5085 results about "Oligomer" patented technology

Oligomers that contain an ethylenically unsaturated group, a silane group, and an aspartate group and / or hydantoin group are described. Also disclosed are methods for producing and using such compounds, such as their use in coating compositions, such as coating compositions suitable for application to optical glass fiber substrates.

This disclosure relates to dimeric immunotherapeutics that comprise two IgGs that are crosslinked with a disulfide bond. The two IgGs may be chimeras of two different heavy chains, in which one heavy chain includes a cysteine mutation that forms the disulfide bond, and the other heavy chain lacks the cysteine mutation. The presence of a cysteine mutation in only one of the heavy chains of an IgG avoids two disulfide bonds between the two IgGs, which increases the accessible orientations between the two crosslinked IgGs, and also avoids the formation of trimers and higher-order oligomers.

To sufficiently enhance the curability of an active energy ray-curable ink composition for inkjet printing, which contains (2,4,6-trimethylbenzoyl)bis(p-tolyl)phosphine oxide as a photopolymerization initiator, and preferably to improve the solvent resistance of a cured product. [Solution] An active energy ray curable ink composition for inkjet printing, which has a viscosity of 5 cps or more and 80 cps or less at room temperature, comprises: 10% by mass or more of a monofunctional monomer, 1 to 15% by mass of an amine-modified oligomer, and (2,4,6-trimethylbenzoyl)bis(p-tolyl)phosphine oxide, based on the ink composition; and when the ink composition further contains a black pigment, the ink composition contains a sensitizer.

The invention relates to the technical field of high polymer materials, and particularly provides a self-repairing type UV curing alumite color layer coating and a preparation method thereof. The water-based ink is prepared from, by weight, 30-50 parts of polyurethane acrylic resin, 10-25 parts of modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts of photoinitiator, 3-8 parts of hydrophobic modified nano filler and 1-3 parts of cross-linking agent, and the dynamic covalent bonds are selected from at least one of hydrazide bonds, boric acid ester bonds and Diels-Alder bonds. By introducing a gradient energy collaborative network of dynamic covalent bonds and quadruple hydrogen bonds, rapid self-repairing of the coating at normal temperature and thermal triggering recombination of deep damage are achieved, and meanwhile through the micro-phase separation design of the hydrophobic core-shell filler and the graft modified silicon carbide nanowires, the hydrolysis resistance is improved.

The invention relates to the technical field of flexible display devices, in particular to a high-impact-resistance coating for ultra-thin glass, a preparation method and an assembly layer. The invention discloses a high-impact-resistance coating for ultra-thin glass. The high-impact-resistance coating is mainly prepared from a precursor, a cross-linking agent and a photoinitiator in a solvent-free condition in a UV curing manner, the precursor comprises a polyether urethane acrylate oligomer with Tg of-70 DEG C to-40 DEG C; the Tg of the coating is 30-60 DEG C; and in a temperature scanning test with the temperature range of-40 to 80 DEG C and the frequency of 1Hz, the peak value of the loss factor of the coating is 0.7 to 1.2. The high-impact-resistance coating provided by the invention has good adhesion and excellent optical performance, also has good elongation at break and good flexibility, has a high dissipation effect on mechanical stress, and can enhance the impact resistance of the ultra-thin glass. In addition, the high-impact-resistance coating is prepared through a UV photocuring method and does not contain a solvent, the VOC emission in the production and preparation process is low, and the coating is green and efficient.

The invention relates to bionic matrix hydrogel for constructing bone organs and a preparation method of the bionic matrix hydrogel. The bionic matrix hydrogel is prepared from a bone acellular extracellular matrix, a salmon DNA (Deoxyribose Nucleic Acid) network and a calcium phosphate oligomer under the combination of photo-crosslinking and self-assembly physical crosslinking. The acellular extracellular matrix in the bionic matrix hydrogel can simulate organic components in natural bones, the calcium phosphate oligomer can simulate inorganic components in the natural bones, and sufficient phosphate ions can be provided for biomineralization due to introduction of a DNA network. The biomimetic matrix hydrogel can replace Matrigel to act in bone organoid culture, provide a living environment similar to bone tissue for three-dimensional culture cells, enhance substance exchange and signal transduction between cells, promote proliferation, adhesion and osteogenic differentiation of bone marrow mesenchymal stem cells, and further accelerate the process of biomineralization. The invention provides an optional new material for preparing the functional bone organ.

The invention provides a waterborne polyurethane enhancer, a cold-resistant and salt-resistant concrete composition as well as a preparation method and application of the cold-resistant and salt-resistant concrete composition, and belongs to the technical field of buildings and civil engineering. The waterborne polyurethane enhancer comprises diisocyanate, oligomer polyol, a small molecule chain extender, oxalic acid dihydrazide, oxaloacetic acid and a catalyst, and the cold-resistant and salt-resistant concrete composition comprises cement, aggregate, a water reducing agent, an anti-freezing agent, an air entraining agent, modified straw fibers, the waterborne polyurethane enhancer, calcium silicate and water. Through mutual cooperation of all the components, the obtained concrete has excellent cold resistance, salt resistance, impermeability and compressive strength, and can meet the engineering requirements for concrete durability and use safety under low-temperature and high-salt conditions.

The invention discloses a dual-curing 3D printing resin, the dual-curing 3D printing resin comprises an acrylate oligomer containing a dynamic covalent bond and a blocked isocyanate cross-linking agent, and the acrylate oligomer containing the dynamic covalent bond is obtained by reacting an isocyanate-terminated oligomer with acetoacetic acid ethylene glycol methacrylate. The internal molecular structure and the crosslinking density of the dual-curing 3D printing resin can be changed through heat treatment after light curing, and the dual-curing 3D printing resin has excellent stability and can be stored and used in a single-component mode.

The invention discloses low-migration UV ink-jet ink and a preparation method thereof, and belongs to the technical field of novel ink. Comprising the following components in parts by mass: 10-15 parts of a dynamic cross-linked polyurethane acrylate oligomer, 5-8 parts of an epoxy silicone resin oligomer, 2-3 parts of modified silicon dioxide, 4-5 parts of a photoinitiator, 15-20 parts of sorbic acid modified color paste, 1-2 parts of nano cerium oxide and 0.5-1 part of an antioxidant. The molecular chain of the dynamic cross-linked polyurethane acrylate oligomer prepared by the invention contains an active group capable of forming a cross-linked structure and a dynamic covalent bond. The groups and bonds promote molecular chain crosslinking when the ink is cured, a three-dimensional network is formed, and the molecular crosslinking density is improved. Through interaction of palmitic acid modified silicon dioxide and oligomer, the palmitic acid modified silicon dioxide is uniformly dispersed in a matrix and interferes molecular chain movement during curing, so that the crosslinking density is further improved, an ink film layer is more compact and firmer, the wear resistance and the scratch resistance are improved, and the tinting strength and the stability are indirectly enhanced.

The invention discloses feruloyl esterase fermentation preparation and application of feruloyl esterase in polyester plastic degradation, and belongs to the field of environmental science. According to the method, feruloyl esterase FAE4 derived from Anerocephalum thermophilum is prepared through fermentation, and is compounded with polyester degrading enzymes which are different in source and are used for degrading polyester plastic oligomers, so that a compound reaction system which remarkably improves the degradation efficiency of poly (butylene adipate-co-terephthalate) or poly (butylene adipate-co-terephthalate) (PBAT) and the content proportion of a final product is obtained; good industrial prospects are realized.

The invention discloses a rational copolymerization strategy for improving the stability of an oligomeric structure of acid-induced high-order oligomeric decarboxylase AdiA in a neutral to alkaline environment and application of the rational copolymerization strategy, and belongs to the field of bioengineering. According to the strategy, rational charge overturning transformation is carried out on a pentamer radial oligomeric interface and a dimer weft-wise oligomeric interface at the same time, and stable assembly and efficient catalysis of a decamer under the condition that the pH value is from 7.0 to 9.0 from neutral to alkaline are achieved. Wherein positive charges are introduced into a meridian interface to weaken electrostatic repulsion, and negative charges are introduced into a latitudinal interface to enhance dimer compactness and substrate transfer efficiency. The specific enzyme activity of the representative double mutant AdiAD471K / E467K / H736E is 45.5 times that of a wild type when the pH value is 8.0, and the representative double mutant AdiAD471K / E467K / H736E keeps a complete decamer state when the pH value is 7.0-9.0. The yield of butanediamine is up to 156.5 g / L by using the mutant to catalyze whole cells.

The invention provides a method for reducing polymer adhesion in ethylene oligomerization. According to the method, a double-kettle series polymerization process is adopted, a phosphine-nitrogen ligand, a chromium metal compound and a cocatalyst are added into a first reaction kettle, a nucleating agent is added into a second reaction kettle, the reaction is carried out in the first reaction kettle in the early stage and transferred to the second reaction kettle in the later stage for continuous reaction, oligomer is converted into high polymer through the nucleating agent, and the high polymer is stored in a particle form; therefore, the phenomenon that the oligomer winds the stirring paddle is reduced or avoided, the aggregation of the polymer in the reaction kettle is greatly reduced, and the operation time of the device is prolonged. The catalytic system can catalyze the ethylene oligomerization reaction with high activity, the catalytic activity reaches up to 10 * 10 < 6 > g product / (molCr.h), the overall selectivity of 1-hexene and 1-octene with high added values can reach 90% or above, and the phenomenon that a polymer is hung on a stirring paddle is greatly reduced.

Systems and methods for processing a mixed plastic waste feed to produce a hydrogen-rich hydrocarbon product, such as synthetic crude oil or pyrolysis oil, by processing the mixed plastic waste feed through two cracking units. The first cracking unit is operated at a temperature and a residence time sufficient to at least partially depolymerize the plastic polymers in the mixed plastic waste feed to produce a molten oligomers product stream also containing inorganic components from the mixed plastic waste feed and a gas stream. This molten oligomers product stream is further processed in a thermal or a catalytic cracking unit to produce a hydrocarbonaceous stream that is processed to produce the hydrogen-rich hydrocarbon product, such as a synthetic crude oil that can be processed in a refinery or a pyrolysis oil that can be fed to a steam cracker.

The invention discloses a high-refractive-index nano-composite optical adhesive and a preparation method thereof, and belongs to the technical field of optical transparent adhesives. The optical adhesive is prepared by taking a polyurethane acrylate oligomer with a specific structure as matrix resin, introducing surface-modified barium titanate and zirconium oxide core-shell nanoparticles as a functional filler, and matching with an active diluent, a photoinitiator and a silane coupling agent in a specific proportion. Through the design of the core-shell structure, the core problems that the high-refractive-index nanoparticles are easy to agglomerate in an organic resin matrix, the dispersion stability is poor and the bonding force with a matrix interface is weak are effectively solved. The prepared optical adhesive has a refractive index of more than 1.65, a light transmittance of more than 99% and a haze of less than 0.3% after being cured, has excellent bonding strength, weather resistance and long-term use stability, and is especially suitable for precise lamination of high-end display devices (such as OLEDs (Organic Light Emitting Diodes) and micro-lens arrays).

The invention discloses a lignin reversible cross-linked PE (polyethylene) plastic as well as a preparation method and application thereof, and relates to the field of modified plastics. The lignin reversible cross-linked PE plastic is prepared from the following components in parts by mass: 8 to 12 parts of maleimide functionalized lignin, 2.5 to 15 parts of furan functionalized maleic anhydride grafted polyethylene oligomer and 100 parts of polyethylene. Wherein the maleimide functionalized lignin is obtained through a reaction of alkali lignin and a maleimide compound containing a siloxane group; the furan functionalized maleic anhydride grafted polyethylene oligomer is obtained by reacting a maleic anhydride grafted polyethylene polymer with a furan derivative containing amino groups. By modifying the lignin and introducing a DA bond, the compatibility of the lignin and polyethylene is increased, and reversible crosslinking of the PE plastic is realized, so that the PE plastic has good mechanical properties, ultraviolet resistance and repeatable processability.

The invention relates to a heat-resistant, water-resistant and flame-retardant backboard composite material as well as a preparation method and application thereof. The heat-resistant, water-resistant and flame-retardant backboard composite material comprises a phosphorus-containing epoxy acrylate oligomer, common epoxy resin, toughened epoxy resin, phosphorus-containing epoxy resin, a filler, an additive flame retardant, a dicyandiamide curing agent, an accelerant, nitrogen-containing phenolic resin, a latent curing agent, a UV absorbent and an antioxidant. The phosphorus content in the material is improved by synthesizing the phosphorus-containing epoxy acrylate oligomer, so that the flame retardant property of the product is improved, and the problem of low flame retardant efficiency caused by direct addition of a phosphorus flame retardant is solved.

The invention discloses a method for catalytically synthesizing lactide by using a kaolin-based catalyst, which comprises the following steps: (1) preparing oligomeric lactic acid: carrying out lactic acid dehydration polymerization reaction by using L-lactic acid or D-lactic acid or DL-lactic acid as a raw material to obtain oligomeric lactic acid of which the weight-average molecular mass of an oligomer is 1000-3000Da; and (2) depolymerizing the oligomeric lactic acid: carrying out depolymerization reaction on the oligomeric lactic acid obtained in the step (1) under the action of a kaolin-based catalyst to obtain crude lactide. The raw materials of the catalyst are easy to obtain, the cost is low, the regeneration process is simple, the reaction temperature of depolymerization cyclization is low, the reaction time is short, and the cost can be greatly reduced in industrial production.

The invention relates to composite resin for packaging a Topcon component as well as a preparation method and application of the composite resin. Comprising an acrylate monomer, an aliphatic polyurethane acrylate oligomer, hydroxyl acrylate, bisphenol A acrylate, maleic anhydride modified epoxy acrylate, a light curing agent, a latent curing agent, a flame retardant A, a flame retardant B, a thixotropic agent, an anti-aging agent, a UV absorbent and a light stabilizer. The composite resin has the comprehensive performance of high viscosity, low shrinkage, super weather resistance and flame retardance, the aluminum-containing backboard prepared from the composite resin is high in water resistance and super weather resistance, due to the fact that light-heat double-stage curing is adopted for curing, the resin collapses and is cured to generate a solid phase, and in the follow-up aluminum foil hot-pressing curing process, the solid phase is solidified to form a solid phase; the resin is further infiltrated and cured, the porosity of the resin can be greatly reduced through a dual-curing system, water cannot enter the interior in the long-term use process, and voltage breakdown reduction of the aluminum-containing back plate under the long-term damp and hot condition is completely eradicated.

The invention provides a preparation method of an anti-blow-off porous carbon material for a silicon-carbon negative electrode, which comprises the following steps: (S1) preparing a solvent, an emulsifier and a nucleating agent into a mixed solution, adding a resin oligomer and a curing agent, polymerizing into spherical resin under the condition of stirring at 40-80 DEG C, and drying and agglomerating into blocks; the emulsifier comprises a micromolecule anionic surfactant and a polymer emulsifier; (S2) crushing and screening to obtain spherical agglomerates with proper particle sizes, and pyrolyzing and carbonizing the spherical agglomerates in an inert atmosphere to obtain pyrolytic carbon; (S3) performing activated pore-forming on the pyrolytic carbon in an activated atmosphere to obtain an activated carbon aggregate; and (S4) depolymerizing and separating the activated carbon aggregate to obtain the porous carbon material. According to the invention, the spherical particles are greatly agglomerated, the pain point of gas blow-off in the industrial activation process is solved, the activation yield is improved, and meanwhile, the mechanical properties of the material can be adjusted by controlling the crosslinking degree.

The invention belongs to the technical field of coatings, and discloses an anti-sinking water-based acrylic resin coating and a preparation method thereof.The anti-sinking water-based acrylic resin coating is prepared from, by weight, 110-130 parts of modified water-based acrylic resin, 10-25 parts of modified cellulose nanocrystals, 3-5 parts of a composite additive, 4-6 parts of a dispersing agent, 0.5-2 parts of a defoaming agent, 0.5-2 parts of a flatting agent and 10-20 parts of water; the acrylic resin is modified by using the organic silicon oligomer and the epoxy resin, the film hardness is high, the adhesive force is strong, and the film hardness, the impact resistance, the ultraviolet aging resistance and the flame retardant property of the material are improved by adding the modified cellulose nanocrystals and the composite additive.

The invention relates to the technical field of high polymer materials, in particular to a block copolymerization modified para-aramid polymerization solution and a preparation method and application thereof.The preparation method comprises the steps that in the inert gas atmosphere, hydrotropy salt is dissolved in an organic solvent to obtain the polymerization solution; adding a third monomer and terephthaloyl chloride into the polymerization solution, and controlling the reaction temperature to carry out pre-polycondensation reaction to obtain an amino-terminated oligomer system; adding p-phenylenediamine and paraphthaloyl chloride into the oligomer system, and controlling the stirring reaction temperature to carry out block copolymerization reaction under the stirring condition; and after the block copolymerization reaction is finished, adding a neutralizer to neutralize acidic substances generated in the reaction process, and finally obtaining the modified para-aramid polymer liquid in the neutral environment. The polymer liquid is applied to the field of lithium battery diaphragms, and the modified aramid fiber coated diaphragm which is excellent in thermal shrinkage performance, high in diaphragm rupture temperature, porous in structure and high in puncture resistance is obtained.

The invention relates to the technical field of pouring sealant coatings, in particular to a two-component polyurethane circuit board pouring sealant and a preparation method thereof. Comprising a component A and a component B. The component A comprises liquefied MDI, a phosphate flame retardant and a plasticizer. The component B comprises a hydroxyl acrylate oligomer, bio-based polyol, a defoaming agent and a catalyst, the viscosity of the hydroxyl acrylate oligomer at the temperature of 25 DEG C is 8000-15000 mPa.s, and the hydroxyl value of the hydroxyl acrylate oligomer is 100-150 mgKOH / g. The viscosity of the hydroxyl acrylate oligomer at 25 DEG C is limited to be 8000-12000 mPa.s, and the hydroxyl value is 100-140 mgKOH / g, so that the mechanical properties and aging resistance of the pouring sealant can be improved at the same time.

The invention relates to a self-repairing polyurethane microcapsule as well as a preparation method and application thereof, and relates to the technical field of new materials. The microcapsule is mainly prepared from the following raw materials in parts by weight: 10 to 50 parts of polyisocyanate, 40 to 60 parts of oligomer polyol, 50 to 70 parts of a surfactant, 10 to 40 parts of a core material, 1 to 10 parts of a disulfide compound and 30 to 50 parts of a solvent. The self-repairing polyurethane microcapsule can recover the shape before damage under a heating condition, so that a wound is closed autonomously, and self-adaptive repairing of the damage is facilitated.

The invention provides a preparation method of a triazine / heptazine homojunction structure carbon-doped carbon nitride photocatalyst, which comprises the following specific steps: (1) placing mixed powder of melamine and 2, 4, 6-triaminopyrimidine in air, heating to 300-500 DEG C, and calcining for 2-6 hours to form a mixture of carbon-doped melamine and oligomer thereof; (2) placing the mixture obtained in the step (1) in water at 60-70 DEG C, performing ultrasonic dispersion, then slowly cooling to room temperature, oscillating for 12-36 hours, removing moisture through rotary evaporation, and further drying to obtain a solid supramolecular precursor; and (3) fully mixing the solid supramolecular precursor obtained in the step (2) with molten salt, calcining at 500-600 DEG C for 2-6 hours, cooling, fully washing with deionized water, removing mixed salt, separating solid residues, and drying to obtain the triazine / heptazine homojunction structure carbon-doped carbon nitride photocatalyst THCNx-t. The prepared carbon-doped carbon nitride photocatalyst is uniform in homojunction distribution, and has the characteristics of excellent photochemical properties, high photon-generated carrier separation efficiency and excellent photocatalytic benzyl alcohol selective oxidation performance.

The invention provides a high-hydrophobicity anti-pollution flashover coating and a preparation method thereof, and relates to the field of coatings. The silicone rubber composition is prepared from the following raw materials in parts by weight: 80 to 100 parts of hydroxyl-terminated polydimethylsiloxane; 5 to 15 parts of modified nano silicon dioxide; 10 to 30 parts of a composite self-repairing microcapsule; 10 to 25 parts of a flame retardant; 3-8 parts of a cross-linking agent; 0.5-2 parts of a catalyst; 1-5 parts of an accelerant; 40 to 100 parts of a solvent; the modified nano silicon dioxide is fumed silica subjected to surface treatment by a fluorine-containing silane coupling agent and a platinum catalyst; the capsule wall of the composite self-repairing microcapsule is a polylactic acid-glycolic acid copolymer, and the capsule core of the composite self-repairing microcapsule is a mixed solution of a hydroxyl-terminated polydimethylsiloxane oligomer and methyltris (methylethylketoximino) silane. The coating has excellent hydrophobicity, weather resistance and targeted repair function.

The present invention relates to a method for recycling polyamide, the method comprising: (i) subjecting the polyamide to acid hydrolysis in an aqueous liquid to produce oligomers of the polyamide that are soluble in the aqueous liquid; and (ii) using an amidase to convert the oligomers into their monomeric constituent component(s).

Printable resin precursor compositions and polishing articles including printable resin precursors are provided. Printable resin precursors include a curable precursor formulation having a viscosity of less than or about 15 cP at 70° which include at least one urethane acrylate oligomer, at least one reactive monomer, and a photoinitiator. The curable precursor formulation exhibits an ultimate tensile strength measured in mPa and an elongation at break (%), where a product of the ultimate tensile strength and the elongation at break is greater than or about 2,000.

The invention discloses a self-adaptive light-dimming temperature-control polyurethane protective film and a preparation method thereof, and relates to the technical field of high polymer materials. When the self-adaptive light-dimming temperature-control polyurethane protective film is prepared, castor oil reacts with sulfhydrylated thiosemicarbazone to prepare modified castor oil; the preparation method comprises the following steps: carrying out ring opening polymerization on flame-retardant cyclotetrasiloxane and tetramethyl cyclotetrasiloxane to prepare a siloxane oligomer; enabling vanadium pentoxide, oxalic acid and tungstic acid to react to prepare tungsten-doped vanadium dioxide; the preparation method comprises the following steps: carrying out a reaction on tungsten-doped vanadium dioxide and allyltriethoxysilane to prepare modified vanadium dioxide; uniformly mixing castor oil, modified castor oil, siloxane oligomer, isophorone diisocyanate and copper chloride, pouring the mixture into a mold, and performing curing molding, so as to obtain the self-adaptive light-dimming temperature-control polyurethane protective film. The self-adaptive light-dimming temperature-control polyurethane protective film prepared by the invention has excellent flame retardance, tensile strength and self-adaptive light-dimming temperature-control performance.

The invention discloses a magnetic hydrogel, a surface modified Ti implant with an anisotropic magnetic hydrogel coating and application of the surface modified Ti implant. Fe3O4 nano-particles are uniformly deposited on carboxylated cellulose nano-fibers and are modified with polydopamine, and the magnetic cellulose nano-particles with high biocompatibility and superparamagnetism are prepared; the particles can sensitively respond to a weak magnetic field; the preparation method comprises the following steps: preparing a polydopamine modified Ti material, doping the polydopamine modified Ti material and a calcium phosphate oligomer into a GelMA hydrogel solution, coating the polydopamine modified Ti material with the solution, forming an anisotropic structure in a magnetic field, and carrying out photo-crosslinking to finally obtain the surface modified Ti implant with an anisotropic magnetic hydrogel coating. The magnetic hydrogel coating has an anisotropic structure and mechanical properties, and can simulate the anisotropy of bones to a certain extent.

The invention belongs to the technical field of analysis and detection, and discloses a method for detecting perfluorinated and polyfluoroalkyl substances in cosmetics, which comprises the following steps: (1) mixing a perfluorinated and polyfluoroalkyl substance standard solution and an isotope internal standard solution to obtain a mixed standard solution; detecting the mixed standard solution by adopting a liquid chromatograph-mass spectrometer, drawing a standard curve, and calculating to obtain a linear equation; (2) mixing a cosmetic sample with the isotope internal standard solution, adding an extracting solution, extracting, and filtering to obtain a mixed solution to be detected; detecting the mixed to-be-detected solution by adopting the liquid chromatograph-mass spectrometer to obtain a detection result, and substituting the detection result into the linear equation to obtain the content of the perfluoro and polyfluoroalkyl substances in the mixed to-be-detected solution, the perfluoro and polyfluoroalkyl substances comprise perfluorocarboxylic acid, perfluorosulfonic acid, a fluorine polymer, perfluoroalkyl ether sulfonic acid, saturated fluorine telomere acid and perfluoroether carboxylic acid.