13 results about "Urushiol" patented technology

According to the urushiol-modified resorcinol-formaldehyde resin and the preparation method thereof, through chemical grafting of urushiol and a resorcinol-formaldehyde prepolymer, flexible chain segments and natural active sites of urushiol are combined, the high bonding strength of the resorcinol-formaldehyde resin is achieved, and the resin has the advantages of being high in mechanical strength, high in mechanical strength and good in mechanical property. The modified resin with excellent heat resistance, hydrophobicity, bonding strength and environmental friendliness is prepared, the modified resin is used for replacing resorcinol-formaldehyde resin to be applied to tire tread rubber, heat resistance, wear resistance, hydrophobicity and wet skid resistance can be remarkably improved, and the modified resin is suitable for manufacturing of high-performance tires.

The present invention relates to a method for manufacturing flexible polyurethane foam having a coating layer formed thereon, the coating layer being formed on polyurethane foam (PUF). In addition, the coating layer is characterized by comprising yellow clay, a zeolite mineral, and a germanium raw material. Moreover, as the coating layer further comprises a urushiol extract, the present invention has remarkable effects including minimal alteration of the physical properties of the polyurethane foam, excellent antibacterial properties, enhanced far-infrared radiation, superior deodorization, odor reduction, and dehumidification capabilities, as well as heat-storage and heat-generation properties.

The application discloses a spraying type urushiol antibacterial waterproof paint and a preparation method thereof, and belongs to the technical field of biomass paint, and comprises the following steps: carrying out a thermal polymerization reaction on urushiol and pyrogallic acid at high temperature to obtain a high-polyphenol polymer; then taking the high-polyphenol polymer as raw material, blending the high-polyphenol polymer with other additives, and then reacting with diisocyanate to obtain the urushiol antibacterial waterproof paint. The paint has good film forming property, corrosion resistance and antibacterial waterproof property, and can be widely applied to the fields of medical devices, food equipment, furniture decoration and building paint.

The application discloses a green micro-extraction method of urushiol compounds in lacquer tree. The method mainly comprises raw material pretreatment, high-speed grinding of raw materials, additives and stainless steel balls in a vortex instrument, then micro-extraction is carried out by means of ultrasonic cavitation or vortex oscillation, and finally centrifugation and filtration are carried out. The method can effectively extract and enrich urushiol compounds, the operation time is short, the urushiol can be efficiently enriched, and the extraction efficiency is improved. Meanwhile, the operation process is simple, the contact between the sample and the solvent is small, the risk of allergy caused by urushiol is greatly reduced, and the rapid extraction and analysis of urushiol can be realized.

The application discloses cellulose acetate nanofiber membrane and a preparation method and application thereof, and the preparation method comprises the following steps: mixing cellulose acetate and N,N-dimethylacetamide, heating to 50-60 DEG C under stirring and stirring at the temperature for 6-8 h to obtain a first mixed solution, adding urushiol into the first mixed solution to obtain a second mixed solution, heating to 70-80 DEG C under stirring and stirring at the temperature for 4-6 h to obtain a third mixed solution, cooling to room temperature, adding anhydrous copper sulfate into the third mixed solution under stirring, continuing to stir for 4-6 h to obtain a spinning solution, and performing electrostatic spinning on the spinning solution to obtain the cellulose acetate nanofiber membrane. The cellulose acetate nanofiber membrane has high acid resistance, prevents clothes covered with the cellulose acetate nanofiber membrane from being corroded and damaged by acidic agents during use, has good killing effect on escherichia coli and staphylococcus aureus, and also has good killing effect on influenza A virus.

This invention discloses a UV-curable raw lacquer hybrid prepolymer coating and its preparation method, comprising: rosin acid, hydroxyethyl acrylate, p-toluenesulfonic acid, polymerization inhibitor, 4-acryloyloxybenzophenone, polyethylene glycol methyl ether acrylate, azobisisobutyronitrile, refined raw lacquer, trimethylolpropane triacrylate, leveling agent, and defoamer. The coating uses rosin acid as a rigid framework, forming a macromolecular photoinitiator by side-linking benzophenone photoinitiator groups and flexible polyether segments. Then, through a controllable UV pre-irradiation process, it undergoes free radical grafting with lacquer urushiol to construct a "rigid-tough tunable" hybrid network. This invention solves the problems of slow curing of raw lacquer, easy migration of small-molecule photoinitiators, and high coating brittleness in existing technologies. The coating uses a macromolecular photoinitiator design, with the initiating groups fixed to the rosin framework through chemical bonds, fundamentally solving the migration problem. Furthermore, the "pre-grafting" process improves compatibility, endowing the coating with excellent comprehensive properties.

The invention discloses a lacquer ware pattern transfer printing method based on a raw lacquer medium, which belongs to the technical field of porcelain processing, and specifically comprises the following five steps: selection of a transfer printing medium, coating of the transfer printing medium, image transfer printing, removal of drawing paper and reinforcement and color protection. The natural raw lacquer coating with the urushiol content of 80% or above serves as a lacquer pattern transfer printing medium, namely, a raw lacquer coating is coated on the lacquer surface again, the compatibility problem of the transfer printing medium raw lacquer coating is well solved, the raw lacquer coating is self-contained and totally natural, the attractiveness of pattern pictures is ensured, meanwhile, special image transfer printing equipment is adopted, and the production cost is reduced. And the whole technology is low in cost, easy and convenient to operate and suitable for mass production of lacquerware.

The application discloses a sodium alginate / urushiol-based water-based paint modifier, which is prepared by the following steps: firstly, pre-supporting treatment of alpha-zirconium phosphate is carried out by using cetyltrimethylammonium bromide, and in-situ reduction of the alpha-zirconium phosphate is carried out to generate urushiol titanium, so as to obtain a urushiol-based corrosion inhibitor; simultaneously, grafting of sodium alginate is carried out by using dodecyl triethoxysilane, so as to obtain amphiphilic sodium alginate; then, the obtained urushiol-based corrosion inhibitor and the obtained amphiphilic sodium alginate are stirred and uniformly mixed in deionized water, and the water-based paint modifier is prepared by ball milling. The prepared water-based paint modifier has good hydrophilicity and corrosion inhibition effect, and when the water-based paint modifier is used in water-based paint, the long-term corrosion resistance of the water-based paint to a metal substrate can be effectively improved.

This patent discloses a lacquer-based DA-bond self-healing coating and its preparation and application methods. The coating film exhibits high hardness, excellent corrosion resistance and antibacterial properties, and can autonomously repair microcracks under thermal stimulation when applied to material surfaces. 67-74 parts of raw lacquer (urushiol mass fraction ≈ 65%) undergo vacuum degassing pretreatment. Separately, 11-18 parts of N,N′-(4,4′-methylenediphenyl)bismaleimide are dissolved in anhydrous ethanol to prepare a homogeneous BMI-ethanol solution. The BMI-ethanol solution is slowly added to the pretreated raw lacquer and stirred. Then, 1-4 parts of triethylamine and 1-4 parts of pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxyphenylpropionic acid) ester are added sequentially to continue the reaction. A thermally reversible three-dimensional network is constructed using the Diels-Alder reaction between the inherent conjugated diene of the urushiol side chain and the maleimide groups of BMI. The final product is cured and defoamed to obtain the lacquer-based DA-bond self-healing coating.

The invention discloses an artificial urushiol monomer prepared based on a fused ring aromatic compound and a terpenoid. The artificial urushiol monomer is obtained through the Friedel-Crafts alkylation reaction between the easily-prepared fused ring aromatic compound and the cheap and easily-obtained terpenoids or derivatives thereof, the synthetic method is relatively short in route, and the product can be directly used without purification. The prepared artificial urushiol monomer is free of sensitization, has good film-forming property, can be used for preparing various photosensitive coatings, and has good application potential in the fields of photocatalysis, fluorescence sensing and the like.

The invention relates to the field of bio-enzyme synthetic high polymer materials, and particularly discloses a preparation method of an enzymatic self-assembled urushiol functional membrane, by introducing polyporus bellis laccase and utilizing plant source urushiol to directionally and enzymatically synthesize the urushiol functional membrane, the limitation that the urushiol depends on lacquer tree laccase to form a membrane in the prior art is effectively broken through, and the application prospect is broad. The technical problems that lacquer tree laccase is high in price, large in extraction difficulty and the like are solved, and an example for catalyzing urushiol to form a film through exogenous laccase is provided. According to the method for forming the urushiol film through self-assembly of the laccase, green, environment-friendly, simple, convenient, efficient, specific and definite preparation of the functional film through the enzymatic reaction is achieved, a material basis is provided for research and function development of urushiol film forming, and meanwhile theoretical and technical supports are provided for follow-up industrial production and utilization of urushiol biomass coatings.

This invention relates to a water-based dyeing process for lacquered leather using natural lacquer, belonging to the technical field of leather dyeing and improvement of traditional techniques. The technical problem this invention aims to solve is the poor adhesion of existing mineral pigments to leather surfaces and the tendency for patterns to peel off. The key technical points of this invention include: firstly, pre-treating the leather surface; then preparing a lacquer layer on the pre-treated leather surface, formed by drying and curing natural lacquer at 20-30℃ and 60-80% relative humidity; next, preparing a natural plant-based paint solution and a mineral pigment dispersion; then, dripping the pigment dispersion onto the paint solution surface to draw the pattern; and finally, water-based dyeing of the lacquered leather surface by contacting the paint solution for 5-30 seconds; and finally, completing the color fixation process by drying at 20-30℃ and heat-fixing for 24-72 seconds. This invention significantly improves pigment adhesion by forming stable chemical bonds through the coordination complexation reaction between the phenolic hydroxyl groups of urushiol in the lacquer layer and the metal ions in the mineral pigments, achieving a color fastness of grade 4 or higher for both wet and dry rubbing. This invention is applicable to high-end leather goods, furniture, artworks, and home decorations.