610 results about "Adipic acid" patented technology

The invention belongs to the field of chemical engineering manufacturing industry, and relates to equipment and a method for producing cyclic ketone compounds by oxidizing cycloolefin by using waste gas produced by adipic acid. Raw material gas A containing nitrous oxide from an adipic acid production process production line can be subjected to oxygen removal, so that the oxygen content is less than 100ppm; the raw material gas A containing nitrous oxide from the adipic acid production line can also be purified into purer gas containing 50-99% of N2O, and the purer gas is used for reacting with the cycloolefin compound; the reaction equation is CnH2n-2 (cycloolefin) + N2O (nitrous oxide)-> CnH2n-2O (a product cyclic ketone compound) + a byproduct + N2 superscript (nitrogen), wherein n is a positive integer from 4 to 24. The device is stable in consumption quota, low in production cost and high in economic benefit compared with the prior art.

The invention discloses a silane-crosslinked low-smoke halogen-free flame-retardant oil-resistant polyolefin cable material and a preparation method thereof. The method comprises the following steps: preparing a bio-based polyesteramide toughening phase which is pre-polymerized by castor oil-based polyamide and poly (butylene adipate-co-terephthalate) and is terminated by itaconic anhydride; the preparation method comprises the following steps: self-assembling phytic acid and melamine to wrap ammonium polyphosphate, so as to prepare supramolecular flame-retardant gel powder; the method comprises the following steps: grafting aramid pulp fibers by using a phosphorus-containing silane coupling agent to prepare a reactive liquid crystal reinforced phase; the preparation method comprises the following steps: blending and banburying the components with a hydrogenated styrene-isoprene-styrene block copolymer, an antioxidant and a peroxide cross-linking agent, carrying out dynamic vulcanization and interface bonding, and carrying out extrusion and electron beam irradiation to finally crosslink. An interpenetrating-topology network structure is formed in the prepared cable material, the crosslinking degree is larger than or equal to 82%, and the cable material is rapid in crosslinking, excellent in oil resistance, low in smoke and free of toxicity and is particularly suitable for super high-rise building hanging cables, deep sea exploration cables and new energy automobile liquid cooling cables.

The invention relates to the technical field of sewage treatment, in particular to a preparation method of a degradable bactericide for an oil field. According to the invention, a hydroxypropyl guanidine gum-polycaprolactone-ethylenediamine fragment copolymer is taken as a carrier, a methylisothiazolinone quaternary ammonium salt (Q-MIT) bactericide is loaded, and the degradable bactericide for the oil field is obtained by cooperating with a dodecyl ethyl sulfide (TC-SE) bactericide and combining with sodium polyaspartate. A carrier forms a hydrogen bond with a polar group on the surface of a biological membrane through a hydroxypropyl guanidine gum main chain to realize targeted anchoring, a polycaprolactone branched chain encapsulates Q-MIT through a hydrophobic effect, primary amino groups of ethylenediamine are introduced to form a pH sensitive Schiff base bond with Q-MIT, and the primary amino groups and adipic dihydrazide form a thermal response hydrazide bond to construct a dual dynamic covalent bond, so that controlled release of Q-MIT is realized, and the biomembrane is prepared. And moreover, the components of the whole system are connected through degradable chemical bonds, so that the environmental protection property and sustainability of oil field operation are guaranteed.

The application belongs to the technical field of plastics, and particularly relates to a degradable antibacterial plastic packaging bag and a preparation method thereof. The degradable antibacterial plastic packaging bag comprises the following raw materials in parts by weight: polycaprolactone 70-90 parts; polybutylene adipate terephthalate 20-40 parts; Cr and Cu co-modified ZIF-8 5-20 parts; and cerium oxide tannic acid material 2-6 parts. The Cr and Cu co-modified ZIF-8 synergistically improves the antibacterial performance of the packaging bag, and the addition of the cerium oxide tannic acid material further improves the antibacterial performance of the packaging bag. Moreover, the degradable antibacterial plastic packaging bag prepared by the application has excellent mechanical properties.

The invention discloses a jacquard vamp material based on bio-based degradable polylactic acid (PLA) and a preparation method thereof, and relates to the technical field of shoe materials. The jacquard vamp material is of a three-layer jacquard structure formed by integrally weaving PLA composite filaments through a jacquard warp knitting machine. The PLA composite filament is prepared from the following raw materials in parts by weight: 80-95 parts of polylactic acid (PLA) slices, 5-15 parts of poly (butylene adipate / terephthalate) (PBAT), 3-8 parts of a flexibilizer, 1-3 parts of a compatilizer, 0.5-2 parts of an anti-hydrolysis agent and 0.5-1.5 parts of a lubricant. According to the invention, the bio-based PLA is used as a main raw material and is matched with degradable auxiliaries such as PBAT, so that the whole vamp material can be completely biodegraded under a composting condition, the problem of environmental pollution of a traditional vamp is fundamentally solved, and meanwhile, through blending modification of PBAT and the flexibilizer, the flexibility and impact resistance of the PLA material are remarkably improved, and the vamp material has good application prospects. The requirements of the vamp material on softness, wear resistance and durability can be met.

The invention relates to the technical field of biodegradable high polymer materials, in particular to a tear-resistant high-barrier biodegradable mulching film and a preparation method thereof, and the tear-resistant high-barrier biodegradable mulching film is prepared from the following raw materials in parts by weight: 60-90 parts of poly (butylene adipate-co-terephthalate); 10 to 40 parts of poly (propylene carbonate); 0.5-5 parts of a plasticizer; 0.05 to 0.3 part of a cross-linking agent; 0.1 to 10 parts of talcum powder; 0.1 to 2 parts of a lubricant; 0.1-1 part of an anti-blocking agent; 0.1 to 1 part of an antioxidant; 0.1 to 1 part of an anti-ultraviolet agent; 0.1-1 part of a light stabilizer; 0.1 to 1 part of an anti-hydrolysis agent; 0.1-1 part of a nucleating agent; the plasticizer is poly (1, 2-propylene glycol adipate); and the cross-linking agent is 1, 4-bis (tert-butylperoxy) diisopropyl benzene. The film has good mechanical properties and water vapor transmission amount, can be completely biodegraded, and has good aging resistance.

The invention provides a composite packaging film and a preparation method thereof, and belongs to the technical field of packaging films. The composite packaging film comprises the following raw materials: poly (butylene adipate-terephthalate), polylactic acid, a maleic anhydride grafted PS copolymer and a chain extender, wherein the addition amount of the maleic anhydride grafted PS copolymer accounts for 1-5% of the total mass of the poly (butylene adipate-terephthalate) and polylactic acid. According to the invention, inorganic filler does not need to be added, and the chain extender ADR4370S and the compatilizer PS-MA are added to form a synergistic regulation mechanism in a melt blending process: the chain extender acts on a molecular chain layer to improve the length of the molecular chain and the rheological behavior of a melt; the compatilizer PS-MA acts on a phase interface layer surface to enhance interface bonding between PLA and PBAT phases, so that the molecular structure and the interface structure of a blending system are optimized at the same time, and the mechanical property, the processing stability and the structural uniformity of the film are improved.

The invention discloses a method for recycling PA66 / PET (Polyamide 66 / Polyethylene Terephthalate) mixed waste. The recycling and regenerating method comprises the following steps: under the action of a catalyst, carrying out hydrolysis reaction on the PA66 / PET mixed waste; wherein the catalyst is adipic acid, and the use amount of the catalyst is 10-30 wt% of the amount of the mixed waste according to the mass percentage. An adipic acid autocatalysis system is adopted, efficient hydrolysis of PA66 and PET is achieved at the same time under the single reaction condition, the defect that step-by-step treatment is needed in a traditional process is overcome, the hydrolysis rate of PET is larger than or equal to 85%, the hydrolysis rate of PA66 is 50-70%, hydrolysis products can be further polymerized into polyesteramide with excellent mechanical performance and thermal stability, and the preparation method is suitable for industrial production. And the spanning from degradation recovery to upgrading regeneration is realized.

An absorbent retail paper product made up of cellulose fibers, and having a 1,3-dichloro-2-propanol concentration of non-detected amounts to 50 ppb as measured using the AOAC Official Method 2000.0150, a 3-monochloro-1,2 propanediol concentration of non-detected amounts to 1000 ppb as measured using the AOAC Official Method 2000.0150, a polyaminoamide-epihalohydrin concentration of non-detected amounts to 0.09% as measured by an “Adipate test”, and a cross direction wet strength of 80 to 200 n / m, wherein all of the cellulose fibers contained in the absorbent paper product are non-synthetic, cellulose fibers and the absorbent paper product is substantially free of formaldehyde.

The salt, such as adipate salt Form A, and freebase forms of Compound A are WEE1 inhibitors. Such salts and / or forms and freebase forms, as well as pharmaceutically acceptable salts and compositions thereof, are useful for treating diseases or conditions, including conditions characterized by excessive cellular proliferation, such as breast cancer.

The invention provides a composition for changing plasticity of bone meal particles as well as a preparation method and application of the composition, and relates to the technical field of biomedical materials. The composition is prepared from the following raw material components: bioactive glass, dihydrazide modified sodium hyaluronate, sodium hyaluronate with the molecular weight of 50kDa to 500kDa, a polylactic acid-glycolic acid copolymer and carboxymethyl cellulose. The preparation method of the dihydrazide modified sodium hyaluronate comprises the following steps: carrying out carboxyl activation on sodium hyaluronate, carrying out a cross-linking reaction on the activated hyaluronic acid and adipic dihydrazide, and then terminating the reaction. The composition provided by the invention not only can provide support, but also can adjust the degradation rate to be matched with the bone regeneration period, and all the components synergistically improve the mechanical property and the viscoelastic property. The composition disclosed by the invention can be formed in situ at a bone defect part, provides a space for growth and proliferation of bone cells, improves the biological activity and osteoinductivity of an artificial bone, and promotes bone growth and repair.

The present application relates to the technical field of surface treatment, in particular to a kind of biobased degradable cable material and preparation method thereof.Biobased degradable cable material includes 55-65 parts of poly-L-lactic acid and poly-3-hydroxybutyric acid-3-hydroxyhexanoate mixed matrix resin, 4-6 parts of dianhydride modified castor oil polyol, 10-15 parts of polyaminoval, 5-8 parts of nano enhanced filler, 6-10 parts of biobased plasticizer, 0.5-1.0 parts of antioxidant, 8-12 parts of environmentally friendly flame retardant.Dynamic ester bond crosslinking agent dianhydride modified castor oil polyol reaction forms dynamic ester bond crosslinking network, ester bond breakage occurs at high temperature beyond normal working range to release stress, temperature returns to normal and can recombine again;Semi-interpenetrating network enhanced phase polyaminoval forms interpenetrating structure with matrix resin in molecular chain interlacing mode, constructs stable heat-resistant skeleton, effectively inhibits high-temperature deformation, and its biobased structure ensures the overall degradability of the material, realizes the balance of heat resistance and degradability.

The invention relates to the technical field of high polymer materials, and particularly discloses modified polyamide, an acid dyeable nylon 66 fiber as well as a preparation method and application of the acid dyeable nylon 66 fiber. The acid dyeable nylon 66 fiber disclosed by the invention has in-situ leveling property, modified monomers, adipic acid and hexamethylenediamine are polymerized to obtain modified polyamide, then the modified polyamide is prepared into pre-oriented yarns, and the pre-oriented yarns are elasticized to obtain the acid dyeable nylon 66 fiber. The ionic group of the modified monomer has an in-situ retarding effect in the nylon 66 fiber and is not combined with a dyeing seat, and an excellent level dyeing effect and a high dye uptake can be obtained without using a leveling agent. The addition amount of the modified monomer is small, the molecular size of the modified monomer is similar to that of adipic acid and hexamethylenediamine monomers, adverse effects on a polymerization process and a nylon 66 molecular structure are small, and the prepared acid dyeable nylon 66 fiber has excellent mechanical properties. The preparation cost of the acid dyeable nylon 66 fiber is low, the process is simple and convenient, and the acid dyeable nylon 66 fiber has a wide application prospect.

The invention relates to the field of textile fabrics, and discloses a polylactic acid fabric and a preparation method thereof. The polylactic acid fabric is prepared by weaving polylactic acid fibers, the polylactic acid fibers are prepared by melt spinning of a polylactic acid material body, and the polylactic acid material body is prepared from the following raw materials in parts by weight: 100-120 parts of polylactic acid resin, 12-20 parts of a heat-resistant moisture absorbent, 6-10 parts of a toughening agent and 0.2-0.4 part of an antioxidant; the heat-resistant moisture absorbent is prepared from lignin fibers, poly (ethylene 2, 5-furandicarboxylate), poly (butylene adipate-co-terephthalate) and a dispersing agent. The preparation method comprises the following steps of melt spinning, rib knitting, heat setting, dyeing and aftertreatment. The polylactic acid fabric prepared by the invention has better heat resistance, moisture absorption and shrink deformation resistance, and is suitable for scenes with higher requirements on heat resistance and moisture absorption, such as underwear or infant clothes.

The invention provides an environment-friendly low-chlorine wet strength agent and a preparation method and application thereof.The preparation method comprises the steps that adipic acid and tetraethylenepentamine are mixed and react for 2-6 h at the temperature of 170-190 DEG C, and a prepolymer is obtained; cooling the prepolymer to 120-140 DEG C, adding a modifier, carrying out a heat preservation reaction for 2-3 h, and adding deionized water to adjust the solid content to 55-65% so as to obtain a modified polyamide solution; adding a cationizing agent and epoxy chloropropane into the modified polyamide solution, heating to 65-75 DEG C, reacting, and adding acid to adjust the pH value to 2.5-4.5 when the viscosity of the system reaches 50-80 mPa.s; adding sodium hydrogen sulfite, and carrying out heat preservation reaction for 1-2 hours; and adding deionized water to adjust the solid content to 12-13%, thereby obtaining the environment-friendly low-chlorine wet strength agent. The specific modifier is adopted to modify a polyamide main chain, and the cationizing agent is introduced, so that the prepared wet strength agent not only can remarkably reduce the content of organic chlorine in a product, but also can improve the dry and wet strength, water resistance and folding resistance of paper. In addition, the product can also shorten the curing time of the paper.

The invention relates to the technical field of polyester degradable plastics, and particularly discloses an automotive trim composite material with antistatic and sound-absorbing functions and a preparation method thereof. The composite material comprises a composite material body and a sound absorbing material compounded on the surface of the composite material body, comprising the following components in parts by weight: 50-70 parts of a compound resin matrix of polylactic acid and poly (adipic acid-butylene terephthalate), 20-35 parts of multifunctional reinforced fibers, 5-10 parts of a structural conductive antistatic agent and 0.05-0.21 part of a microbial degradation triggering agent. The preparation method comprises the steps of fiber pretreatment and modification, conductive master batch preparation, raw material drying, mixing molding, sound-absorbing material compounding and the like. According to the invention, synergism of long-acting antistatic property, high sound absorption, controllable degradation and excellent mechanical property is realized, migration of an antistatic agent is avoided, the sound absorption coefficient is high, degradation is controllable, the process is simple, industrialization is feasible, and the composite material is suitable for automotive interior parts.

SOLVENT COMPOSITIONS The present invention relates to a solvent composition for solvent-based paints or other coatings characterized in that it comprises a combination of dimethyl glutarate and at least one other compound selected from isobutyl acetate, ethyl lactate, dimethyl 2-methylglutarate, 2-methyltetrahydrofuran, ethyl acetate, cyclopentyl methyl ether, dithoxymethane, dimethyl carbonate, dimethyl succinate, benzyl alcohol, dimethyl adipate, and glyceryl triacetate. Fig. 1

The application provides a single-component polyurethane primer, and raw materials for preparing the single-component polyurethane primer include: alcohol materials, the alcohol materials including polyester polyols, the polyester polyols including at least one of polyethylene glycol butanediol adipate polyol, polyethylene glycol diethylene glycol adipate polyol and poly-3-methyl-1,5-pentanediol adipate polyol; isocyanate materials, the isocyanate materials including diisocyanate and polyisocyanate, the diisocyanate and / or the polyisocyanate including an aromatic ring in a molecular structure, and the diisocyanate:polyisocyanate = 6-12:1-5 in terms of mass ratio; additives, the additives including a catalyst; a solvent; and the alcohol materials:isocyanate materials = 1-2:0.7-1.7 in terms of mass ratio. The single-component polyurethane primer can form a primer layer with large surface tension, solvent resistance and corrosion resistance to solvents in a glue layer, and can improve the surface tension of a substrate.

This invention provides a high-performance implantable biomedical product based on polylactic acid (PLA) and its preparation method. The preparation method, by weight, involves first melt-blending 10-20 parts of polybutylene adipate succinate (PSA) with 1-2 parts of hydroxyapatite to obtain a PBSA / HA mixture; then mixing 78-89 parts of PLA with PBSA / HA and extruding the mixture via a twin-screw extruder to obtain PLA / PBSA / HA granules; finally, using a micro-injection molding process to prepare the high-performance implantable biomedical product. This method induces a strong shear field through micro-injection molding, enabling in-situ fiber formation of the PBSA dispersed phase within the PLA matrix. Simultaneously, the addition of a specific amount of hydroxyapatite significantly enhances the product's toughness, resulting in a product with excellent biocompatibility and osteoinductive activity.

The present invention relates to a polybutylene adipate terephthalate resin having a controlled biodegradation rate and excellent coatability and an article comprising same.

This application relates to the field of materials, and provides a method for preparing all-starch foamed tableware. By weight, the all-starch foamed tableware comprises the following components: 85-92 parts of composite modified starch, 23-38 parts of plant cellulose, 1-2 parts of foaming agent, 3.5-7 parts of nucleating agent, 1-1.5 parts of plasticizer, and 3-6 parts of crosslinking agent; wherein the foaming agent includes at least one of sodium bicarbonate, ammonium bicarbonate, and ammonium carbonate; the nucleating agent includes at least one of talc, calcium carbonate, montmorillonite, diatomaceous earth, straw powder, chitosan, and cyclodextrin; the plasticizer includes at least one of glycerol, sorbitol, ethanol, and water; and the crosslinking agent includes at least one of citric acid, malic acid, tartaric acid, maleic acid, succinic acid, and adipic acid. This application not only comprehensively improves the water resistance, heat resistance, mechanical strength, and cell uniformity of the all-starch foamed tableware, but also ensures that the product meets usage requirements.

The invention provides yellow glue resistant to corrosion of a plasticizer and a preparation method of the yellow glue. The yellow glue is prepared from a polyurethane prepolymer, a chloroprene rubber sheet, methyl methacrylate, benzoyl peroxide, an anti-aging agent, butanone, cyclohexane, dimethyl carbonate and tackifying resin. The polyurethane prepolymer is prepared from the following components in parts by weight: 10 to 14 parts of 1, 4-butanediol adipic acid polyester polyol, 4 to 8 parts of polycaprolactone polyol, 1 to 3 parts of diphenylmethane diisocyanate, 0.05 to 0.15 part of 1, 6-hexanediol, 1 to 2 parts of hydroxyethyl methacrylate, 0.01 to 0.03 part of organic bismuth catalyst and 75 to 80 parts of butanone. The polyurethane prepolymer with specific crystallization performance is synthesized through cooperation of polycaprolactone polyol and polyester polyol, and the yellow glue is endowed with excellent plasticizer corrosion resistance and low-temperature activation capacity. Active groups in the polyurethane prepolymer are subjected to graft copolymerization with the chloroprene rubber adhesive and MMA, and a plasticizer-resistant polyurethane chain segment is introduced into a molecular chain of the chloroprene rubber adhesive, so that a hard segment-soft segment alternating block structure is formed, and corrosion resistance and viscoelasticity are both considered.

The invention discloses an elastic amorphous PCTG material and a preparation method thereof, and the elastic amorphous PCTG material comprises the following raw material components: terephthalic acid, ethylene glycol, 1, 4-cyclohexanedimethanol, iso-acid and iso-alcohol. Wherein the iso-acid comprises adipic acid, and the iso-alcohol comprises 1, 4-butanediol, polyethylene glycol and methoxy polyethylene glycol. The PTA, EG and CHDM are used as a basic reaction system of the PCTG material, the TG and TM temperatures of the material are increased by adding the CHDM and controlling the dosage of the CHDM, and then the high-temperature resistance of the material is improved. And meanwhile, by introducing iso-acid and iso-alcohol which are different from those of a basic reaction system, the regularity of molecules is changed, so that the elasticity of the material is improved. The TG temperature is 90-105 DEG C, the melting peak value is 180-230 DEG C, the tensile strength is larger than or equal to 50 MPA, the elastic modulus is 1200-1500 MPa, and the elongation at break is larger than or equal to 600 parts.

This invention relates to the field of organic synthesis technology and discloses a method and system for preparing adiponitrile. The method includes: S1: atomizing molten adipic acid and mixing it with ammonia gas, followed by an ammoniation reaction to generate an ammoniation product; S2: dividing the ammoniation product into two parts, a and b. Part a undergoes a countercurrent, non-contact heat exchange with hot material to generate crude adiponitrile through heating and dehydration, while part b is recycled back to step S1 to participate in the reaction. The ratio of the ammoniation product in part a to that in part b is (1~5):1. The temperature of the hot material is higher than the temperature of the ammoniation product in part a. This invention improves the efficiency of the ammoniation reaction, reduces the decomposition side reactions of adipic acid and the residue of adipic acid, and significantly improves the conversion rate of the dehydration reaction and the selectivity of adiponitrile.

The invention relates to the technical field of sealants, and discloses a high-softness butyl sealant without sticking hands and softening wire harnesses and a preparation method of the high-softness butyl sealant. The butyl sealant is prepared from the following raw materials: 5-15 parts of butyl rubber; 3 to 15 parts of polyisobutene; 3-8 parts of petroleum resin; 30-60 parts of an inorganic filler; 15 to 30 parts of a flame retardant; 0.5 to 1.5 parts of a coloring agent; 5-15 parts of a polyester plasticizer; and 5-15 parts of rubber filling oil. The butyl rubber and the polyisobutene are mixed for use, and the hardness of the sealant is suitable for manual operation through a proper proportion; compared with the common plasticizer, the polyester plasticizer has the advantages that the polypropylene glycol adipate is large in molecular weight, low in volatility and low in mobility, cannot migrate to the wire harness from the sealant, and cannot soften the wire harness; the polyester plasticizer and the rubber filling oil are mixed for use, and the sealant has the effect of not sticking hands but sticking lines through a proper proportion.

The invention relates to the technical field of high polymer materials, in particular to high-strength special bisphenol A type modified resin and a preparation method thereof. The invention relates to a high-strength special bisphenol A type modified resin, which is characterized in that the high-strength special bisphenol A type modified resin is obtained by synergistically modifying bisphenol A type epoxy resin through a chemical modifier, physical reinforced particles and curing regulation, and the chemical modifier is a mixture of methacrylic acid, maleic anhydride and diallyl adipate. According to the high-strength special bisphenol A type modified resin, through the synergistic effect of multi-component composite modification, nano SiO2 and carbon fiber synergistic enhancement and gradient curing, the tradeoff contradiction of toughness-strength-heat resistance of a traditional modification technology is broken through, and the high-strength special bisphenol A type modified resin has excellent salt mist resistance and ultraviolet aging resistance and meets the application requirements in the high-end field.

The crude adipic acid thickening device provided in this embodiment of the invention features a central tube and a first porous tube that can move relative to each other. When blowing away the solid portion of the crude adipic acid slurry adhering to the outer filter screen, the central tube and the first porous tube are initially in a closed position. In this state, high-pressure gas cannot escape and remains inside the central tube, causing the pressure inside the central tube to continuously increase until a preset value is reached. Then, the central tube and the first porous tube move from the closed position to the open position. At this time, high-pressure gas is simultaneously and instantaneously released from various points on the first porous tube, blowing away the solid portion of crude adipic acid adhering to the outer filter screen. Compared to direct backflushing of high-pressure gas without accumulation, this embodiment of the invention achieves higher gas pressure inside the central tube. Furthermore, because multiple filter holes on the first porous tube open simultaneously, the pressure of the emitted gas is more uniform, resulting in a better blowing effect.

The invention relates to the technical field of high polymer materials, in particular to an acrylate pressure-sensitive adhesive as well as a preparation method and application thereof. The water-based acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by weight: 60 to 85 parts of soft monomer, 10 to 30 parts of hard monomer, 3 to 8 parts of functional monomer, 0.5 to 3 parts of cross-linking monomer, 1 to 4 parts of reactive emulsifier, 0.2 to 0.8 part of initiator, 0.5 to 2 parts of first cross-linking agent (adipic dihydrazide), 0.5 to 2.5 parts of second cross-linking agent (polyvalent metal ion cross-linking agent) and 90 to 120 parts of water, the functional monomer comprises a strong polar monomer containing carboxyl and / or sulfonic acid group; by introducing the strong polar monomer, adipic acid dihydrazide and the multivalent metal ion cross-linking agent, a'covalent-ionic 'double-cross-linked network is constructed, so that the prepared pressure-sensitive adhesive has low sensitization, high cohesion, excellent skin grease pollution resistance and repeated adhesion.

This invention relates to the field of adipic acid synthesis technology and discloses a method for producing adipic acid with low N2O tail gas emissions. The method includes: Step S1. A first contact reaction is carried out between cyclohexene, hydrogen peroxide, and a first catalyst, wherein the first catalyst is a solid catalyst comprising a tungsten-doped titanium-containing molecular sieve; the liquid phase material from the contact reaction is subjected to oil-water separation to obtain an aqueous phase containing cyclohexane oxide and an oil phase containing cyclohexene; Step S2. A second contact reaction is carried out between the aqueous phase containing cyclohexane oxide and nitric acid and a second catalyst, wherein the second catalyst is a Cu-containing... 2+ V 5+ and Mo 6+ The method utilizes ionic liquid catalysts. It results in low N2O emissions, high exhaust gas absorption rate, low production cost, and is environmentally friendly, showing promising prospects for industrial application.

The invention relates to the technical field of thin film materials, in particular to a PBAT degradable composite material for preparing a thin film and a preparation method and application thereof. The PBAT degradation composite material is prepared from poly (butylene adipate-co-terephthalate), modified nanocellulose and a photosensitizer through melt blending, the photosensitizer is specifically added into the preparation raw materials for preparing the PBAT degradation composite material, the photosensitizer generates active oxygen under ultraviolet light by utilizing a photo-biological synergistic degradation mechanism, ester bonds in PBAT molecular chains are preferentially attacked, and the modified nanocellulose provides microorganism attachment sites to accelerate the enzymolysis process during biological composting; compared with a film without adding the photosensitizer, the tensile strength and the elongation at break of the film prepared by the invention are improved, and the tensile strength and the elongation at break after ultraviolet aging are obviously reduced, so that the degradation of the film is facilitated.