535 results about "Cyanate ester" patented technology

The invention discloses an aircraft fairing and a fairing body composite material integrated forming process, and relates to the technical field of aviation equipment manufacturing. The forming process comprises the following steps: 1) preparing a prepreg; (2) sectional forming; 3) a curing process; (4) demolding and trimming; 5) an assembly process; the whole of the front section, the middle section and the tail section of the fairing is of a long-size U-shaped streamline structure. According to the invention, through molecular collaborative design of fluorination modification-polysiloxane toughening-cyanate ester interpenetration, the key contradiction of a high-performance fairing material is systematically solved; ultrahigh strength and toughness are realized at the same time by utilizing in-situ nano microphase separation; a dense graphite carbon layer is generated through catalysis, so that efficient halogen-free flame retardance is achieved; by means of the partition design of molecular fluorination and surface metallization, the high wave transmission and lightning protection functions are ingeniously unified. And finally, a new generation of aircraft fairing composite material with force bearing, wave transmission, heat resistance, impact resistance and environmental stability is successfully prepared.

The invention belongs to the technical field of polyurethane, and provides polyurethane resin, polyurethane gloves and a preparation method and application thereof. The polyurethane resin is prepared from the following raw materials in percentage by mass: 5%-12.5% of modified organic silicon polyol, 5%-12.5% of bio-based polyol, 5%-8% of isocyanate, 0.01%-0.02% of an antioxidant, 0.001%-0.002% of a catalyst, 1%-2% of a chain extender, 0.1%-0.7% of polyether polyol, 0.02%-0.05% of a terminating agent and 71%-75% of a solvent, the preparation raw materials of the modified organic silicon polyol comprise a dihydroxyl-terminated organic silicon prepolymer and binary acid. The polyurethane glove prepared by compounding two specific polyhydric alcohol modified organic silicon polyhydric alcohol and bio-based polyhydric alcohol as well as other substances has good wear resistance and fingerprint-free characteristic, is easy to demould, and is suitable for the field of automobile film and chip manufacturing.

The technology of the present disclosure generally relates to the field of power storage devices, and more specifically to a solid electrolyte, an electrode, a solid-state battery, and a method for producing the same. An aspect of the present disclosure relates to a process for producing a solid electrolyte, comprising the steps of: - contacting, in the presence of a catalyst: - a polymer precursor compound comprising polyethylene glycol (PEG) and / or polytetrahydrofuran (PTHF), wherein the polymer precursor compound comprises on average per polymer precursor molecule, -at least 2.0 alkoxysilyl functional groups, with a functionality of at least 2.0, preferably at least 2.5, preferably at least 3.0; and / or -at least 1.0 alkoxysilyl functional groups, with a functionality of at least 3.0; - optionally, an organo-tri-alkoxy silane, an organo-tetra-alkoxy silane, and / or a mixture thereof comprising a metal ion (M+) chelating moiety being a cyanurate, a crown ether, an aza-crown ether, a thia-crown ether, a cryptand, a carbamate, a cyano group, a thiocyanate group, or a metallacrown,, - a metal (M+) salt, preferably does the metal salt comprises Li+, Na+, Mg+, Ca+, Al+, and / or a combination thereof, preferably lithium (Li+); - a solvent, preferably an organic solvent; and, - optionally, an ionically conductive compound; thereby obtaining a solid electrolyte; - optionally, drying the obtained solid electrolyte.

The invention belongs to the technical field of composite material manufacturing, and particularly relates to a POSS (Polyhedral Oligomeric Silsesquioxane) grafted polyimide flexibilizer and toughened modified cyanate ester resin as well as a preparation method and application thereof. Polyimide is grafted and modified through POSS, the POSS grafted polyimide flexibilizer is prepared, toughening modification of cyanate ester resin is achieved through cooperation of a molecular chain flexible structure of polyimide and a cage-shaped structure of nanoparticles of POSS, and the toughness of the cyanate ester resin is improved; meanwhile, the dielectric property and the mechanical property of the cyanate ester resin are improved, and the toughening modified cyanate ester resin keeps good heat resistance.

The invention relates to the technical field of epoxy resin-based coating compositions, and discloses an isocyanate and organosilicon composite modified epoxy resin-based closed prime coating, which comprises a component A: composite modified epoxy resin; the component B is a curing agent; the component C is a ceramic filler; and the component A is prepared by mixing isocyanate, an organic silicon monomer and epoxy resin. The closed prime paint disclosed by the invention is beneficial to reducing coating shedding, prolonging the service life of the coating and reducing the frequency of maintenance and replacement.

An organosiloxane has formula (I), wherein each subscript n independently has an average value of 2 to 18, each R1 is an independently selected monovalent hydrocarbyl group; each R is independently selected from H or a functional group containing a moiety selected from an acrylate group, an alcohol group, an alkoxy group, an epoxy group, an isocyanate group, a methacrylate group, or a urethane group; each D is an independently selected divalent hydrocarbyl group of 2 to 6 carbon atoms; and L an organosilicon linker. The organosiloxane is useful in various application such as a crosslinker or a co-crosslinker in silicone release coating compositions or an adhesion promoter in curable liquid silicone rubber compositions.

The invention discloses a low dimer modified isocyanate composition and a preparation method thereof. The content of dimers in the modified isocyanate is reduced to 0.9 wt% or below mainly by controlling the reaction temperature of carbodiimide, the cooling rate after the reaction and the curing temperature. Through the method, the storage time of the modified isocyanate can be prolonged, and the stability of the modified isocyanate product is improved.

This invention discloses a Janus particle crosslinking agent, a two-step preparation method, and its applications, belonging to the field of functional coating technology. The Janus particle crosslinking agent comprises SiO2 particles, one end of which is modified with a hydrophilic isocyanate group, and the other end with a low surface energy material, hydrogen-containing silicone oil. The Janus particle crosslinking agent with the hydrogen-containing silicone oil as the hydrophobic side can achieve directional arrangement, thereby imparting excellent hydrophobic properties to the coating. Utilizing the isocyanate group of the Janus particle crosslinking agent, it can not only exert its crosslinking effect in the coating but also stabilize the toluene / water Pickering emulsion. The two-step preparation method involves using hydrogen-containing silicone oil as a modifier to prepare J(SiO2·PMHS) particles via the Pickering emulsion interface method; then, using isocyanate propyltriethoxysilane as a modifier, a one-pot method is used to prepare the Janus particle crosslinking agent with the isocyanate group as the hydrophilic end and the hydrogen-containing silicone oil as the hydrophobic end. The isocyanate groups in the crosslinking agent are directly modified on one side of the Janus particles, thereby enabling them to play their crosslinking role in the coating and improving the wear resistance of the coating.

The invention relates to a glass fiber impregnating compound, a low dielectric glass fiber and a cyanate ester resin-based wave-transparent composite material, and belongs to the technical field of glass fiber impregnating compounds, the glass fiber impregnating compound comprises the following components by mass: 35-50 parts of a low molecular weight epoxy emulsion, the molecular weight of epoxy resin in the low molecular weight epoxy emulsion being 400-600; 5-15 parts of a high molecular weight epoxy emulsion, wherein the molecular weight of epoxy resin in the high molecular weight epoxy emulsion is 5000-8000; 5-10 parts of a low molecular weight polypropylene emulsion, wherein the molecular weight of polypropylene in the low molecular weight polypropylene emulsion is 2000-3000; 20 to 25 parts of a lubricant; 15-20 parts of a silane coupling agent, wherein the silane coupling agent comprises a main silane coupling agent and an auxiliary silane coupling agent; and 0.1 to 0.3 part of graphene. The impregnating compound provided by the invention has good compatibility and interface bonding strength with a cyanate ester resin matrix.

This invention provides a temperature-resistant shape memory polymer plugging agent, its preparation method, and its application, belonging to the field of oil and gas drilling technology. The preparation method of this plugging agent includes the following steps: mixing acetic acid and perchloric acid to obtain a mixed acid, then adding bromate, potassium permanganate, and natural flake graphite, and stirring to obtain low-temperature expanded graphite; mixing cyanate ester, linear aliphatic epoxy resin, and an active diluent, then adding low-temperature expanded graphite, organotin compounds, and amine catalysts, and carrying out a curing reaction to obtain a temperature-resistant shape memory polymer material; testing the glass transition temperature (Tg) of the synthesized temperature-resistant shape memory polymer material, compressing it at (Tg+5)~(Tg+10)℃, and then cooling, pulverizing, and granulating to obtain the final product. The plugging agent of this invention can rapidly recover its original shape at high temperatures, accumulate and seal leakage channels, and form a high-strength sealing layer in fractures, meeting the requirements of safe and efficient drilling.

A polishing pad having a polishing layer with a polishing surface, wherein the polishing layer comprises a reaction product of an isocyanate-terminated prepolymer in combination with a curative composition, wherein the curative composition comprises a polyamine and a polyether polyol having a kinematic viscosity at 40°C between 130 cSt and 1100 cSt and a ratio of kinematic viscosity at 40°C to kinematic viscosity at 25°C between 0.1 and 0.7; by controlling the kinematic viscosity of the polyether polyol in the curative composition at a temperature and the ratio of the kinematic viscosity at different temperatures, a polishing pad having a higher polishing rate, lower defects, and lower polishing rate non-uniformity is produced.

The application discloses a modified polyurethane water-based functional coating and a preparation process thereof, and belongs to the technical field of water-based functional coatings. In the application, N,N-dimethylethanolamine is used as a blocking agent to block the isocyanate prepolymer, so that a latent type blocked isocyanate water-based polyurethane emulsion is prepared; lactide monomers, epoxy group grafted modified nano silicon dioxide and amino functionalized light stabilizer microcapsules are added into the emulsion; curing is carried out by using a two-stage process, that is, after preheating and water removal and film formation, 130-150 DEG C baking is carried out to trigger the deblocking of the DMEA blocked isocyanate, and the tertiary amine groups in the deblocked DMEA molecules immediately initiate the ring-opening polymerization of the premixed lactide monomers in the system in situ to generate polylactic acid segments which are chemically grafted to the crosslinked network. The application realizes the synchronous linkage of crosslinking and curing and polymer toughening, and the obtained coating has the characteristics of high crosslinking density, excellent flexibility and low internal stress.

The invention discloses a preparation method of a water-resistant and melting-resistant sodium silicate-based fireproof coating, and belongs to the technical field of preparation of fireproof materials and inorganic-organic hybrid coatings. The method comprises the following steps: (1) reacting isophorone diisocyanate with polypropylene glycol to prepare an isocyanate-terminated polyurethane prepolymer; (2) mixing the polyurethane prepolymer with piperazine pyrophosphate to obtain a component A; (3) mixing a sodium silicate aqueous solution with melamine to obtain a component B; and (4) mixing and curing the component A and the component B in proportion to obtain the coating. According to the invention, an isocyanate group in a polyurethane prepolymer and a sodium silicate aqueous solution are subjected to an in-situ chemical reaction, an organic hydrophobic network is constructed on the surface of an inorganic phase, and the water resistance of the coating is remarkably improved. Meanwhile, piperazine pyrophosphate and melamine form an intumescent flame-retardant system, the intumescent flame-retardant system and sodium silicate are synergistically promoted to form a compact and stable intumescent layer at high temperature, and the problems that a traditional water glass coating easily absorbs moisture and melts and flows at high temperature are effectively solved. The method is simple and controllable in process, and the prepared coating has excellent water resistance, fire resistance and heat insulation performance.

The invention provides a high-temperature-resistant low-dielectric-loss cyanate ester-based composite material and application thereof to a radar-resistant high-power-density antenna housing, and meets the requirement of continuously improving the transmission power of antenna signals on the power-resistant performance of the antenna housing. The high-temperature-resistant low-dielectric-loss cyanate ester-based composite material disclosed by the invention is composed of a prepreg plate, a glue film and a honeycomb, matrix resins of the prepreg plate, the adhesive film and the honeycomb are all modified cyanate ester-based resins; the modified cyanate ester-based resin is prepared by blending and modifying benzoxazine resin, bismaleimide resin, phenolic resin, polyimide resin and cyanate ester resin. The cyanate ester-based composite material with high temperature resistance and low dielectric loss has the advantages of high wave transmission rate, low reflectivity, low thermal conversion efficiency, high heat dissipation efficiency and excellent heat resistance.

The present application provides a kind of quick rebound chemical mechanical polishing pad and its preparation method and application, the polishing layer thickness of the chemical mechanical polishing pad is 0.3-2mm, the compression rate is not higher than 25%, and the quick rebound rate is more than 80%.The polishing layer of the quick rebound chemical mechanical polishing pad uses solution method to synthesize polyurethane resin by the way of adding isocyanate and chain extender in stages, is prepared into coating slurry, is uniformly coated on the support layer with a certain thickness, and is immediately immersed in coagulation bath to be cured and formed.The chemical mechanical polishing pad prepared by the present application has quick rebound capacity, enhances the storage / release process of polishing liquid in the polishing pad during polishing process, and improves the polishing speed.

The invention relates to the technical field of road materials, and discloses a high-viscosity cold-mixed and cold-laid asphalt additive and a preparation method thereof, the additive comprises a basic tackifying system, a crosslinking toughening system and an anti-hydrolysis protection system; the preparation method comprises the following steps: preparing hydrophobic microcapsule coated blocked isocyanate by adopting an interfacial polymerization method, activating a molecular sieve dehumidizer, preparing a chelation protection type catalyst, and finally compounding the components according to a sequence from high temperature to low temperature and from a foundation to a function to obtain the additive. The problem that the performance of a traditional cold-mixed asphalt additive is greatly attenuated in a humid environment is solved, and the cold-mixed asphalt additive is suitable for road maintenance construction in rainy areas and high-humidity environments.

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.

Epoxy resin composition comprisingcomponent (A): an epoxy resin,component (B): at least one curing agent selected from the group consisting of a triazine skeleton-containing phenol-based curing agent, an active ester-based curing agent, and a cyanate ester-based curing agent, andcomponent (C): a compound represented by a predetermined chemical formula, preferably an imidazole compound.

The invention relates to the technical field of high-performance polymer materials, in particular to low-dielectric and high-temperature-resistant modified cyanate ester resin and a preparation method thereof. Advantages and characteristics of bisphenol A type cyanate ester monomers and bisphenol M type cyanate ester monomers are combined, and the dielectric property and the thermal stability are remarkably improved. Diallyl bisphenol A is introduced as a network structure modifier, the phenolic hydroxyl group of the diallyl bisphenol A adjusts the curing reaction rate, and the allyl and bisphenol A structures of the diallyl bisphenol A finely regulate and control the rigid-flexible balance of a cross-linked network through chemical copolymerization, so that the curing process is controllable and the final network structure is optimized. Meanwhile, a toughening system is innovatively designed, epoxy-terminated liquid nitrile rubber is adopted for toughening, stable micron-scale rubber particles are formed in a resin matrix in a chemical bonding mode, and the fracture toughness is improved. The modified resin has excellent dielectric properties, high heat resistance and a wide process window, and meets the strict requirements of a new generation of low observability aircrafts on a bearing-stealth integrated composite material matrix.

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.

Disclosed is a silicone-modified polyimide resin composition comprising a silicone-modified polyimide, a thermal curing agent, wherein the silicone-modified polyimide contains a repeating unit represented by the following general formula (I): in the general formula (I), Ar 1 is a tetravalent organic group having a benzene ring or alicyclic hydrocarbon structure, Ar 2 is a divalent organic group, R is independently selected from a methyl group or a phenyl group, and the thermal curing agent is an epoxy resin, an isocyanate, or a bisoxazoline compound. The silicone-modified polyimide resin composition obtained by the present application has excellent heat resistance, mechanical strength, and light transmittance.

The invention discloses a UV (ultraviolet)-heat dual-curing waterborne polyurethane emulsion and a preparation method thereof. According to the UV-thermal dual-curing waterborne polyurethane emulsion, the heat resistance, the water resistance and the mechanical property of UV-WPUA can be improved, and meanwhile, the storage stability and the yellowing problem of the UV-WPUA can be improved; the polyurethane foam is prepared from the following components in parts by weight: 60-70 parts of binary isocyanate; 35 to 45 parts of polypropylene carbonate; 0 to 12 parts of 1, 4-butanediol; 50 to 55 parts of an acrylate monomer; 0.1 to 0.2 part of p-hydroxyanisole; 0 to 18 parts of sulfydryl silane; 0.1 to 0.3 part of an organic tin catalyst; 5-10 parts of a solvent; 100 to 150 parts of deionized water; belongs to the technical field of coatings.

Embodiments of the disclosure relate to methods of selectively depositing a metal after use of a flowable polymer to protect a substrate surface within a feature. A first metal layer is deposited by physical vapor deposition (PVD). The semiconductor substrate surface is exposed to one or more monomers to form a flowable and flexible polymer film on the first metal layer within the at least one feature. The flowable polymer film forms on the first metal layer on the bottom. The one or more monomers are selected from one or more of amines with bi-functional groups, aldehydes with bi-functional groups, cyanates with bi-functional groups, ketones with bi-functional groups, and alcohols with bi-functional groups. At least a portion of the first metal layer is selectively removed from the top surface and the at least one sidewall. The flowable polymer film is removed.

Provided is a white laminated polyester film that has blocking resistance when water adheres and has excellent adhesion to UV ink. A white laminated polyester film comprising a polyester resin layer and a coating layer on at least one surface of the polyester film substrate, the coating layer being formed by curing a composition containing a urethane resin with a polycarbonate structure and a branched structure, a crosslinking agent, and a polyester resin. The crosslinking agent is preferably a compound containing three or more blocked isocyanate groups.

The invention discloses a multifunctional polyurethane foam adhesive and preparation and application methods thereof, the multifunctional polyurethane foam adhesive comprises a main agent component A and a curing agent component B. The component A comprises, by mass, 35-90 parts of polyether polyol, 1-3 parts of a flexibilizer, 5-15 parts of triptolide powder, 1-5 parts of a foaming agent and 1-3 parts of a surfactant; the component B is prepared from 75 to 100 parts of polyisocyanate, 0.05 to 2 parts of a composite catalyst, 2 to 10 parts of a cross-linking agent, 9 to 20 parts of an organic flame retardant, 8 to 15 parts of an inorganic flame retardant and 1 to 10 parts of graphite powder; wherein the composite catalyst is obtained by compounding A-33 and DBTDL, and integration of multiple functions of flame retardance, insect prevention, rapid curing and the like is realized.

The invention relates to a preparation method of a three-dimensional graded porous carbon material, and belongs to the technical field of porous carbon materials. The preparation method comprises the following steps: mixing polyether polyol (R2305) and polymethylene polyphenyl isocyanate (PM200) according to a ratio, heating in a water bath kettle at a constant temperature to form a polyurethane mixed precursor, adding mixed powder of silicone oil, an activating agent and glucose into the precursor, uniformly mixing by mechanical stirring, then adding a catalyst, continuously uniformly stirring, and carrying out vacuum drying to obtain the polyurethane composite material. And finally, adding a certain amount of water as a foaming agent, stirring and standing to form a hardened blank, and carbonizing, activating, pickling and drying to obtain the three-dimensional graded porous carbon. The porous carbon material with the three-dimensional interconnected graded pore structure is prepared by adopting a carbonization-activation one-step method, the pore size and porosity of macropores can be regulated and controlled, the strength of a green body and a carbonized sample is effectively improved, the specific surface area of porous carbon is remarkably increased, the process is simpler, and the efficiency is higher.

The invention relates to the field of materials, and discloses a low-temperature-resistant fluororubber heat-shrinkable sleeve and a preparation method thereof. The low-temperature-resistant fluororubber heat-shrinkable sleeve is prepared by taking fluororubber, an ethylene-ethyl acrylate copolymer, a nano magnesium hydroxide flame-retardant graft and an attapulgite graft as main raw materials and an antioxidant, a lubricant and the like as auxiliary materials through the processes of mixing, extrusion, irradiation, expansion and the like. Wherein the nano magnesium hydroxide flame-retardant graft is obtained by carrying out surface phosphorus-silicon modification on nano magnesium hydroxide by using triphenyl isocyanate thiophosphate and 2-amino-1-(butyldimethylsiloxy) butane, and has an efficient flame-retardant effect; the attapulgite graft is formed by grafting attapulgite to a polymer, agglomeration is prevented, the low-temperature resistance can be better exerted, and the finally prepared heat-shrinkable sleeve has low-temperature resistance and flame retardance.

The invention provides an electrolyte and a lithium ion battery using the same, the electrolyte comprises an electrolyte additive, and the electrolyte additive comprises a first compound and a second compound; wherein the chemical structural formula of the first compound is shown as a formula (I-a) or a formula (I-b), and the chemical structural formula of the second compound is shown as a formula (II); in the formula (I-a), the formula (I-b) and the formula (II), R1 to R10 are respectively and independently selected from hydrogen atoms, halogen atoms, carbonyl groups, cyano groups, isocyanate, isothiocyanate, unsubstituted or substituted alkyl groups of C1 to C10, unsubstituted or substituted alkoxy groups of C1 to C10, unsubstituted or substituted alkenyl groups of C2 to C10, unsubstituted or substituted alkynyl groups of C2 to C10 and unsubstituted or substituted aryl groups of C6 to C20; and in the formula (II), the number of cyano groups is greater than or equal to 1. By introducing the first compound and the second compound, the normal-temperature and high-temperature cycle performance and low-temperature performance of the battery during high-voltage operation are improved.

The invention discloses an electronic-grade cyanate ester prepolymer as well as a preparation method and application thereof. The preparation method comprises the following steps: in a protective atmosphere, melting a cyanate ester monomer at 140-160 DEG C, adding a catalyst, continuously stirring and reacting for 6-10 hours, cooling to 110-120 DEG C, or cooling to 60-75 DEG C, and adding a low-boiling-point solvent to prepare an electronic-grade cyanate ester prepolymer; wherein the catalyst comprises polyhydroxy alkyl melamine and / or polyhydroxy alkyl cyanuric acid. The cyanate ester prepolymer with excellent performance can be prepared under mild conditions, and the cyanate ester prepolymer has wide application prospects in the fields of electronic packaging substrates, copper-clad plates and aerospace.