96 results about "Cyanate ester" patented technology

This invention discloses a heterojunction low-temperature curing silver paste suitable for space HJT battery applications, its preparation, and its application. The heterojunction low-temperature curing silver paste comprises the following components in parts by weight: 75-92 parts of a first conductive powder, 0.5-5 parts of a second conductive powder, 2.25-9.5 parts of a composite resin system, 0.5-4.8 parts of a blocked isocyanate curing agent, 0.05-0.5 parts of a latent accelerator, 0.2-1.8 parts of a coupling agent, 0.3-1.5 parts of a dispersant, and 1.5-6.4 parts of a solvent; the composite resin system comprises epoxy resin and cyanate ester resin, with a mass ratio of epoxy resin to cyanate ester resin of (2-8):1. The silver paste of this invention can form a dense cross-linked network after curing at 150-250℃, while meeting the low outgassing requirements of materials for spacecraft. It can withstand extreme temperature difference cycles from -196℃ to +150℃ and high-energy particle irradiation environments in space, and is suitable for the preparation of metallized electrodes for HJT solar cells in low Earth orbit and medium-high Earth orbit.

This invention relates to the field of thin-film optics, and particularly to a protective film. To address the problem of light stabilizer precipitation at high concentrations, this invention provides a protective film. The protective film sequentially comprises an anti-glare film, an adhesive layer, and a barrier film; the adhesive layer is formed from an adhesive layer coating liquid; the adhesive layer coating liquid comprises an acrylate copolymer, a light stabilizer, an isocyanate curing agent, and a solvent; the light stabilizer has isocyanate groups. The light stabilizer in the adhesive layer of the protective film will not precipitate or migrate.

This invention relates to the field of insulation materials technology, specifically to a high-strength, tear-resistant, halogen-free, flame-retardant insulating material and its preparation method. The high-strength, tear-resistant, halogen-free, flame-retardant insulating material comprises the following components by weight: 70-90 parts EPDM rubber, 5-15 parts thermoplastic elastomer, 15-25 parts medium-density polyethylene, 10-20 parts ethylene-vinyl acetate copolymer, 3-5 parts triallyl isocyanate, 2-4 parts sulfur, 1-3 parts polyethylene wax, 3-5 parts zinc oxide, 1-3 parts antioxidant, 30-50 parts aluminum hydroxide, 20-40 parts modified silica, 0.2-0.5 parts ultraviolet absorber, 1-3 parts accelerator, and 2-4 parts silicone masterbatch. The high-strength, tear-resistant, halogen-free, flame-retardant insulating material prepared by this invention exhibits excellent tensile and tear resistance and flame-retardant properties, thereby extending its service life.

The application discloses a propargyl polysiloxane modified cyanate ester resin and a preparation method and application thereof, and comprises the following steps: S1, a propargyl compound shown in formula I and polysiloxane shown in formula II are subjected to a heating reaction in the presence of a platinum catalyst and a solvent to obtain a propargyl polysiloxane; S2, the propargyl polysiloxane is mixed with a cyanate ester monomer, heated and stirred until a transparent solution is obtained, and subjected to a heat curing treatment to obtain the propargyl polysiloxane modified cyanate ester resin. The propargyl polysiloxane modified cyanate ester resin can be cured and formed at a lower curing temperature, and the prepared modified resin has lower dielectric loss, water absorption, higher impact strength and thermal stability, and has a good application prospect in high-end electronic materials.

A high-temperature resistant lightweight composite material, its preparation method, and its applications are disclosed, relating to the field of composite material technology. This invention solves the problems of existing materials where it is difficult to simultaneously achieve high temperature resistance and lightweight, low structural efficiency due to the separation of heat protection and load-bearing design, insufficient temperature resistance and toughness of the sandwich layer, and difficulties and high costs associated with large-size molding. The material comprises an integrated co-cured outer heat-resistant layer, an intermediate transition layer, and an inner load-bearing layer. The outer heat-resistant layer uses a modified epoxy / cyanate copolymer resin as the matrix and a high-silica glass fiber and carbon fiber blended fabric as reinforcement, with fumed silica and carbon nanotube fillers incorporated into the matrix resin. The intermediate transition layer is polymethacrylamide foam. The inner load-bearing layer uses an epoxy-modified cyanate ester resin as the matrix and a carbon fiber biaxial plain weave fabric as reinforcement. This invention can be used in rocket fairings, hypersonic vehicle skins, spacecraft reentry capsule thermal protection structures, hypersonic missile shells, aircraft engine nacelles, or high-speed train front fairings.

This invention provides a low-temperature resistant epoxy-terminated polyurethane toughened epoxy adhesive and its preparation method, comprising the following steps: Step 1, drying polyol and isocyanate; Step 2, adding the dried polyol, dried isocyanate, and a portion of catalyst at 50-60℃, and stirring; Step 3, continuing to maintain the 50-60℃ condition, adding glycidyl ether and the remaining catalyst, and stirring to obtain an epoxy-terminated polyurethane prepolymer; Step 4, slowly adding epoxy resin and stirring; Step 5, adding a curing agent to react; Step 6, eliminating air bubbles; Step 7, drying to further cure and obtain the epoxy-terminated polyurethane toughened epoxy adhesive. This invention can be used even in ultra-low temperature environments of -196℃, reducing engineering losses and safety issues caused by low-temperature brittle fracture of resin, extending service life, and saving manpower and resources. Simultaneously, the preparation process is simple and requires no complex equipment, and the synthesis temperature is low and easy to control.

This invention discloses a high-strength, tough, and antibacterial polyurethane elastomer and its preparation method. Using polyols as soft segments, isocyanates as hard segments, plant polyphenolic polyols as chain extenders, and iron salts as ligands, a high-performance polyurethane elastomer based on metal ion coordination is prepared. Due to the synergistic effect of the reversible breakage-reorganization mechanism of the dynamic coordination bonds between iron ions and phenolic hydroxyl groups and the separation of the polyurethane microphase, this polyurethane elastomer exhibits excellent mechanical properties. Furthermore, although iron ion coordination reduces the DPPH scavenging rate from 94.17% to 88.89%, it significantly enhances the photothermal conversion performance of the material. After irradiation with 808 nm near-infrared light, the PU-DVO-Fe... 1 / 4 Polyurethane achieved 100% antibacterial rate against both E. coli and S. aureus.

Provided is a method for producing a high-purity ethylenic isocyanate compound, in which (meth)acrylic anhydride is suppressed.　Provided is a method for producing a purified ethylenic isocyanate composition from a crude ethylenic isocyanate composition, wherein an alcohol is added to the crude ethylenic isocyanate composition, and the purified ethylenic isocyanate composition contains a (meth)acrylic acid ester compound which has an isocyanate group, and 0.2 mass% or less of an acid anhydride.　Also provided is an ethylenic isocyanate composition which contains an ethylenic isocyanate compound and 0.2 mass% or less of an acid anhydride.

A polyurethane insulation foam composition is disclosed herein. The polyurethane insulation foam comprises: (i) an aromatic isocyanate compound; (ii) an isocyanate reactive compound; (iii) water; (iv) a tertiary amine compound; (v) a hydrophilic carboxylic acid compound; (vi) a halogenated olefin compound; (vii) a stabilizing compound, and (vii) optionally, other additives.

This invention relates to a composite catalyst containing phenolic hydroxyl and imidazole structures, and a cyanate ester resin system. The catalyst system of this invention comprises compounds containing imidazole and phenolic structures, along with transition metal compounds. The compounds containing imidazole and phenolic structures serve as the hydrogen source for the active hydrogen catalyst and as the support for the transition metal compound catalyst. The cyanate ester resin system of this invention is prepared by mixing cyanate ester resin, a toughening agent, and a high-efficiency catalyst. By using the catalyst, the curing reaction of the cyanate ester resin system is completed under medium-low temperature curing conditions while maintaining the excellent heat resistance of the cyanate ester resin. This cyanate ester resin system can be widely used in aerospace, military, and other fields such as projectile transparent covers, radar domes, satellite solar panels, and space support structures.

The application discloses a black matte epoxy adhesive film for a display module and a preparation method thereof. The adhesive film comprises, in sequence, a light release film layer, a transparent adhesive film layer, a black adhesive film layer and a heavy release film layer. The transparent adhesive film layer and the black adhesive film layer both contain raw materials such as epoxy resin, epoxy curing agent and modified UV resin in a specific ratio. The modified UV resin is prepared from polyol, isocyanate and hydroxy acrylate through a specific process. The black and transparent film layers are prepared by step-by-step preparation of glue, and the four-layer composite structure is formed through roll coating, compounding and weak light curing. The adhesive film has excellent matte effect and ink color consistency, low internal stress, firm adhesion, strong environmental stability, simple and efficient preparation process, small equipment investment, and is suitable for display module packaging requirements and mass production.

The application belongs to the technical field of polyurethane elastomers, and particularly relates to a low-density solvent-resistant anti-shrinkage polyurethane microcellular elastomer as well as a preparation method and application thereof. The low-density solvent-resistant anti-shrinkage polyurethane microcellular elastomer comprises components A and B. The component A comprises the following raw materials: polyester polyol P1, polyester polymer polyol P2, polyester polyol grafted modified silicon dioxide, a chain extender, a leveling agent, a uniform foaming agent, a foaming agent and a catalyst. The component B comprises the following raw materials: polyester polyol P1, a polyether polyol and isocyanate. The application solves the problem of agglomeration of nanoparticles in a full-water foaming system, so that the nanoparticles can migrate to the mold interface together with the leveling agent in the foaming process, and a dense skin layer is jointly constructed. The polyurethane microcellular elastomer prepared by the application has low density, and has thick skin and excellent support. After paint spraying treatment, there are no dimples and air holes, and the polyurethane microcellular elastomer does not shrink after high-temperature heating.

The invention relates to a process for producing hydrophilically modified polyisocyanates having a very low content of monomeric diisocyanates, to the polyisocyanates obtainable or obtained by said process and to the use thereof for producing polyurethane plastics. The invention further relates to coating compositions containing the nonionically hydrophilized polyisocyanates and to the substrates coated with these coating compositions.

The utility model relates to high polymer material processing technical field discloses a kind of raw material mixing uniform devices of full-automatic intermittent foaming machine, including raw material box, the middle part of raw material box is equipped with mixing mechanism, the top of raw material box is fixedly connected with box cover, the bottom of box cover is fixedly connected with sealing gasket, the bottom of sealing gasket is equipped with cleaning assembly, the mixing mechanism includes stirring assembly and scraping assembly, the stirring assembly includes driving motor, the top of the box cover is fixedly connected in the driving motor, the output of driving motor is fixedly connected with shaft, in the utility model, driving motor drives double helix stirring blade one and single helix stirring blade two form convection circulation, and the raw material of different physical properties such as polyol, isocyanate, catalyst, blowing agent is quickly, uniformly mixed to dispersed state, so that different components are fully contacted.

This invention discloses a method for preparing and applying a highly flexible, high-temperature resistant photosensitive resin. The preparation method includes synthesizing an epoxy-containing acrylate resin and a photosensitive resin containing oxazolidinone bonds. A two-step reaction is used to synergistically improve the flexibility and heat resistance of the photosensitive resin: The first step employs RAFT living radical polymerization to precisely control the molecular weight of the acrylate copolymer segments, introducing glycidyl methacrylate to provide side-chain epoxy groups, and adjusting the balance between chain flexibility and rigidity using butyl acrylate and isobornyl ester to obtain a narrowly distributed epoxy-containing acrylate intermediate. The second step utilizes the epoxy group and diphenylmethane diisocyanate to undergo a cyclization addition reaction under a catalyst, generating a highly thermally stable oxazolidinone five-membered heterocyclic structure to impart excellent high-temperature resistance to the resin. The residual isocyanate groups are capped with hydroxy acrylate to introduce photosensitive double bonds, achieving a photosensitive resin with both good adhesion and temperature resistance.

To provide a liquid crystal alignment agent that can produce a liquid crystal element exhibiting good liquid crystal alignment properties, low charge accumulation, and rapid residual charge relaxation, as well as a liquid crystal alignment film with high strength. [Solution] A polymer (A) containing structural units derived from a monomer having a substructure represented by formula (1), and a group F which is at least one selected from the group consisting of polymerizable carbon-carbon unsaturated bond-containing groups, isocyanate groups, protected isocyanate groups, cyclic carbonate groups, groups having a ketene structure, groups having a meldrum acid structure, cyclic ether groups, cyclic thioether groups, oxazoline groups, protected hydroxyalkylamide groups, protected thiol groups, and protected secondary amino groups. 1 A liquid crystal alignment agent containing a compound (B) having a total of two or more of in one molecule and lacking an aromatic ring. In formula (1), Ar 1 and Ar 2 This is a divalent aromatic ring group, etc. 1 X is a hydrogen atom, etc. 1 is -O- etc. TIFF2026087169000033.tif20169

The application discloses a high-glass transition temperature and low internal stress crystal ingot and a preparation method thereof. The crystal ingot comprises, in terms of weight fractions, 80-90 parts of a sulfide compound, 3-10 parts of a multivalent mercaptan, 3-8 parts of a cyanate ester, 0.01-0.08 parts of an initiator, 0.1-0.8 parts of a release agent and 0.1-0.5 parts of UV powder. The internal stress is 10-80 Pa, the size range is greater than or equal to 3 inches, the flatness is less than or equal to 0.1 mm, the parallelism is less than or equal to 0.2 mm, and the thickness is 10-50 mm. The resin crystal ingot has a Tg greater than or equal to 110 DEG C, the size and surface shape stability of the resin crystal ingot under a high-temperature environment is enhanced, the internal stress is less than or equal to 100 Pa, the warpage of the crystal ingot is significantly reduced, and the use requirement of a high-reliability optical device is further met. The resin substrate can be used for bearing semiconductor and optical waveguide chips in the field of VR / AR glasses, and has the advantages of light weight and high optical performance.

This application discloses a combined polyether, a polyurethane composition, a polyurethane foam, and a refrigeration device. The combined polyether comprises a polyether polyol and a filler, wherein the filler comprises an epoxy-based cage-like polysilsesquioxane; wherein at least one organic side chain attached to the silicon atom of the epoxy-based cage-like polysilsesquioxane contains an epoxy group, and at least one epoxy group is located at the end of the organic side chain. The combined polyether provided in this application, by adding an epoxy-based cage-like polysilsesquioxane as a filler, achieves molecular-level dispersion by forming covalent bonds with the hydroxyl groups of the polyether polyol and the -NCO groups of the isocyanate, due to the epoxy active groups contained in this filler. This prevents the thermally conductive filler from agglomerating and migrating. Furthermore, the cage-like structure of the epoxy-based cage-like polysilsesquioxane can effectively capture gas molecules inside the polyurethane foam, inhibiting gas heat conduction and significantly reducing the thermal conductivity of the polyurethane foam at low temperatures.

This invention discloses a high-reliability composite cable for military aircraft and its manufacturing method, comprising an external load-bearing skeleton, an outer protective layer on the surface of the external load-bearing skeleton, an internal conductive core assembly disposed in the internal cavity of the external load-bearing skeleton, and a filling isolation layer between the external load-bearing skeleton and the internal conductive core assembly. This invention proposes a biomimetic skeletal structure, subverting the traditional inside-out layered structure into an outside-in skeleton-medullary cavity structure; the external load-bearing skeleton simultaneously undertakes mechanical protection and electromagnetic shielding functions, while the internal cavity integrates the internal conductive core assembly; PBO fiber, silicon carbide fiber, and OAPS modified cyanate ester work synergistically to achieve a balance of mechanical, thermal, and electrical properties; and an integrated molding process of forming the external load-bearing skeleton, positioning the internal conductive core assembly, and low-pressure injection filling eliminates the multi-layer interface of traditional cables, fundamentally solving the problem of delamination failure; it also possesses ultra-high strength, extreme environmental tolerance, and low-loss signal transmission capability.

The present application relates to the field of LED packaging material, in particular to a kind of high bonding strength epoxy resin packaging glue, preparation method and application.The present application provides a kind of epoxy resin packaging glue, epoxy resin packaging glue includes component A and component B, component A includes the following weight parts of component: epoxy resin 100 parts, antioxidant 0.01~5 parts, filler 1~100 parts, cyanate ester resin 1~100;Component B includes the following weight parts of component: anhydride 100 parts, accelerator 0.01~10 parts and coupling agent 0.01~5 parts.The present application adds cyanate ester resin in epoxy resin packaging glue, can significantly improve the bonding performance of epoxy resin packaging glue.

The present application provides a hybrid running track article, comprising, from top to bottom: (I) a top coating layer made from a first composition comprising an externally emulsified polyurethane dispersion and rubber particles, wherein the externally emulsified polyurethane dispersion is derived from: (Ai) an isocyanate component comprising one or more compounds having at least two isocyanate groups, (Bi) an isocyanate-reactive component comprising one or more compounds having at least two isocyanate-reactive groups; (Ci) an optional catalyst, (Di) an external emulsifier, (Ei) a chain extender and (Fi) water, and (II) a bottom layer made from a second composition comprising a 1K solvent-free polyurethane binder and rubber particles.

The present invention provides a electrostatic roll for electrophotographic equipment that achieves both reduced compression set and reduced wear on the photoreceptor, while also having a surface layer that reduces changes in properties due to moisture absorption. [Solution] The electrophotographic electrostatic roll 10 comprises a shaft 12, an elastic layer 14 formed on the outer surface of the shaft 12, and a surface layer 16 formed on the outer surface of the elastic layer 14, wherein the surface layer 16 includes the following (a) to (c). (a) Crosslinked water-dispersible polyurethane dispersion (b) Crosslinked water-dispersible isocyanates (c) Crosslinked material of water-dispersible polyurethane dispersion and water-dispersible isocyanate

This invention provides a composite coating based on FPEEK, its preparation method, and its application, relating to the field of polymer composite materials technology. The preparation method involves adding polyaspartic acid ester (a polyurea precursor) to an FPEEK solution and dispersing it uniformly, then introducing h-BN and TiO2 inorganic fillers, and finally adding isocyanate to initiate curing. During this process, the in-situ generated polyaspartic acid ester molecular chains interpenetrate and entangle with FPEEK, forming a strong interfacial bond "dual-resin" continuous phase matrix, which greatly enhances the coating's cohesive strength and substrate adhesion. Simultaneously, this composite matrix effectively stabilizes and disperses h-BN and TiO2 nanofillers, preventing their aggregation and ensuring uniform distribution within the coating, synergistically imparting high solar reflectivity and high-to-medium infrared radiation characteristics to the coating.

The application discloses a kind of concrete anticorrosive coating with antibacterial and self-repairing and preparation method thereof, the anticorrosive coating includes the following weight parts of raw materials: 20-50 parts alicyclic epoxy resin, 100-150 parts vinyl resin, 30-50 parts multifunctional curing agent, 5-15 parts polyvinylamine resin, 10-25 parts silicone resin, 1-3 parts silane coupling agent, 0.5-2 parts initiator, 3-8 parts epoxy resin curing agent and 30-50 parts filler;The multifunctional curing agent includes the following weight parts of raw materials: 10-15 parts vinyl epoxy, 15-20 parts allyl thiocyanate and 5-15 parts allyl methyl disulfide.The concrete anticorrosive coating of the application contains multifunctional curing agent, which has thiocyanate group and disulfide group, the thiocyanate group can effectively inhibit the activity of escherichia coli and staphylococcus aureus, prevent escherichia coli and staphylococcus aureus from corroding the coating, and improve the service life of the anticorrosive coating;Disulfide group can undergo reversible rupture and recombination, with self-repairing ability.

The application discloses a variable-temperature curing low-dielectric cyanate ester resin composition, a prepreg and a preparation method thereof. The variable-temperature curing low-dielectric cyanate ester resin composition comprises the following components in parts by weight: 50-100 parts of cyanate ester resin; 15-30 parts of a multifunctional epoxy resin, wherein the multifunctional epoxy resin is a multifunctional glycidyl amine type epoxy resin, and the molecular structure comprises more than three epoxy groups and an aromatic amine skeleton, and the epoxy equivalent is 95-110 g / Eq; 10-20 parts of a toughening agent comprising one or more of polyphenylene ether, polyether ketone, polyether ether ketone, polyarylether ketone and polyether ether ketone containing terminal hydroxyl groups or terminal amino groups; and 0.05-0.1 parts of an accelerator. In-situ grafting reaction of the terminal hydroxyl groups or the terminal amino groups with the cyanate ester system is utilized, macroscopic phase separation of the thermoplastic resin in the curing process is avoided, excellent film-forming property and excellent dielectric property are ensured.

The application belongs to the technical field of refractory materials for blast furnace ironmaking, and particularly relates to a thermal shock cracking resistant taphole clay material and a preparation method thereof. The taphole clay material comprises aggregates, matrix powder and a binder system; the binder system is composed of polysilazane, isocyanate curing agent and B4C micropowder. By introducing polysilazane as the main binder, the application realizes high ceramic yield and low volume shrinkage by using the characteristics of polysilazane being converted into Si-B-C-N ceramic at high temperature. Meanwhile, B4C micropowder is oxidized to generate B2O3 at high temperature, which fills pores, promotes sintering and protects carbon phase, so as to realize volume shrinkage compensation and high temperature strength improvement. The taphole clay material has low shrinkage rate, high cold compressive strength, high high-temperature bending strength and excellent thermal shock cracking resistance, and solves the technical problems of poor volume stability and insufficient high-temperature strength of traditional taphole clay caused by binder carbonization shrinkage.

The present invention provides a composition and a cured layer. The composition comprises 100 parts by weight of a first monomer, 1 to 10 parts by weight of a second monomer, 10 to 30 parts by weight of a polyurethane acrylate, and 15 to 35 parts by weight of a blocked isocyanate, wherein the first monomer is a monoacrylate compound, a monomethacrylate compound, a vinyl aromatic compound, an oxetane compound, maleic anhydride, dicyclopentadiene, N-vinylpyrrolidone, N-vinylformamide, or a combination thereof; and the second monomer is an alcohol compound having at least two reactive functional groups, wherein the reactive functional groups are acrylate groups or methacrylate groups.

This invention discloses a self-healing elastomer, belonging to the field of new materials technology. The invention utilizes a one-pot method to prepare the elastomer using hydroxyl-terminated prepolymers, isocyanates, chain extenders, metal ions, and crosslinking agents. The elastomer contains a rich multi-dynamic network of H bonds, metal coordination bonds, and disulfide bonds, resulting in a self-healing elastomer. This invention reduces the difficulty of preparation and improves the excellent properties of polyurethane elastomers, such as heat resistance and solvent resistance, through crosslinking. Simultaneously, it can achieve rapid self-healing at a low temperature of -10℃ and exhibits good mechanical properties.