65 results about "Wet bonding" patented technology

Water-based adhesive compositions are improved by the incorporation of hollow polymeric microspheres having outer surfaces coated with one or more barrier materials such as calcium carbonate particles. The adhesive compositions exhibit enhanced rheology, sprayability, drying time, tack and storage stability as compared to analogous adhesives that are not modified with coated hollow polymeric microspheres. Such compositions are useful as both contact adhesives as well as wet bonding one-way adhesives.

The invention discloses a high flame retardant polyurethane rigid foam outer wall thermal insulation system. From a basic unit wall provided with a keel and connecting pieces, a prime coat thickening layer, a polyurethane rigid foam layer, an interface layer, and soft tiles, light tiles or a reflective coating are arranged in turn. In the system, the prime coat thickening layer has high adhesion and good wet bonding strength for the basic unit wall and the polyurethane rigid foam; and the high flame retardant polyurethane rigid foam outer wall thermal insulation system is foamed by pure water, and is halogen-free, flame retardant, safe and environment-friendly. The vertical face of the wall is successfully foamed on site, and the polyurethane rigid foam can be directly sprayed and foamed on the basic unit wall which is treated by the prime coat thickening layer, can reach high adhesion to the basic unit wall after 24 to 48 hours, and has the coefficient of thermal conductivity of less than 0.03W/(m.K), the vertical burning reaching V-0 level, and the water absorption of less than 2.5 percent.

The invention provides a preparation method of polyurethane modified epoxy resin. The preparation method comprises the following steps: firstly performing reaction on isocyanate and a hydroxyl group on epoxy resin to obtain polyurethane graft epoxy resin, further terminating isocyanate on the polyurethane graft epoxy resin with monohydric alcohol, and further grafting a polyurethane short branch chain on the epoxy resin by utilizing the unit termination of isocyanate so as to increase the intermolecular distance of the epoxy resin, reduce the intermolecular action force, improve the motion ability of a chain segment and simultaneously realize the effects of reducing viscosity of slurry and toughening; furthermore, a grouting material based on the polyurethane modified epoxy resin provided by the invention can effectively reduce the intermolecular physical crosslinking and realize strong permeability and good toughness; data shows that the compressive strength exceeds 70MPa, the tensile strength is more than 20MPa, the dry bonding strength is more than 5MPa, and the wet bonding strength is more than 3MPa.

The invention provides a foaming-free fast-curing high-strength leak-stopping waterproof polyurethane grouting material. The material is composed of a component A and a component B, wherein the component A comprises isocyanate monomer, isocyanate prepolymer and highly-hydrophobic environment-friendly plasticizer, the component B comprises high-activity polyether polyol, chain-extending cross-linking agent, highly-hydrophobic environment-friendly plasticizer and antioxidant, and a volume ratio of the component A to the component B is 1: 1. The leak-stopping waterproof polyurethane grouting material has low viscosity, is convenient to grout, has the characteristics of no foaming and fast curing and the advantages of good leak-stopping effect, high mechanical strength and wet bonding strength and excellent aging resistance, and is applicable to rapid leak stopping, water prevention and reinforcement of distress in concrete of an underground construction.

The invention discloses a wet bonding resistant alcohol soluble self-bonded paint and a preparation method thereof. According to the preparation method, p-cresol, dimethylbenzene and butanol are taken as a mixed solvent, ES-08, IC alcohol-soluble nylon and epoxy resin are taken as the main raw materials, and a lubricant is taken as an addition agent. The alcohol-soluble nylon is added into equipment and is dissolved by the mixed solvent into an intermediate semi-finished product, and the epoxy resin and a certain proportion of lubricant are added for modification and reaction so as to obtain the product. As the epoxy resin with high molecular weight, high softening point and good humidity resistance is taken as the cooperative modified resin of the alcohol-soluble nylon, and a proper proportion of a lubricant and the mixed solvent with gradually steady evaporation property are added for cooperation, so that the wet bonding resistance of the enameled wire self-bonded paint is greatly improved; the prepared product has good homogeneity and storage stability; and chemical components of low chemical activity are adopted for cooperation, so that the production requirement of the product in production process is lowered, and the property of the product is more stable.

The invention discloses a wood adhesive, in the technical scheme, konjac glucomannan and chitosan which serve as main raw materials, glacial acetic acid which serves as catalyst, polyvinyl alcohol which serves as modifier and pure water which serves as solvent are mixed and react at 25 to 90DEG C to prepare the wood adhesive. The invention has the advantages of wide sources of the three raw materials, high bonding strength, lower cost and no pollution. The natural polymer-based wood adhesive prepared by the invention is applied to the bonding of poplar veneer, the average value of the dry bonding strength is 4.01MPa, the average value of the wet bonding strength is 2.88MPa, and the dry and the wet strength reaches the values of national standard requirements.

The invention provides antimagnetic plasterboard applicable to high-humidity environments. The antimagnetic plasterboard is mainly prepared from the raw materials, i.e., coir fibers, a foamer, plaster clinker, graphene oxide, a humectant and causticized white clay. According to the antimagnetic plasterboard applicable to the high-humidity environments, the coir fibers and the causticized white clay are added on the basis of the conventional plaster clinker and foamer, so that the waterproof performance of the plasterboard is improved, and a very good wetted bonding effect can be achieved without adding additives such as CMC powder; by adding the graphene oxide, the strength of the plasterboard can be further improved; in order to improve the dispersion effect in the entire system, the humectant is required to be added, and proven by a large number of experiments, a very good dispersion effect can be achieved through adding a small amount of humectant Hyonic PE-100; after basalt fibers are added, the plasterboard has a very good screening effect on electromagnetic waves with the frequency band of 8GHz to 16GHz. The antimagnetic plasterboard applicable to the high-humidity environments, provided by the invention, is low in cost and high in strength, particularly, has very good bonding strength in the high-humidity environments and is free of powder falling in long-term use, and the electromagnetic screening effect is good.

The invention provides a dentin reactive monomer mixture and a preparing method, a polycarboxylic oligomer and a preparing method, and dental composite resin bonding systems, wherein the dentin reactive monomer mixture and the polycarboxylic oligomer are used for constructing the dental composite resin bonding systems. The invention further provides a single-component dental composite resin bonding systems and a double-component dental composite resin bonding system. The bonding systems overcome the defect that due to the fact that a large number of hydrophilic monomers are introduced into a traditional wet bonding technique, cured resin can be easily degraded by esterase in saliva as the water absorption rate is increased remarkably.

A multi-layer thin-film narrow-band filter is fabricated by a process wherein each half of a symmetric stack is deposited under exact conditions, either successively or contemporaneously. The two halves of the filter structure are then combined and bonded together using a wet bonding process that remains reversible for a period of time sufficient for testing the filter and, if necessary, for separating the two halves to regain access to the spacer layer. Accordingly, the spacer layer may be adjusted to shift the peak wavelength, if necessary, to the precise design specifications for a particular application. After correction, the components of the symmetric filter are bonded again using the same wet process.

The invention discloses a hyperbranched polyamide modified tannin adhesive. The hyperbranched polyamide modified tannin adhesive comprises a hyperbranched polyamide solid and tannin powder, wherein the content of the hyperbranched polyamide is 1-6%wt of the content of tannin. The invention also discloses hyperbranched polyamide modified tannin adhesive based plywood, a preparation method of the hyperbranched polyamide modified tannin adhesive, and application of the hyperbranched polyamide modified tannin adhesive in preparation of the plywood. The hyperbranched polyamide modified tannin adhesive provided by the invention utilizes a hyperbranched polymer with a lot of active functional groups as a crosslinking agent to improve the cross-linking degree and polycondensation degree between tannin molecules, thus reaching the purpose of improving the bonding strength and water resistance. Compared with the unmodified adhesive, the hyperbranched polyamide modified tannin adhesive has the advantages that the dry bonding strength is increased by 27% or above, and the wet bonding strength is increased by 33% or above.

The invention relates to a grouting material for reinforcing and strengthening concrete used underwater. The grouting material for reinforcing and strengthening the concrete used underwater is mainly prepared from the following components: 100 parts of epoxy resin, 20-40 parts of diluent and 40-50 parts of a phenolic amine curing agent, wherein the epoxy resin is self-emulsification modified waterborne epoxy resin with the characteristics of a surfactant. The grouting material for reinforcing and strengthening the concrete used underwater has the advantages that compressive strength 7 days after maintenance can reach up to 45.6MPa, wet bonding strength of epoxy mortar and concrete can reach up to 4.08MPa, and the grouting material for reinforcing and strengthening the concrete used underwater is applicable to repairing of the concrete used underwater, can be used for repairing and reinforcing the concrete used underwater and is especially applicable to repairing and reinforcing of an underwater pier column.

The invention discloses a preparation method and a use method of a cross-linked hyperbranched amine-modified oxidized starch adhesive for laminated wood and relates to a starch adhesive applied to thelaminated wood and a use method thereof. The preparation method and the use method of the cross-linked hyperbranched amine-modified oxidized starch adhesive for the laminated wood aim to solve the technical problems that the existing starch adhesive is relatively low in wet bonding strength and is not resistant to water. The preparation method comprises the following steps of I, preparing an oxidized starch adhesive; II, preparing a hyperbranched amine aqueous solution; III, preparing an oxidized starch grafted with trimesoyl chloride; and IV, preparing the cross-linked hyperbranched amine-modified oxidized starch adhesive. The cross-linked hyperbranched amine modified oxidized starch adhesive is uniformly smeared on the inner surface of a surface plate and two surfaces of a core plate byusing a brush, then the surface plate and the core plate are laminated to form a multilayer plate blank, and hot pressing is performed on the multilayer plate blank to finally obtain the multiply plywood. According to the preparation method and the use method of the cross-linked hyperbranched amine-modified oxidized starch adhesive for the laminated wood disclosed by the invention, hyperbranchedamine modification is performed on the oxidized starch adhesive, and then the laminated wood is prepared, the water resistance and the bonding property are improved, the corrosion effect of wood-inhabiting fungi on the laminated wood is inhibited and the service life is prolonged.

The invention relates to an aldehyde free soybean protein adhesive having a multiple network structure. The adhesive comprises following components in parts by weight: 15 to 18 parts of a main agent,85 to 88 parts of a dispersing medium (water), 0.05 to 0.1 part of bromelain, 2 to 3 parts of tannic acid (TA), 0.25 to 0.5 part of zinc sulfate heptahydrate, and 2 to 4 parts of a crosslinking agentnamely 1,2,3-glyceroldiglycidyl ether (PTGE). The adhesive has a triple network structure, has the advantages of proper viscosity, high dry/wet bonding strength, good toughness, good mildew resistantproperty, and can be evenly painted; the performance is stable, and the product quality is stably improved. The invention further relates to a preparation method of the adhesive.

The invention provides an anti-humidity and sticking cyclone separator, which comprises an inverted cone-shaped cylinder, an upper air inlet is arranged on the inverted cone-shaped cylinder, and the inverted cone-shaped cylinder has two layers of anti-sticking coatings and the The heating layer sandwiched between the two layers of anti-sticking coatings, the heating layer is equipped with electric heating wires, and also includes a heating device for controlling the operation of the electric heating wires. By setting the heating layer on the inverted cone-shaped cylinder, the inverted cone is further dried. The residual material on the shaped cylinder prevents wet sticking and facilitates the separation of the material from the cyclone separator. The invention has a simple structure and obvious effect, and can further improve the drying degree of the material, which serves multiple purposes.

The invention belongs to the technical field of a concrete structure, and particularly relates to an FRP (fiber reinforced plastic) sectional material-concrete combined structure adopting a novel combined interface. The structure comprises an FRP sectional material template, an FRC shear key, an interface resin layer and concrete, wherein the FRP shear key is arranged on the surface of the FRP sectional material template, the concrete is directly cast on the surface of the FRP sectional material template, and the interface resin layer is arranged among the cast-in-place concrete, the surface of the FRP sectional material template and the FRP shear key. The FRP sectional material-concrete combined structure adopting the novel combined interface provided by the invention has the advantages that the preparing process is simple and convenient, the operation is easy, meanwhile, higher designability is realized, the technical advantages of the existing wet bonding and steel screw bolt shear key are combined, the technical effect is more excellent, the technical defects that the FRP sectional materials and the concrete can easily peel and fall, the steel screw bolt shear key can easily get rusty and the perforation damage to the FRP sectional material can be easily caused can be more effectively overcome, and the popularization and the application of the FRP sectional material-concrete combined structure are favorably realized.

The invention discloses novel molding sand. The novel molding sand is prepared from, by weight, 120-140 parts of quartz sand, 25-30 parts of bentonite, 10-15 parts of zeolite powder, 5-8 parts of gypsum powder, 2-3 parts of Chinese medicine residues, 1-2 parts of carbon powder, 3-4 parts of modified starch, 15-20 parts of aluminum oxide and 3-5 parts of vitrified microspheres. The novel molding sand is good in breathability, liquidity and high-temperature collapsibility. A sand mold is high in dry strength, high in wet bonding power, and good in anti-adhesive sand capacity, so that machined castings are smooth and glossy in surface, and high in finished product rate. Besides, the novel molding sand is capable of improving the operating environment of personnel, reusing waste and being good for the environment.

The present invention relates to a method for manufacturing a paper straw, the method comprising: a paper roll transmission step, a paper strip heating step, a bonding and shaping step and a cutting step. Wherein, a plurality of raw paper rolls face a connection position jointly to transmit a raw paper strip, the raw paper strip includes a paper material and a dry hot-melt adhesive. The dry hot-melt adhesive of the raw paper rolls is heated for changing into flow hot-melt adhesive. Then the raw paper rolls is transmitted to the connection position for rolling jointly, and the flow hot-melt adhesives are bounded on another raw paper strip to form a pipe. Finally, the pipe is cut to form at least one paper straw after the pipe exceeds a setting length. The present invention uses dry adhesive to manufacture paper straw, without the excessive glue problem and mold phenomenon of the traditional wet bonding method as well as without an extra dry fixing step of traditional manufacture process, so the productivity will be raised significantly, and the defect rate will be reduced.

The invention discloses a grouting material, and a preparation method and application thereof, and belongs to the technical field of building materials. The grouting material comprises a component A and a component B; the component A is prepared from the raw materials: an epoxy matrix and a reactive diluent; the reactive diluent is at least two of butanediol glycidyl ether, allyl glycidyl ether and butyl glycidyl ether; the component B is prepared from the raw materials: a curing agent, a curing regulator, a coupling agent and a diluent; and the mass ratio of the component A to the component B is 100:(35-60). Due to the synergistic effect of all the components, the grouting material has the following advantages that the initial viscosity is low, the operable time is long, and the dry and wet bonding performance is excellent.

The invention aims to provide a manufacturing method of natural polymer gel artificial muscle assembled through wet bonding. The method mainly comprises the following three steps of: 1, preparing a natural polymer electric driving film formed by crosslinking sodium carboxymethyl cellulose and carboxylated chitosan; 2, preparing an electrode film formed by crosslinking sodium carboxymethyl cellulose and a multi-walled carbon nanotube dispersion liquid; and 3, assembling the electrode film and the natural polymer electric driving film in a sandwich structure by adopting a wet bonding method. The two materials used in the method of the invention are natural polymer materials, have good biodegradability and biocompatibility, are green and environment-friendly, and are low in price. Moreover, hot press equipment is not used in the preparation process, so that the cost is greatly reduced, the process difficulty is simplified, and the carbon emission is reduced.