335results about "Leather surface finishing" patented technology

The invention belongs to the technical field of polyurethane coatings and coatings, and particularly relates to an anti-doodling polyurethane coating, a coating as well as a preparation method and application of the anti-doodling polyurethane coating, and the anti-doodling polyurethane coating comprises the following components in parts by weight: 15-30 parts of dimercaptomercaptan, 5-30 parts of polymercaptan, 0.20-0.6 part of a catalyst and 20-55 parts of isocyanate. The molecular weight of the dimercapto mercaptan is 154.32; and the molecular weight of the polymercaptan is 260.53. Polyurethane is prepared through reaction of dimercaptomercaptan, polymercaptan and isocyanate, the adhesion performance and anti-doodling performance of polyurethane on the surface of synthetic leather / leather are remarkably improved, industrial production is easy, and wide application prospects and market value are achieved.

The invention discloses a wear-resistant coating and application thereof on a leather surface, and belongs to the technical field of leather finishing. The coating comprises a functionalized polyurethane-acrylate composite emulsion, a photoinitiator, an auxiliary agent and deionized water. Wherein the composite emulsion is prepared from hyperbranched polyester polyol, a dynamic bond chain extender and the like through prepolymerization, fluorine-containing grafting and in-situ sol-gel reaction, a hyperbranched skeleton provides mechanical support, double dynamic bonds endow a self-repairing function, in-situ nano-compounding enhances wear resistance, a diurea hydrogen bond enhances binding force, and a fluorine-containing side chain endows a coating with hydrophobic and stain-resistant performance; and preparing the coating by matching with a gradient curing process. The coating prepared by the invention has high wear resistance, efficient self-repairing property, firm adhesive force, excellent stain resistance and leather adaptation flexibility, and meets the actual requirements of middle and high-end leather finishing.

The invention relates to the technical field of finishing agents, and discloses a fluoride-free leather water-repellent finishing agent and a preparation process thereof. The preparation method comprises the following steps: reacting hydrogen-containing silicone oil, N-methylallylamino hydroxypropyl alkane and a bromoalkane monomer to obtain hydroxyl quaternary ammonium salt silicone oil; the fluorine-free leather water-repellent finishing agent contains hydrophobic silicone oil and a plurality of alkyl long carbon chains, and the hydrophobic silicone oil and the alkyl long carbon chains are introduced into a polyurethane molecular chain through a polymerization chain extension reaction, so that the hydrophobic and water-repellent properties of the polyurethane finishing agent and the leather are remarkably improved, and the water-repellent property of the leather is improved. And the hydroxyl quaternary ammonium salt silicone oil contains an organosilane quaternary ammonium salt antibacterial group which is introduced into a polyurethane molecular chain, so that the finishing agent and the leather are endowed with excellent antibacterial performance.

The invention provides high-strength waterproof flame-retardant clothing leather and a preparation method thereof.The method comprises the steps that a sheepskin raw material is obtained, degreasing treatment is conducted on the sheepskin raw material through a degreasing agent, liming treatment is conducted on the sheepskin raw material subjected to degreasing treatment through liming liquid, and a first leather semi-finished product is obtained; performing basic tanning treatment on the first leather semi-finished product by adopting a target chrome-free tanning agent to obtain a second leather semi-finished product; carrying out retanning treatment on the second leather semi-finished product by adopting a target retanning agent to obtain a third leather semi-finished product; performing post-treatment on the third leather semi-finished product to obtain a fourth leather semi-finished product; the fourth leather semi-finished product is subjected to coating spraying treatment, a waterproof layer, a flame-retardant layer and a modification layer are formed on the surface of the fourth leather semi-finished product, a fifth leather semi-finished product is obtained, and the fifth leather semi-finished product is subjected to soft finishing, so that the high-strength waterproof flame-retardant clothing leather finished product is obtained. The waterproof and flame-retardant effects are good, and the cost is low.

The invention provides a preparation method of a self-repairing waterborne polyurethane leather coating material containing a polyurethane colloid capsule, which comprises the following steps: firstly, preparing an O / W type Pickering emulsion by taking modified SiO2 nanoparticles as a stabilizer and a polyurethane solution as an oil phase; the preparation method comprises the following steps: firstly, taking the polyurethane colloid capsule as a template, forming the colloid capsule capable of being dispersed in a water system through a sol-gel reaction, and finally, uniformly dispersing the colloid capsule into a waterborne polyurethane leather finishing emulsion to prepare the waterborne polyurethane leather self-repairing coating material containing the polyurethane colloid capsule. According to the invention, the polyurethane healing agent is used as a core material, and the modified SiO2 nanoparticles are used as a shell wall, so that the prepared spherical colloid capsule is high in encapsulation efficiency and strong in stability. According to the preparation method provided by the invention, the problems of poor self-repairing performance and mechanical property caused by low compatibility of a healing agent and a polyurethane matrix for leather finishing and easy agglomeration of a traditional microcapsule in a waterborne polyurethane emulsion in a traditional external aid type self-repairing polyurethane coating are solved; and the wear resistance of the leather polyurethane coating is remarkably improved by introducing SiO2.

The application discloses a kind of leathers with conductive gradient structure and its preparation method and application, the method is by ultrasonic and physical mechanical action, makes hydrotalcite, carbon black, polypyrrole etc. Conductive material enters the inside of leather collagen fiber, the modification of collagen fiber of leather is carried out.The preparation method provided by the application can increase the porosity of leather fiber structure, facilitate multiple reflection of electromagnetic wave in leather inside;Meanwhile, conductive material constructs conductive network in the inside of collagen fiber, and the leather with conductive gradient structure is prepared, which is conducive to enhancing the absorption loss of electromagnetic wave by conductive material.The electromagnetic shielding leather prepared by the preparation method provided by the application has a shrinkage temperature of 77 DEG C and an electromagnetic shielding effectiveness of 45 dB, indicating that the leather has good thermal stability and electromagnetic shielding performance.

The application belongs to the field of leather auxiliaries, and particularly relates to a kind of anti-stain, sound-damping and touch agent for leather and a preparation method thereof. The preparation method comprises the following steps: mixing double allyl polyether, allyl methacrylate, a catalyst and hydrogen-terminated polydimethylmethylhydrogen siloxane, then heating and reacting to obtain an intermediate; mixing the intermediate with isomeric tridecanol polyoxyethylene ether 1305 and isomeric tridecanol polyoxyethylene ether 1307, then heating, stirring and dispersing, and adding deionized water to continue stirring and dispersing. The anti-stain, sound-damping and touch agent for leather does not contain fluorine in the structure, so it is not limited in use due to the fluorine ban. In addition, different from conventional hyperbranched, the present application adopts silicon-hydrogen addition hyperbranched, which is more flexible in structure design, has a larger silicon crosslinking density, can achieve better anti-stain and sound-damping effects, and can improve the physical properties of the finishing system. The touch of the anti-stain, sound-damping and touch agent for leather can be adjusted to a large extent, and it is more widely applicable.

A textile treatment emulsion formulation includes a silicone-(meth)acrylate copolymer, a surfactant, water and a blocked isocyanate and method for its preparation are disclosed. The textile treatment emulsion may be used in a method including coating the emulsion formulation on a textile and heating the textile to dry the emulsion formulation. This method renders the textile oil repellent.

The invention discloses a textile treatment emulsion preparation containing a silicone-(methyl) acrylate copolymer, a surfactant, water and blocked isocyanate and a preparation method of the textile treatment emulsion preparation. The textile treatment emulsion can be used in a process that includes coating the emulsion formulation on a textile and heating the textile to dry the emulsion formulation. According to the method, the textile has oil repellency.

The utility model discloses a device capable of improving the degree of dyeing of leather dyestuff, which comprises a machine body supporting shell, a dyeing cylinder arranged on the right side of the machine body supporting shell, a first positioning strip arranged on the outer side of the dyeing cylinder, a supporting plate arranged on the rear side of the machine body supporting shell, a power line connected to the rear side of the supporting plate, and a power line connected to the power line. A heating pipe is arranged at the front end of the supporting plate. According to the device capable of improving the dyeing rate of the leather dye, the dye can be conveniently heated in the using process, so that the molecular activity of the dye is not easily influenced by the temperature, the efficiency of the dye permeating into leather fibers is improved, and the dyeing efficiency of the dye is prevented from being influenced; meanwhile, after use, the processing raw materials can be hung and aired conveniently, so that leather is not prone to carrying a large amount of undried dye liquid to be discharged outwards, the use consumption of dye is reduced, the operation cost of the device is reduced, and a better use effect is achieved.

The utility model relates to the technical field of leather processing equipment, in particular to leather auxiliary sizing equipment. According to the technical scheme, the leather sizing device comprises a sliding table rail and further comprises a sliding mechanism which is installed on the sliding table rail and used for moving left and right for sizing after leather is placed on the sliding table rail. According to the leather sizing device, the structures such as the sliding mechanism, the extruding mechanism, the driving mechanism and the brush mechanism are matched, leather only needs to be placed on the sizing operation table to be fixed, then the first motor and the second motor are started in sequence, the leather sizing device can achieve automatic operation, and compared with a traditional manual sizing mode, the leather sizing device is convenient to operate. And manpower and time cost are saved. In addition, the equipment can also uniformly smear slurry, so that the quality of leather products is more stable, and the product quality difference caused by uneven manual operation is reduced. In addition, after the leather sizing equipment is used, a worker does not need to carry out repeated operation with high physical output, and the labor intensity is reduced.

The application discloses a wear-resistant coating and application thereof to a leather surface, and belongs to the technical field of leather finishing. The coating comprises a functional polyurethane-acrylate composite emulsion, a photoinitiator, an additive and deionized water. The composite emulsion is prepared through pre-polymerization, fluorine-containing grafting and in-situ sol-gel reaction of hyperbranched polyester polyol, dynamic bond chain extender and the like. The hyperbranched skeleton provides mechanical support, the double dynamic bonds endow the coating with self-repairing function, in-situ nano-composite enhances wear resistance, the double urea hydrogen bonds strengthen the bonding force, and the fluorine-containing side chains endow the coating with hydrophobic and stain-resistant properties. The coating is prepared by matching a gradient curing process. The coating prepared by the application has high wear resistance, efficient self-repairing property, firm adhesion, excellent stain resistance and leather-adaptive flexibility, and meets the actual needs of medium and high-end leather finishing.

The disclosure provides leather articles and a method for making leather articles comprising a substrate and a coating comprising a cellulose derivative having improved colorfastness to rubbing. The cellulose derivative may be methyl cellulose, ethyl cellulose, ethyl methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, cellulose acetate, cellulose triacetate, cellulose propionate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, cellulose nitrate, or cellulose sulfate.

The invention relates to the field of leather, in particular to antifouling and scratch-resistant leather and a preparation method thereof, and aims to solve the problems that the attractiveness and the service life of the surface of the leather are seriously influenced due to poor antifouling property and scratch resistance of the conventional natural leather. According to the preparation method, polyether polyol and diisocyanate react to form polyurethane, the polyurethane can be uniformly attached to the surface of the natural cow leather to form a protective layer, the surface of the natural cow leather is well protected, after an epoxy fluorine-containing compound is added, the stain resistance of the protective layer can be remarkably improved, meanwhile, the lubricating property of the protective layer is improved, and the service life of the natural cow leather is prolonged. According to the present invention, the anti-fouling performance and the anti-scraping performance are improved, the hardness and the wear resistance of the protection layer can be significantly improved after the multi-amino modified anti-scraping particles are added so as to further improve the anti-scraping performance, and the finally prepared leather has advantages of excellent anti-fouling performance and excellent anti-scraping performance so as to improve the aesthetic degree and the durability of the leather surface.

The invention relates to the technical field of essences, in particular to a high-temperature-resistant long-lasting slow-release double-layer microcapsule powder essence and a preparation method thereof.The high-temperature-resistant long-lasting slow-release double-layer microcapsule powder essence comprises a core material and a wall material wrapping the core material, the wall material accounts for 75-90 wt%, and the core material accounts for 10-25 wt%; the core material comprises the following raw materials in parts by weight: an oil phase: 25-35 parts of oily essence and 0.5-6 parts of diisocyanate; a water phase: 10-20 parts of a surfactant, 2-6 parts of amino resin, 0.1-2 parts of a pH regulator and 44.6-84 parts of deionized water; the wall material comprises a starch derivative. The double-layer microcapsule powder essence is formed by coating the oily essence in a double-layer manner, the volatile oily essence is protected in a double-layer manner, the fragrance retention time of the essence is greatly prolonged, and on the other hand, the double-layer microcapsule powder essence has the effect of resisting high temperature and high pressure, can slowly release fragrance for a long time, and is safe and reliable. The problems that essence is easy to volatilize, not resistant to high temperature and not easy to use in a leather perfuming scene are solved.

The invention discloses an anti-aging water-based paint suitable for a leather surface, and belongs to the technical field of coatings. The anti-aging water-based paint is composed of a component A, a component B, a free radical trapping agent, a flatting agent and a defoaming agent, the component A is an acrylate copolymer emulsion containing a weather-resistant functional monomer, and the component B is a silane-terminated water-based polyurethane emulsion. The weather-resistant functional monomer is synthesized through three-step reaction and integrates ultraviolet absorption, light energy conversion and crosslinking functions; the component A is prepared through pre-emulsification semi-continuous seed polymerization, the component B is prepared through pre-polymerization, hydrophilic chain extension, silane end capping and emulsification, the component A and the component B are hybridized in proportion, then an auxiliary agent is added, and pH and viscosity are adjusted to obtain a finished product. According to the invention, a complete anti-aging protection system is constructed, has excellent adhesive force, flexibility and friction resistance, is adaptive to leather working conditions, has low VOC content, can avoid yellowing and shedding of a coating, and prolongs the service life of leather products.

The invention belongs to the technical field of fine chemical engineering and leather chemicals, and particularly relates to amide wax for self-emulsifying leather as well as a preparation method and application of the amide wax. The preparation method comprises the following steps: mixing a long-chain hydrophobic compound, an amino-containing compound and a metal catalyst, heating, and reacting to obtain a first reaction system; adding hydrophilic polyether and an organic acid catalyst into the first reaction system, heating and reacting to obtain a second reaction system; and vacuumizing the second reaction system to remove residual small molecules and low-boiling-point substances, and cooling to obtain the amide wax for the self-emulsifying leather. The self-emulsifying amide wax for leather has an amphiphilic structure, and can be self-dispersed in hot water to form a stable emulsion without adding an emulsifier. The finishing agent can be anchored with a metal cross-linking agent, endows leather with lasting smooth hand feeling, high fullness and excellent waterproofness, is suitable for finishing a top layer or a middle layer of the leather, and is convenient to apply and environment-friendly.

The invention discloses a method for deacidifying Tan sheep fur double-face leather, and particularly relates to the technical field of fur processing, which comprises the following steps: S1, pretreatment before deacidification; s2, washing with water; s3, neutralizing with a neutralizing solution; s4, fat liquoring is carried out; and S5, performing subsequent treatment. According to the method for deacidifying the Tan sheep fur double-face leather, residual chemicals and scraps can be efficiently removed through multi-stage countercurrent water washing, in the neutralization step of the neutralization liquid, the temperature, the chemical proportion and the stirring speed are accurately controlled, bromocresol green detection is combined, it is ensured that the neutralization reaction is complete, the deacidification effect is remarkable, and the deacidification efficiency is high and thorough; through the fat liquoring step, the double-face leather fully absorbs a fat liquoring agent and recovers softness and glossiness, meanwhile, through pretreatment and optimized operation of all links, damage to double-face leather fibers is avoided, the quality of the double-face leather is guaranteed, the quality of the double-face leather is remarkably improved, through biological enzyme softening treatment, use of chemical agents is reduced, environmental pollution is reduced, and the method meets the environmental protection requirement; the environment-friendly benefit is outstanding.

A first treatment plant (100) and a second treatment plant (200) for respectively performing a first and a second surface treatment of a laminar support (1) for producing a multilayer laminar product (6). The first treatment plant (100) provides an outlet winding assembly (114) for winding on a transfer reel (400) the strip of laminar element (4) coupled with the treated laminar support (1), while the second treatment plant (200) comprises at the inlet an unwinding assembly (201) configured to unwind the transfer reel (400) of the first treatment plant (100) so as to perform a second treatment on said laminar support (1).

An aqueous coating composition comprising an aminosiloxane ester copolymer, an acrylic or polyurethane polymer, a surfactant, and water. The aqueous coating composition can be prepared by mixing an aqueous emulsion comprising an aminosiloxane copolymer, a surfactant, and water with an aqueous organic binder or dispersion. The aqueous coating composition can be used for leather treatment. The aqueous coating composition can be applied to a leather substrate and dried to remove water, thereby providing a coating on the leather substrate having a low coefficient of friction.

The invention relates to the technical field of leather finishing agents, and discloses environment-friendly weather-resistant waterborne polyurethane for leather finishing and a preparation method of the environment-friendly weather-resistant waterborne polyurethane. The preparation method comprises the following steps: adding thiolated modified titanium dioxide into ethyl acetate, adding 4-allyl catechol, 2-methyl-2-acrylic acid-2, 2, 6, 6-tetramethyl-4-piperidyl ester and a photoinitiator, uniformly stirring, irradiating with ultraviolet light, filtering, washing, and drying to obtain a titanium dioxide weather-resistant agent; under the protection of nitrogen, heating polytetrahydrofuran glycol, composite modified montmorillonite and isophorone diisocyanate, adding a catalyst for reaction, adding dimethylolpropionic acid, stirring while keeping the temperature, adding ethylene glycol, and stirring while keeping the temperature to obtain a polyurethane prepolymer; and adding triethylamine, stirring, adding water and a titanium dioxide weather-resistant agent, uniformly dispersing, adding ethidene diamine, and uniformly stirring to obtain the waterborne polyurethane. The prepared waterborne polyurethane has good weather resistance and wear resistance.

The invention relates to the field of chemical engineering, in particular to a waterborne polyurethane coating agent emulsion and a preparation method thereof. The preparation method provided by the invention comprises the following steps: mixing dihydric alcohol and isocyanate, and heating to react; then, adding a hydrophilic chain extender, and continuously reacting; then, cooling, adding a catalyst and a solvent, and further reacting to obtain a reactant 1; then, adding a neutralizer into the reactant 1 to carry out neutralization reaction; and adding water for dispersion, adding an amine chain extender, stirring for reaction, and removing the solvent to obtain the waterborne polyurethane coating agent emulsion. Wherein the dihydric alcohol is prepared by matching specific crystalline polycarbonate dihydric alcohol and hydroxyl-terminated polybutadiene, and the hydrolysis resistance, the low-temperature bending resistance and the dry and wet rubbing resistance of the waterborne polyurethane can be effectively improved in combination with selection and condition control of other raw materials.

The invention discloses wear-resistant and scratch-resistant leather and a preparation method thereof, and belongs to the technical field of leather preparation. The animal leather obtained after liming, softening, tanning and retanning is coated; the preparation method of the coating agent for coating comprises the following steps: preparing a polyurethane preform by taking polytetrahydrofuran, fluorine-containing dihydric alcohol and isophorone diisocyanate as raw materials; preparing a polyurethane emulsion by taking the polyurethane preform, a chain extender, coumarin and a derivative end-capping reagent thereof as raw materials; hydrotalcite modified silicon dioxide is prepared through a coprecipitation method, and then fluoridation modification is carried out; carrying out ultrasonic blending with dopamine hydrochloride, deionized water and ethanol, adding a Tris-HCl buffer solution, stirring, carrying out centrifugal separation, taking a solid phase, washing, and drying to obtain a polydopamine coating; the polyurethane emulsion and the polydopamine coating are taken and mixed, and the coating agent is obtained. The coating agent is coated on the surface of the leather, so that the wear resistance and scratch resistance of the leather are improved.

Coating compositions, methods of producing a cured coating, and articles coated with a cured coating are provided. In an exemplary embodiment, a coating composition includes a crosslinking agent, an acrylic resin, a catalyst, and a catalyst blocker that blocks the catalyst. The crosslinking agent includes an alkylated melamine, and the acrylic resin has a hydroxyl value of from about 5 to about 110 milligrams potassium hydroxide per gram of acrylic resin. The catalyst includes a sulfonic acid, and the catalyst blocker includes an amine with a boiling point of about 300 degrees Celsius or higher.

The invention relates to a spreading machine for roller leather finishing.

The present application relates to a method for preparing conductive leather, conductive leather, and its application and finishing methods, and more particularly to a method for preparing conductive leather, conductive leather, and its application and finishing methods that can be applied to electronic products such as flexible or wearable devices. The conductive leather preparation method includes grinding the leather, a primary tanning process in which a conductive material and leather are drum-tanned together, and a secondary tanning process in which the leather obtained above is drum-tanned together with ingredients such as organic raw materials. The conductive leather obtained by this preparation method not only has basic conductivity but also has high wear resistance, thereby ensuring its durability and preventing a decrease in its sensory ability.

The preparation method comprises the following steps: S1, preparing an F127 solution: dissolving F127 in deionized water or an ethanol-water mixed solvent, and stirring until the F127 is completely dissolved, so as to form a uniform and transparent F127 solution; s2, dispersing aerogel particles: adding the dried aerogel particles into the F127 solution obtained in the step S1, and performing ultrasonic treatment to form a stable aerogel-F127 suspension; s3, pretreating a leather base material: carrying out surface cleaning and surface treatment on the leather base material to improve the surface energy and wettability of the leather base material; s4, coating treatment is conducted, specifically, the surface of the pretreated leather base material is evenly coated with the aerogel-F127 suspension liquid obtained in the step S2; and S5, drying and curing: drying and volatilizing the coated leather base material to form a uniform aerogel coating. The dispersion behavior of aerogel particles is regulated and controlled by introducing F127, so that the long-standing problems of agglomeration, poor dispersion and insufficient binding force of aerogel in the leather application process are solved.

The invention discloses novel efficient nourishing leather oil and a preparation method thereof. The novel efficient nourishing leather oil is prepared from a natural vegetable oil matrix, hydrolyzed collagen, nano silicon dioxide aerogel, a vegetable wax compound, an antioxidant system and a bioactive penetrant. The preparation method adopts a low-temperature gradient mixing and high-pressure homogenizing process to realize stable dispersion of active components. Tests show that the penetration depth of the product reaches 2.3 times that of a traditional product, the wear resistance is improved by 40%, the biodegradation rate is larger than 90%, and the product is suitable for long-acting maintenance of high-grade leatherware.

The invention relates to the technical field of essential oil microcapsules, and provides an essential oil sustained-release microcapsule as well as a preparation method and application thereof. According to the preparation method, a polyurethane prepolymer, hydroxyl silicone oil and essential oil are taken as main raw materials, and the essential oil-coated sustained-release microcapsule is prepared by interfacial polymerization. The essential oil sustained-release microcapsule provided by the invention has a fragrance sustained-release function and lasting antibacterial performance, has a wide application prospect, can be applied to fabric products, leather products, paper products and the like, and has good washing and rubbing fastness on the fabric products.

An aqueous matte finish coating composition comprising at least one acrylic dispersion having a plurality of crosslinked particles comprising a plurality of first acrylic particles having a median weight average particle size of 4 microns or less in diameter and a surface Young's modulus of 450 megapascals or greater; a process for producing said aqueous matte coating composition; and a coated substrate coated with a dried coating made using said aqueous matte coating composition.