278 results about "Cyclopentene" patented technology

Herbicidally active 3-phenylisoxazoline-5-carboxamides of cyclopentenylcarboxylic acid derivativesThe invention relates to 3-phenylisoxazoline-5-carboxamides of cyclopentenylcarboxylic acid derivatives of the general formula (I) and their agrochemically acceptable saltsand to their use in the crop protection sector.

Compounds having herbicidal activity effective against economically important harmful plants are disclosed. The disclosed compounds exhibit herbicidal activity even at relatively low application rates, while at the same time may exhibit compatibility with crop plants. The disclosed compounds may further be effective and efficient against a large number of weeds and against a broad spectrum of weed grasses. As disclosed herein, 3-phenylisoxazoline-5-carboxamides of S-containing cyclopentenylcarboxylic esters of formula (I) and their salts exhibit herbicidal activity against a broad spectrum of economically important mono- and dicotyledonous annual harmful plants.

The invention relates to a process for recycling and regenerating a waste lithium iron phosphate positive electrode material by using a specific chelating agent. The method comprises the following steps: carrying out heat treatment on a waste lithium iron phosphate positive electrode material, putting separated waste lithium iron phosphate powder into a ball milling tank, adding organic acid and a chelating agent, and carrying out ball milling; after the ball milling is finished, adding hydrogen peroxide, uniformly stirring and mixing, adjusting the pH value to 2-3 by using nitric acid, and filtering to obtain a filter cake which is iron phosphate; adding saturated sodium carbonate into the filtrate, precipitating, and recovering lithium carbonate; putting the iron phosphate, the lithium carbonate, the iron source, the lithium source and the phosphorus source in the step S3 into a ball mill for ball milling, and performing high-temperature solid-phase sintering after ball milling to obtain a regenerated lithium iron phosphate material; the chelating agent disclosed by the invention is prepared from (9ci)-2-(2-propenyl)-1-cyclopentene-1-carboxylic acid, 2-mercaptobenzimidazole carboxylic acid, an ethylene boric anhydride pyridine complex and potassium persulfate. The regenerated lithium iron phosphate material prepared by the method has excellent electrochemical performance.

The invention discloses a preparation method of an optical OCA (Optical Clear Adhesive) and application of the optical OCA in a mobile phone folding screen, and relates to the technical field of optical cement, the optical OCA is prepared from the following raw materials in parts by weight: 50 parts of acrylate prepolymers, 2-4 parts of 3-allyl-2-mercapto-3H-quinazoline-4-ketone, 1-3 parts of diallyl disulfide, 1-3 parts of 3-[N, N-dimethyl formamide], 1-3 parts of 2, 3, 5-trimethyl-1, 3-pentanediol monoisobutyronitrile, 1-3 parts of 2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3 The preparation method comprises the following steps: adding 3-5 parts of N, N-dimethyl-[2-(2-methylpropane-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt, 1-3 parts of allyl succinimido carbonate, 2-4 parts of dicyclopentene methacrylate, 1-3 parts of 1, 3, 5-triacryloyl hexahydro-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5- The invention relates to a graphene quantum dot photoinitiator which is prepared from the following components in parts by weight: 1-3 parts of 1, 3, 5-triazine, 0.8-1.2 parts of a photoinitiator, 1-3 parts of an aziridine cross-linking agent, 1-3 parts of graphene quantum dots, 0.8-1.2 parts of a coupling agent and 40-50 parts of a diluent. The optical OCA adhesive is high in light transmittance and bonding strength, good in weather resistance and excellent in folding resistance.

The present invention relates generally to novel mixtures of (2E)-3-(1, 3-benzodioxol-5-yl)-N-phenyl-N-(tetrahydro-3-furyl)-2-acrylamide and to the use thereof.

A technology for preparing glutaraldehyde through cyclopentene oxidation belongs to the technical field of organic synthesis, glutaraldehyde is prepared through cyclopentene oxidation by adopting a photocatalysis-electrocatalysis synergistic catalyst g-C3N4 / TiO2 (at) Au-Co / N-G. The catalyst is of a unique core-shell structure, is stable in property, promotes an oxygen reduction reaction in a catalysis technology, and has good catalytic activity. The conversion rate of cyclopentene and the selectivity of glutaraldehyde are remarkably improved, and the effect is remarkable.

The invention discloses a preparation method of degradable and recyclable plastic, and belongs to the technical field of polymer preparation. The preparation method comprises the following steps: carrying out esterification reaction on a cyclopentene matrix and alkyl alcohol or alkyl acid to obtain a monomer, and then carrying out ring-opening metathesis polymerization under the action of a catalyst to obtain the degradable and recyclable plastic. The mechanical property of the degradable plastic is close to that of low-density polyethylene, and the degradable plastic can be used for manufacturing packaging bags, so that the degradable plastic can replace LDPE which is difficult to degrade in the packaging field. The degradable plastic prepared by the preparation method disclosed by the invention can be degraded to original monomers under mild conditions, so that 100% recovery of carbon resources is realized. The obtained monomer can be polymerized again to obtain a corresponding polymer, so that closed-loop recycling is realized. The degradable plastic prepared by the invention can be efficiently converted into a plurality of functional polymer materials, and high-value conversion of waste plastic can be realized.

The present invention relates to a tobacco flavor base module, flavor and heated cigarette that improve the consistency of puff by puff, and belongs to the field of tobacco flavors and fragrances. The tobacco flavor base module is composed of the following components: 3,4-dimethyl-1,2-cyclopentanedione slow-release flavor, 3,5-dimethyl-1,2-cyclopentanedione slow-release flavor, methylcyclopentenolone slow-release flavor, ethylcyclopentenolone slow-release flavor, furfural slow-release flavor, 5-methylfurfural slow-release flavor, furfuryl alcohol slow-release flavor, 2-methyltetrahydrofuran-3-one slow-release flavor, 4-hydroxy-2,5-dimethyl-3(2H)furanone slow-release flavor, 3-pentene-2-one slow-release flavor, ethyl maltol slow-release flavor, maltol slow-release flavor, 5-methyl-2-furanmethanol slow-release flavor. The present invention prepares the slow-release flavor by making each component into a slow-release flavor and then mixes it as a tobacco flavor base module, which not only improves the consistency of puff by puff during puffing, but also significantly improves the burnt sweet fragrance characteristics of heated cigarettes.

The invention belongs to the technical field of octafluorocyclopentene gas preparation, and particularly relates to a catalytic synthesis method of octafluorocyclopentene. The method specifically comprises the following step: under the action of a fluorine-chlorine catalyst, carrying out gas-phase catalytic fluorination reaction on 1-chloroheptafluorocyclopentene and anhydrous hydrogen fluoride at 80-120 DEG C to obtain octafluorocyclopentene. The preparation method of the fluorine-chlorine catalyst comprises the following steps: dissolving metal chloride in water, adding a precipitant, and fully stirring for reaction to obtain slurry; filtering the slurry to remove filtrate to obtain a solid, and washing the solid with deionized water until the solid is neutral; adding aluminum nitrate into the washed solid, fully stirring and drying to obtain a precursor of the catalyst; and performing compression molding on the precursor of the catalyst, roasting, and activating to obtain the fluorine-chlorine catalyst. The method is mild in reaction condition and high in catalytic efficiency.

The invention belongs to the technical field of novel material catalysis, and particularly relates to a hollow mesoporous silica supported phosphotungstic acid catalyst and a preparation method and application thereof. According to the invention, the advantages of high specific surface area and regional effect performance of hollow mesoporous silica and the characteristic of adjustable acidity of vacancy heteropolyacid quaternary ammonium salt are innovatively combined, and the cationic surfactant is loaded on the surface of the hollow mesoporous silica, so that the contact surface of raw materials is effectively increased, efficient conversion of reactants is assisted, and the reaction efficiency is improved. The supported catalyst with efficient catalysis and stable performance is obtained. The catalyst can be used for a reaction for preparing glutaraldehyde through heterogeneous catalysis of cyclopentene oxidation, and the reaction condition is mild. Experiments show that under the catalytic system, the cyclopentene conversion rate can reach 90% or above, the glutaraldehyde selectivity is improved to 75% or above, double improvement of the cyclopentene conversion rate and the glutaraldehyde selectivity is successfully achieved, meanwhile, the advantage that the catalyst is easy to separate is achieved, and an efficient solution is provided for industrial application of synthesis of glutaraldehyde through cyclopentene oxidation.

The invention discloses a preparation method of octafluorocyclopentene, which comprises the following two steps of: firstly, reacting 4-cyclopentene-1, 3-diketone with a selective fluorine reagent in acetonitrile under the condition of reflux to generate a crude product second mixture, purifying the second mixture, and putting the purified second mixture into a second-step reaction to obtain the octafluorocyclopentene. Reacting with diethylamino sulfur trifluoride in dichloromethane to generate a third mixture; the method has the advantages of environment-friendly and simple reaction process, no generation of three wastes, low cost, easy obtaining, simple reaction process, mild reaction, no generation of waste gas pollution even if nitrogen protection is needed, easy operation, and suitableness for industrial production.

The invention discloses a method for synthesizing loxoprofen sodium by using a resin catalyst, and belongs to the field of medical chemical synthesis. The preparation method comprises the following steps: synthesizing 2-methylene cyclopentanone through methylenation reaction of cyclopentanone, paraformaldehyde and amine; the preparation method comprises the following steps: reacting 4-halogenated phenylacetate with methyl iodide to synthesize 2-(4-halogenated phenyl) propionate; a target intermediate 2-(4-((5-oxocyclopentyl-1-alkenyl) methyl) phenyl) propionate is generated through a Heck coupling reaction; further reducing to 2-(4-((2-oxygen cyclopentyl) methyl) phenyl) propionate through a catalytic hydrogenation reaction; and finally, carrying out a salt forming reaction to obtain loxoprofen sodium. The method adopts the self-made resin catalyst, is efficient and environment-friendly, has good yield and purity, and is suitable for industrial production.

The invention discloses a preparation method and application of a catalyst with a high-valence tungsten coordination structure, and the preparation method of the catalyst comprises the following steps: enabling tungstic acid and hydrogen peroxide with specific concentration and proportion to react at a certain temperature to prepare a peroxy tungstic acid solution; dissolving a polydentate organic ligand capable of forming a stable chelation structure with a tungsten center in an organic solvent, mixing the obtained ligand solution with a peroxytungstic acid solution according to a specific ratio, and carrying out a coordination reaction at a certain temperature until the ligand is completely reacted; and finally, carrying out solid-liquid separation, washing and drying to obtain the high-valence tungsten coordination structure catalyst. The catalyst can be used for a reaction for synthesizing glutaraldehyde through cyclopentene oxidation, under the mild condition, hydrogen peroxide serves as a green oxidizing agent, the conversion rate of cyclopentene reaches 90% or above, the selectivity of glutaraldehyde exceeds 60%, the catalyst is stable in structure and can be recycled for 10 times or above, and the problems that in the prior art, a catalyst is difficult to separate, low in activity, poor in stability and the like are solved; the method has a remarkable industrial application value.

The present invention relates to the technical field of heated cigarettes, and in particular to a spicy-flavored tobacco flavor for heated cigarettes and heated cigarettes. The tobacco flavor includes, by mass, 0.1-1.5 parts of main aroma components, including Chinese cinnamon bark oil, cinnamic acid, cinnamaldehyde, piperonal, benzyl cinnamate and isoamyl cinnamate; 5.0-14.0 parts of modified components, including plum extract, ethyl acetate, furfural, methylcyclopentenolone, benzaldehyde, phenylacetic acid, vanillin and ethyl vanillin; fixative: 2.0-5.0 parts, the fixative components include Peruvian extract and triacetin; solvent 75.0-93.0 parts. The tobacco flavor can overcome the problems of large taste irritation and obvious spiciness of existing spicy-flavored raw material flavors, and effectively improve and enrich the quality of the suction aroma while giving the heated cigarette a spicy style, and improve the consistency and persistence of aroma release.

The invention relates to a preparation method of alkyl naphthalene and a modified ionic liquid catalyst used in the preparation method. The modified ionic liquid catalyst is obtained by modifying ionic liquid Et3NHCl-AlCl3, Et3NHCl-FeCl3 or Et3NHCl-ZnCl2 with carbon disulfide. The preparation method of the alkyl naphthalene comprises the following steps: enabling naphthalene, cyclopentene and alpha-olefin to react under the action of the modified ionic liquid catalyst in the claim 1, and then performing post-treatment to obtain an alkyl naphthalene product. The carbon disulfide is used for modifying the ionic liquid Et3NHCl-AlCl3, Et3NHCl-FeCl3 or Et3NHCl-ZnCl2, the Lewis acidity of the modified ionic liquid is reduced, and when the modified ionic liquid is used for alkylation reaction of naphthalene, cyclopentene and alpha-olefin, side reactions such as disproportionation can be reduced, and the conversion rate of naphthalene is increased. In addition, the modified ionic liquid catalyst is easier to separate from a reaction mixture, and purification of a target product is facilitated.

The invention provides a 7-acylhydrazone-cyclopentene pyridine compound, a preparation method and application thereof, a pharmaceutical composition and application thereof, and relates to the technical field of medicines. According to the invention, an acylhydrazone group with pesticide activity is connected to the 7th site of cyclopentene pyridine to obtain the cyclopentene pyridine compound containing an acylhydrazone active fragment. The 7-acylhydrazone-cyclopentene pyridine compound provided by the invention contains a special Schiff base structure of a-CONHN = C-substructure, and an acylhydrazone group contains oxygen atoms and nitrogen atoms at the same time, can participate in formation of hydrogen bonds in organisms, has certain flexibility, is firmer in combination with receptors, has wide biological activity, and can be used for preparing a novel compound for preparing the 7-acylhydrazone-cyclopentene pyridine compound. And the compound has good application prospects in preparation of insecticides, bactericides, herbicides, anti-HIV drugs, anti-virus drugs or anti-cancer drugs, especially in plant protection, for example, the compound has good application prospects in preparation of insecticides, bactericides, herbicides, anti-virus drugs, anti-HIV drugs or anti-cancer drugs.

Mixtures configured to etch a thin film of an integrated circuit material are disclosed. The mixtures may include a first compound comprising one or more of: A, B, and C; and a second compound comprising one or more of: oxygen, argon, helium, nitrogen, octafluorocyclobutane (C4F8), hexafluorobutadiene (C4F6), carbonyl fluoride (COF2), difluoromethane (CH2F2), trifluoromethane (CHF3), carbon tetrafluoride (CF4), methyl fluoride (CH3F), octafluorocyclopentene (C5F8), 2,3,3,3-tetrafluoropro-l-ene (C3H2F4), 2,3,3,3-tetrafluoropro-l-ene (C3H2F4), hexafluoropropene (C3F6), hexafluorocyclopropane (C3F6), or 1,1,3,3,3-pentafhioropropene (C3HF5).

The invention discloses an organic compound and application thereof. The organic compound has a structure as shown in a formula I. In the formula I, R1 and R2 represent C1-C15 straight-chain, branched-chain alkyl or alkoxy in a same or different manner at each occurrence, and R1 and R2 represent C1-C15 straight-chain, branched-chain alkyl or alkoxy at each occurrence. Wherein any one or more disconnected-CH2-can be replaced by cyclopropylidene, cyclobutyl, cyclopentadiene or cyclopentadiene,-CH = CH-,-N (Re)-,-O-,-S-,-CO-,-CO-O-and-O-CO-in a form that O-or S-is not connected with each other, and at least one-CH2-in R1 and R2 is replaced by cyclopropylidene, cyclobutyl, cyclopentadiene or cyclopentadiene. The organic compound structure has the characteristics of low melting point, good low-temperature solubility and small normal temperature-high temperature contrast change rate. The liquid crystal material can be uniformly mixed with mixed crystals and completely dissolved at a relatively low processing temperature, and the risk of thermal decomposition or phase change of the liquid crystal material can be reduced. # imgabs0 #

The invention discloses a detection method for electronic grade octafluorocyclopentene. The pre-cutting (removal) column is about 1m long and is a Hastelloy C-grade column with an inner diameter of about 2mm. Silica Gel with a particle size of 0.18mm-0.25mm is filled therein, or other equivalent chromatographic columns are used. The pre-cutting (removal) sampling method specified in GB / T 28726 is used to determine the contents of hydrogen, oxygen+argon, nitrogen, carbon monoxide, methane and other fluorocarbon compounds in the octafluorocyclopentene. The provisions of GB / T 5832.2 are used to determine the water content in the octafluorocyclopentene. An inductively coupled plasma mass spectrometry method is used to determine the contents of metal elements such as sodium, zinc, chromium, copper, nickel and iron in the octafluorocyclopentene. Finally, the purity of the octafluorocyclopentene is accurately determined by a difference subtraction method.

This invention provides a novel phosphine oxide compound that inhibits SHP2, a composition thereof, a method for preparing the compound, and a method for treating SHP2-related diseases (such as cancer).

The present invention provides a method for preparing an α-cadaverine-based compound of the following general formula (3): wherein R 2 represents a monovalent hydrocarbon group having 1 to 9 carbon atoms, the method comprising: making a 3,5,5-trimethyl-3-cyclopentene compound of the following general formula (1): wherein R 2 As defined above, and X represents a leaving group, and the methylating agent of the following general formula (2): wherein M represents Li, Mg, Z 1 、ZnZ 1 、Cu、CuZ 1 or CuLiZ 1 , and Z 1 represents a halogen atom or a methyl group, undergoing a nucleophilic substitution reaction to form an α-cadaverine-based compound (3). The present invention also provides a method for preparing a γ-cadaverine-based compound of the following general formula (4): wherein R 2 represents a monovalent hydrocarbon group having 1 to 9 carbon atoms, and the method comprises: subjecting the thus obtained α-cadaverine-based compound (3) to positional isomerization reaction at the double bond to form a γ-cadaverine-based compound (4). #imgabs0#

The invention discloses a method for co-catalyzing intramolecular cyclization of cis-epoxide by diarylboronic acid and tetrabutylammonium halide, and belongs to the technical field of organic synthesis. According to the method, diarylboronic acid and tetrabutyl ammonium halide are used as catalysts, and the bicyclol is synthesized through intramolecular ring closing reaction of cis-4-hydroxymethyl-1, 2-cyclopentene oxide in an organic solvent; according to the method, a cis-substrate is activated by diarylboronic acid, tetrabutylammonium halide is used as an instantaneous nucleophilic reagent to enable epoxy to be subjected to ring opening, oxygen in the substrate is subjected to intramolecular nucleophilic attack, and then halide ions are removed, so that an intramolecular ring closing product is obtained, and the reaction shows good functional group tolerance. The method has the characteristics of low catalyst dosage (one thousandth), simplicity and convenience in operation, high yield, environment friendliness and mild reaction conditions, and has potential practical application value.

The present application includes a production process, device and method of cyclopentanol. The process includes pyrolyzing a raw material containing dicyclopentadiene to obtain a material A containing cyclopentadiene, mixing it with hydrogen and contacting it with a bimetallic catalyst to undergo a hydrogenation reaction to obtain a material B containing cyclopentene, cyclopentadiene and cyclopentane, mixing it with an acid and a solid acid catalyst to undergo a catalytic esterification reaction to obtain a material C containing fatty acid cyclopentyl ester and fatty acid cyclopentenyl ester, and mixing the material C with hydrogen and then mixing it with a copper-based hydrogenation catalyst to undergo a hydrogenation reaction to obtain a product containing cyclopentanol. The device includes a pyrolysis unit, a selective hydrogenation unit, a catalytic distillation unit and a catalytic hydrogenation unit connected in series in a pipeline; the route has low raw material cost, mild reaction conditions, simple operation, low separation energy consumption, and is suitable for continuous and stable large-scale production. Adding an inhibitor prolongs the life of the catalyst and improves the yield. The yield of cyclopentanol is more than 95% based on cyclic olefins as raw materials.

The invention provides a preparation method of dichlorohexafluorocyclopentene. Perhalogenated cyclopentene or / and perhalogenated cyclopentadiene is used as a raw material and reacts with HF and Cl2 in a tubular reactor filled with a catalyst to generate dichlorohexafluorocyclopentene, the catalyst needs to be used after being activated for 2-12 h in a mixed gas of HF and F2 at the temperature of 200-600 DEG C, and the catalyst is one or more of molybdenum fluoride, nickel fluoride, cobalt fluoride or molybdenum fluoride; the reaction conditions are as follows: the molar ratio of HF to Cl2 to octachlorocyclopentene or hexachlorocyclopentadiene is (4-10): (1-5): 1, the reaction temperature is 200-500 DEG C, the reaction pressure is 0-2.0 MPa, and the catalyst contact time is 5-90 seconds. According to the method, the reaction process is simple, the needed target object is prepared through one-step gas-phase catalytic fluorination, the method is suitable for large-scale production of dichlorohexafluorocyclopentene, the requirement for equipment is low, and the catalyst activity and stability are high.

A slow-reaction recyclable epoxy resin system for structural composites and a process of recycling the composites made therefrom are disclosed. The system includes an epoxy resin component including: a high purity epoxy resin selected from a high purity bisphenol A epoxy resin, a high purity bisphenol F epoxy resin, and combinations thereof, where the high purity epoxy resin is in a range of from 20 wt% to 95 wt% of the total weight of the cyclopentene resin component; a standard epoxy resin selected from a standard bisphenol A epoxy resin, a standard bisphenol F epoxy resin, and combinations thereof, where the standard epoxy resin is in the range of from 1 wt% to 50 wt% of the total weight of the epoxy resin component; and a curing agent component including a curing agent having at least one cleavage bond selected from a group including an acetal bond, a ketal bond, a formal bond, an orthoester bond, or a siloxy bond. The pot life of the slow-reaction recyclable epoxy resin system is greater than 540 minutes at 25 DEG C.

The application belongs to the technical field of fine chemical industry, and discloses a method for synthesizing cyclopentanol, which comprises the following steps: (1) taking cyclopentene and water as raw materials, adding a solubilizer, and mixing to obtain a reaction liquid; (2) continuously hydrating the reaction liquid in a fixed bed reactor filled with a cation exchange resin to obtain a reaction product; and (3) distilling and separating the reaction product to obtain cyclopentanol. The synthesis method has the advantages of simple process flow, environmental protection, low energy consumption, excellent product indexes, and long operation cycle of the catalyst. Polyethylene glycol-400 or polypropylene glycol-400 is used as a single solubilizer, and a specific macroporous strong acid cation exchange resin catalyst is used to realize the efficient and high-selectivity hydration reaction of cyclopentene.

The invention provides a production method of high-purity cyclopentene, and belongs to the technical field of olefin production. According to the method, a crude cyclopentene raw material rich in cyclopentene, cyclopentane and 1, 2-pentadiene is mixed with hydrogen, the mixture is introduced into an adiabatic bubbling bed reactor for a selective hydrogenation reaction, and a catalyst is modified Pd / Al2O3. After hydrogenation reaction liquid is subjected to light component removal and refining, a high-purity cyclopentene product with the content of 99.9% or above and the content of 1, 2-pentadiene being 10 ppm or below is obtained, and the monomer requirement for producing cyclopentene rubber is met.

The application provides a 5-aryl-cyclopentenopyridine compound and a preparation method and application thereof and a plant protection agent, and relates to the technical field of plant protection. The 5-aryl-cyclopentenopyridine compound provided by the application introduces an aromatic group Ar, which can not only increase the stability of the compound molecule, but also interact with amino acids in a receptor protein, thereby improving the biological activity of the compound. The 5-aryl-cyclopentenopyridine compound provided by the application has good antiviral, antibacterial and insecticidal effects, and has a good application prospect in plant protection.

The invention provides a compound type sweet and fragrant flavor composition and an application thereof, and the compound type sweet and fragrant flavor composition comprises maltol, ethyl maltol, methyl cyclopentenolone, ethyl cyclopentenolone, 3, 4-dimethyl-1, 2-cyclopentanedione, 4-hydroxy-2, 5-dimethyl-3 (2H) furanone and 3, 5-dimethyl-1, 2-cyclopentanedione, and the compound type sweet and fragrant flavor composition comprises maltol, ethyl maltol, methyl cyclopentenolone, ethyl cyclopentenolone, 3, 4-dimethyl-1, 2-cyclopentanedione, 4-hydroxy-2, 5-dimethyl-3 (2H) furanone and 3, 5-dimethyl-1, 2-cyclopentanedione. The composition disclosed by the invention has obvious sweet aroma style characteristics and aroma intensity, can effectively increase the sweet aroma flavor and sensory style characteristics of cigarettes, makes up for the defects of light cigarette aroma, insufficient smoke concentration and the like of low-coke cigarettes, can restore the natural feeling of the cigarette aroma, ensures good harmony, and has good application prospects. The method has a wide application prospect in the field of tobacco flavor blending, especially in the aspect of low-coke cigarette flavor enhancement compensation.

Provided is a resin material which has high solvent solubility, while exhibiting a low dielectric constant, a low dielectric loss tangent, and high heat resistance. A polyfunctional vinyl resin represented by general formula (1). In the formula, R1 represents a hydrocarbon group having 1-8 carbon atoms, R2 represents a hydrogen atom and a dicyclopentenyl group, and at least one of R2 represents a dicyclopentenyl group. X represents a hydrogen atom, and at least one of the vinyl group-containing groups represented by formula (1a) is a vinyl group-containing group. And R3 represents a hydrogen atom or an alkyl group or alkenyl group having 1-8 carbon atoms. And n represents a number of repetitions, the average value of which is 1-5. # imgabs0 #-CO-CR3 = CH2 (1a), and a method for producing the same.