon dioxide reaction composite master batch and maleic anhydride grafted ethylene-1-octylene copolymer master batch, and carrying out reactive extrusion and blending granulation to obtain granules. The warping amount of a flat plate part formed by material injection molding is 0.10-0.60 mm, and the notch impact strength is 8-25 kJ / m. The problem that low warping and toughening of the polyhexamethylene adipamide glass fiber reinforced material are difficult to consider at the same time is solved. The method is suitable for injection molding products.

The invention relates to the technical field of plastics, in particular to an ultrathin micro-texture mobile phone rear cover plate and a preparation method thereof. The method comprises the following steps: carrying out end group regulation on polyhexamethylene adipamide resin through hexamethylene diamine, and carrying out melt blending on the polyhexamethylene adipamide resin, tetraethyl orthosilicate and hydroxyl-terminated polydimethylsiloxane through a sol-gel reaction to obtain hybrid inorganic powder; hydroxyl-terminated polydimethylsiloxane and hexamethylene diisocyanate are sequentially added by adopting a step-by-step feeding strategy for modification. And then molding in a mold with micro textures through an injection molding-compression molding process, and carrying out limited annealing treatment. According to the invention, the problems of incomplete micro-texture copying, easy scratching and poor thermal dimensional stability of the ultrathin plate are effectively solved, and high-precision texture transfer, excellent surface scratch resistance and long-term flatness of the plate with the thickness of 320-380 microns are realized.

This invention provides a continuous preparation method for N,N,N',N'-tetra(2-hydroxyethyl)hexamethylenediamide. Diethanolamine and a sodium methoxide catalyst are mixed in a first mixer, then mixed with dimethyl adipate in a second mixer before entering a continuous reactor for synthesis. After the reaction, the crude product is passed through a falling film evaporator for further reaction and removal of unseparated methanol byproducts, yielding high-purity liquid N,N,N',N'-tetra(2-hydroxyethyl)hexamethylenediamide. Finally, the product is granulated to obtain solid, commercially available granules. This invention solves the problem of continuous production in existing technologies, offering advantages such as short synthesis time, continuous granulation, and elimination of subsequent solidification, crushing, drying, and granulation processes, thus improving equipment efficiency.

The invention discloses a halogen-free flame-retardant polyamide composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The halogen-free flame-retardant polyamide composition is prepared from the following components in parts by weight: 34 to 56 parts of polyterephthalamide resin; 33 to 56 parts of poly (m-xylylenediamine adipate) resin; 4-16 parts of an organic hypophosphite flame retardant; 4-52 parts of flat glass fiber; 4-52 parts of a flaky filler; the mass ratio of the flat glass fibers to the flaky filler is (0.6-4): 1; the flatness ratio of the flat glass fibers is (2-6): 1. The halogen-free flame-retardant polyamide composition disclosed by the invention has excellent mechanical properties and cold and hot impact cracking resistance.

The invention provides a reinforced nylon composite material as well as a preparation method and application thereof, and belongs to the technical field of composite materials. According to the invention, the polyadipyl m-xylylenediamine and the inorganic fiber are used as a composite stiffening agent, so that the strength and modulus of the nylon composite material are enhanced; a main antioxidant, an auxiliary antioxidant and an anti-photoaging agent are introduced into the composite additive, so that the nylon composite material has excellent apparent property and excellent forming stability, the product forming time can be effectively shortened, the size stability can be improved, and the problem that the size is unstable after nylon absorbs moisture is solved; meanwhile, basic magnesium sulfate whiskers in the composite additive are combined, and the basic magnesium sulfate whiskers have the characteristics of high rigidity, low density, low warpage and the like; under the auxiliary action of the composite lubricant, the obtained nylon composite material has the advantages of high strength, high modulus, impact resistance, low warpage, low density, high apparent property, excellent dimensional stability and excellent comprehensive performance, and can be widely applied to materials such as plastics instead of steel.

The application discloses a method for preparing adiponitrile by catalytic dehydration of adipamide. The method comprises the following steps: adding adipamide, a solvent and a catalyst into a reactor, and reacting at normal pressure and at 30-80 DEG C for 0.5-8 hours to obtain product adiponitrile. The catalyst is a supported palladium-based catalyst, and the loading amount is 0.1wt%-5wt%. The method is simple in operation, mild in reaction condition, and can reach 100% of raw material conversion rate and 99.2% of adiponitrile yield; the reaction byproduct is only water, and the atomic utilization rate is high; the catalyst is simple in preparation and easy to recycle, and is green and safe.

This invention discloses a high-barrier biaxially oriented co-extruded film and its preparation method, belonging to the field of membrane material processing technology. It addresses the technical problem that the mechanical strength and barrier properties of existing co-extruded films need further improvement. The invention comprises the following components by weight: 60-70 parts polyethylene terephthalate, 30-40 parts poly(m-phenylene adipamide), 25-35 parts composite polyester, 17-23 parts composite polyolefin, and 12-15 parts modified montmorillonite. This invention uses polyethylene terephthalate and poly(m-phenylene adipamide) as base materials to prepare a composite polyester containing rigid polyester segments, a composite polyolefin with good flexibility, and modified montmorillonite with good reactivity to reinforce the base material. This not only effectively improves the oxygen and water vapor barrier properties of the co-extruded film but also enhances its mechanical properties.

The present application relates to the field of vehicles, and particularly discloses a fuel valve (1) for a fuel tank, which fuel valve (1) comprises a tube body (11) comprising a fuel barrier structure formed of polyhexamethylene adipamide adapted to radially block the outward penetration of fuel, and an annular flange (12) protruding radially outward from the outer periphery of the tube body (11), the annular flange (12) having a flange body (121) and a welding structure (122) adapted to be welded to the shell (101) of the fuel tank (10), wherein the welding structure (122) is connected with the flange body (121) by being embedded in or coated on the flange body (121). The present application also discloses a corresponding manufacturing method. According to certain exemplary embodiments of the present application, the fuel valve (1) is simpler in structure, easier to manufacture, and can significantly reduce the cost, and even the performance is improved.

An aqueous binder solution for nonwoven mats such as insulation comprises a polycarboxylate polymer and a beta-hydroxyalkylamide hardener, such as N, N, N', N'-tetrakis-(beta-hydroxyethyl)adipamide, in an acidic solution. The polycarboxylate polymer is made using a phosphorus-containing accelerator. The solution has a pH below 3.