14 results about "Phthalonitrile" patented technology

The present disclosure provides a polymerizable thermosetting composition comprising an acetylene-bearing benzoxazine compound and a phthalonitrile monomer. The composition can provide a low viscosity for RTM application and can fully cured at a much lower temperature than the phthalonitrile monomer. The cured thermoset polymers having excellent thermal and mechanical properties, such as high thermal stability, heat resistance, high char yield, and enhanced structural rigidity.

This invention relates to the field of coating technology and discloses a high-bonding-energy rare-earth nano-coating, its preparation method, and its application. The coating of this invention comprises 35-52 parts by weight of silica, 12-23 parts by weight of hydroxide, 0.3-0.8 parts by weight of lanthanum complex, and 26-34 parts by weight of filler, etc. The lanthanum complex tightly bonds the metal substrate to the silicate coating, improving the bonding energy and adhesion strength between the coating and the metal substrate, making the coating less prone to peeling. The lanthanum complex contains phthalonitrile groups. During high-temperature heat treatment, phthalonitrile undergoes self-crosslinking and cyclization to generate phthalocyanine and other aromatic heterocyclic structures with high-temperature resistance, which is beneficial to improving the heat resistance of the coating. Simultaneously, the formed chemical crosslinking system enhances the crosslinking degree within the silicate coating, inhibiting the entry of corrosive media such as acids and alkalis into the coating matrix, and improving the coating's resistance to acid and alkali corrosion.

This invention relates to a method for preparing an ablation-resistant polyarylene ether@zirconium diboride modified boron phenolic-nitrile resin composite material, belonging to the field of organic-inorganic composite polymer technology. This system uses boron phenolic / nitrile resin as the matrix and polyarylene ether@zirconium diboride as the filler, and prepares an ablation-resistant fiber-reinforced resin matrix composite material by hot pressing. The polyarylene ether@zirconium diboride modified boron phenolic-nitrile resin composite material prepared by this invention, on the one hand, introduces copolymerization modification of boron phenolic resin with phthalonitrile containing a benzoxazine ring, which greatly improves the processing performance of the nitrile resin while reducing material costs; on the other hand, the addition of polyarylene ether@zirconium diboride filler further enhances the ablation resistance of the composite material. This method provides a new approach for the development of high-performance ablation-resistant boron phenolic modified nitrile resins.

The application provides a liquid crystal oligomer, a liquid crystal phthalonitrile resin with intrinsic high thermal conductivity and a preparation method and application thereof. The liquid crystal oligomer is obtained by condensation polymerization of the following raw materials: diphenyl ether compounds, biphenyl compounds and nitro phthalonitrile; the raw material of the liquid crystal phthalonitrile resin of the application comprises the liquid crystal oligomer. The liquid crystal phthalonitrile of the application can be used in the fields of aerospace, military and national defense, rail transit, electronic appliances and the like, and is expected to make high-temperature-resistant and high-thermal-conductivity structural parts (such as aerospace vehicles) more lightweight, and can improve the heat dissipation capacity of equipment (such as radars, vehicle-mounted thermal control systems and integrated chips) and maintain the insulation properties, thereby prolonging the service life of the equipment.

The application discloses a liquid crystal type phthalonitrile resin containing arylimine structure and a preparation method and application thereof. The method uses aromatic aldehyde and aromatic amine as starting materials, constructs a monomer or oligomer with arylimine as a rigid crystallographic element and phthalonitrile structure end group through a two-step method or a three-step method, and the obtained phthalonitrile monomer or prepolymer containing arylimine structure has a melting peak and a liquid crystal phase transition peak in a differential scanning calorimetry curve, and presents a liquid crystal texture under a polarizing microscope within a certain temperature range. The liquid crystal type high-temperature-resistant resin can be used in fields of high-frequency high-speed printed circuit board substrates, high-temperature anisotropic heat-conducting / conducting materials and aerospace composite materials.

The application relates to the technical field of benzenedicarbonitrile and discloses a method for hydrogenating benzenedicarbonitrile, which comprises the following steps: (1) in the presence of a supported acid catalyst, carrying out a dehydration reaction on cyanobenzamide in benzenedicarbonitrile containing cyanobenzamide; wherein the supported acid catalyst comprises a first carrier and an acid component supported on the first carrier, and the acid component comprises at least one of phosphoric acid, boric acid and C2-C6 organic acid; (2) in the presence of a hydrogenation catalyst and optional ammonia, contacting the product obtained through the dehydration reaction in step (1) with hydrogen to carry out a hydrogenation reaction. By taking the supported acid catalyst containing a specific acid component as the catalyst for the dehydration reaction of cyanobenzamide, the application can effectively remove the impurity cyanobenzamide in the benzenedicarbonitrile and make the cyanobenzamide generate the benzenedicarbonitrile, and the method disclosed by the application can effectively prolong the service life of the hydrogenation catalyst.

The present disclosure provides a polymerizable thermosetting compositions comprising monofunctional benzoxazine bearing unsaturated functional group, and a monophthalonitrile resin containing unsaturated or amine functional group. The compositions may be cured to form thermoset polymers having improved thermal and mechanical properties, such as a low melting and low viscosity monobenzoxazine. The cured thermoset polymers having excellent thermal and mechanical properties, such as high thermal stability, heat resistance, high char yield, and enhanced structural rigidity.

Phthalonitrile resins and methods of forming phthalonitrile resins are described. The phthalonitrile resin is formed by reacting a primary amine-containing species and a phthalonitrile- containing species with an aldehyde to form a resin compound comprising at least one hexahydrotriazine node having a structure where each of R1, R2 and R3 is independently a backbone of the primary amine-containing species or a backbone of the phthal onitrile-containing species, and at least one of R1, R2 or R3 comprises the backbone of the phthalonitrile-containing species.

This invention relates to the field of aircraft wing surface protection materials, specifically to a high-temperature resistant material for aircraft wing coating and its preparation method. The material is composed of modified phthalonitrile, cyano-modified POSS, N,N-dimethylformamide, a high-temperature resistant dispersant, a silane coupling agent, an anti-settling agent, and a curing catalyst. The modified phthalonitrile is prepared by reacting a rigid-flexible synergistic molecule containing siloxane and benzene ring segments with 4-nitrophthalonitrile; the cyano-modified POSS is obtained by reacting octachloropropyl POSS with potassium ferrocyanide. During preparation, the components are dispersed in a solvent and ground to form a slurry. During the curing process, the material forms a multi-ring cross-linked network containing triazine rings, phthalocyanine rings, and oxazoline ring derivatives through cyano trimerization, and is reinforced by the cage-like structure of POSS, giving the coating excellent high-temperature resistance, low coefficient of thermal expansion, high adhesion, and thermal shock resistance, making it suitable for high-temperature protective coatings on various aircraft wings.

This invention discloses a cyano-based prepolymer thermosetting resin composition and its semi-cured sheet and metal foil laminate, comprising, by weight: 30-90 parts of modified maleimide prepolymer; and 5-60 parts of thermosetting resin. The modified maleimide prepolymer is prepared by reacting an amine modifier with a phthalonitrile compound to obtain a first prepolymer, then adding maleimide resin to the first prepolymer and continuing prepolymerization to obtain the modified maleimide prepolymer. The advantages of this invention are that it effectively reduces the XY axis CTE of the composition, increases the glass transition temperature, and further improves the peel strength.

This invention discloses a nano-deposited, heavy-duty anti-corrosion graphene composite nano-coating, which is composed of the following components by weight: 66-82 parts of a polyimide-toughened polyphthalonitrile resin composition solution; 1-2 parts of nano-calcium silicate; 1-2 parts of nano-silicon nitride; 1-2 parts of graphene; 3-5 parts of 1,3,5-tris(trimethoxysilylpropyl)isocyanurate; 2-3 parts of lead powder; 1-2 parts of chromium carbide powder; 1-2 parts of tungsten powder; 1-2 parts of cobalt powder; 1-2 parts of silicon carbide; 1-2 parts of tungsten carbide powder; 1-2 parts of nickel powder; 1-2 parts of boron powder; 1-2 parts of rhenium powder; 1-2 parts of zirconium carbide powder; and 1-2 parts of zirconium oxide powder. After baking, cross-linking, and curing, the coating forms a powder coating with properties such as high temperature resistance, resistance to rapid heating and cooling, fire resistance and scorching prevention, heat insulation and heat dissipation, resistance to damp heat, salt spray resistance, impact resistance, and low friction.

The present application relates to the field of catalyst regeneration, and discloses a regeneration method of a phthalonitrile hydrogenation catalyst and a phthalonitrile hydrogenation method, which comprises the following steps: (1) using an organic acid solution to regenerate and flush the phthalonitrile hydrogenation catalyst to be regenerated; (2) using an ammonia non-aqueous solution to replace and flush the regenerated catalyst obtained in step (1). The volume space velocity of the organic acid solution and the regeneration flushing time are controlled, so that the polycondensation product on the surface of the catalyst can be effectively removed, the hydrogenation activity of the catalyst is recovered, the service life of the catalyst is improved, and the conversion rate of phthalonitrile in the phthalonitrile hydrogenation reaction can reach more than 90% by using the regenerated phthalonitrile hydrogenation catalyst.

This invention provides a multifunctional phthalonitrile resin containing biphenyl diether and internal alkyne groups, its preparation method, and its applications, belonging to the field of high-temperature thermosetting resin technology. The resin uses polyarylene ether phenylacetylene as a modifier, and through alkyne modification and the introduction of multiple phthalonitrile functional groups, it can achieve dual crosslinking and curing via nitrile cyclization and alkyne addition. The preparation method of the resin is as follows: synthesis of hydroxyl-terminated polyarylene ether phenylacetylene, nitrile end-capping modification, preparation of halogenated phthalonitrile monomers, alkyne-phthalonitrile coupling and purification; the resin is first prepolymerized, then cured after programmed temperature rise. The resin of this invention has a low melting point, a wide processing window, good solubility, a maximum thermal decomposition temperature >530℃ after curing, a high carbon residue at 800℃, and excellent thermo-oxidative stability and ablation resistance. It can be widely used in high-temperature lightweight structural and functional materials fields such as aerospace, hypersonic vehicles, deep space exploration, and advanced thermal protection.