35 results about "Vinyl ester" patented technology

The present invention provides a thermosetting resin composition for electromagnetic wave shielding, a bulk molding compound, and a molded product thereof, which are excellent in fluidity, injection molding property, compression molding property, and in which a molded product excellent in electromagnetic wave shielding property can be obtained. The thermosetting resin composition for electromagnetic wave shielding is characterized by containing a thermosetting resin (A) containing an unsaturated polyester resin (a1) and a vinyl ester resin (a2), a low shrinkage agent (B), a thickening agent (C) containing acrylic resin particles (c1) and magnesium oxide (c2), a thermally conductive filler (D), and a reinforcing material (E).

This invention discloses an ethylene alcohol-vinyl acetate-medium-long alkyl carboxylic acid vinyl ester copolymer and its preparation method, belonging to the technical field of preparation of copolymers containing ethylene alcohol structural units. The copolymer has a number average molecular weight of 5,000 to 500,000 and is composed of ethylene alcohol-based structural units (a), vinyl acetate-based structural units (b), and medium-long alkyl carboxylic acid vinyl ester-based structural units (c). The preparation method provided by this invention has mild reaction conditions, simple operation, and is easy to industrialize.

The present invention relates to a longitudinally and transversely extending pre-impregnated fiber sheet (20a, 20b) comprising a first fiber layer (21) forming part of the upper surface of the pre-impregnated fiber sheet and a second fiber layer (22) forming part of the lower surface of the pre-impregnated fiber sheet, wherein the first fiber layer is pre-impregnated with an adhesion promoter. The present invention also relates to methods for manufacturing a blade housing element or a wind turbine blade comprising a prefabricated spar cap (100) and several pre-impregnated fiber sheets (20a, 20b) arranged to achieve improved adhesion between the blade housing (80) and the prefabricated spar cap, particularly when the prefabricated spar cap is impregnated with vinyl ester resin or epoxy resin and the blade mold is impregnated with polyester resin.

Disclosed herein is an agrochemical composition including an agrochemical active ingredient and a cleaning composition including cleaning additives, each further including at least one novel graft polymer including a polymer backbone (A) as a graft base having polymeric sidechains (B) grafted thereon. The polymeric sidechains (B) are obtained by polymerization of at least one vinyl ester monomer (B1), and optionally further monomers. The polymer backbone (A) includes polyalkylene-oxide-derived moieties and moieties derived from lactone(s) and / or hydroxy acid(s), those moieties being mixed such that the polymer backbone contains ester-functions within the polymer chains.Also disclosed herein are the graft polymer and its production.

To provide a method for producing EVOH pellets having high dimensional stability and productivity.SOLUTION: There is provided a method for producing pellets of an ethylene-vinyl ester copolymer saponification product, which comprises: a coagulation step in which a solution of an ethylene-vinyl ester copolymer saponification product is extruded in a strand shape into a coagulation liquid to obtain a coagulated product; and a cutting step of cutting the coagulated product to obtain pellets, wherein the coagulation liquid has two or more different temperature ranges in the coagulation step and the ethylene-vinyl ester copolymer saponification product extruded in a strand shape contacts with a coagulant having a temperature range 1 of -10°C or more and 40°C or less, followed by contacting with a coagulant having a temperature range 2 of 45°C or more and 80°C or less.SELECTED DRAWING: None

Provided is a resin composition containing: a vinyl ester resin (A) having an epoxy group and an acid value of less than 1 KOHmg / g; at least one type of monomer (B) selected from radical-polymerizable monomers and epoxy monomers and excluding methacrylic acid; methacrylic acid (C); and a thickening component (D). In the resin composition, the content ratio of component (C) to component (D) ([methacrylic acid] / [thickening component]) in terms of a mass ratio is 0.5-4.5.

This invention relates to a method for producing an aqueous polymer dispersion by free radical-initiated aqueous emulsion polymerization of a monomer composition comprising 50% to 99.9% by weight of at least one (meth)acrylic acid C1 to C2. 10 Alkyl esters and / or vinyl aromatic compounds (Class I), or at least one vinyl aromatic compound and conjugated aliphatic diene by weight of 50% to 99.9% (Class II), or vinyl acetate, vinyl propionate, vinyl tert-carbonate, long-chain fatty acid vinyl esters and / or ethylene by weight of 50% to 99.9% (Class III), these amounts being based on total monomers in each case, the method being carried out by polymerizing the composition in the presence of an oligosaccharide having 1.5 to 10 β-1,4-glycosidic bonds linking pyranose units; relating to the dispersion obtained accordingly; and relating to the use of the dispersion as a binder, adhesive, sizing agent for fibers, for the production of coatings or for the production of paper coating formulations.

Provided are: a thermosetting resin composition which has excellent fluidity, injection moldability, and compression moldability, and which is capable of obtaining a molded article having excellent thermal conductivity; a bulk molding compound; and a molded article thereof. The thermosetting resin composition is characterized by containing a thermosetting resin (A) containing an unsaturated polyester resin (a1) and a vinyl ester resin (a2), a low shrinkage agent (B), a thickener (C) containing acrylic resin particles (c1) and magnesium oxide (c2), a thermally conductive filler (D) containing a thermally conductive filler (D), and a reinforcing material (E). The thermally conductive filler (D) contains a thermally conductive filler (d1) having an average particle diameter of 100 [mu] m or more and 500 [mu] m or less and a thermally conductive filler (d2) having an average particle diameter of 10 [mu] m or more and less than 100 [mu] m.

Fire retardant paint compositions comprising polymeric binders derived from vinyl ester monomer, polyphosphate salts, nitrogen containing blowing agents, and charring agents are provided. When applied to substrates the paint compositions form durable coatings useful in protecting the substrates from fire.

The application relates to the technical field of packaging printing ink, and discloses a packaging printing ink capable of being cured by ultraviolet light and a production process thereof, the packaging printing ink comprises additives such as wear-resistant fillers and antioxidant fillers, wherein the wear-resistant fillers are prepared by grafting vinyl ester resin on the surface of nano-hydroxyapatite, the vinyl ester resin can improve the compatibility of the nano-hydroxyapatite and a base material, can directly bear and disperse part of pressure and shear force, avoids stress concentration on the base material, reduces a friction coefficient, thereby reducing wear, meanwhile, the vinyl ester resin has good toughness, and can improve the folding resistance of an ink film; the antioxidant fillers are prepared by introducing vanillic acid into butyronitrile rubber with alkenyl groups, the vanillic acid has antioxidant property, the alkenyl group can participate in subsequent curing, the vanillic acid is introduced into a molecular chain of the ink, meanwhile, migration of the vanillic acid is avoided.

The application belongs to the technical field of protection, and discloses a kind of bionic composite protective material and application.Bionic composite protective material includes alloy material piece and the interlaced structure formed by high-performance reinforcing fiber interweaving and the thermosetting resin wrapped outside interlaced structure, thermosetting resin is selected from at least one of epoxy vinyl ester resin, phenolic epoxy resin, polyurethane modified epoxy resin, acrylate resin and polyimide resin, alloy material in alloy material piece is metal material modified by laser minimally invasive, cauterization and interface compatibility agent, metal material is selected from at least one of low alloy high strength steel, stainless steel, aluminum alloy, magnesium alloy and titanium alloy;The mass ratio of alloy material piece and high-performance reinforcing fiber is 1:1-2.The bionic composite protective material has good rigidity and toughness, and has anti-violence, anti-impact, radar reconnaissance resistance, pulse weapon damage resistance.

This invention belongs to the field of biochemical technology, specifically disclosing a 6′- O A whole-cell biosynthesis method for caffeoyl arbutin and its analogues includes the following steps: using aromatic carboxylic acids and vinyl acetates as substrates, performing a transvinylation reaction under palladium catalyst and base conditions to prepare aromatic vinyl esters; using the prepared aromatic vinyl esters as acyl donors, ... β Arbutin, using acyl acceptors, undergoes an aromatic acylation reaction in an organic solvent with whole cells of Aspergillus oryzae as a catalyst to yield the 6′- O Caffeoyl arbutin or its analogues. This invention develops a two-step whole-cell catalytic method for the efficient and sustainable synthesis of CA and its analogues. The synthesized compounds exhibit potent inhibitory activity against mushroom tyrosinase. This invention pioneers a novel green biosynthetic pathway for tyrosinase inhibitors, demonstrating significant application potential in the food preservation and cosmetics industries.

The application relates to the technical field of high polymer materials, in particular to a light-transmitting and heat-insulating water-based ink as well as a preparation method and application thereof. Steps: S1. Preparing a pre-dispersion liquid: mixing deionized water, an emulsifier, an initiator, a defoaming agent, zirconium acrylate and transparent near-infrared shielding nano-oxide to uniformly disperse, and preparing the pre-dispersion liquid; S2. Preparing a seed emulsion: mixing deionized water, an emulsifier, a pH buffer and at least one polymerization monomer selected from acrylic monomers, acrylate monomers, vinyl ester monomers and acid anhydride monomers to prepare the seed emulsion; S3. Under the protection of inert gas, the seed emulsion prepared in S2 is added into a reaction kettle and heated; then the pre-dispersion liquid prepared in S1 is added dropwise into the reaction system to perform emulsion polymerization reaction, and a hybrid emulsion is prepared; S4. Preparing a water-based ink, and the light-transmitting and heat-insulating water-based ink is prepared. The application has good dispersion stability and storage stability.

This invention provides a vinyl ester resin monomer and its preparation method, a vinyl ester resin cured product and its preparation method, and a vinyl ester resin composite material and its preparation method, belonging to the field of flame retardant materials technology. This invention provides a vinyl ester resin monomer having the structure shown in Formula I. This invention introduces diethyl phosphite into the vinyl ester structure, forming a phosphonate structure, enabling the flame-retardant vinyl ester resin composition to have good char-forming ability without adding any flame retardant, effectively blocking heat and oxygen exchange, thereby possessing excellent flame-retardant properties and exhibiting low smoke and heat release.

This invention discloses a low-shrinkage vinyl ester glass flake paint and its preparation method; specifically, it includes the following steps: 1) pre-dispersing vinyl ester resin, double-terminated vinyl silicone oil, and styrene, maintaining a constant temperature, and dispersing evenly within a specified time; 2) continuing to add thixotropic agents, dispersants, defoamers, polymer fillers, glass flakes, etc., and dispersing evenly within a specified time to obtain a uniform viscous coating; 3) curing the obtained coating with an accelerator, curing agent, and free radical inhibitor in a certain proportion, with different amounts of curing agent used at different temperature gradients. This invention has the following advantages: the product has low shrinkage, resulting in a paint film that is resistant to peeling and flaking; the paint film also possesses excellent water resistance, solvent resistance, and acid resistance; and it is convenient to apply, avoiding the traditional "resin pre-coating" and two-step method.

To provide a method for producing EVOH pellets having high dimensional stability and productivity.SOLUTION: There is provided a method for producing pellets of an ethylene-vinyl ester copolymer saponification product, which comprises: a coagulation step in which a solution of an ethylene-vinyl ester copolymer saponification product is extruded in a strand shape into a coagulation liquid to obtain a coagulated product; and a cutting step of cutting the coagulated product to obtain pellets, wherein in the solidification step, the discharge speed of the strand extruded into the coagulation liquid is 1.3 kg / (hour / hole) or more and the coagulation liquid contains at least one salt selected from the group consisting of an inorganic acid salt and an organic acid salt in an amount of 2 mass% or more and 25 mass% or less.SELECTED DRAWING: None

The application belongs to the technical field of organic polymer compound preparation, and relates to an oilfield water injection and polymer injection glass steel pipeline material and a preparation method, which comprises, from inside to outside, an anticorrosive wear-resistant inner layer and a high-pressure anti-aging outer layer; the anticorrosive wear-resistant inner layer comprises epoxy vinyl ester resin, graphene-polytetrafluoroethylene composite powder, nano silicon dioxide, nano zinc oxide, isothiazolinone microbial inhibitor, methyl tetrahydrophthalic anhydride curing agent and dimethyl aniline accelerator; the high-pressure anti-aging outer layer comprises bisphenol A type epoxy resin, phenolic resin, surface modified glass fiber, nano silicon carbide, aromatic amine curing agent, triethanolamine accelerator, polysulfide rubber toughening agent, ultraviolet absorber, antioxidant and nano boron nitride; through overall cooperation of component matching and process improvement, the performance is obviously improved, the oilfield water injection and polymer injection complex working conditions are adapted, and a plurality of technical shortcomings of the existing glass steel pipeline are solved.

This invention discloses a reactive phosphorus-nitrogen synergistic ionic liquid flame retardant, its preparation method, and its application. The flame retardant has the general formula [A⁺]n[Bⁿ⁻], where [A⁺] is an imidazolium cation containing a polymerizable alkenyl group (such as vinyl), and [Bⁿ⁻] is a phosphorus-containing anion (such as phytate, n=6). The preparation method involves an ion exchange reaction with stoichiometric addition of materials. This flame retardant can be applied to unsaturated polyester and vinyl ester resins. Under the action of a free radical initiator, its alkenyl group can undergo copolymerization chemical bonding with the polymer, effectively solving the problems of easy migration and precipitation of traditional flame retardants. While imparting highly efficient phosphorus-nitrogen synergistic flame retardant properties (LOI > 30%, UL-94 V-0 rating) to the material, it maintains good mechanical properties and durability. This product is environmentally friendly and has broad application prospects.

This invention relates to the field of fiberglass technology, and in particular to an epoxy vinyl ester fiberglass wedge strip, its preparation method, and preparation system; the preparation steps include: S1, mixing 79.4-84.7 parts by weight of bisphenol A epoxy vinyl ester resin, 1.7-2.5 parts of release agent, 0.8-1.6 parts of accelerator, 2.4-4.1 parts of low-shrinkage agent, 8.2-11.8 parts of filler, and 1.7-2.4 parts of curing agent, stirring evenly, and then degassing to obtain a resin solution; S2, direct glass fiber yarn and bulked glass fiber yarn are drawn into a glue tank containing resin solution through a yarn separating plate for impregnation to obtain impregnated yarn; S3, the impregnated yarn is cured and shaped, and cut into wedge strips of a specific length to obtain epoxy vinyl ester fiberglass wedge strips; the design of the epoxy vinyl ester fiberglass wedge strip, its preparation method, and preparation system solves the technical problems of high density, low production efficiency, and high cost of existing epoxy vinyl ester fiberglass wedge strips.

This resin composition comprises: a vinyl ester resin (A) having an epoxy group and having an acid value of less than 1 KOHmg / g; at least one monomer (B) selected from radically polymerizable monomers and epoxy monomers; at least one component (C) selected from benzoic acid and benzoic acid derivatives; and a thickening component (D). In the resin composition, the content ratio of the component (C) to the component (D) ([at least one component selected from benzoic acid and benzoic acid derivatives] / [thickening component]) is more than 0.5 and 6.0 or less in terms of mass ratio.

This invention discloses a series of naringin ester derivatives, their enzyme-catalyzed preparation methods, and applications. Using naringin as a substrate, an immobilized lipase... IM Under TL catalysis, esterification with corresponding vinyl ester acyl donors is carried out in an organic solvent, followed by separation and purification after the reaction. This invention is the first to prepare a series of naringin ester derivatives with different chain lengths via enzymatic catalysis. This preparation method is mild, highly regioselective, has a high conversion rate (>99%), and is easy to scale up for production. Compared to naringin, the naringin ester derivatives exhibit better activity against *Porphyromonas gingivalis* (…). Porphyromonas gingivalis Bacterial gingival protein K (KGP) and its virulence factor exhibit significantly enhanced inhibitory activity, effectively disrupting bacterial cell membranes, inhibiting biofilm formation, and inducing bacterial apoptosis. They have broad application prospects in the preparation of oral care compositions or drugs for the prevention or treatment of periodontitis.

This utility model discloses a fiber-reinforced composite sewage pipe with an anti-corrosion layer, including a sewage pipe body made of polyethylene. The sewage pipe body is composed of an inner base layer and an outer base layer, with a reinforcing layer between the inner and outer base layers. An anti-corrosion layer is provided on the inner wall of the inner base layer, and an outer protective layer is provided on the outer wall of the outer base layer. The anti-corrosion layer made of vinyl ester resin can prevent corrosion of the inner wall of the sewage pipe body, avoiding erosion by acids, alkalis, microorganisms, and chemicals. The mesh reinforcing layer made of glass fiber can ensure the ring stiffness and axial tensile strength of the pipe. The outer protective layer, made of polyester resin and chopped fibers, can protect the pipe body from the influence of the external environment and effectively improve the mechanical properties and durability of the outer layer of the sewage pipe.

The utility model discloses a kind of corrosion resistance container for storing liquid, by vinyl ester resin mixed quartz sand integral casting, to improve the corrosion resistance of container, mechanical strength and durability. Container has the bottom wall of leveling bottom surface and the side wall extending around bottom wall, and the side wall is provided with inclined reinforcing rib to enhance rigidity. Bottom wall is provided with the foot embedded in, convenient transportation and hoisting. Side wall is divided into the first wall unit of length direction and the second wall unit of width direction, is provided with Chinese character or X-shaped reinforcing rib group, and is configured support rod to prevent deformation. Container is poured with opening downward. Especially suitable for electrolytic metallurgy system electrolyte storage, with excellent corrosion resistance and mechanical properties, significantly prolong service life, reduce manufacturing cost, with wide application prospect. The utility model solves the deficiency of existing storage container in corrosion resistance, mechanical strength and connecting fixed by optimizing material selection and structure design.

The application belongs to the technical field of FEVE fluorocarbon resin, and particularly relates to a FEVE fluorocarbon resin, a preparation method and application thereof. HFO-1234ze / HFO-1234yf is used as a hydrofluoroolefin gas phase monomer, a hydroxyl monomer is used as a crosslinking monomer, and a vinyl ester monomer and a vinyl ether monomer are used as a copolymerization monomer. Trifluorochloroethylene, tetrafluoroethylene and hexafluoropropylene are introduced into the copolymerization of the fluorine-containing gas phase monomer and the hydrofluoroolefin gas phase monomer. The low weather resistance defect of the FEVE fluorocarbon resin prepared by using a single hydrofluoroolefin is effectively improved. The aging resistance and long-term outdoor stability of the resin and the coating are significantly improved. The FEVE fluorocarbon resin can maintain excellent weather resistance for a long time and is not prone to color change, and is suitable for long-term outdoor coating application scenarios.

The application relates to the technical field of high polymer materials, in particular to a light-transmitting and heat-insulating water-based ink as well as a preparation method and application thereof. Steps: S1. Preparing a pre-dispersion liquid: mixing deionized water, an emulsifier, an initiator, a defoaming agent, zirconium acrylate and transparent near-infrared shielding nano-oxide to uniformly disperse, and preparing the pre-dispersion liquid; S2. Preparing a seed emulsion: mixing deionized water, an emulsifier, a pH buffer and at least one polymerization monomer selected from acrylic monomers, acrylate monomers, vinyl ester monomers and acid anhydride monomers to prepare the seed emulsion; S3. Under the protection of inert gas, the seed emulsion prepared in S2 is added into a reaction kettle and heated; then the pre-dispersion liquid prepared in S1 is added dropwise into the reaction system to perform emulsion polymerization reaction, and a hybrid emulsion is prepared; S4. Preparing a water-based ink, and the light-transmitting and heat-insulating water-based ink is prepared. The application has good dispersion stability and storage stability.

The present application relates to the technical field of high polymer materials, in particular to a thickening light-cured resin, a preparation method and application thereof, the preparation raw materials include, by weight fraction, phenolic aldehyde epoxy vinyl ester resin 60-80 parts, isocyanate 1-3 parts, acid anhydride 1-5 parts, polyhydric alcohol 2-8 parts, photoinitiator 0.2-2 parts, crosslinking monomer 10-30 parts, toughening agent 5-10 parts, and the Tg value of the phenolic aldehyde epoxy vinyl ester resin is 170-200 DEG C. The thickening light-cured resin provided by the present application has excellent wet heat resistance, can meet the long-term wet heat use conditions of the heat supply pipeline, the strength retention rate of the composite material made of the thickening light-cured resin and glass fiber cloth is more than 50% at 150 DEG C, and more reliable technical support is provided for the safe and stable operation of the heat supply system.

This invention relates to the field of waste acid concentration in titanium dioxide production, and discloses a material and method for repairing the impeller stub of a waste acid concentration circulating pump. The method includes: a first material for repairing corrosion pits in the steel layer of the impeller stub; and a second material for repairing the inner plastic lining of the impeller stub. The first material, by mass ratio, comprises 5.5-6.5 parts of 977-S high-temperature flux-resistant vinyl ester resin, 0.4-0.6 parts of curing agent, 0.4-0.6 parts of accelerator, and 2.5-3.5 parts of acid-resistant cast stone powder; the second material comprises 44-48 parts of 977-S high-temperature flux-resistant vinyl ester resin, 43-47 parts of curing agent, 3-5 parts of glass flakes, and 4-6 parts of accelerator. The material proposed in this invention does not require heating during repair, the stub lining can be repaired multiple times, the repair method is simple and environmentally friendly, quick, and produces high-quality repairs.

The present invention provides an alkali-developable resin composition that is low in volatility, excellent in dispersibility, photosensitivity, and developability, has excellent pencil hardness and heat resistance of the cured product, and produces a coating film that is good to the touch dry. The alkali-developable resin composition contains (A) an epoxy resin, (B) a carboxyl group-containing vinyl ester resin, (C) a photopolymerization initiator, (D) a photosensitive monomer, (E) an inorganic filler, (F) a high-boiling point solvent, and (G) a reactive diluent, wherein the (G) reactive diluent comprises at least one selected from a reactive diluent (G-1) with a viscosity of 2 mPa·s or more and 15 mPa·s or less, and a reactive diluent (G-2) with a viscosity greater than 15 mPa·s and 50 mPa·s or less, and the reactive diluent (G-1) with a viscosity of 2 mPa·s or more and 15 mPa·s or less, and the reactive diluent (G-2) with a viscosity greater than 15 mPa·s and 50 mPa·s or less, are epoxy compounds having only one epoxy group per molecule.

This invention provides a composite PVB film, its preparation method, and its applications. The composite PVB film comprises a PVB film layer and a vinyl ester resin layer, wherein the vinyl ester resin layer is laminated on at least one side of the PVB film layer, and the vinyl ester resin layer is formed by multiple vinyl ester resin strips, which are parallel and / or intersecting. This composite PVB film not only possesses excellent water resistance and optical properties, but also exhibits moderate adhesion to glass, thus improving the puncture resistance of laminated glass.