155 results about "Abietic acid" patented technology

The invention relates to the field of essential oil slow release, and discloses a mildew-proof tablet containing plant essential oil and a preparation method and application thereof.The mildew-proof tablet containing the plant essential oil comprises two epidermal layers and an essential oil slow-release layer arranged between the two epidermal layers, the preparation method comprises the following steps: grafting sodium abietate and aminated mesoporous silica to prepare functionalized mesoporous silica, loading plant essential oil on the functionalized mesoporous silica to obtain a core material, introducing dihydroxyl polyhedral oligomeric silsesquioxane into a polyurethane main chain, wrapping the core material to prepare an essential oil slow-release agent, taking lignin as a base material, taking the essential oil slow-release agent as an effective component, and preparing the essential oil slow-release agent. And preparing to obtain the essential oil slow-release layer. The prepared essential oil slow-release layer can achieve the effects of essential oil slow release and antibiosis and mildew prevention, the slow-release effect is remarkable under the normal-temperature and high-temperature conditions, the good slow-release effect is still kept in the humid environment, and the efficacy period of the material is greatly prolonged.

The invention discloses a halogen-free low-splashing environment-friendly solder wire and a preparation method thereof, and relates to the technical field of electronic welding materials, and the halogen-free low-splashing environment-friendly solder wire is prepared from the following raw materials in percentage by mass: 1-4wt% of halogen-free scaling powder and the balance of lead-free solder; the lead-free solder is composed of the following components of Cu, Bi, Al, Ga, Ir, Ca, In and Sn. The halogen-free scaling powder comprises the following components: (3, 6-diamino acridine-9-yl) boric acid, glycerol triabietate, 3-(N-morpholinyl)-2-hydroxy propanesulfonic acid sodium salt, 3-trihydroxymethyl methylamino-2-hydroxy propanesulfonic acid, hexahydro-1, 3-ethoxy-s-triazine, a functional copolymer, a surface active agent, a corrosion inhibitor, a halogen-free activity reinforcing agent, an antioxidant, a solvent and rosin resin. The solder wire is low in splashing rate, high in surface resistivity and welding spot reliability, free of obvious corrosivity and good in weldability.

The invention discloses composite graphene conductive paste for a battery, and relates to the technical field of conductive materials, and the composite graphene conductive paste comprises the following raw materials in parts by weight: 1-10 parts of graphene, 1-8 parts of carbon nanotubes, 0.5-1 part of a dispersant, 0.5-2 parts of a stabilizer, 85-90 parts of a solvent, 0.5-1 part of a silane coupling agent KH-550, 1-3 parts of a modified surfactant, and 0.5-1 part of an adhesive. The molecular structure of the modified surfactant contains a nitrogen element, a bromine element and an abietic acid group, so that the performance of the composite graphene conductive paste is improved together, and the application in the field of batteries is met; the invention also discloses a preparation method of the composite graphene conductive paste for the battery. The composite graphene conductive paste for the battery provided by the invention has excellent conductivity, dispersibility, cohesiveness and stability, and meets market requirements.

The invention belongs to the field of polyurethane materials, and particularly relates to full-bio-based microporous polyurethane foam and a preparation method thereof. According to the invention, rosin acid and castor oil are used as raw materials, and rosin-castor oil polyol is prepared through an esterification synthetic route. The microporous polyurethane foam with excellent mechanical properties is prepared by utilizing the synergistic effect of the bio-based polyol and the rosin-castor oil polyol in a certain proportion. In addition, the microporous polyurethane foam prepared from the vegetable fat and the abietic acid is simple and low in cost, and meets the requirements of green sustainable development.

The invention discloses a preparation method of nitrile rubber with improved thermo-oxidative aging resistance, which comprises the following steps: butadiene and acrylonitrile are used as main polymerization monomers, and a reactive anti-aging agent with an amide group is used as a functional monomer; the total addition amount of butadiene and acrylonitrile is 100 parts by mass, and acrylonitrile is added in batches or continuously, preferably more than three times; a low-temperature emulsion polymerization method is adopted, and the compound emulsifier at least contains disproportionated rosin soap, C10-C13 linear alkyl benzene sulfonic acid and naphthalene sulfonic acid formaldehyde condensate sodium salt; the preparation method comprises the following steps of: adding a molecular weight regulator into a compound emulsifier, preferably 3.2-6.5 parts by weight, more preferably 3.8-6.0 parts by weight of the compound emulsifier, adding the molecular weight regulator once or multiple times, synthesizing butyronitrile rubber cement, adding a terminating agent, degassing, condensing, washing and drying to obtain the butyronitrile rubber. According to the invention, the nitrile rubber with good thermo-oxidative aging resistance is produced, wherein the content of bound acrylonitrile is 17-20%, and the binding amount of Mooney viscosity # imgabs0 # reactive anti-aging agent is 1-2%.

The invention provides anti-erosion hydraulic concrete and a preparation method thereof, and belongs to the technical field of concrete. The concrete comprises the following components: composite cement, high-activity nano-modified metakaolin, blast furnace slag powder, low-calcium fly ash, coarse aggregate, natural river sand fine aggregate, granite machine-made sand fine aggregate, an erosion inhibitor, a functional additive, an early-strength polycarboxylic high-performance water reducer, a composite air entraining agent and the like. The composite cement comprises sulphoaluminate cement, Portland cement and polymer waterproof mortar. The high-activity nano modified metakaolin is obtained by modifying metakaolin with an organic silicon-ZnO composite emulsion and then drying. The erosion inhibitor comprises organic carboxylate, a hydrophobic-crystallization complexing agent and a pH buffer type corrosion inhibitor. The functional auxiliary agent comprises an itaconic acid and acrylic acid copolymer, a JRY-F concrete waterproof agent and polyethylene glycol-400 dilaurate. The composite air entraining agent comprises liquid sodium abietate and sodium alpha-olefin sulfonate. Through component synergism, modification and grading, an anti-erosion barrier is constructed.

The invention relates to the technical field of tire production, in particular to a self-repairing new energy tire and a production method thereof. The production method of the self-repairing new energy tire comprises the following steps: mixing an amino-terminated polyether monomer, a trimerization catalyst, a chain extender, abietic acid, a Grubbs catalyst, self-repairing microcapsules and meta-aramid staple fibers to obtain a component A; pre-polymerizing an amino-terminated polyether monomer, a disulfide bond-containing monomer, a trimerization catalyst and 1, 6-hexamethylene diisocyanate to obtain a component B; the component A and the component B are mixed to obtain the self-repairing adhesive material; the inner surface of a new energy tire body is coated with a self-repairing bonding material, then mute cotton is bonded to the surface of the self-repairing bonding material, and the self-repairing new energy tire is obtained. The self-repairing new energy tire provided by the invention is provided with the high-performance self-repairing bonding material layer, and the self-repairing bonding material has high structural strength, long service life and excellent self-repairing performance, heat resistance, bonding performance and mute performance.

The application discloses a degradable rosin-based epoxy foam and a preparation method and application thereof, and belongs to the technical field of shielding materials, and comprises the following steps: stirring and uniformly mixing propylenediamine-based latent foaming agent, propylenediamine, propylene abietic acid glycidyl ester and 1,3-bis(3-glycidyloxypropyl)-1,1,3,3-tetramethyldisiloxane, and obtaining the degradable rosin-based epoxy foam through reaction.The foaming agent used in the application is rapidly decomposed under heating conditions to release carbon dioxide and the curing agent propylenediamine, and the preparation is simple, environment-friendly and residue-free; the prepared epoxy foam is easy to degrade, excellent in electromagnetic shielding and joule heating performance, and has a wide application prospect in the fields of military equipment, aerospace and wearable electronic devices.

The invention discloses an application of water-soluble rosinyl tricarboxylate in precipitation removal and enrichment recovery of heavy metal ions. Natural rosin reacts with fumaric acid to obtain fumaric acid, the fumaric acid is alkalized to obtain rosinyl tricarboxylate, the rosinyl tricarboxylate and heavy metal ions such as copper, cadmium and lead in water can easily form solid precipitates at room temperature, and the heavy metal ions in the water can be adsorbed, removed or recycled after simple filtration. The product has a good effect of removing heavy metal ions in water, the removal efficiency of copper, cadmium and lead can reach 99.9% or above, and the residual quantity of the heavy metal ions in the treated water meets the standard requirement of drinking water; the product disclosed by the invention can also be used for recycling rare metals in industrial wastewater. The product can be regenerated and reused, has the characteristics of environmental protection, low cost, high adsorption efficiency, easiness in desorption, simplicity and convenience in regeneration, wide adaptability and the like when being used for treating heavy metal ion pollution in water, and has excellent application prospects and social and economic benefits when being used for treating industrial and mining enterprise wastewater containing metal ions.

Presently described are bio-based hot-melt adhesive compositions including rosin acids or derivatives thereof and an amphiphilic agent that provide adhesives with a high softening point, improved heat resistance, low melt viscosity, and compatibility with hydrocarbon compositions including polyolefins and waxes used in hot-melt adhesives.

The present invention is directed to a method for acidulation of tall oil soap in an alcohol selected from methanol, ethanol and / or iso-propanol. In the method according to the present invention, a mixture comprising sodium salts of fatty acids and rosin acids and an alcohol selected from methanol, ethanol and / or iso-propanol is acidulated using carbon dioxide.

The invention belongs to the technical field of preparation of nail polish compositions, particularly relates to a bio-based perfume nail polish composition and a preparation method thereof, and provides the following scheme aiming at the problems of high emission of volatile organic compounds (VOC), serious environmental pollution, potential health risks and the like due to the fact that existing nail polish usually uses a petroleum-based solvent and synthetic resin. The invention relates to a sugarcane-fermented ethanol beverage which comprises the following raw materials in parts by weight: 30-60 parts of sugarcane-fermented ethanol, according to the invention, sugarcane fermented ethanol, acetyl tributyl citrate, diethyl lauroyl glutamate, zein, konjac glucomannan, abietic acid methacrylate, neroli oil, cananga odorata oil, sodium alginate, chitosan, mineral mica, alkannin, panthenol, organic bentonite, carnauba wax nanoparticles and a photoinitiator are used; the pollution to the environment and the dependence on non-renewable resources are effectively reduced, and the potential harm to human health is reduced.

The invention provides biodegradable industrial lubricating oil and a preparation method thereof, and belongs to the technical field of lubricating oil. Carboxyl is introduced into chitosan molecules through oxidation reaction, so that the molecular structure of the chitosan molecules is optimized, and nanofibers with high specific surface area are prepared; meanwhile, long-chain fat groups are grafted by utilizing amidation reaction, so that the hydrophobicity and the lubricating property are improved; bio-based ionic liquid is further introduced to enhance the dispersity, the thermal stability and the wear resistance; rosin-polyphenol prepolymer is prepared through reaction of abietic acid, maleic anhydride and polyphenol, combination of high thermal stability of abietic acid and oxidation resistance of polyphenol is achieved, hydrogen bonds and ionic bonds are formed by introduction of polyacid, and chemical stability of the compound is effectively enhanced; and by adopting a microencapsulation technology, the slow release and dispersity improvement of active ingredients are realized, so that the oxidation resistance, the lubricity and the long-acting stability of the lubricating oil are remarkably enhanced.

Provided is a method for producing a polymer latex, comprising a step for obtaining an emulsion by emulsifying a polymer solution of a synthetic polyisoprene and / or styrene-isoprene-styrene block copolymer in water in the presence of rosin and / or a metal salt of rosin; and a step of removing the organic solvent from the emulsion, in the rosin and / or the metal salt of the rosin, the content ratio of the total of abietic acid, neoabietic acid, pinolenic acid and salts thereof is 5% by weight or less, the content ratio of dehydroabietic acid is 80-100% by weight, and the content ratio of the rosin and / or the metal salt of the rosin is 5% by weight or less. The content ratio of the rosin and / or the metal salt of the rosin in the polymer latex is more than 1.5 parts by weight with respect to 100 parts by weight of the total of the synthetic polyisoprene and / or the styrene-isoprene-styrene block copolymer contained in the polymer latex.

The invention discloses a rosin modified wood primer and a preparation method thereof. The wood primer is prepared from the following components in percentage by mass: 15-20% of fatty acid, 15-20% of abietic acid, 15-20% of polyhydric alcohol, 0.1-0.5% of a color reducing agent, 25-35% of polybasic acid and 20-30% of a diluent. Various reaction raw materials are screened out through a large number of experiments, the woodware primer prepared through abietic acid modification, adjustment of the proportion of fatty acid, mono-acid and abietic acid in dry resin and formulation of reasonable specific reaction steps is good in paint film transparency, fast in drying, light in color, good in flexibility and impact resistance, good in weather resistance and good in weather resistance. Particularly, the permeability is high, and the anti-collapse performance is excellent.

The application relates to the technical field of synthetic rubber, in particular to a nitrile rubber, a preparation method and application thereof, wherein the preparation method adopts at least potassium saponification soap and / or sodium saponification soap of disulfated rosin acid, C 10 -C 13 A composite emulsifier system composed of linear alkyl benzene sulfonic acid and naphthalene sulfonic acid formaldehyde condensate sodium salt and a low-temperature emulsion polymerization process, and the obtained nitrile rubber can be used in the field of oil-resistant sealing in a hydraulic oil operation environment.

The invention provides a high-toughness low-temperature-resistant PE material and a reagent bottle thereof, and belongs to the technical field of macromolecules. The composite material comprises high molecular weight polyethylene, maleic anhydride grafted low molecular weight polyethylene, a toughening agent, a p-methylsalicylic acid amphiphilic block oligomer, a hydrogenated abietic acid amphiphilic block oligomer and an antioxidant. Through cooperation of multiple components, the performance of the polyethylene material is broken through; the key point is that two amphiphilic block oligomers with complementary functions are introduced at the same time: one of the amphiphilic block oligomers ensures that stress is efficiently transferred between a matrix and a flexibilizer, and the potential of the flexibilizer is fully exerted; another one creates a nanoscale energy dissipation center within the matrix, initiating micro-plastic deformation. And the two collaboratively construct a three-dimensional toughening network. And finally, the high strength of the material is maintained, the impact toughness far beyond that of a conventional system is obtained, and the industrial problem that the strength and the toughness are difficult to consider is solved.

Blends containing a homogeneous mixture of i) vegetable oil fatty acids from annual crop plants and ii) rosin acid are provided for use in metal cutting fluids and in other products employing tall oil derivatives. The blends may be combined with an emulsifying agent and water under high shear conditions to form metal cutting fluid emulsions, may be used as lubricity additives to improve the performance of non-emulsified metal cutting fluids, and may be used in other products including oilfield additives, detergents, soaps, surfactants, mining fluids, and resins.

The invention discloses an offset printing ink binder and a preparation method thereof, and belongs to the technical field of printing ink preparation, the offset printing ink binder comprises the following components by weight: 100 parts of phenolic resin slurry, 70-100 parts of modified abietic acid resin, 50-100 parts of vegetable oil, 10-50 parts of mineral oil, and 1-5 parts of a gel; the modified abietic acid resin comprises resin A and resin B, wherein the resin A is a polyhydric alcohol esterification modified product obtained by sequentially carrying out acylating chlorination and esterification reaction on maleopimaric acid serving as a raw material; the resin B is prepared by the following steps: performing an aminomethylation reaction on acetophenone, formaldehyde and amino polyol to prepare aryl modified polyol, and esterifying the aryl modified polyol with abietic acid to prepare an esterification modified product; the offset printing ink binder disclosed by the invention is based on the modified abietic acid condensed phenolic resin, and meanwhile, the drying speed and the adhesive force of printing ink are improved.

The present invention belongs to the technical field of biological medicine, and discloses a ceramide compound shown in Chemical Formula I: #imgabs0# wherein, R 1 is selected from the residues after condensation of sialic acid, chelidamic acid monohydrate, 2,5-furandicarboxylic acid, quinic acid, chlorogenic acid, ectoine, nicotinic acid, shikimic acid, glucuronic acid, salicylic acid, carnosic acid, dihydrooat acylanthranilic acid, abietic acid, ursolic acid, tranexamic acid, syringic acid, gentisic acid, vanillic acid, 5-hydroxyisovanillic acid, orotic acid, 5-aminoorotic acid, 3,5-dihydroxy-4-methylbenzoic acid, glycyrrhizic acid or gallic acid, R 2 is selected from one of the following structures: -C 15 H 29 、-C 15 H 31 、-C 15 H 27 、-CHOHC 14 H 27 、-CHOHC 14 H 29 . The present invention also discloses a preparation method and application of the ceramide compound. The present invention introduces a molecular fragment with physiological activity of a functional carboxylic acid into ceramide, which will enhance the original efficacy of this type of molecule and also improve the physicochemical properties of the ceramide compound.

The invention discloses application of terpenoids in preparation of a preparation for improving salt resistance and / or drought resistance of plants. The terpenoid is abietic acid (AA), is applied to seeds, seedlings or grown-up seedlings of plants such as wheat, millet, corn and the like subjected to salt stress and / or drought stress through a soaking or irrigation method, and can remarkably improve the germination rate, bud length, root length and fresh weight of the plant seeds under the salt stress and the drought stress; the survival rate, plant height, root length, fresh weight, chlorophyll content, single spike weight and single spike grain number of plant seedlings are improved, and the salt stress and drought stress resistance of plants is improved. The application of AA under normal conditions has no adverse effect on the growth and development of plants. Therefore, AA plays an important role in improving the salt tolerance and drought resistance of plants. The application method provided by the invention is simple in use method, remarkable in effect, safe, reliable and huge in application potential, and meets the requirements of agricultural sustainable development of saline-alkali soil and dry land.

The coating may be used to hinder agglomeration and dust formation when the seed is treated. An aqueous emulsion suitable for coating seeds and other substrates may comprise: an aqueous fluid; from 5% to 60% by weight, based on total solids, of at least one wax; and 0.1% to 45% by weight, based on the total solids, of at least one abietic acid, which is at least partially neutralized by at least one base. One or more additional additives may also be present in the aqueous emulsion.

The invention relates to the technical field of coal washing, and particularly discloses a synthesis process of an environment-friendly coal washing flotation reagent collecting agent. According to the process, abietic acid modified vegetable oil is used as a raw material, the amphiphilic structure collecting agent is constructed through a three-step method, the obtained collecting agent has high collecting performance and environmental compatibility, and the clean coal recovery rate can be increased while the dosage of the agent is reduced; aromatic ring adsorption on the surface of coal is enhanced through a rigid abietic acid skeleton, hydrophilicity is improved through a sulfonated chain, and efficient mineralization of coal particles is achieved in combination with the interface regulation and control effect of a biosurfactant. No toxic solvent participates in the whole process, the byproduct is only water vapor, the method is suitable for flotation of various coal types such as coking coal, gas coal and lignite, and the industrial problem that the surface hydrophobicity of oxidized coal is poor is particularly solved.

A pre-coated composite film transfer printing process, comprising the following steps: S1, release layer coating: coating the surface of a BOPP base film with a release layer solution by using an anilox roll, and performing segmented heating and drying to form a release layer; S2, ink layer coating: coating the release layer obtained in step S1 with a dyeing solution by using the anilox roll, and performing segmented heating and drying to form an ink layer; S3, adhesive layer coating: melting an EVA hot-melt adhesive, then adding hexagonal boron nitride, rosin acid, and white birch tree extract, mixing at 100-200 r / min for 5-10 min, and then coating the ink layer obtained in step S2 with the mixture by using a heated anilox roll; S4, enabling the film coated with the hot-melt adhesive and obtained in step S3 to pass through a cooled anilox roll, curing in an air cooling chamber, and slitting and rolling to obtain a pre-coated composite film; and S5, laminating, by means of hot pressing, the pre-coated composite film obtained in step S4 on the surface of a packaging material. In the process, hexagonal boron nitride, rosin acid, white birch tree extract, and the like are added to an EVA hot-melt adhesive to improve the processability of the EVA hot-melt adhesive, enhancing the bonding effect between a composite film and a print substrate, and achieving simple operation. The prepared pre-coated composite film can satisfy the requirements of thermal transfer printing, has a wide range of applications, and is beneficial to industrial production.

The invention discloses bio-based resin capable of being recycled in a closed-loop mode and a preparation method and application of the bio-based resin. According to the resin material, bio-based polybasic acid serves as a raw material and is mixed with 4-carboxyphenylboronic acid, then the mixture and ethylene glycol diglycidyl ether are subjected to an epoxy ring-opening reaction to prepare a bio-based monomer with the end group being boric acid, and the resin is prepared after the monomer is subjected to cross-linking polymerization. Wherein the bio-based polybasic acid is azelaic acid, sebacic acid, Brazil acid, acrylic abietic acid, eleostearic acid anhydride, maleated rosin and the like. The end group of the bio-based monomer is boric acid bonds, and small molecule amine is subjected to catalytic dehydration to form dynamic boric acid ester, so that the monomer is cross-linked to prepare a material with closed-loop recovery, shape memory and self-repairing performance, and the material has wide application prospects in the fields of 3D printing, flexible sensors and friction generator materials.

The invention discloses a preparation method of an SERS (Surface Enhanced Raman Scattering) substrate based on an Ag NPs / Au NWs / FP composite material and an application of the SERS substrate in abietic acid detection, and the preparation method is characterized by comprising the following steps: cutting filter paper into uniform small pieces, then sequentially cleaning the small pieces with ethanol and water under an ultrasonic condition, drying the small pieces of FP, immersing the small pieces of FP in a gold nanoparticle solution for 5 minutes to 3 hours, and cleaning and drying to obtain Au NPs / FP; mixing the Au NPs / FP with ethanol, an ethanol solution of 4-MBA, a HAuCl4 solution and an L-ascorbic acid solution, and standing at room temperature to obtain Au NWs / FP; ag NPs is uniformly deposited on the surface of Au NWs / FP through a magnetron sputtering method, the SERS substrate based on the Ag NPs / Au NWs / FP composite material is obtained, and the SERS substrate based on the Ag NPs / Au NWs / FP composite material has the advantages that SERS sensitivity and detection stability can be enhanced, and high-precision quantitative analysis of abietic acid can be achieved.

The invention relates to the technical field of curing agents, in particular to a abietic acid type biomass soil curing agent and a preparation method thereof. The curing agent comprises the following raw materials in parts by weight: 1-50 parts of abietic acid (ABA), 10-70 parts of acrylic acid (AAc), 5-60 parts of acrylamide (AAm), 1-20 parts of a cross-linking agent, 1-40 parts of an initiator and 1-30 parts of a catalyst. The preparation method comprises the following steps: preparing acrylpimaric acid (ABA-AAc), and carrying out polymerization reaction under the action of an initiator and a catalyst to synthesize the curing agent. The biomass curing agent is a novel biomass environment-friendly curing agent and has the characteristics of no toxicity, no pollution, good compatibility, small contractility and high curing speed, and cured soil is good in wear resistance, high in strength and high in hardness. The preparation method of the curing agent is simple, convenient to operate and low in industrial scale production cost.

The invention relates to the technical field of graphene materials, and discloses a modified graphene material and a preparation method thereof.The preparation method comprises the steps that sodium lignin sulfonate is used for modifying graphene oxide through pi-pi stacking, and water-based stable dispersion liquid is prepared; saponified abietic acid is introduced, so that a abietic acid radical tricyclic hydrophobic skeleton is attached to the surface of graphene; compounding tung oil emulsion, performing free radical oxidation polymerization on alpha-eleostearic acid conjugated triene double bonds at the normal temperature of 15-35 DEG C to form a film, and covalently bonding graphene into an organic film-forming system through phenol-oxygen free radical coupling; zinc borate is added, zinc ions catalyze and solidify and promote generation of zinc abietate, and borate radicals and sodium lignin sulfonate hydroxyl form an inorganic borate cross-linked network; and adjusting the solid content and grinding to obtain a finished product. The prepared conductive ink is self-dried and cured at normal temperature, a cured coating has excellent water resistance and conductive stability, and the conductive ink is suitable for a heat-sensitive flexible base material.

The application relates to the technical field of anticorrosive coatings, and discloses an anticorrosive phenolic aldehyde epoxy resin coating for oil pipes and a preparation method thereof, which comprises 100 parts by weight of phenolic aldehyde epoxy resin, 18-30 parts by weight of a curing agent and 5-15 parts by weight of amino rosin modified graphene; the amino rosin acid ester structure is grafted on the surface of graphene oxide, the interface compatibility between the graphene and the phenolic aldehyde epoxy resin is improved, the dispersibility of the graphene in the coating is improved, the hardness, salt mist resistance, water resistance and corrosion resistance of the coating film are improved, the uniformly dispersed graphene also has a good improvement effect on the heat resistance of the coating film. Moreover, the amino rosin acid ester contains active amino groups, can form a co-curing system with polyether amine D230 and the like, and can be used for curing reaction of the phenolic aldehyde epoxy resin, so that the hardness, hot water resistance and thermal weight loss temperature of the coating film are improved.

The invention discloses a tall oil acid production method based on synergy of chemical conversion and physical separation, and belongs to the technical field of oleochemical industry. The method creatively utilizes Diels-Alder reaction characteristics of abietic acid and maleic anhydride, and is realized by the following steps: firstly, carrying out vacuum dehydration and degassing pretreatment on crude tall oil; then adding metered maleic anhydride to perform selective conversion under the catalysis of Lewis acid according to the content requirement of the target product abietic acid; performing molecular distillation separation on the reaction product to obtain light fraction fatty acid and heavy fraction abietic acid maleic anhydride resin; and finally, freezing and squeezing to obtain a tall oil acid product with precisely controllable abietic acid content. The technical limitation of a traditional physical separation method is broken through, the added value of the byproduct resin is increased by 50% or above, energy consumption is reduced by 35%, and the method is particularly suitable for customized production of medicine-grade, food-grade and other high-added-value products.