126 results about "Polyethyleneglycol dimethacrylate" patented technology

The invention relates to a method for preparing ionic liquid type gel polymer electrolyte through home position polymerization. The method comprises the following steps: taking acrylonitrile and polyethylene glycol dimethyl acrylic acid ester as monomers, taking ethylene carbonate as an organic plasticizer, taking azo diisobutyl cyanogen as an initiator, taking lithium perchlorate as a lithium salt, adding ionic liquid 1-butyl-3-methylimidazole tetrafluoborate as the component of the electrolyte, and adopting a free radical initiation and home polymerization mode to prepare the stable ionic liquid type gel polymer electrolyte. The home polymerization mode has a simple and feasible process, and is capable of directly assembling a lithium cell while simultaneously preparing the electrolyte. The prepared ionic liquid type gel polymer electrolyte has higher room temperature conductivity, good dimensional stability and mechanic properties, and can also be applied to dye sensitization solar cells. The prepared ionic liquid type gel polymer electrolyte cell can avoid the leakage and volatilization of the electrolyte and improve the safety of the cell.

The invention provides a preparation method of a semi-interpenetrating network polymer gel electrolyte membrane. The method comprises the following steps: (A) adding a linear polymer and a solvent to a sample bottle, stirring and dissolving the linear polymer and the solvent, adding polyethylene glycol dimethyl acrylic ester, vinylene carbonate and a photoinitiator, and mixing the polyethylene glycol dimethyl acrylic ester, the vinylene carbonate and the photoinitiator evenly to form a solution; (B) coating a glass plate with the solution, covering a layer of glass plate to form a sandwich structure, and curing the sandwich structure to obtain an ultraviolet-cured semi-interpenetrating network polymer membrane; and (C) immersing the ultraviolet-cured semi-interpenetrating network polymer membrane into liquid electrolyte. According to the gel electrolyte provided by the invention, the balance between the ionic conductivity and the mechanical property is relatively well realized; the ionic conductivity at room temperature can be up to 1.49*10<-3>S cm<-1>; the mechanical property is good; the heat stability is good; the electrolyte can be prevented from leaking; the interface stability is good; and a lithium iron phosphate / metal lithium battery assembled by the gel polymer electrolyte membrane has excellent cycle performance and rate performance.

Nanocomposite biocompatible hydrogels (NCHGs) may be synthesised as model systems for in situ cured local drug delivery devices for treatment of inter alia periodontal infections. The composite includes the following components: nanoparticles (NPs), a matrix gel, and chlorhexidine (CHX) or other antibacterial drug. The NPs were obtained by free radical initiated copolymerization of the monomers, 2-hydroxyethyl methacrylate (HEMA) and polyethyleneglycol dimethacrylate (PEGDMA), in aqueous solution. The same monomers were used to prepare crosslinked matrices by photopolymerization. NCHGs were obtained by mixing NPs, monomers, and drug in an aqueous solution then crosslinked by photopolymerization.

The invention discloses a method for synthesizing hydrogel, one out of N, N-(dimethylamino) ethyl methacrylate or methylacrylic acid polyethylene glycol single methyl ether ester is taken as a monomer, the monomer, an initiator, a cross-linking agent, a catalyst, a complexing agent and a reductant are added according to the molar ratio that monomer: initiator: cross-linking agent: catalyst: complexing agent and reductant is equal to 100-1000: 1: 1-50: 0.05-3: 0.15-9: 1-10, so as to carry out the AGET ATRP reaction and synthesize the hydrogel; wherein the initiator is selected from one out of polyethylene glycol bis (alpha-bromoisobutyrate) ester or 2,6-dibromo dimethyl heptanedioate; the cross-linking agent is one out of ethylene glycol dimethacrylate or poly(ethylene glycol) dimethacrylate; and the catalyst is selected from one out of hexahydrated high ferric chloride or ferric bromide. The method can control the crosslinking degree by regulating the using amount of the cross-linking agent, so that the method can control the mesh size of the hydrogel, control the liquid absorption performance of the hydrogel and obtain the hydrogel with good biocompatibility.

The invention discloses a low-cost environment-friendly photosensitive resin composition. The photosensitive resin composition comprises 100 parts of unsaturated polyester resin, 0-500 parts of acrylic resin, 0-500 parts of aerobic acrylic ester resin, 0-500 parts of polyethylene glycol dimethyl acrylic resin, 5-500 parts of diluent, 0-10 parts of defoamer, 0-10 parts of flatting agent, 0-5 parts of antioxidant and 0.1-10 parts of photoinitiator. The photosensitive resin composition is low in cost and wide in applicability and used for 3D printing technique, effectively solves the problems of 'sticky plate' and low curing speed and the like due to high bonding strength of unsaturated polyester resin and lays the foundation for massive application of the 3D printing technique.

The invention belongs to the technical field of battery diaphragm materials, and discloses a non-woven type power lithium battery diaphragm and a preparation method thereof. The preparation method comprises the following steps: modifying silicon dioxide with a silane coupling agent, forming double bonds on the silicon dioxide, initiating methyl methacrylate (MMA) polymerization, grafting and coating the silicon dioxide with polymethyl methacrylate (PMMA) and forming core-shell particles with good heat stability and good wettability on electrolyte; preparing a suspension liquid from the prepared core-shell particles, adding polyethylene glycol dimethacrylate as a fixing agent, immersing non-woven fabrics into the solution, and taking out and drying the non-woven fabrics to obtain a porous diaphragm; and immersing the diaphragm into a poly(vinylidene fluoride)-hexafluoropropene (PVDF-HFP) solution, volatilizing the solvent and baking the diaphragm at a high temperature of 120-140 DEG C, carrying out thermo-crosslinking on the polyethylene glycol dimethacrylate, and drying the polyethylene glycol dimethacrylate to obtain the non-woven type power lithium battery diaphragm. The diaphragm disclosed by the invention has the advantages of excellent heat stability and electrochemical property and has a good application prospect.

The present invention relates to: an alkyl acrylate-vinyl aromatic compound-vinyl cyanide compound copolymer wherein the alkyl acrylate-vinyl aromatic compound-vinyl cyanide compound copolymer is produced with the use of a polyalkylene-based crosslinking agent of polyethylene glycol diacrylate or polyethylene glycol dimethacrylate in a core portion of the alkyl acrylate-vinyl aromatic compound-vinyl cyanide compound copolymer, and same is made use of in a polycarbonate resin composition so as to exhibit an effect whereby the low temperature impact strength of the resin is improved, and the present invention also relates to a polycarbonate resin composition comprising the copolymer.

The invention relates to polyacrylate-grafted modified gelatin-adhesive and a preparation method thereof. An embedded material which is formed by co-mixing and ultrasonic promoted dissolution of water-soluble polymer containing beta-cyclodextrin and camphorquinone is taken as a photoinitiator; glycerol is taken as a medium to provide more active hydroxyl free radicals; methacrylic acid modified grafted gelatin, acrylate monomer and a cross-linking agent polyethyleneglycol dimethacrylate promote the adhesive to form hydrogel under illumination of blue light with wavelength of 420-480 nm and light intensity of 1200-2000 mw / cm<2>, so that the curing and adhering effect is achieved. The adhesive provided by the invention has the characteristics of being high in photopolymerization efficiency, good in adhesion performance, non-toxic to human body, and the like, can be widely applied to sealing and bleeding-stopping of various acute open wounds, adhering and sealing of operative incisions or holes, and recovering, adhering and fixing of non-open fracture.

The invention discloses a preparation method of pH responsive cation nanogel. The preparation method comprises the following steps: lauryl sodium sulfate and polyethylene glycol dimethyl acrylic ester are sufficiently dissolved in water to prepare a water-phase solution, ethylene glycol dimethacrylate and cationic monomer methylacrylic acid-(N, N-diethyl amine) ethyl ester or 2-(diisopropyl amino) ethyl methacrylate are uniformly mixed to obtain a mixture, and then the mixture is added into the water-phase solution to prepare microemulsion, and a water solution with an initiator is added in the microemulsion to react for 20-24 h to obtain the pH responsive cation nanogel dispersion liquid. The nanogel prepared has good pH responsiveness and dispersion stability, can be placed stably for more than 3 months, and the number-average grain size of the nanogel is smaller than 100 nm.

The invention discloses a polymer isolating membrane, comprising: (a) a porous substrate and (b) a polymer coating arranged on the porous substrate; wherein the polymer in the polymer coating contains mixture of monomer methyl methacrylate, monomer vinyl acetate and low polymer polyethylene glycol diacrylate, or mixture of monomer methyl methacrylate, monomer vinyl acetate and low polymer polyethyleneglycol dimethacrylate or mixture of the two mixtures. The polymer isolating membrane of the invention has desired lithium interface stability, tensile strength and ionic conductivity, the ionic conductivity of gel polymer electrolyte obtained by virtue of the polymer isolating membrane of the invention can reach 3.02x10-3S / cm at room temperature, tensile strength is more than 15MPa, and lithium interface resistance is small and interface stability is good. Besides, the invention also discloses a lithium ion battery applying the polymer isolating membrane of the invention.

A polymer electrolyte is formed by curing a composition prepared by mixing a polymer of compounds of polyethylene glycol di(meth)acrylates and / or multi-functional ethyleneoxides; one selected from a vinylacetate monomer, a (meth)acryalte monomer, and a mixture of a vinylacetate monomer and a (meth)acrylate monomer; and an electrolytic solution containing a lithium salt and an organic solvent.

The invention provides a pre-crosslinked gel granulate for profile control and polymer flooding as well as a preparation method and application of a pre-crosslinked gel granulate. The pre-crosslinked gel granulate belongs to a reagent for oil exploitation, and is obtained by polymerizing and crosslinking a composite monomer and an instable crosslinking agent under initiation of an initiator so as to obtain body gel, drying and grinding, wherein the composite monomer comprises acrylamide and acrylic acid; and the instable crosslinking agent is selected from polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, polypropylene glycol diacrylate, glycol diacrylate, trimethylolpropane triacrylate, ethoxy trihydroxymethyl triacrylate and the like. The volume of the gel granulate is expanded by absorbing water; after the gel granulates are injected into an oil deposit, big pore canals and ultrahigh pervious layers are plugged in the immediate vicinity of wellbore of an oil layer, so that the injected water enters into a low pervious layer area to start residual oil; after acting for certain time, the gel granulate is automatically hydrolyzed into a solution, so that oil-water mobility control is realized; and the gel granulate has double functions of profile control and polymer flooding, is suitable for the oil deposits of a high water holding period, and can be used for improving the recovery rate of petroleum.

The invention discloses a photosensitive resin composition for photocuring a 3D printing elastomer and a preparation method of the photosensitive resin composition. The composition is prepared from the following raw materials in percentage content: 20 to 60 percent of acrylic-terminated flexible polyurethane prepolymer, 20 to 60 percent of polyurethane acrylate resin, 20 to 50 percent of polyethylene glycol dimethacrylate resin, 20 to 50 percent of reactive diluent, 1.0 to 5.0 percent of photoinitiator, 0.1 to 1.0 percent of defoaming agent, 0.1 to 1.0 percent of flatting agent and 0.1 to 1.0 percent of antioxidant. The photosensitive resin composition for the photocuring 3D printing elastomer has high reaction activity and can be used for conventional SLA, DLP and other desktop-level 3D printing equipment, and printed products are good in wear resistance, small in shrinkage rate, not prone to yellowing, good in elasticity and excellent in mechanical property.

A polymeric gel electrolyte and a lithium battery employing the same are disclosed. The polymeric gel electrolyte includes a first ionic conductive polymer having a weight-average molecular weight of greater than or equal to 5,000 and smaller than 100,000, a second ionic conductive polymer having a weight-average molecular weight of 100,000 to 5,000,000, and an electrolytic solution that includes a lithium salt and an organic solvent. The first ionic conductive polymer preferably is at least one polymer selected from polyethyleneglycol dimethylether, polyethyleneglycol diethylether, polyethyleneglycol dimethacrylate, polyethyleneglycol diacrylate, polypropyleneglycol dimethacrylate, polypropyleneglycol diacrylate, and mixtures and combinations thereof, and the second ionic conductive polymer preferably is at least one polymer selected from polyvinylidenefluoride, polyvinylidenefluoride-hexafluoropropylene copolymer, polyurethane, polyethylene oxide, polyacrylonitrile, polymethylmethacrylate, polyacrylamide, polyacetate, and mixtures and combinations thereof.

The invention relates to a preparation method for a cinnamaldehyde surface molecularly imprinted polymer. Cinnamic acid and a cinnamic acid polymer with specific recognition characteristic are prepared by adopting a molecular imprinting technology. The molecularly imprinted polymer takes alkylated silica as a carrier, analogue cinnamic acid of cinnamaldehyde as a template, 4-vinylpyridine as a functional monomer and polyethylene glycol dimethacrylate as a cross-linking agent. The obtained molecular imprinting polymer is synthesized into trichloromethane by adopting a thermal polymerization method. The obtained molecular imprinting polymer is used as filler of a solid phase extraction column for self preparing a solid-phase extraction column with the specificity. Meanwhile, the solid-phase extraction column and liquid chromatography are combined and applied to detection of cinnamaldehyde and analogue in an actual cosmetic sample. According to the preparation method disclosed by the invention, high-efficiency separation, enrichment and purification of essence cinnamaldehyde in the cosmetics are realized; the defects of a traditional solid-phase extraction column are overcome; and the obtained solid-phase extraction column can be repeatedly used and is low in cost and favorable in application prospect.

The invention relates to the technical field of solid-phase extraction-gas chromatography-mass spectrum coupling, and provides a test method for detection of tea polyphenol and flavonoid constituents of golden camellia. The test method comprises solid-phase extraction adsorption-gas chromatography-mass spectrum coupling detection, wherein the solid-phase extraction is carried out by a stirring rod in a direct stirring manner; the stirring rod is coated with a graphene-polymer coating on the basis of two-dimension or three-dimension; the materials of thegraphene-polymer coating comprise graphene and a graphene modified material; thegraphene modified material comprises graphene oxide, graphene-polyethylene glycol dimethyl acrylic ester, graphene-polypyrrole, graphene-polymethyl trimethoxy silane and a graphene nanomaterial. The test method for detection of tea polyphenol and flavonoid constituents of golden camellia has the characteristics of correct detection, high sensitivity, good preferential adsorption effect and long service life.

The invention discloses an organic-inorganic super-hydrophilic and underwater super-lipophobic fabric and a preparation method and application thereof. The preparation method comprises the steps of firstly adding tetraethylortho silicate, apolythiol functional monomer and polyethylene glycol dimethyl acrylate to ethanol to prepare a solution, immersing the fabric into the solution for 1-5min and then taking out the fabric; putting the obtained fabric into a closed container containing ammonia water and a n-butylamine solution, keeping the fabric out of touch with the ammonia water and n-butylamine; and putting the closed container into a drying oven and reacting at 30-60 DEG C for 0.5-3h to prepare the organic-inorganic super-hydrophilic and underwater super-lipophobic fabric. The water contact angle of the prepared fabric can reach 0 degree within 0.36s, the underwater oil contact angle can reach 160 degrees, the fabric can be applied to oil-water separation, the separation efficiency reaches 99.5%, and the fabric has good reusability.

The invention relates to hydrogels containing water and polyethylene glycol-dimethacrylates in a polymerized form. The polymethacrylate blocks are so short that they form no proper phase. The invention further relates to methods for producing said hydrogels. The inventive hydrogels are provided with reduced haze and are used as materials for contact lenses, electrophoresis gels, membrane materials, and sound-absorbing materials.

The invention relates to an anti-fog / anti-frost coating based on a cationic polyelectrolyte copolymer, and a preparation method of the anti-fog / anti-frost coating. The anti-fog / anti-frost coating is prepared from 3-50% of poly(dimethylaminoethyl methacrylate-co-fluoroalkyl methacrylate)-b-cationic polyelectrolyte, 0.3-20% of oligo-ethylene glycol dimethacrylate, 0.05-0.5% of photoinitiator and thebalance of solvent. 2-(dimethylamino)ethyl methacrylate, fluoroalkyl methacrylate and methacryloyloxyethyl trimethyl ammonium chloride are used as raw materials; a block polymer is synthesized by using a reversible addition-fragmentation chain transfer polymerization method; polymers of different countra-ions are obtained by means of ion exchange and are taken as main components of the coating; the oligo-ethylene glycol dimethacrylate is used as a crosslinking agent, and a film is formed by cross-linking and solidifying the oligo-ethylene glycol dimethacrylate and a substrate by means of ultraviolet (UV) light. The prepared coating realizes a hydrophilic-hydrophobic balance, has good stability under the premise of guaranteeing excellent anti-fog / anti-frost performance, and realizes anti-fog / anti-frost long-term effect.

The invention discloses a photosensitive resin composition for a photocuring 3D printing high-toughness product and a preparation method of the photosensitive resin composition. The preparation method comprises the following steps: dissolving 5-30% of MBS resin in ethyl acetate / vinyl acetate to prepare an MBS solution, then mixing and adding 20-60% of an acrylic-terminated flexible polyurethane prepolymer, 20-60% of acrylate resin, 5-30% of polyethylene glycol dimethacrylate resin and 20-50% of a reactive diluent, conducting mixing and heating to 30-110 DEG C, conducting stirring and mixing for 0.5-12 hours, removing a solvent in vacuum, and finally, adding 0.1-1.0% of a defoaming agent, 0.1-1.0% of a flatting agent, 0.1-1.0% of an antioxidant and 0.1-5.0% of a photoinitiator, and uniformly conducting stirring and mixing to obtain the photosensitive resin composition for the photocuring 3D printing high-toughness product. The high-toughness photosensitive resin composition for photocuring 3D printing prepared by the invention has the characteristic of high toughness, and also has the characteristics of low viscosity, low shrinkage, high curing speed and the like which accord with a photocuring 3D printing forming process.

The invention provides a polymer electrolyte with a comb-shaped structure. The polymer electrolyte is prepared from a polymer monomer, a lithium salt and a solvent through drying and ultraviolet curing, wherein the polymer monomer comprises polyethylene glycol dimethacrylate with active functional groups on the single side and / or polyethylene glycol dimethacrylate with active functional groups onboth sides; and the lithium oxygen ratio EO / Li+ of the polymer monomer to the lithium salt is 5-30. By designing the polymer intrinsic structure, the molecular chain with the comb-shaped molecular structure is formed; by increasing the free moving volume of the molecular chain at normal temperature, the crystallization degree of the polymer is inhibited, the movement capability of the chain segment of the polymer is improved, and the concentration of the carrier is improved, so that the conductivity of the polymer electrolyte is improved, and stability to metal lithium is achieved. Experimental results show that the ionic conductivity in the polymer electrolyte is 2.5-9.09*10-4S cm-1, and the electrochemical window is 0-5V. The invention further provides an all-solid-state lithium battery.

The invention relates to an ophthalmic implanted material with the shape memory function and a preparation method thereof, belonging to the field of biomedical materials. Thermally polymerizable acrylate monomers are used as the basic material, and the mol ratio thereof is 10.0-98.0%; polyethylene glycol diacrylates or polyethylene glycol dimethyl acrylates, which have different molecular weights, are used as the cross-linking agent, and the mol ratio thereof is 2.0-90.0%; and thermal initiator accounts for 0.2-1.0% of the total mass. The thermally polymerizable monomers, the thermal initiator and the cross-linking agent are uniformly mixed under the protection of nitrogen gas, then the mixture is injected into a mold to be subject to the thermal polymerization reaction at the temperature of 70-90 DEG C for 24-48 hours, and the Soxhlet extraction is adopted to remove the unreacted monomers and oligomers to obtain the ophthalmic implanted material with the shape memory function. The invention has the advantages that the prepared material has the shape memory property, the memory property transition temperature of the material can be adjusted to the body temperature, and the material has large deformation extent and higher light transmittance in visible light areas.

The invention provides a polyion liquid electrolyte for in-situ photopolymerization without a solvent. The polyion liquid electrolyte is characterized in that polymerizable functionalized ionic liquidand polyethylene glycol dimethacrylate (PEGDMA) are subjected to one-step cross-linking polymerization under UV illumination to form a novel functionalized cross-linked polyionic liquid electrolyte.The electrolyte is carried out under a solvent-free condition; the operation is simple, the possibility of environmental pollution is little, the high ionic conductivity is showed, compared with a traditional polymer electrolyte, the synthesis process flow is shortened, the cost is reduced, the ionic conductivity at room temperature is improved, a new idea is provided for the development of polymer electrolytes, and the polyion liquid electrolyte has a good application prospect.

A method for shape representation of hydrogel micro-pore arrays comprises the steps that firstly, a selected hydrogel material is polyethylene glycol dimethacrylate and an optical masking method and a template method are adopted for preparing the polyethylene glycol dimethacrylate hydrogel micro-pore arrays with different pore diameters and different pore depths; secondly, a scanning electrochemical microscope probe is prepared and a scanning electrochemical microscope detection system is established; finally, home position representation is conducted on the shape of the polyethylene glycol dimethacrylate hydrogel micro-pore arrays in an aqueous solution through a scanning electrochemical microscope. According to the method, natural oxygen couples in the aqueous solution serve as redox couples, home position representation is conducted on the shape of the polyethylene glycol dimethacrylate hydrogel micro-pore arrays in the aqueous solution through the scanning electrochemical microscope technology, two-dimensional pore diameter and three-dimensional shape information of the surfaces of the hydrogel micro-pore arrays is obtained, and the method has the advantages that home position representation, reversible representation and lossless representation can be conducted on a sample in the aqueous solution and the three-dimensional shape information of the hydrogel material can be obtained.

The invention discloses snowman-shaped Janus particles and a preparation method thereof, belongs to the technical field of Janus particles, and solves the problems of non-strict chemical partition andpoor strength and toughness of a Janus material in the prior art. The snowman-shaped Janus particles are organic / inorganic composite snowman-shaped Janus particles, the hydrophilic ends of the organic / inorganic composite snowman-shaped Janus particles are silicon dioxide, and the hydrophobic ends of the organic / inorganic composite snowman-shaped Janus particles are ethylene glycol dimethacrylate / polybutyl acrylate. The preparation method of the snowman-shaped Janus particles comprises the following steps of: preparing a polybutyl acrylate / polyethylene glycol dimethacrylate seed emulsion; slowly dropwise adding a silane coupling agent monomer emulsion into the polybutyl acrylate / polyethylene glycol dimethacrylate seed emulsion, and carrying out a constant-temperature reaction for 18-24 h;centrifuging to obtain a product, centrifugally washing the product, and freeze-drying the product to obtain the organic / inorganic composite snowman-shaped Janus particles. The snowman-shaped Janus particles are uniform in particle size, high in strength and toughness and good in oil resistance and chemical resistance.

A polymer electrolyte composition for improving overcharge safety and a lithium battery using the same are provided. The polymer electrolyte composition includes acrylate, epoxy or isocyanate at both of its terminals, and includes a compound containing an aromatic group such as thiophene, biphenyl or furan in an amount of 0.1% to 20% by weight based on the amount of the overall organic electrolytic solution. The polymer electrolyte composition further includes at least one of polyethylene glycol diacrylate (PEGDA), polyethylene glycol dimethacrylate (PEGDMA), and a mixture thereof. A lithium polymer battery using the polymer electrolyte composition can be suppressed from danger of ignition or explosion when the battery is overcharged due to some uncontrolled conditions, such as failure of a charger. Moreover, an additional cutoff device is not necessary, while still exhibiting good life cycle characteristics of the battery.

The invention discloses a novel wound dressing used by hospital patients. The novel wound dressing includes an adhesive tape layer, an adhesive layer, a cotton yarn layer and a protective layer. The adhesive layer is located on the upper surface of the adhesive tape layer, and the protective layer is located on the upper surface of the cotton yarn layer. A bamboo fiber layer and a moisture absorption layer are arranged between the adhesive layer and the cotton yarn layer, the bamboo fiber layer is located on the upper surface of the adhesive layer, the moisture absorption layer is located on the upper surface of the bamboo fiber layer, and the moisture absorption layer is located on the lower surface of the cotton yarn layer. The surface of the adhesive layer is covered with 4-vinylbenzoicacid esterified gelatin and methacrylate esterified dextran, and the surface of the moisture absorption layer is covered with methacrylated amylopectin, polyethylene glycol dimethacrylate and acrylamide.

The invention discloses a purification method of 4N-purity nitric oxide gas, and the purification method comprises steps of mixing reaction of dilute sulfuric acid and sodium nitrite, absorption through alkali liquor, gas-liquid separation, drying and separation, and the purification method is characterized in that dried gas forwardly flows through a polyethyleneglycol dimethacrylate adsorption area under the condition with temperature of minus 20DEG to 30DEG C and pressure of 0.5MPa to 1.0MPa; and the adsorbed gas is collected. The polyethyleneglycol dimethacrylate is used as an adsorption agent, so that the disproportionation and oxidization of the nitric oxide can be effectively inhibited, content of impurities such as nitric dioxide and nitrous oxide can be reduced, the purity of the nitric oxide gas is improved, the purity of the purified nitric oxide gas is more than 99.99 percent, the content of the nitric dioxide is smaller than 20ppm, and the content of nitrous oxide is less than 20ppm.

The invention discloses a metal antirust agent containing modified thiadiazole. The raw materials of the metal antirust agent includes styrene-acrylic emulsion, polyethylene glycol dimethacrylate, polyaniline, polymaleic anhydride, amino acid, benzotriazole, benzimidazole, modified thiadiazole, ricinoleic acid, tololeic acid diethanolamide, sodium molybdate, zirconic acid zinc, propargyl alcohol,cerium nitrate, graphene oxide, triethanolamine, silane coupling agent, potassium hydroxide, natural corrosion inhibitor, ethanol and water. The metal antirust agent containing the modified thiadiazole has good antirust effect and long antirust time.

The invention relates to a pasty anaerobic pipe thread sealant with good property of preventing the liquid separation in storage and a preparation method thereof. The sealant includes moderate polyethylene glycol dimethacrylate oligomer, amine type accelerator, saccharin, metal-chelator, stabilizer, plasticizer, heatproof reinforcing agent, lubricating stuffing, pigment, hydrophilic white carbon black, cationic surfactant and ethanol. The preparation method includes mixing and stirring the materials in a certain ratio and adding sequence by a technology. The anaerobic pipe thread sealant has stable property and has no separated liquid storing for 1 year at room temperature, and has no separated liquid storing for 14 days at 50 DEG C.