66 results about "Accelerated curing" patented technology

Catalysts for the accelerated curing of polyisocyanates with polyols, and to polyurethane systems comprising these. The catalysts are used in a two-component coating system based on polyurethanes including (a) polyisocyanates, (b) compounds having groups which are reactive with isocyanates, in water and optionally in the presence of organic solvents or solvent mixtures, (c) one or more compounds of elements of Group VB or Group VIB of the Periodic Table, in which the element in each case has an oxidation state of at least +4, and (d) optionally further additives and auxiliary agents. The coating systems are used in lacquers, paints and adhesives.

A radiation polymerisable composition comprising: (A) a donor/acceptor component for forming a charge transfer complex said component being selected from the group consisting of: (i) a bifunctional compound having an electron donor group and an electron withdrawing group and a polymerisable unsaturated group; (ii) a mixture of (a) at least one unsaturated compound having an electron donor group and a polymerisable unsaturated moiety; and (b) at least one unsaturated compound having an electron acceptor group and a polymerisable unsaturated group; and (B) a Lewis acid.

Despite the excellent properties associated with Magnesium OxyChloride (Sorel) based cements and Magnesium OxySulfate based cements, water and corrosion resistance has been limiting factors for achieving greater commercial applications. Such issues can be addressed by incorporating various alkali metal phosphates, such as Magnesium mono- or dihydrogen phosphate (MgHPO₄ or MgH₂PO₄) with alkali metal fatty acids; such as Magnesium Stearate; and metal or alkali metal sulfates such as Aluminum Sulfate or Magnesium Sulfate. Water resistance is further enhanced by either pre-carbonating the mix water or the liquid magnesium chloride phase of the cements, or by adding a carbonate into the powder phase. Accelerated cure of this system has also been obtained by using various inorganic metal oxides. Additionally, improved corrosion resistance is achieved through the use of certain phosphates, zeolites, nitrites and other novel additives.

The invention relates to a tint high-temperature resistant organic silicon adhesive/sealant, which takes the polysiloxane with the end capped by active functional groups as the foundation, the white carbon soot with the surface going through hydrophobic treatment as reinforcing stuffing, the vapor phase titanium dioxide as a free oxygen consumption agent and the silane coupling agent containing phenyl as a cross linker and combines with proper heat conducting stuffing and catalyst. The silicon adhesive/agent can be solidified at room temperature or rapidly solidified through heating. The product is French grey paste, which allows diversified color matching. The solidified product of the silicon adhesive/agent can endure the temperature as high as 300 DEG C.

One embodiment of the invention provides a spray booth that comprises a spray booth housing having a ceiling and side walls that define an interior for holding an object to be sprayed. A pressurized air plenum is disposed above the ceiling and is adapted to supply air into the interior. A filter media is used to filter air from the plenum before entering into the interior. At least one fan is disposed in the interior below the filter media. The fan is operable to locally increase air flows in the vicinity of the object to increase evaporation rates associated with a spray application on the object, and to enhance air flow over the object during a dry or a cure cycle.

Aqueous solutions of inorganic nitrate salts are used to accelerate the gelling of epoxy gelcoat resins without adversely affecting the glass transition temperature of the finally cured gelcoat. The aqueous accelerants may be used to accelerate gelling of gelcoats that are formed during initial fabrication of composite parts. The aqueous acclerants are also useful for shortening the gel time of gelcoats that are intended for use in repairing damaged structures.

The invention discloses a preparation method of a moisture-curable polyurethane hot melt adhesive. The method comprises the following steps: 1) adding adipic acid polyester polyol, phthalic anhydride polyester polyol, polyoxypropylene ether glycol and an antioxidant into a reaction kettle, uniformly stirring the components, heating the mixture to 120-130 DEG C, and dehydrating the mixture for 2 h under the vacuum degree of less than 100 Pa; (2) cooling the mixture to 75-95 DEG C, adding MDI and a catalyst, and stirring the mixture to carry out a reaction for 2 hours at the temperature of 85-90 DEG C and the vacuum degree of less than 100Pa; 3) adding an auxiliary agent, and quickly stirring the mixture for 30 minutes under the vacuum degree of less than 100 Pa; and 4) rapidly discharging and packaging the product under the protection of nitrogen. According to the PUR prepared through the method, curing is accelerated, meanwhile, the mode that -NCO groups react with water vapor in air for curing is changed, the -NCO groups react with active hydrogen in a latent curing agent, a carbon dioxide product is not generated, meanwhile, due to addition of a combined auxiliary, the product performance is further stabilized, and the service life is prolonged.

The invention discloses a high-density gypsum fiberboard which is prepared from a gelating material, a filling material, recovered waste newspaper, and reinforcing fiber prepared from packaging materials, wherein the gelating material is composed of alpha-semi-hydrated gypsum, beta-semi-hydrated gypsum and cement; and the filling material comprises calcium carbonate particles and inorganic perlite. The invention also discloses a production technique of the high-density gypsum fiberboard, which comprises the following steps: (1) mixing; (2) automatically feeding the mixture into a mold frame; (3) carrying out press molding; (4) stripping; and (5) carrying out multilayer drying tunnel accelerated curing and drying. The technique is mainly characterized in control on mixing raw materials with different particle sizes and modification on the equipment and draining technique; and the gypsum fiberboard prepared by the new formula materials and new technique has higher strength than simply using high-strength alpha-semi-hydrated gypsum, and the cost is obviously lowered.

A method for forming shingles from cellular polyvinyl chloride boards comprising brushing, parting, cutting and coating the boards to desired dimensions and finish. The method comprises passing cellular polyvinyl chloride boards through one or more of a specially designed brushing assembly, cross cut saw assembly, parting assembly, and sizing saw assembly, wherein the assemblies are in-line. The method may further include an in-line, high speed application and accelerated curing of a uniquely formulated solar reflective, ceramic-based finish.

The invention discloses biomass curing-acceleration phenolic resin and a phenolic resin preparation method. Compared with the prior art, the curing-acceleration reagent adopted in the invention is a biomass material with low price; and since a degradable biomass material is introduced into the phenolic resin, the degradation effect of the waste material embedded into soil can be enhanced due to the microbial action; the preparation technology of the phenolic resin is relatively simple, and the adopted curing acceleration reagent is simply added before the use of the phenolic resin, so that the operation is simpler; and the prepared phenolic resin has relatively low curing temperature and relatively short curing time and is suitable for artificial board production and furniture making.

The invention discloses a processing method of a high-performance carbon fiber-reinforced calcium silicate board. The method comprises the following steps of 1 proportioning and pulping, wherein raw materials are separately weighed according to proportions and added into a ball mill, water of which the mass is 5 times that of the raw materials is added, all the materials are ball-milled to be uniform, and a pulp is obtained; 2 blank making, wherein a mold is prepared according to a needed size, and the pulp is injected into the mold for molding; 3 steam curing, wherein the mold injected with the pulp is subjected to an accelerating curing reaction in high temperature and high pressure saturated steam; 4 surface treatment, wherein the surface of the well-prepared fiber-reinforced calcium silicate board is sprayed with a layer of self-cleaning coating before use, and the high-performance carbon fiber-reinforced calcium silicate board is obtained. The processing method of the high-performance carbon fiber-reinforced calcium silicate board has the excellent advantages that the prepared calcium silicate board is fireproof, resistant to moisture, resistant to oil fouling, high in strength and good in tensile property.

The invention relates to a mixed type powder paint and a preparation method thereof. The mixed type powder paint is characterized by comprising 20 to 28 portions of epoxy powder composition and 20 to 80 portions of modified PE powder composition. The preparation method comprises the following steps: epoxy and curing agent are mixed according to the proportion, added with addition agent such as flatting agent, subjected to mixing and extrusion, and granulated; products are crushed by a plastic crusher into micropowder which is screened; components with 180 to 200 meshes are taken to prepare the epoxy powder composition; silane modified PE, curing accelerator, flatting agent and so on are subjected to mixing melt extrusion according to the proportion in a double screw extruder at a temperature of between 150 and 180 DEG C, crushed and screened; and components with 180 to 200 meshes are taken to prepare a crosslinked PE powder composition; the silane modified PE adopts moisture for curing; and the epoxy powder composition and the crosslinked PE powder composition are dispersed and mixed evenly according to a certain proportion to prepare the mixed powder paint, wherein the ratio of the epoxy powder composition to the crosslinked PE powder composition is 20-80 to 80-20. The mixed type powder paint has the advantages that the mixed type powder paint has super strong weather resisting property, has certain compatibility with the epoxy and integration of a surface layer and a bottom layer due to the modification treatment, can be cured by self under natural condition, and can also be steeped into hot water for accelerating the curing.

The invention belongs to the field of corrosion electrochemistry testing, and particularly relates to a corrosion detection electrode in a conductive concrete environment, a preparation method of thecorrosion detection electrode in the conductive concrete environment and a corrosion detection method in the conductive concrete environment. A columnar sample, a hot inlaying layer, an epoxy resin layer, a conductive concrete layer and a wire are all included. In the preparation method, by sample sealing mode of firstly performing hot inlaying and then performing cold inlaying for a test metal, atest surface is enabled to be combined with an inlaying material tightly, a problem that a concrete work electrode is liable to generate gas corrosion in a cement accelerated curing process can be solved, a simple and convenient work electrode preparation method is provided for realizing metal material corrosion electrochemistry detection in the concrete environment, the preparation method not only is suitable for performing corrosion resistance detection for a conductive concrete composite material newly researched and developed on the market, but also can be used for research on electrochemical corrosion mechanism of the metal material in the concrete environment and evaluation on corrosion inhibition performance of an corrosion inhibitor in the internal/external environment of the concrete.

The cure rate of phenol-aldehyde resins is accelerated by conjoint use of a cyclic carbonate cure accelerant and an amine cure accelerant. The cure rate is accelerated still further by addition of a resorcinol source to resin comprising a cyclic carbonate and an amine cure accelerator. Also, cured resins made in accordance with the method.

The disclosure provides a catalyst for use with a benzoxazine resins which imparts accelerated curing at reduced temperatures. The catalyst is selected from elemental halogen or onium polyhalide compounds.

The invention relates to an accelerated curing device for a UV light-cured polymer resin material. The accelerated curing device comprises a curing machine body. A conveying belt is installed at the top end of the curing machine body in an embedded mode; a curing box is fixedly connected with the top end of the curing machine body; a door body is installed on the surface of the curing box; a feeding port is formed in one side of the curing box, and a discharging port is formed in the other side of the curing box; a temperature sensor is fixedly connected with the top end of the inner wall of the curing box; and a PLC panel is fixedly connected with one side of the top end of the curing box, and a buzzer is fixedly connected with the other side of the top end of the curing box. According tothe accelerated curing device for the UV light-cured polymer resin material, under the action of a curing mechanism, through a preset first reset spring, two mounting bases can be driven to relatively move, so that a UV lamp tube can be rapidly mounted or dismounted for replacing; and a threaded rod of a rotary disc can rotate by rotating the rotary disc, so as to drive a mounting plate and the UV lamp tube to ascend and descend, and the distance between the UV lamp tube and a resin raw material can be flexibly adjusted, and the resin raw material is irradiated for rapid curing.

The invention belongs to the technical field of composite pole and tower winding dies, and particularly relates to a composite pole and tower winding die with an accelerated curing effect. The composite pole and tower winding die includes a die body and a heating module, the die body is composed of a bottom part with the large external diameter and a top part with the small external diameter, andthe lower part of the bottom part is connected with a cylinder part consistent with the maximum diameter of the bottom part; and the die body is of a cavity structure with an open bottom, the cylinderpart is internally provided with a blocking ring, a sealing plate is arranged on the blocking ring through a bolt and a sealing gasket, and the heating module is arranged in the cavity structure andfixed through the sealing plate. According to the composite pole and tower winding die with the accelerated curing effect, shortcomings of the prior art are overcome, the heating module is arranged inside the winding die, the curing process is realized by heating the winding die body, that is, winding and curing are conducted at the same time, the curing efficiency is high, and the effect is good.

A cementitious composition with accelerated curing at low temperatures particularly at temperatures <5° C., especially at temperatures <0° C. The cementitious composition consists of 2 components with a first component A including at least one ordinary Portland cement, at least one cement selected from calcium aluminate cement and/or calcium sulfoaluminate cement, a powder P, selected from the group consisting of carbonates or hydrogen carbonates of alkali and/or alkaline earth metals, optionally aggregates, optionally other additives and a second component B comprising at least one accelerator, an anti-freeze agent, water, and optionally other additives. The composition shows increased development of compressive strength, maintain good workability, and have particularly low shrinkage, also when cured at temperatures <5° C., especially <0° C., and as low as −10° C.

The invention discloses a high-efficiency drying device for tea processing, which comprises a bracket with a crossbeam fixing plate in the middle, the top of the bracket is fixed with a baking oven body by bolts, and the oven body is a cavity The barrel-shaped structure, the bottom inner wall of the oven body and the middle part of the lower surface of the beam fixing plate are provided with counterbore holes, and tapered roller bearings are welded in the counterbore holes, and the inner walls of the inner rings of the two tapered roller bearings The same transmission rod is welded, the outer wall of the middle part of the transmission rod is keyed to the first pulley, the upper surface of the beam fixing plate is away from the two sides of the transmission rod, and the motor and the electric heater are respectively fixed by fastening bolts, and the bracket is far away from the transmission rod. One side of the motor is mounted with a controller by screws. The invention enables the semi-dried tea leaves on the stainless steel metal net to be dried in a dynamic posture, which accelerates the drying rate and makes the surface of the tea leaves on each layer have the same drying degree, avoiding uneven drying and even burnt phenomenon .

A prepolymer mixture for preparing a polyurethane elastomer, the mixture comprising an isocyanate terminated prepolymer and a nitrogen-containing organic salt. The nitrogen-containing organic salt may be selected from the group consisting of an ammonium salt, an imidazolium salt, a pyridinium salt, a pyrrolidinium salt, a piperidinium salt, and a morpholinium salt.