128results about "Lignin adhesives" patented technology

The invention discloses a lignin-inorganic oxide composite binder, preparation thereof and application of the lignin-inorganic oxide composite binder in a hard carbon negative electrode. The preparation method comprises the following steps: firstly, carrying out quaternization modification on lignosulfonate to obtain quaternized lignosulfonate, and then utilizing the action of quaternary ammonium and sulfonate of the quaternized lignosulfonate, hydroxyl and inorganic oxyacid radicals of inorganic nano oxide and carboxyl and hydroxyl of sodium carboxymethyl cellulose to prepare the modified lignosulfonate. The lignin-inorganic oxide composite binder with the interpenetrating network structure is formed. According to the binder, sodium carboxymethyl cellulose serves as a hard phase to enhance the mechanical rigidity, quaternized lignosulfonate rich in flexible long chains serves as a soft phase to bear part of loads, and inorganic nano oxide rich in hydroxyl serves as a crosslinking point or physical filler to enhance the structural stability of the binder. Besides, a multi-network structure formed by hydrogen bond crosslinking not only endows the binder with an excellent ion transmission rate, but also helps to enhance the interfacial compatibility of the binder with an ester electrolyte, thereby significantly improving the rate capability and cycle performance of the hard carbon negative electrode.

The invention relates to the field of adhesives, and discloses a dialdehyde lignin and dialdehyde protection lignin adhesive as well as a preparation method and application thereof. The method comprises the following steps: adding a dialdehyde solution and acid into the wood biomass and 1, 4-dioxane, and reacting at 75-95 DEG C for 3-7 hours; carrying out solid-liquid separation to obtain a liquid component, adjusting the pH value, and adding the liquid component into water; and carrying out solid-liquid separation to obtain a solid component, and cleaning and drying to obtain the dialdehyde lignin. The preparation method comprises the following steps: dissolving gelatin in an alkali solution, adding borate, nano-hydroxyapatite and dialdehyde lignin, and uniformly dispersing to obtain the dialdehyde protected lignin adhesive. The plywood prepared from the adhesive shows excellent mechanical properties, the wet strength of the plywood is larger than or equal to 1.0 MPa and the dry strength of the plywood is 2.2 MPa under the hot pressing condition of 120 DEG C, the flame retardant property, the heat stability and the moisture-proof stability of the plywood are remarkably improved, and the plywood further has the good mildew-proof characteristic.

The invention discloses a UV photocuring adhesive, a preparation method thereof and an application of the UV photocuring adhesive in the electronic field, and relates to the field of adhesives. The preparation method comprises the following steps: when the UV photocuring adhesive is prepared, carrying out a reaction on dihydroxyl modified 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, p-phenylene diisocyanate, polyethylene glycol and 2-ethyl-4-methylimidazole, so as to obtain imidazole-terminated isocyanate, and carrying out a reaction on the imidazole-terminated isocyanate and the 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, so as to obtain the UV photocuring adhesive. The modified lignin, butanediamine and N, N '-methylene bisacrylamide are subjected to a reaction, and a double-bond reactant is prepared; the preparation method comprises the following steps: reacting epoxy-terminated siloxane with octamethylcyclotetrasiloxane, tetramethyltetravinyl cyclotetrasiloxane and tetramethylammonium hydroxide to obtain modified siloxane, and finally, uniformly mixing imidazole-terminated isocyanate, a double-bond reactant, modified polysiloxane and benzoin butyl ether to obtain the polyurethane adhesive. The UV light-cured adhesive prepared by the invention has good adhesive property, anti-aging property and flame retardant property.

The invention relates to a Façade system for a building, in particular an External Thermal Insulation Composite System (ETICS), comprising a thermal and / or acoustic insulation, consisting of at least one insulation element being a bonded mineral fibre product made of mineral fibres, preferably stone wool fibres, and a cured aqueous binder composition, whereby the insulation element is fixed to an outer surface of the building by mechanical fastening elements and / or an adhesive, covered with a rendering, and whereby the aqueous binder composition prior to curing comprises a component (i) in form of one or more oxidized lignins, a component (iia) in form of one or more modifiers, and whereby the insulation element has a bulk density between 70 kg / m3 and 150 kg / m3.

The present invention relates to a method for preparing a bonding resin, in which lignin is provided in the form of an ammonia and / or organic base solution and mixed with one or more crosslinking agents and, optionally, one or more additives. The bonding resin is useful, for example, in the production of laminates, mineral wool insulation, and wood products such as plywood, oriented strand board (OSB), laminated veneer lumber (LVL), medium density fiberboard (MDF), high density fiberboard (HDF), parquet flooring, curved plywood, veneered particleboard, veneered MDF, or particleboard. The bonding resin is also useful, for example, in composites, molding compounds, and foundry applications.

The present invention relates to a method for preparing a thermosetting binder composition, comprising the following steps: - mixing at least one lignin, at least one organic monocarboxylic or sulfonic acid, and at least one organic non-polymeric polycarboxylic acid; and - heating said mixture at a temperature of between 90°C and 170°C, preferably between 110°C and 150°C, for a duration of between 5 seconds and 5 minutes, preferably between 15 seconds and 1 minute, so as to form at least one water-soluble or water-dispersible lignin ester. The present invention also relates to a thermosetting binder composition that can be obtained by such a method, said binder composition containing at least one water-soluble or water-dispersible lignin ester, at least one residual lignin, at least one free residual organic non-polymeric polycarboxylic acid, and at least one free residual organic monocarboxylic or sulfonic acid. The present invention also relates to a method for manufacturing an insulation product comprising mineral fibres or natural organic fibres using a thermosetting binder composition as obtained previously, but diluted in water, and to an insulation product that can be obtained by the above-mentioned manufacturing method.

The disclosure relates to a roofing system for a flat roof or a flat inclined roof of a building with a thermal and / or acoustic insulation, consisting of a structural support, a deck, optionally a vapour control layer, a waterproof membrane and at least one insulation element being a bonded mineral fibre product made of mineral fibres, preferably stone wool fibres, and a cured aqueous binder, whereby the cured aqueous binder prior to curing comprises a component (i) in form of one or more oxidized lignins, a component (ii) in form of one or more cross-linkers, a component (iii) in form of one or more plasticizers, and whereby the insulation element has a bulk density between 70 kg / m3 and 250 kg / m3.

The present invention relates to an improved process for preparing an aqueous dispersion of lignin and the use of said suspension in the preparation of a resin.

The invention relates to the technical field of lithium batteries, in particular to a composite aqueous binder and application thereof to a lithium-rich manganese-based material. The preparation method of the composite aqueous binder comprises the following steps: S1-1, mixing and stirring a carboxymethyl chitosan solution and polyvinylidene fluoride to obtain a PC solution; s1-2, humic acid is added into the PC solution, deionized water is added for dilution until the solid content is 4-6 wt%, and the composite water-based binder is obtained. The composite aqueous binder and the lithium-rich manganese-based material are jointly used for preparing the positive electrode slurry. And the preparation of the positive electrode slurry comprises the following steps: S2-1, mixing and stirring the lithium-rich manganese-based material, the conductive agent and the composite aqueous binder, adding N-methyl pyrrolidone, and grinding to obtain the positive electrode slurry.

There is provided a release agent composition containing an aqueous solvent, that is, a release agent composition for forming a release agent layer that can be released by light irradiation and is used for a laminate, in the laminate in which a support substrate and a semiconductor substrate or an electronic device layer can be firmly adhered to each other during processing of the semiconductor substrate or the electronic device layer, and the support substrate and the semiconductor substrate or the electronic device layer can be easily separated from each other by light irradiation after the substrate processing. There is provided a release agent composition for light irradiation release for forming a release agent layer of a laminate which includes a semiconductor substrate or an electronic device layer, a light-transmissive support substrate, and a release agent layer provided between the semiconductor substrate or the electronic device layer and the support substrate, in which the electronic device layer includes a plurality of semiconductor chip substrates and a sealing resin disposed between the semiconductor chip substrates, and which is used for releasing the semiconductor substrate or the electronic device layer from the support substrate after the release agent layer absorbs light irradiated from the support substrate side, in which the release agent composition contains a light-absorbing compound that contributes to making the semiconductor substrate or the electronic device layer and the support substrate easily released by absorbing the light, and a solvent, and the solvent contains water.

The invention discloses a preparation method of a lignin biomass adhesive, the lignin biomass adhesive and plywood. The preparation method comprises a lignin activating treatment step and a mixing step. The lignin activating treatment step comprises the step of mixing water, sodium hydroxide, polyacrylamide and lignin and activating to obtain an activating solution. In the mixing step, the activating solution and the phenolic resin glue are uniformly mixed, the lignin biomass adhesive is obtained, and the adding amount of the activating solution is smaller than or equal to 60% of the weight of the phenolic resin glue. According to the preparation method of the lignin biomass adhesive, the prepared lignin biomass adhesive is high in environmental protection property, can reach performance indexes of first-class plywood, and is low in cost.

The invention discloses a preparation method of a bio-based binder based on a lithium-sulfur battery in the technical field of lithium-sulfur batteries, which comprises the following steps: S1, selecting a natural polymer material as a matrix material, purifying the selected matrix material, and modifying according to actual requirements; s2, uniformly mixing the modified matrix material with a reinforcing component; s3, adding a cross-linking agent into the mixed system to carry out a cross-linking reaction; s4, water and a low-toxicity organic solvent are adopted as dispersion media, the mixed system is dispersed in a selected solvent, and uniform slurry is formed; and S5, coating the prepared binder slurry on an electrode current collector of a lithium-sulfur battery, and then carrying out drying treatment to obtain the bio-based binder. According to the invention, a natural high polymer material is adopted as a matrix, so that the dependence on petroleum-based raw materials is reduced, the environmental pollution in the production process is reduced, and the concepts of green chemistry and sustainable development are met.

The invention discloses a method for preparing a reinforced composite wood floor by adopting a low-formaldehyde adhesive. The method comprises the following steps: mixing urea-formaldehyde resin, lignin, chitosan and soybean protein isolate to prepare a bio-based multi-component composite adhesive; mixing the adhesive with wood fibers and bamboo fibers, and adding a microencapsulated phase change material to prepare a base material blank; carrying out sectional type hot press molding on the base material blank; coating the surface of the base material with a photocatalytic formaldehyde capturing primer; preparing a multifunctional wear-resistant layer containing self-repairing microcapsules, a super-hydrophobic nano material and a negative ion release material; and carrying out secondary hot-pressing compounding on the functional base material, the decorative paper and the wear-resistant layer. The reinforced composite wood floor prepared by the invention has multiple functions of low formaldehyde emission, good temperature regulation function, surface self-repairing, antifouling and self-cleaning, air purification and the like, and meets the requirements of healthy, comfortable and intelligent home environment.

The present invention relates to a method for producing a binder composition without using a compound selected from the class of phenols, the method comprising the steps of (i) heating an aqueous composition comprising lignin in the presence of a catalyst, (ii) mixing a crosslinker with the aqueous composition from (i) and heating it at a temperature between 60 and 95°C to prepolymerize the lignin and the crosslinker, and (iii) mixing a tannin with the aqueous composition from (ii) and polymerizing the tannin with the prepolymerized lignin and the crosslinker until a binder composition having a predetermined viscosity value is formed, the molar ratio of the crosslinker to the lignin and the tannin being between 0.5 and 1.7.

The present invention is directed to a process for preparing a binder, wherein semi-washed lignin is mixed with a cross-linker and heated. The invention is also directed a binder obtained according to the process and to the use thereof.

The invention relates to an aqueous binder composition free of phenol and formaldehyde.

The present application relates to the technical field of adhesives, and particularly relates to a lignin-based adhesive material, a preparation method thereof, an adhesive and a glued product. The present application uses a natural small-molecule aldehyde-based deep eutectic solvent as a solvent and an aldehyde donor at the same time, can react with lignin to obtain a lignin-based adhesive material, uses lignin to replace phenol, uses a food-grade non-toxic and harmless natural hydroxyl aromatic aldehyde to replace formaldehyde, the obtained lignin-based adhesive material can be directly used as an adhesive, and has strong bonding performance and bending strength. The lignin and the natural small-molecule hydroxyl aromatic aldehyde in the deep eutectic solvent in the present application can be derived from biomass raw materials, are low in cost, simple to obtain, avoid the introduction of phenol and formaldehyde and other substances, and the product is more green and environmentally friendly. The glued product prepared from the lignin-based adhesive material in the present application has excellent water resistance and mildew resistance, is green and environmentally friendly, has stronger performance, and is lower in cost.

The present invention relates to a bonding resin useful for example in the manufacture of insulation, such as mineral wool insulation or glass wool insulation. The invention also relates to a method for preparing the bonding resin and to the use thereof.

The present invention relates to lignin fragments A comprising at least monomer units (I) and (II) wherein R1 is selected from the group consisting of methyl, ethyl, propyl, isopropyl and n-butyl, and wherein the lignin fragments A have an average aliphatic hydroxyl group content of more than 3 mmol / g.

The invention relates to an aqueous binder composition free of phenol and formaldehyde.

The present invention provides a lignin-based formaldehyde-free adhesive and a preparation method thereof. In the present invention, a turbid liquid is obtained by acid precipitation of black liquor, and the lignin concentrate obtained by centrifuging the turbid liquid can be directly used for synthesizing the formaldehyde-free adhesive without undergoing treatments such as spray drying or freeze drying, reducing the preparation cost; adding a diluent and a curing agent to the lignin concentrate can directly obtain the formaldehyde-free adhesive without modifying the lignin or synthesizing resins such as phenolic resin and urea-formaldehyde resin to obtain the adhesive, with a simple synthesis process and a simple structure, being suitable for large-scale production; for the adhesive of the present invention, the preparation raw materials do not contain formaldehyde or formaldehyde derivatives, and the adhesive obtained by this method has no risk of formaldehyde release, conforming to the concept of green chemistry; the adhesive obtained by this method has a stronger bonding strength and better performance compared with the adhesive synthesized from lignin resin.

A blended furnish with improved performance characteristics while reducing environmental impact, when applied to a substrate is provided. The methods of making and using blended furnish are provided. A blended furnish includes a urea-formaldehyde (UF) resin or a melamine-urea-formaldehyde (MUF) resin, a lignosulfonate or a kraft lignin, an alkaline compound, optionally an additive, and a plurality of substrates. A composite product using a blended furnish is also provided.

A method for producing an adhesive composition is disclosed. The present invention relates to a process for the preparation of an adhesive composition comprising: i) polymerizing a cross-linking agent and a polymerizable substance by mixing them in an aqueous composition and heating them at a temperature of 60-95 DEG C to prepare a pre-composition wherein at least 30 wt% of the polymerizable substance is derived from lignin, and ii) mixing the pre-composition with a silane wherein based on the total dry weight of the adhesive composition, at least 30 wt% of the polymerizable substance is derived from lignin, the silane is used in an amount of 0.1-0.9% by weight, thereby forming an adhesive composition having a free formaldehyde content of at most 0.5%.

The present invention relates to a production process for ENF-grade impregnated film paper facing plywood, which includes the synthesis of a low-melting ionic liquid, purification of lignin, catalytic degradation and purification of lignin using the low-melting ionic liquid, preparation of a MUF co-condensation resin, preparation of a lignin-based adhesive, preparation of dopa-methacrylamide (DMA), preparation of a CNF / P (HEMA-co-DMA) adhesive, and preparation of an antibacterial and mildew-proof agent-impregnated film paper facing plywood. The present invention innovatively combines catalytic degradation activation technology, a free radical polymerization method, and an alkaline catalysis method to prepare a material having the advantages of good mechanical and water resistance, high bonding strength, and lower formaldehyde emission.

The present invention discloses a formaldehyde-free adhesive and its preparation method and application, belonging to the technical field of adhesive preparation. Calculated by weight parts, the formaldehyde-free adhesive is prepared from the following raw materials: 80 to 150 parts of modified lignin solution, 10 to 30 parts of polyurethane emulsion, 15 to 35 parts of curing agent, 6 to 12 parts of modified filler, and 5 to 15 parts of flame retardant. The formaldehyde-free adhesive provided by the present invention is formaldehyde-free and has high environmental protection performance; it has certain flame retardancy and excellent mechanical properties, and has good comprehensive performance. It is suitable for the preparation process of artificial boards and has certain application prospects.