65 results about "Cure time" patented technology

The invention provides a toughened curing-controllable prepreg and a preparation method thereof, and belongs to the technical field of high-performance composite materials. Comprising the following components in parts by mass: 100 parts of epoxy resin, 100 parts of a thermoplastic resin toughening agent, 100 parts of an inorganic nanoparticle toughening agent, 100 parts of a latent curing agent, 100 parts of an organic urea accelerant, 100 parts of an imidazole accelerant and 100 parts of a reactive diluent, correspondingly, 1-5 parts by mass of a thermoplastic resin flexibilizer, 0-3 parts by mass of an inorganic nanoparticle flexibilizer, 4-8 parts by mass of a latent curing agent, 1-4 parts by mass of an organic urea accelerator, 0.1-0.5 part by mass of an imidazole accelerator and 5-20 parts by mass of an active diluent are added. The prepreg provided by the invention not only is endowed with fast curing and controllable curing time, but also is endowed with relatively long room-temperature storage period, high toughness and good impact resistance, and is especially suitable for the fields of low-altitude aircrafts, automobiles, ships and the like.

The invention relates to the technical field of composite material preparation, and discloses a vacuum infusion epoxy resin system which comprises the following components in parts by weight: 50-80 parts of epoxy resin, 10-30 parts of a curing agent, 1-5 parts of an accelerant, 5-15 parts of a flexibilizer, 10-20 parts of filler, 1-3 parts of a coupling agent, 5-10 parts of a diluent, 0.1-1 part of a defoaming agent, 0.5-2 parts of an antioxidant and 0.5-2 parts of a light stabilizer. Low-temperature rapid curing is achieved through the synergistic effect of the modified aromatic amine curing agent and the accelerant, the carboxyl-terminated nitrile rubber toughening agent and the filler form a synergistic toughening system to improve the mechanical property, and the hydrogenated bisphenol A epoxy resin is matched with the light stabilizer and the antioxidant to enhance the weather resistance and the high temperature resistance. The system can be used for preparing composite materials in the fields of wind power generation blades, ships, aerospace and the like, fiber reinforced materials are infiltrated by adopting a vacuum infusion forming process and then are cured and formed, and the problems that an existing resin system is long in curing time and insufficient in mechanical property and weather resistance are solved.

The invention discloses a formaldehyde-free vegetable glue, the formaldehyde-free vegetable glue is a two-component polystyrene foam, the two-component polystyrene foam comprises a glue body and a curing component, and the foaming rate of the formaldehyde-free vegetable glue is 40-80%. The formaldehyde-free vegetable gum prepared by the invention can prolong the operable time, has long development time before hot pressing, and has short curing time after hot pressing. The weight ratio of water to isocyanate in the raw materials is 0.1996: 25, the gel reaction and foaming reaction of the polystyrene foam can be balanced, foaming is uniform, and meanwhile the strength of the board is not affected. In addition, foam holes formed after foaming of the polystyrene foam are uniform small pores, so that the strength of an adhesive layer is improved, and the bonding strength is improved. In the bonding of the sandwich structure of the plate, the bonding strength is high, and the colloid is not easy to damage during stripping.

The invention provides a sheet molding compound resin composite material and a preparation method thereof. The resin composite material comprises the following components in parts by weight: 60-70 parts of unsaturated resin; 30-40 parts by weight of a low shrinkage agent; 0.5-1.5 parts by weight of a curing agent; 0.3-1 part by weight of a polymerization inhibitor; 0.2-1 part by weight of a wetting dispersant; 2-6 parts by weight of an internal release agent; 140-180 parts by weight of an inorganic composite filler; 15-35 parts by weight of zeolite powder; 120 to 150 parts by weight of glass fiber; 2-6 parts by weight of a thickening agent; and 1-2 parts by weight of a deodorant. Through the synergistic effect of the zeolite powder and the deodorant, the peculiar smell of the SMC resin composite material is further reduced, and meanwhile the basic mechanical property of the composite material is kept. According to the preparation method, by regulating and controlling the curing temperature and the curing time, the curing rate of the sheet molding compound resin composite material is increased, and the generation of residual peculiar smell substances which are not completely reacted is reduced.

The invention relates to the technical field of fireproof coatings, in particular to a fireproof coating capable of being rapidly cured in a high-humidity environment and a preparation method of the fireproof coating. Comprising the following raw materials in percentage by mass: 5-20% of film-forming resin, 4-15% of a dispersing solvent, 5-25% of a plasticizer, 0.05-2% of a coupling agent, 30-70% of an expansion system, 5-20% of an inorganic filler and 0.4-2% of reinforced fibers. The fireproof coating provided by the invention is short in curing time, can still be cured especially in a high-humidity environment, can be applied to rainy regions in rainy seasons, is high in curing speed, and avoids influence on construction progress due to rainy seasons; and meanwhile, the cured coating has excellent water resistance, does not blister or fall off within 7 days, does not need to be coated with finish paint in the use process, reduces the construction procedures and saves the cost.

The invention provides a method for estimating thermal expansion molding process parameters of a foam sandwich composite material, the foam sandwich composite material and a preparation method of the foam sandwich composite material. The estimation method comprises the following steps: testing an expansion pressure-time relation curve of the expandable foam rubber under the conditions of different temperatures and different expansion rates, and when the maximum value of the expansion pressure exceeds 100 kPa, recording a corresponding expansion rate range and a temperature range; testing a viscosity-curing time relation curve of resin in the prepreg at different temperatures, and recording a corresponding temperature range when the curing time does not exceed 10 minutes and the viscosity is not lower than 100 Pa.s; and taking the overlapped part of the recorded temperature range of the expandable foam rubber and the recorded temperature range of the resin as an estimated temperature range of thermal expansion mold pressing, and taking the recorded expansion rate range as an estimated expansion rate range of a thermal expansion mold pressing process. According to the estimation method, the production process stability of the sandwich composite material is improved.

The thermosetting resin composition contains an epoxy resin containing an epoxy compound represented by formula (1), a curing agent, and an inorganic filler. The glass transition temperature of a thermosetting resin composition in which m is 2 and n is 2 in formula (1), measured at a heating rate of 5°C / min using thermomechanical analysis (TMA), is 190°C or more, and the die shear strength of the thermosetting resin composition to copper at 230°C, measured by the following <Procedure>, is 3.0 MPa or more. <Procedure> The thermosetting resin composition is molded using a low-pressure transfer molding machine at a mold temperature of 175° C, an injection pressure of 10 MPa, and a curing time of 120 seconds, and four 10 mm2 test pieces per level are molded on a copper lead frame. Subsequently, the die shear strength between the test piece and the copper lead frame is measured at 230°C using an automatic die shear measuring device. The die shear strength of the four test pieces is adopted.

The invention discloses an efficient production process for environment-friendly resin crafts. The efficient production process for the environment-friendly resin crafts comprises the following steps: S1, filler treatment; s2, preparing a resin system; s3, mold treatment is conducted, specifically, a mold is sprayed with a semi-permanent mold release agent, a mold release agent film layer with the preset thickness is obtained, and the temperature of the mold is preset to 40 DEG C; s4, automatic pouring is conducted, specifically, the pouring curing temperature, pressure and curing time are set as follows: in the gel stage, curing is conducted for 30-60 min at the temperature of 35-40 DEG C and the pressure of 0.3 MPa, so that exhausting is completed, and bubbles of a resin system are reduced; in the main curing stage, curing is performed at 65-70 DEG C and normal pressure for 1-2 hours, so that the crosslinking reaction is accelerated; in the post-curing stage, curing is conducted for 30 min at the temperature of 50 DEG C and the normal pressure, so that internal stress S5, automatic demolding; and S6, finish machining is conducted on the crude product of the environment-friendly resin artware. According to the efficient production process of the environment-friendly resin artware, the curing efficiency of a resin system is enhanced by adjusting temperature control in the pouring process.

Curable resin compositions having extended open times at ambient temperatures and short cure times at high temperatures are prepared using a curable resin curable by one or more liquid organic peroxides or blends thereof and an accelerator / activator accelerator comprising a metal salt and a thiol-functionalized organic compound.

The invention discloses a high-speed bonding hot melt adhesive containing OPE wax as well as a preparation method and application of the high-speed bonding hot melt adhesive. The hot melt adhesive comprises the following components in percentage by weight: 10-25% of a main polymer; 40%-60% of tackifying resin; 10%-25% of white mineral oil; 5%-10% of a processing aid; 0.4% to 0.8% of an antioxidant 1010:; 0.1% to 0.3% of an antioxidant 412S; and 5%-25% of OPE wax. The preparation method of the hot melt adhesive comprises the following steps: mixing all the components, vacuumizing, heating and stirring until the materials are completely molten, stopping stirring, and vacuumizing and defoaming. The hot melt adhesive has the advantages of high bonding strength, good antioxidant effect, low viscosity, short curing time and the like, is suitable for non-polar base materials, can meet the production requirements of high-speed production lines, and is simple in preparation method, low in production cost and suitable for large-scale industrial production and application.

The present application relates to the technical field of composite material forming, and particularly relates to a protection treatment method before filling of a core mold of a metal framework with a complex structure. The treatment method comprises the following steps: S100, preparation; S200, preparation of silicone rubber; S300, coating of the filling silicone rubber; S400, filling of the core mold, machining and composite material forming; and S500, completion of product preparation, removal of the core mold and finished product silicone rubber. The treatment method has the advantages of simplifying the operation process, reducing the operation difficulty, improving the labor efficiency, shortening the curing time, making the coating uniform and complete, shortening the protection time of the whole framework, being suitable for the wide temperature range post-curing process requirement, effectively buffering and eliminating the damage of the removal tool to the metal framework, avoiding the resin from entering the hollow hole and the part with a rib plate included angle during the resin pouring process, reducing the difficulty of the core mold removal and the framework cleaning in the later period, and being easier to clean and remove without residue.

The invention discloses an epoxy resin four-stage curing process optimization method based on multi-temperature gradient and epoxy resin. The optimization method comprises the following steps: S1, determining a four-stage curing temperature platform and heating buffer time; and S2, optimizing the curing temperature X1 and the curing time X2 of the four stages based on a response surface method, regulating and controlling the curing rate under each temperature platform to be always in a set dynamic equilibrium interval, performing quadratic polynomial regression modeling according to the curing temperature X1, the curing time X2, the maximum curing rate Y1 and the minimum curing rate Y2, and determining optimal four-stage curing process parameters. When the epoxy resin is prepared by using the optimization method, the problems of residual stress concentration, microcracks, warping and the like caused by large temperature difference and non-uniform curing rate in a traditional two-stage curing process can be solved, and staged release of residual stress and effective improvement of curing uniformity can be realized; therefore, the balance between epoxy resin curing uniformity and production efficiency is realized.

The invention discloses a preparation method of elastic resin clay, and relates to the technical field of resin clay processing, the elastic resin clay comprises formula materials and a preparation method, the formula materials comprise a master batch, a plasticizer, calcium carbonate, a preservative, an anti-aging agent, a coloring agent, white carbon black and others, the material proportion comprises 100 parts of master batch, 20-40 parts of plasticizer, 20 parts of calcium carbonate, 1 part of preservative, 2 parts of anti-aging agent, 0.05 part of coloring agent and 5 parts of white carbon black, preliminary curing is carried out in a room temperature or low temperature oven, the time is determined according to the type and thickness of resin, the resin is taken out and placed after being dried, curing is carried out again after standing for 1 hour, final standing is carried out after secondary curing is completed, and the finished product is obtained. And finally, carrying out surface treatment, such as grinding, polishing or coating treatment, according to requirements so as to improve the appearance and the hand feeling. Through the steps, a novel elastic resin clay processing technology can be designed, and a high-performance and multi-purpose elastic resin clay product can be produced.

The invention provides a curing prediction method of a wood prepreg, a preparation method of a wood recombination material and the wood recombination material. The method comprises the following steps: at different curing temperatures, measuring the curing degrees of a resin material at different curing times; obtaining a curing conversion rate curved surface; the method comprises the following steps: impregnating a wood unit by using a resin material, and drying to obtain a wood prepreg; on the basis of the curing conversion rate curved surface, curing time and curing temperature of the wood prepreg corresponding to different curing degrees are obtained, hot pressing treatment is conducted on the wood prepreg on the basis of the curing time and the curing temperature, and forming bodies with different curing degrees are obtained; measuring the physical and mechanical properties of each formed body; carrying out nonlinear relation fitting on the curing degree and the physical and mechanical properties of the molded body to obtain a relation curve; and providing a to-be-tested wood prepreg, obtaining a curing degree target value based on the physical and mechanical property target value, and obtaining optimized hot pressing process conditions of the to-be-tested wood prepreg based on the curing conversion rate curved surface.

The present invention relates to a method for preparing thick composite laminated timber, comprising the following steps: S100, preparing a blank; S200, forming a finished product, wherein forming the finished product specifically comprises: S210, treating a bonding surface of the blank, and S220, preparing an adhesive, the adhesive comprising 100 parts by weight of an epoxy resin, 25-70 parts by weight of a curing agent, 10-30 parts by weight of a toughening agent, and 0.5-5 parts by weight of a coupling agent, and uniformly mixing said components in proportion; S230, uniformly coating the bonding surface with the adhesive, wherein the adhesive is coated in an amount of 200-1000 g / m2; S240, curing the adhesive; and S300, performing molding. The method for preparing thick composite laminated timber has the advantages that a plurality of prepreg layers are molded to form thin blanks, and then the plurality of blanks are formed into the thick composite laminated timber by means of adhesive curing; thus, the product curing time is shortened, the production efficiency is improved, the product appearance quality and mechanical strength are not affected, and the occurrence of core burning is avoided.

Curable resin compositions having extended open limes al ambient temperatures find short cure times at elevated temperatures are prepared using a curable resin winch is curable with one or more liquid organic peroxides or a blend thereof and an accelerator / activator promoter comprising a metal salt and a thiol-functionalized organic compound.

To provide a polyurea resin composition production raw material which enables production of a coating material that has curing time suitable for hand coating and is excellent in sagging resistance and defoaming resistance of a coating film, and enables formation of a cured product that is excellent in adhesion to a base material, and a polyurea resin composition.SOLUTION: A polyurea resin composition production raw material contains a component (A) containing a polyisocyanate compound (a), and a component (B) containing a polyamine compound (b), and satisfies all the following conditions (1) to (4). (1) Residual viscosity after 30 seconds from mixing of all the components including the component (A) and the component (B) is 1,500 mPa s or more and 20,000 mPa s or less. (2) Residual viscosity after 30 seconds from mixing of all the components including the component (A) and the component (B) is 1,500 mPa s or more and 30,000 mPa s or less, and viscosity after 30 minutes from the mixture is 100,000 mPa s or less. (3) A coefficient of kinematic viscosity after 30 seconds from mixture of all the components including the component (A) and the component (B) is 1,200 m2 / s or more and 30,000 m2 / s or less. (4) Surface free energy of a cured product of a polyurea resin composition obtained from the polyurea resin composition production raw material is 30 mN / m or more and 63 mN / m or less.SELECTED DRAWING: None

The invention relates to a process for improving adhesive force of a butyl rubber plug crown surface coating, and belongs to the field of rubber materials. After the vulcanized molded rubber plug is cooled, impurities attached to the surface of the crown of the molded rubber plug due to the electrostatic action are removed through an electrostatic hair impurity removing machine; vulcanized residual silicone oil on the surface of the crown part of the molding rubber plug is removed through a liquid nitrogen oil removal device; the mold forming rubber plug is preheated, and the heating temperature ranges from 140 DEG C to 160 DEG C; a polysiloxane coating is evenly sprayed to the surface of the crown of the rubber plug through a high-pressure spray gun to be heated and cured, the curing temperature ranges from 120 DEG C to 130 DEG C, and the curing time ranges from 10 min to 15 min; and transferring the molded rubber plug into a dry and ventilated environment, standing and curing at normal temperature for at least 2 hours, then carrying out edge removal and light inspection, adding no silicone oil during cleaning, and normally packaging as required. By using the process provided by the invention, fine solid impurities and vulcanized residual silicone oil attached to the surface of the crown part of the molded rubber plug can be quickly and effectively removed, and the adhesive force of the surface coating of the butyl rubber plug is effectively improved.

1. Name of the design product: Automatic measuring instrument for curing time of amino resin. 2. Use of the design product: This design is used to measure the time required for amino resin to cure and gel, and it is a measuring instrument. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view 2.

The utility model provides a kind of glue reduction wall-penetrating terminal for preventing copper bar position deviation, including terminal main body, it is characterized in that, the terminal main body is equipped with multiple glue storage grooves, the glue storage groove is a blind hole structure, the top of the glue storage groove is upper opening, the upper opening is horn shape structure, the end of the glue storage groove is lower passage, the width of the lower passage gradually decreases from top to bottom, the inner wall of the glue storage groove is equipped with the baffle of opposite arrangement, gap for inserting copper bar is equipped between baffle;The baffle is arranged between the upper opening and the lower passage, and the gap height between the upper end of the baffle and the bottom of the upper opening is less than the gap height between the lower end of the baffle and the top of the lower passage.The utility model can occupy the space in glue storage groove by baffle, so as to reduce the amount of glue, reduce glue cost, accelerate glue curing time, also greatly reduce copper bar side deviation influence.

The invention relates to the technical field of polyurethane adhesives, in particular to an environment-friendly polyurethane adhesive and a preparation method thereof. The polyurethane adhesive disclosed by the invention is prepared from the following raw materials in parts by weight: 45 to 65 parts of polyethylene glycol, 28 to 35 parts of isophorone diisocyanate, 7 to 13 parts of modified chain extender, 3 to 6 parts of propylene glycol, 0.1 to 0.3 part of dibutyltin dilaurate, 0.1 to 0.5 part of antioxidant, 8 to 12 parts of inorganic filler, 1 to 3 parts of silane coupling agent, 1 to 3 parts of defoaming agent and 30 to 60 parts of deionized water. The adhesive has the advantages of being environmentally friendly, short in curing time, good in water resistance, good in heat resistance, high in bonding strength and the like, and can be widely applied to various materials such as metal, plastic and rubber.

The invention relates to a forming process for a large-size composite material, which comprises the following steps: designing a mold, enabling a gap to exist between a mold cavity and a top plate, and combining the mold; cutting fiber cloth, soaking the fiber cloth in the resin glue solution, and paving the fiber cloth in the mold cavity; the top plate covers the fiber cloth layer group, and the whole mold is placed on a molding press; mold closing is conducted, the top rib plate and the upper edge of the long-side panel are tightly pressed, and therefore redundant resin glue liquid overflows along the gap in the mold closing process; the top rib plate and the upper reinforcing rib are locked through an outer hexagon bolt; uniformly curing the mold in a drying oven; and taking out the product after curing, and cleaning the mold to obtain the composite material product. And in the mold closing process, redundant resin glue liquid overflows from the gap and is directly reserved at the top of the top plate, so that post-treatment is facilitated, and the procedure of cleaning the overflowed glue is simplified. And the mold is directly put into the drying oven for curing treatment, so that the curing time is saved, the consistency of the curing degree is improved, the quality is improved, and the production efficiency is improved.

The invention relates to the technical field of adhesive preparation, in particular to a preparation method of a urea-formaldehyde resin adhesive for ENF-grade artificial boards, used raw materials at least comprise formaldehyde, urea, an acid solution, an alkaline solution and epichlorohydrin, and the addition amount of epichlorohydrin accounts for 1-2 wt% of the weight of the urea-formaldehyde resin adhesive; meanwhile, the molar ratio of the formaldehyde to the urea is (0.85-0.95): 1. The adhesive has relatively low free formaldehyde content, higher waterproof performance, longer curing time and higher dry glue bonding strength and wet glue bonding strength, so that the adhesive is more suitable for processing.

The application relates to the gluing technical field and discloses a gluing method for constructing a dam by using local solidification, a gluing device and a storage medium. The gluing method comprises the following steps: dividing glue into external liquid glue and internal liquid glue; spraying the external liquid glue and the internal liquid glue at the same time according to a first control instruction; performing solidification treatment on the external liquid glue to construct an external dam according to a second control instruction; coating the external dam and the internal liquid glue on a product to be glued according to a third control instruction; and performing solidification treatment on the external dam and the internal liquid glue sprayed on the product to be glued at the same time according to a fourth control instruction. In the gluing process, the external liquid glue is first subjected to solidification treatment to construct an external dam, so that the internal liquid glue is prevented from flowing out of the external dam to form a glue layer of the internal liquid glue in the external dam; the external dam and the internal liquid glue are simultaneously solidified in the later period, a better glue form is obtained, the solidification time is shortened, and the gluing production efficiency is improved.

The present invention relates to a single-component room temperature fast self-curing insulation packaging material and a preparation method thereof, and belongs to the technical field of insulation materials. The invention solves the technical problem of slow deep curing of single-component room temperature self-curing dealcoholized silicone rubber in the prior art. The insulation packaging material of the present invention has a double-layer structure, and solves the problem of slow deep curing of single-component room temperature self-curing insulation packaging material by adding a hydrophilic polymer, a loaded catalyst and a chain extender, so that the packaging material can be cured at room temperature with a short curing time, and has the advantages of good adhesion, sealing, water resistance, voltage breakdown resistance, and weather UV aging resistance, and is extremely convenient to use. The preparation method of the single-component room temperature fast self-curing insulation packaging material of the present invention has a simple and feasible process, does not use toxic solvents, and is environmentally friendly and safe.

The invention provides a plugging agent composition and application thereof. The plugging agent composition comprises modified lignin, a resin emulsion, a filler, a stabilizer, a cross-linking agent and water, the curing time of the plugging agent composition is adjustable, and an elastomer formed after curing is high in deformation capacity, has enough compression stress, is good in high-temperature and high-salt resistance and can better adapt to changes of holes and pores in a high-temperature and high-salt environment; and the water plugging agent is low in cost, simple in preparation process, simple to operate during field use, good in field adaptability and suitable for water plugging operation of high-temperature and high-salt carbonate fractured-vuggy reservoirs.

The application discloses a kind of formaldehyde-free plant glue, the formaldehyde-free plant glue is two-component foaming glue, the two-component foaming glue includes colloid and curing component, the foaming rate of the formaldehyde-free plant glue is 40-80%.The formaldehyde-free plant glue prepared in the application can extend the operable time, the development time is long before hot pressing, and the curing time is short after hot pressing.The weight ratio of water and isocyanate in the raw material prepared in the application is 0.1996:25, which can balance the gel reaction and foaming reaction of the foaming glue, so that the foaming is uniform without affecting the strength of the board.The cell of the foaming glue after foaming is uniform small pore, which improves the glue layer strength and improves the bonding strength.In the bonding of sandwich structure of board, the bonding strength is large, and the colloid is not easy to be damaged during peeling.

The invention relates to the technical field of building glue, and discloses old house transforming and renovating glue and a preparation method thereof.The old house transforming and renovating glue is prepared from, by weight, 34-50 parts of quartz sand, 28-43 parts of cement, 15-22 parts of gypsum powder, 0.2-0.4 part of water glass, 0.8-3 parts of phosphate phenolic resin, 32-45 parts of water and the like. According to the invention, the phosphate phenolic resin is used for pre-dispersing the quartz sand, so that the dispersity of the quartz sand is improved, the performance of the renovating glue is enhanced, and the phenolic resin has a certain adhesive property and plays a role of a cementing agent in the renovating glue, so that the initial curing time is shortened, the adhesive strength is improved, and the service life of the renovating glue is prolonged. And the phenolic resin is beneficial to improving the water resistance and water resistance of the renovating glue.

This invention discloses a starch-based particleboard adhesive that cures rapidly at medium and low temperatures and its preparation method, belonging to the field of adhesive preparation technology. The starch-based particleboard adhesive of this invention comprises component A and component B; component A includes: 150 parts starch, 200-300 parts water, 20-25 parts concentrated hydrochloric acid, 12-18 parts dilute nitric acid, 25-40 parts sodium hydroxide solution, 6-9 parts initiator, 27-35 parts grafted monomer, and 2-5 parts emulsifier; component B includes: 8-11 parts ethylenediamine, a post-crosslinking agent. This starch-based particleboard adhesive effectively solves the problems of high curing temperature and long curing time in existing starch adhesives. While maintaining a relatively fast curing speed, it can reduce the curing temperature to 105℃, reducing the energy consumption in particleboard production. It can be widely used in the hot-press bonding of particleboard, plywood, fiberboard, and wood blocks.