155results about How to "Fast curing time" patented technology

A 2K epoxy adhesive is provided that has rapid cure time and good strength characteristics. Both the epoxy resin composition and the hardener composition of the 2K epoxy comprise a reactive toughener. Such adhesives are useful in the manufacture and/or repair of large machinery (e.g., automobiles), and are useful for bonding like or unlike materials, such as metal and composites (e.g., carbon fiber or glass fiber composites).

An intumescent composition which comprises a polymer selected from a silane-terminated polyurethane or a silane-terminated polyether, a plasticizer that is compatible with the polymer and an intumescent ingredient. Processes of forming a cured intumescent substance, and methods of fire protecting a building are also provided.

Epoxy composites are prepared by separately preheating an epoxy resin and a hardener; mixing the preheated epoxy resin and preheated hardener to form a hot reaction mixture and curing the hot reaction mixture in the presence of a reinforcement until the mixture cures to form a composite having a polymer phase with a glass transition temperature of at least 150° C.

The invention discloses a method for preparing silicone sealant. The method comprises the following steps: adding alpha,omega-dyhydroxy polydimethylsiloxane, filler and dimethyl silicon oil into a vacuum kneading machine, vacuuming, heating and mixing for 2-5 hours; stopping heating, introducing nitrogen to change the vacuum state, adding a silane coupling agent, mixing for 0.5-1 hour at the vacuum degree of -0.06 to -0.1Mpa, introducing nitrogen to change the vacuum state; sealing and cooling to room temperature, subsequently transferring into a stirring machine, adding a cross-linking agent, a thickening agent and a catalyst, vacuuming, and uniformly stirring and mixing so as to obtain the silicone sealant. According to a product of the silicone sealant, the addition amount of the filler is increased, the product stability and the surface smoothness are improved, the thixotropy and the deep curing are also improved, the curing homogeneity is good, the tensile strength, the elasticity and the cohesiveness are greatly improved, expensive white carbon black can be replaced, the filling amount is large, the curing time is short, the construction efficiency is improved, the process is simple and feasible, the production cost is low, and good economic benefits and social benefits are achieved.

A photocurable ink contains a colorant dissolved or dispersed within a solvent, a photoinitiator, an organic phosphite, and a photocurable compound. This photocurable ink can be used for imaging or other applications where a uniform or patterned image is desired. The photocurable ink can be cured partially before application, or totally cured after application.

Select metal salts of mono and di aromatic sulfonic acids and aliphatic sulfonic acids are effective latent acid catalysts in coating compositions capable of acid catalyzed crosslinking and provide coating compositions with lower cure temperature and quicker cure times than encountered with conventional sulfonic acid catalysts, have excellent storage stability and avoid drawbacks of epoxy and amine blocked sulfonic acid catalysts.

The invention provides a preparation method of a polyurethane elastomer, relating to polymers. The invention provides a preparation method of a polyurethane elastomer which has excellent impact resistance and machining characteristic and is especially suitable for preparing transparent polyurethane glasses frame products with high yields and low defects. The preparation method comprises the following steps: 1) preparing a prepolymer: mixing isocyanate with polyols to react to obtain the prepolymer; 2) preparing a curing agent: specifically, dehydrating the polyols, catalysts and anti-aging agents until the mass percent of the moisture is smaller than 0.05%, and adding chain extenders after reducing the temperature, thus obtaining the curing agent; and 3) mixing the prepolymer with the curing agent, then carrying out vacuum defoaming, injecting a reactive mixture after vacuum defoaming into a mold, then putting the mold in a microwave environment to be heated, and carrying out demolding, thus obtaining the polyurethane elastomer. The preparation method has the advantages of good processing properties, low material operating temperature, controllable operating time, high production efficiency and high yield.

A process for grouting floors using a two-part reactive epoxy grout formulation comprising two distinct components (parts) which can utilize a two-part cartridge for storing, metering and having a means of attaching a static mixer tube to the front of the cartridge for inline mixing of the epoxy components as they are being dispensed directly into the grout joint. The cartridge contains a resin and pre-colored hardener, which maybe heated to accelerate the cure speed in cold environments if necessary, mixed, and applied to an empty grout joint-line by means of a static mixer tube that acts as a mixer-nozzle. Masking tape or other protective material is placed on both sides of the joint-line prior to grouting to prevent epoxy contacting tile faces. The grout is dispensed directly into the grout joint by the applicator gun pressurizing the cartridge pistons to flow epoxy resin and hardener in the correct mix ratio through the static mixing nozzle. A leveling tool is used to even out the dispensed grout into the grout joint and remove excess material before curing. By means of the reactivity of the hardener and resin, which are mixed in the proper stoichiometric ratios, the epoxy will cure in the designed period of time to allow full use within hours after application. A two-part methyl methacrylate grout formulation can be used in grouting new tiled floors or regrouting existing tiled floors with the same procedures as the two part reactive epoxy grout.

Method of bonding a shear web (50) to a wind turbine blade shell (75) and the obtained blade, wherein the shear web (50) comprises a web and a mounting flange (56) oriented transverse to the web (50). The method involves: providing a seal (66, 68) on the mounting flange (56) of the shear web (50) such that when the mounting flange (56) is positioned against the blade shell (75), a cavity (76) is defined by the seal between the mounting flange (56) and the blade shell (75). The air of the cavity (76) is then evacuated and adhesive is injected into the cavity (76). The use of pieces (80) to keep the distance between the mounting flange (56) and the blade shell (75) is preferred.

Disclosed is a floor structure comprising: an upper surface arranged in parallel to a lower surface; and one or more channels disposed vertically between upper and lower surfaces and longitudinally extending along the upper and lower surfaces, each of the one or more channels having a top and a bottom.

The invention provides a combined foaming agent. The combined foaming agent comprises, by mass, 1-9 parts of cyclopentane, 1-5 parts of isopentane and 2-30 parts of HFC-245fa. The hard polyurethane foam prepared by adopting the combined foaming agent comprises, by mass, 100 parts of combined polyether, 10-26 parts of the combined foaming agent and 120-150 parts of isocyanate. The invention also provides a manufacturing method of the hard polyurethane foam. The above foaming technology effectively reduces the heat conduction coefficient of the polyurethane foam, and reduces the energy consumption of a freezer; the strength of the foam with same density is enhanced, and the density of the foam required by the freezer is reduced, so the injection amount of the whole freezer is reduced, the raw material waste is reduced when the demand of the freezer is a certain amount, production of the hard polyurethane foam difficult to treat is reduced, and pollution to environment is reduced; and the solidification time of the foam is shortened by 10-15%, and the production efficiency is improved.

The invention discloses a preparation method of a one-component oxime transparent silicone adhesive. According to the preparation method, white oil is divided into two parts for feeding. One part of the white oil firstly reacts with alpha, omega-dihydroxy polydimethylsiloxane. Thus, viscosity of base rubber can be appropriately reduced; severe wearing of equipment can be avoided; the resistance of the product will not be greatly reduced after the addition of gas-phase silica; and the gas phase silica powder can be dispersed uniformly. The other part is added after the reaction so as to make the product appearance more uniform, smoother and more exquisite. In the meanwhile, the curing time of the product is obviously accelerated, thus substantially minimizing construction time and raising construction efficiency.

The invention discloses a high temperature resistant polyurethane complex adhesive, which belongs to the technical field of complex adhesives. The high temperature resistant polyurethane complex adhesive comprises the following substances by weight: 160 parts of methylbenzene, 150 parts of dimethyl carbonate, 587.5 parts of aromatic polyester polyol, 30 parts of polyphthalate polyol ester, 1.63 parts of trimethylolpropane, 65 parts of methylbenzene-2,4-diisocyanate, 1.5 parts of catalyst CAT S102, 1.2 parts of 1,4-butanediol, 1.2 parts of 1,3-butanediol, 0.15 part of antioxidant and 3.02 parts of organic bismuth. The complex adhesive, provided by the invention, has the advantages of large binding strength, strong high temperature resistance, short curing time of chemical curing, and capability of saving energy, optimizing environment and reaching standards of export products of European Union.