10 results about "Glyoxal" patented technology

This invention provides an antistatic and privacy-protecting polarizing film and its preparation process, belonging to the field of polarizing film preparation technology. The preparation process includes the following steps: preparation of an antistatic agent; preparation of a modified adhesive; preparation of a composite polarizing film; and preparation of the polarizing film. This invention introduces an antistatic agent and POSS-modified graphene oxide into the modified adhesive, making the adhesive layer a conductive medium connecting multiple layers such as the polarizing film (PVA), TAC layer, and privacy film, forming a cross-layer conductive path. This avoids static electricity accumulation at the interface, improving the antistatic effect. Boric acid is first used to crosslink the PVA film, followed by glyoxal crosslinking, achieving long-term reliability of the polarizing film under high temperature and high humidity environments.

This invention relates to a silicon-modified inorganic stone-like paint and its preparation method. The silicon-modified inorganic stone-like paint is mainly prepared from the following components in parts by weight: 10-20 parts of cyclosiloxane monomer-modified styrene-acrylic emulsion, 1-10 parts of epoxy-modified silica, 0.02-1 parts of methacryloyloxy-modified silica, 0.02-0.5 parts of glyoxal-modified hydroxyethyl cellulose ether, 60-75 parts of colored sand, 0.02-0.5 parts of ammonia, 0.2-1 parts of film-forming aid, 0.2-1 parts of antifreeze, 0.02-0.5 parts of thickener, 0.02-0.5 parts of defoamer, 0.02-0.5 parts of bactericide, and 7.85-13.48 parts of water. The silicon-modified inorganic stone paint of the present invention has excellent initial water spraying resistance to whitening, storage stability, high spraying atomization efficiency, good anti-splashing properties and low sand shedding rate, and can be widely used in old house renovation and urban renewal.

The application discloses a surface sizing agent for corrugated paper and boxboard, a preparation method and application thereof, and belongs to the technical field of papermaking. The surface sizing agent is prepared by using water as a solvent, adopting an oxidation-reduction initiation system, combining with glyoxal post-crosslinking and polyaluminum chloride / aluminum sulfate post-treatment. The product has low foam, high stability and good paper machine adaptability. After the surface sizing agent is applied to the surface sizing of corrugated paper and boxboard, the ring crush index is increased by 18% to 25%, the Cobb value is reduced by more than 70%, the surface strength and breaking degree resistance are obviously improved, and the quality requirements of high-strength packaging paper are met. The preparation method is green and environment-friendly, and is easy for industrialized production.

The application discloses a synthetic method suitable for industrial production of berberine and berberine hydrochloride, which comprises the following steps: adding berberine acetonitrile, o-veratraldehyde, an alcohol reaction solvent and a mixture of anhydrous copper sulfate-Pd / C in a reaction container in proportion, carrying out a reduction reaction by introducing hydrogen under the conditions of 50-70 DEG C and 0.3-0.8 MPa, removing the hydrogen after the system stops eating hydrogen, adding glyoxal, stirring and heating to 80-100 DEG C, reacting for 4-8 hours or more, cooling to room temperature, and then carrying out suction filtration to obtain a berberine methanol solution; the berberine methanol solution is subjected to post-treatment to obtain berberine or hydrogen chloride is introduced to obtain berberine hydrochloride by crystallization. The catalyst is matched by Pd / C and anhydrous copper sulfate, the temperature and pressure requirements in the reaction process are improved, the traditional high-temperature and high-pressure reaction is reduced to controllable reaction temperature and pressure, the reaction risk is greatly reduced, the catalyst can be recycled and reused, and the material cost and three-waste treatment are reduced.

The application discloses a bactericidal air freshener and a preparation method thereof, and belongs to the field of daily chemicals. The bactericidal air freshener comprises a propellant and a liquid medicine, and the liquid medicine comprises the following components in percentage by weight: d-trans-chloropropene chrysanthemum ester 0.04%-0.08%, hexachlorophene 0.4%-0.8%, glyoxal 3%-7%, a cosolvent 25%-35%, essential oil 0.2%-0.45%, and the balance of water. The preparation method of the bactericidal air freshener comprises the following steps: mixing hexachlorophene, glyoxal, essential oil and the cosolvent uniformly, then adding d-trans-chloropropene chrysanthemum ester, continuously mixing and stirring uniformly, adding water, continuously mixing and stirring uniformly, and preparing the liquid medicine; adding the liquid medicine into a tank body, then filling the tank body with the propellant, and preparing the bactericidal air freshener. The bactericidal air freshener has the advantages of improving the bactericidal and insecticidal capacity of the air freshener.

The present application relates to the technical field of tire rubber manufacturing, and discloses a lignin reinforced high-temperature-resistant rubber product and a preparation method thereof.The rubber product, based on 100 parts by weight of raw rubber, comprises 25-35 parts of lignin masterbatch, 20-50 parts of nano filler, 1-15 parts of active agent, 1-5 parts of vulcanizing agent, 0.1-4 parts of accelerator and 0-10 parts of coupling agent.The lignin masterbatch is prepared by adding the modified lignin under alkaline conditions by catechol and bio-based glyoxal into rubber latex and wet mixing.The lignin masterbatch can improve the dispersion and interfacial bonding of lignin in rubber, improve the tensile strength, modulus and high-temperature mechanical properties of the rubber product, and is suitable for the preparation of lignin reinforced high-temperature-resistant rubber products.

This invention provides an apparatus and method for simultaneously measuring the concentrations of formaldehyde and glyoxal in the atmosphere. The apparatus includes a sample introduction system, an excitation light source, a main cavity, a spectrometer, a wavelength and power correction system, and a software control system. This method can rapidly and accurately measure the concentrations of formaldehyde and glyoxal in the atmosphere simultaneously with time resolution. This invention utilizes a highly selective and sensitive laser-induced emission spectrometer to achieve real-time monitoring of VOCs in hazy weather. It employs time-division multiplexing technology to achieve multi-level selectivity of the results, eliminating interference from field measurements, providing experimental support for tracing the sources of VOCs emissions, and providing strong technical support for studying the intrinsic mechanisms of atmospheric VOCs reaction kinetics. It boasts higher resolution, faster detection speed, and the ability to obtain more multi-dimensional data, and also has advantages such as low cost, modularity, and miniaturization.

Fiber-containing composites are described that contain woven or non-woven fibers, and a cured binder formed from a binder composition that includes (1) a reducing sugar and (2) a crosslinking agent that includes a first carbon moiety selected from an aldehyde, a ketone, a nitrile, and a nitro group, wherein an α-carbon atom having at least one acidic hydrogen is directly bonded to the first carbon moiety. Exemplary reducing sugars include dextrose and exemplary crosslinking agents include glyoxal. Exemplary fiber-containing composites may include fiberglass insulation.

This application provides a smart thermochromic phase change microcapsule composite material for architectural glass, its preparation method, and its application, relating to the field of building energy-saving materials technology. The composite material comprises a phase change core material composed of tetradecyl alcohol, butyl stearate, and docosane; a composite wall material composed of urea-formaldehyde prepolymer, melamine prepolymer, and glyoxal-modified starch; and is prepared in conjunction with cuprous thiocyanate nanowires, a thermal conductivity modifier, and a transparent film-forming matrix. Through multi-component synergistic design, the thermochromic, phase change heat storage, and transparent film-forming properties are unified, significantly improving the composite material's thermal response sensitivity, heat storage stability, and photothermal regulation capability. Simultaneously, it improves the light transmittance, thermal insulation performance, and cycle life of architectural glass, and can be widely applied in the field of energy-saving smart architectural glass.

The application discloses a preparation process of berberine hydrochloride and belongs to the technical field of berberine production. The preparation process of the berberine hydrochloride comprises the following steps: S1, mixing iron sulfate-aluminum sulfate composite salt, sodium chloride, zinc chloride and anhydrous formic acid to pre-activate, adding N-2,3-dimethoxybenzyl piperidyl ethylamine hydrochloride, and dropwise adding a glyoxal mixed solution to perform reflux reaction; S2, cooling the reaction solution to precipitate solids, filtering, stirring the filter cake and diatomite in pure water, adjusting alkalinity, continuously stirring for 0.5-1 hours after temperature rising, cooling and filtering, and reserving the filtrate; S3, adjusting the filtrate to be acidic, cooling and crystallizing, filtering, rinsing the filter cake, vacuum drying the filter cake to obtain the berberine hydrochloride. The berberine hydrochloride prepared by the application has high yield and high purity, the preparation process is safe, the process is short, and the application is friendly to human bodies and the environment.