33results about How to "Fast cross-linking reaction" patented technology

The invention discloses water-based composite adhesive, which contains acrylate emulsion and a cross-linking agent, wherein the weight of the cross-linking agent is 0.1-6 percent of the weight of the acrylate emulsion; the cross-linking agent is any one or a mixture of hexamethylenediamine and adipic acid dihydrazide; and the acrylate emulsion is formed by copolymerizing a terpenes hard monomer, a terpenes soft monomer, a terpenes carboxylic acid monomer, a terpenes functional monomer, a dual-vinyl monomer and a terpenes cross-linking monomer through nuclear shells under an emulsion system. The adhesive is particularly suitable for dry-type composite adhesion between flexible package composite base materials such as a plastic film and a vacuum aluminized film which are processed through corona; has good leveling, fast drying, high transparency, capability of curing at room temperature, high initial strength, excellent peel strength, difficulty in mesh clogging and skinning, wide adaptability and low cost; and can be applied to various machine types, does not contain any organic solvent, can replace solvent adhesive at present completely, and belongs to environment friendly adhesive.

The invention discloses a method for preparing a functional polymer material, and belongs to the field of fiber material and plastic processing. The invention aims at solving the shortcomings of low efficiency and high cost of carrying out functionalization on traditional polymer materials by blending and surface chemical grafting. The method disclosed by the invention comprises the following steps: acting an alternating electric field on functional material particles to be physically embedded on the surface of an extruded base material of the polymer material, carrying out chemical crosslinking and physical blending on a crosslinking group and the surface of the base material of the polymer material, and blowing cold air to the base material of the polymer material for curing or blowing cold air to the base material of the polymer material for curing after stretching to obtain the functional polymer material. The selection range of functional substances in the method disclosed by the invention is very wide, the utilization rate is high, the effect is good, the dosage is small, the preparation procedure of the material is short, and the efficiency is high, so that the method can be widely used in the fields of the textile and garment industry, plastic industry, environmental management, drug extraction and the like.

A paint for the coiled insulating and anticorrosion material is prepared from special polyester resin, high etherified cross-linking resin and pigment, functional insulating filler, special chemical assistant and solvent through proportional mixing, dispersing, grinding, adding insulating filler, etc. Its advantages are no poison and pollution, high flame-retarding and insulating effect, and high resistance to ageing and corrosion.

The invention provides an anti-skid powder coating. The anti-skid powder coating is prepared from carboxyl-terminated polyester resin, a curing agent, filler, talcum powder, titanium dioxide, mica powder, an anti-skid additive, a wear-resistant additive, a curing accelerator, a three-dimensional sand streak agent, a conventional additive, a surface roughening agent, a dispersing agent and pigment. Through cross-linking reaction of two carboxyl-terminated polyester resins with different acid values and the curing agent, the weather resistance of the prepared anti-skid powder coating is improved, and the cross-linking reaction of the two carboxyl-terminated polyester resins with different acid values and the curing agent can be effectively accelerated by adding the curing accelerator, so that the coating is quickly cured, and the anti-skid performance of a coating film is improved; and the mica powder, the dispersing agent and the anti-skid additive are premixed and then added, and the mica powder, the dispersing agent, the anti-skid additive, the three-dimensional sand streak agent, the surface roughening agent and the wear-resistant additive have a synergistic effect, so that a concave-convex state is formed on the surface of a coating, a three-dimensional effect is achieved, and the anti-skid powder coating has remarkable anti-skid performance, wear resistance, weather resistance and scratch resistance.

The invention discloses a preparation method of a low-pressure polymer decolorization nanofiltration membrane as well as a product and application thereof, and the method comprises the following steps: S1, mixing a polymer, a copolymer, a pore-foaming agent and a solvent to obtain a polymer solution, coating the surface of a non-woven fabric with the polymer solution for forming, and washing to remove the solvent and the pore-foaming agent to obtain a blended polymer ultrafiltration membrane; S2, coating the surface of the blended polymer ultrafiltration membrane obtained in the step S1 with apolyamine solution to carry out a cross-linking reaction so as to form a nanofiltration separation layer; and S3, carrying out heat treatment on the ultrafiltration membrane obtained in the step S2 to obtain the product. Articles and uses thereof are also disclosed. The low-pressure polymer decoloration nanofiltration membrane is resistant to oxidation and small in thickness, the separation layerdoes not fall off in the using process, multivalent ions and colored soluble organic matters can be efficiently separated, and the hydrophilicity, pollution resistance and permeation flux of the membrane are good; besides, the preparation method of the nanofiltration membrane is simple in process, can be used for large-scale production, and has a good industrial application prospect.

The invention provides dry reinforced concrete. The concrete is prepared from, by weight, 55-65 parts of sand, 20-30 parts of rubber material, 10-15 parts of pelelith, 8-12 parts of barium sulfate, 5-10 parts of quartz sand, 5-10 parts of glass fibers, 3-8 parts of borax, 3-8 parts of sandstone, 3-5 parts of sodium sulfate and 3-5 parts of reinforcing agent. The rubber material is a mixture of cement powder, magnesia clay and rubber powder, wherein the weight ratio of the cement powder to the magnesia clay to the rubber powder is (5-8):(3-5):(1-3); the reinforcing agent is a mixture of siliconoxide, allophane and dry reinforcing agent, wherein the weight ratio of silicon oxide, allophane and the dry reinforcing agent is (7-13):(7-10):(3-10). The dry reinforced concrete obtained by adopting the raw materials and a method is high in strength, good in heat resistance and high in frost resistance.

The invention relates to a light-moisture dual-curing polyurethane hot melt adhesive comprising the components in parts by mass: 30 to 80 parts of a polyol polymer, 20 to 40 parts of a polyisocyanate compound, 0.5 to 10 parts of a photobase generator, 5 to 30 parts of thermoplastic resin, 3 to 12 parts of tackifying resin, 0.1 to 5 parts of a photosensitizer and 0.01 to 3 parts of a catalyst. The photobase generator capable of generating primary amine by illumination is introduced into a polyurethane system, a primary amine group generated by illumination quickly reacts with an isocyanate group, carbon dioxide gas is not generated, bubbles are avoided, and meanwhile, due to the delayed reaction characteristic of anions, the opening time has a certain adjustable space, the hot melt adhesive can be used for bonding non-light-transmitting materials; and due to the relatively fast cross-linking reaction, fast fixing can be achieved, and the initial adhesion of polyurethane is improved.

The invention belongs to the field of cellulosic fiber, and particularly discloses a rapid cross-linking method of cellulosic fiber. The rapid crosslinking method comprises the following steps: sending the cellulosic fiber treated by a cross-linking agent into a microwave heating device for microwave heating, and supplementing steam in the microwave heating process. And in the microwave heating process, supplement of steam starts when the fiber temperature is more than or equal to 60 DEG C. According to the method, the fiber can be rapidly heated on a cellulose fiber production line to initiate a cross-linking reaction to prepare the functional cellulose fiber, the method is particularly suitable for achieving a Lyocell short fiber rapid cross-linking reaction on a Lyocell fiber productionline, the fibrillation tendency of Lyocell fiber is reduced, and compared with heating through pure steam and heating through pure microwave, the method is higher in temperature rising speed, carriesout the rapid cross-linking reaction in the heating process, and is better in heating uniformity, lower in energy consumption.

The invention relates to the field of microporous separation membranes, and discloses a microporous membrane containing a cross-linked hydrophilic polymer and a preparation method of the microporous membrane, raw materials comprise a microporous membrane main body material and the cross-linked hydrophilic polymer, and the cross-linked hydrophilic polymer is cross-linked polyvinyl acetal; the preparation method comprises the following steps: (1) preparing a membrane preparation solution: adding a microporous membrane main body material, polyvinyl acetal and a non-solvent for membrane preparation into a solvent, and dissolving to obtain the membrane preparation solution; (2) preparing a membrane: preparing the obtained membrane preparation solution into a polymer microporous membrane through a phase inversion process; and (3) cross-linking: soaking the polymer microporous membrane in an aqueous solution of a cross-linking agent, and treating to obtain the microporous membrane containing the cross-linked hydrophilic polymer. The polyvinyl acetal polymer is blended in the polymer membrane material body, and hydroxyl in polyvinyl acetal molecules is crosslinked, so that the hydrophilic stability of the membrane material can be ensured.

The invention discloses an environment-friendly built-in sealant which is prepared from hydroxyl-terminated polydimethylsiloxane, hydrophobic silicon dioxide, vinyltriethoxysilane, butyl titanate, organic bismuth and the like. The invention also relates to a preparation method of the environment-friendly built-in sealant. According to the preparation method of the environment-friendly built-in sealant, the components are put into a reaction kettle in sequence and are fully stirred under the corresponding conditions. According to the method, the cured dealcoholized silicone sealant can be quickly prepared by adding the vinyltriethoxysilane and has a certain tensile strength in a short time, so that the decoration working efficiency and the quality guarantee can be effectively improved in the indoor decoration industry; by creatively adding butyl titanate and a supplemented organic ruthenium catalyst, the butyl titanate serves as a tackifier for improving polymer adhesion, not only provided rapid cross-linking reaction can be, but also the adhesion of a polymer system is improved, and the curing efficiency and the initial tensile strength in a short time can be further improved.

The invention discloses matte top-varnish with a low ratio and low VOC. The matte top-varnish is prepared from a polyurethane top-varnish main agent, a curing agent and a diluting agent according to aconstruction weight ratio of 100:33:70, wherein the polyurethane top-varnish main agent is prepared from the following components in percentage by weight: 60.0 to 70.0 percent of soya oil alkyd resin, 6.5 to 9.8 percent of n-butyl acetate, 2.3 to 3.5 percent of propylene glycol methyl ether acetate, 4.4 to 7.5 percent of xylene, 0.2 to 0.5 percent of dispersing agent, 0.2 to 0.5 percent of defoaming agent, 0.2 to 0.5 percent of flatting agent, 1.9 to 5.5 percent of matte powder, 1.2 to 5.5 percent of wax slurry, and 5.2 to 7.5 percent of nitrocotton solution. The invention also discloses a preparation method of the matte top-varnish with the low ratio and low VOC. The product is used for coating the surface of woodware in a spraying manner, and has the characteristics of low ratio, low VOC, low odor, high pressure resistance, high transparency, high flexibility, good fullness, good flatting performance and good hand feeling and the like.