85results about How to "Low mass loss" patented technology

Described herein are methods of sanitizing and preserving produce and other agricultural products, for example for consumption as Ready-to-Eat. The methods can comprise treating the products with a sanitizing agent and forming a protective coating over the products.

The invention discloses wood modification chemical liquid and a method for treating wood through the wood modification chemical liquid. The wood modification chemical liquid is prepared from, by mass, 0.5%-5% of an activator, 5%-50% of low molecular sugar, 0-3% of a catalyst, 0-0.5% of a stabilizer and 0.5%-5% of additives and water. According to the wood modification treatment method, through vacuum and pressurization conditions, the wood modification chemical liquid is injected into wood materials, an active functional group in a modifier and a wood cell wall hydroxyl group are subjected to a grafting reaction under the high-temperature and dry conditions, and thus the active functional group is fixed in the wood cell wall. According to the wood modification chemical liquid and the method for treating the wood through the wood modification chemical liquid, the activator is an environment-friendly chemical, and in the process that the activator activates the low molecular sugar, the activator is decomposed into water and oxygen, or the activator can be subjected to separation recycling, so that the negative effect is not brought to the prepared wood modifier and the environment, and the problems of emission of formaldehyde, phenol, acetic acid and other micromolecule volatile matter existing in the prior wood modification art are effectively solved.

The present invention relates to a water absorption swelling rubber combination with a montmorillonite water-absorbing material and the preparation thereof, wherein the montmorillonite water-absorbing material is formed by intercalation-copolymerization with acrylic acid and acrylamide in the sheet layer of montmorillonite under the action of the initiator, and the water absorption swelling rubber is made of rubber group, montmorillonite water-absorbing material, activator, anti-aging agent, reinforcing filler, compatibilizer, water-absorbing accelerant, etc. by milling of the blender mill and then vulcanizing. The water absorption swelling rubber is easy to prepare, has an excellent water-absorption and a high rate, and can be used to prepare the waterproof and water-stop materials, building materials, etc.

The present invention is one kind of waterproof adhesive powder composition and its preparation process. The waterproof adhesive powder composition consists of aluminosilicate powder 30-40 wt%, hydrous siliate powder 15-35 wt%, silica powder 5-15 wt%, calcium carbonate powder 5-15 wt%, mineral powder 5-15 wt%, ethylene glue powder 5-15 wt%, plasticizer 0.5-1.5 wt%, thickener 0.2-0.5 wt%, organosilicon 1-3 wt%, coagulation accelerator 0.1-0.3 wt%, and anticracking agent 0.05-0.15 wt%.

The invention provides a preparation method of a microcapsule for preparing a temperature-adjusting textile product. The preparation method comprises the following steps: mixing mixed liquid of sodium alginate and calcium carbonate, paraffin and a water-oil composite emulsifying agent, and performing emulsifying reaction to obtain oil-in-water emulsion; mixing the obtained oil-in-water emulsion, petroleum ether and an acidic solvent, and performing curing reaction to obtain a primary microcapsule; performing condensation reaction on the obtained primary microcapsule and a chitosan acidic solution to obtain the microcapsule for coating the surface of the textile product. Results of embodiments show that after the temperature-adjusting textile product, of which the surface is coated with the microcapsule prepared by the method, is washed with water for 1 to 5 times, the mass loss rate is lower than 5 percent, so that the firmness of a phase-change material and a base fabric is high.

The invention relates to a method for preparing a molybdenum silicide coating on the surface of molybdenum or a molybdenum alloy. Silicon powder serves as a raw material, a plasma spraying technologyis adopted to prepare the silicide coating on the surface of the molybdenum or a molybdenum alloy matrix, then, heat treatment is carried out for 1-10 hours under the inert atmosphere at the temperature of 1,000 DEG C-1,500 DEG C, and therefore the molybdenum silicide coating is formed on the surface of the molybdenum or the molybdenum alloy. The preparation method has the advantages that the process is simple, the cost is low, the efficiency is high, repeatability is good, and method is suitable for scale production.

The invention relates to water-absorbent rubber made from hydrophilic fiber and a preparation method of the water-absorbent rubber. The water-absorbent rubber is prepared from raw materials including, by weight, 100 parts of nitrile rubber, 1.5 parts of an active agent A, 5 parts of an active agent B, 1.5 parts of an antiager, 40 parts of a reinforcing filler, 1.5 parts of a vulcanizing accelerator A, 1.5 parts of a vulcanizing accelerator B, 1.5 parts of a vulcanizing agent, 40-80 parts of water-absorbent resin, 1-10 parts of the hydrophilic fiber and 0-10 parts of a bulking agent. The invention further relates to the preparation method of the water-absorbent rubber. The water-absorbent rubber is high in water absorption rate, good in mechanical property and capable of being widely applied to the field of sealing materials high in rubber absorption property and mechanical property requirements.

The invention discloses a lightweight waterproof modified expanded perlite insulation board and a production method thereof. The modified expanded perlite insulation board comprises the following components in parts by weight: 25 to 40 parts of cement, 5 to 8 parts of fly ash, 2 to 5 parts of methyltrimethoxysilane, 5 to 10 parts of a polyacrylate emulsion, 50 to 70 parts of modified expanded perlite, 0.7 to 2.9 parts of sodium dodecyl benzene sulfonate, 5 to 10 parts of an additive, 1 to 3 parts of quicklime, 0.1 to 0.5 part of PP fiber, 0.5 to 2 parts of carbon fiber, 5 to 10 parts of kaolin, 4 to 10 parts of water glass and 10 to 20 parts of water. The modified expanded perlite insulation board provided by the invention uses cement, fly ash, kaolin, PP fiber and organic and inorganic matters as raw materials, so industrial and mineral waste materials are effectively utilized; meanwhile, no toxic and harmful substance is added, so greenness and environmental protection are achieved. The modified expanded perlite insulation board provided by the invention has the advantages of extensively available raw materials, low cost, simple production process, facilitation to operation, capability of meeting the demands of different building materials, and good social and economic benefits.

The invention discloses a mineral fiber enhanced modified expanded perlite insulation board and a production method thereof. The mineral fiber enhanced modified expanded perlite insulation board comprises in parts by weight, 25-40 parts of cement, 5-8 parts of coal ash, 2-5 parts of methyltrimethoxysilane, 5-10 parts of polyacrylate emulsion, 3-5 parts of mineral fibers, 50-70 parts of modified expanded perlite, 0.7-2.9 parts of sodium dodecyl benzene sulfonate, 5-10 parts of additives, 1-3 parts of calcined lime, 0.1-0.5 part of PP (polypropylene) fibers, 1-2 parts of sodium silicate and 10-20 parts of water. The mineral fiber enhanced modified expanded perlite insulation board takes the cement, the coal ash, the mineral fibers and other organic and inorganic matters as raw materials, industrial and mining waste materials are effectively used, toxic and harmful substances are not added, and the insulation board is green and environmentally friendly.

The invention provides oil and gas field fracturing fluid, an oil and gas field well cementation agent and an oil and gas field fracturing temporary plugging agent, which contain PVA (Polyvinyl Alcohol) fibers. The PVA fibers are papered from polyvinyl alcohol with the polymerization degree of 1000 to 3000 and the alcoholysis degree of 80 mole percent to 99.5 mole percent through spinning; the hydroformylation degree eta of the PVA fibers is 25 percent to 35 percent and Rp is 120 DEG C to 180 DEG C. The PVA fibers have the monofilament density of 1.0dtex to 1.8dtex at normal temperature and have the elongation at break of 10 percent to 25 percent; the slenderness ratio of the fibers is 200 to 600 and the real density of the fibers is 0.8g / cm<3> to 1.4g / cm<3>. The yield increasing range of the oil and gas field can reach 30 percent to 50 percent; the strength and toughness of the well cementation agent are remarkably improved and the well cementation agent can also have an anti-leakage effect; when being used in the fractured oil and gas field, the oil and gas field fracturing temporary plugging agent aims at plugging old cracks and breaking new cracks; when the fracturing temporary plugging agent is used, the pressure is raised by 6MPA or above and the yield of the oil and gas field is improved by two times or above.

The invention provides temperature-sensitive waterproof moisture-permeable shell fabric and a preparation method thereof. The preparation method includes soaking base cloth in hydrochloric acid for hydrolysis, wherein the base cloth is shell fabric which can contain an amino and / or hydroxy structure after being hydrolyzed; soaking the hydrolyzed base cloth in a glutaric dialdehyde solution for pre-crosslinking reaction, and subjecting the pre-crosslinked base cloth to padding treatment in temperature-sensitive hydrogel so as to obtain crosslinked base cloth; applying the surface of the crosslinked base cloth with a coating agent and baking so as to obtain the temperature-sensitive waterproof moisture-permeable shell fabric. The temperature-sensitive waterproof moisture-permeable shell fabric has the advantages of good temperature-sensitive performance and waterproof moisture-permeable performance as well as excellent washability because of good bonding performance and high bonding firmness between the temperature-sensitive hydrogel and nylon fabric.

The invention discloses a building material with energy storage and temperature adjusting functions, and relates to the technical field of energy-saving building materials. The specific heat capacityand the heat storage capacity of the building material prepared by compounding a compound phase change material and a building matrix material are greatly higher than those of a common building matrixmaterial, meanwhile, the anti-aging capability is enhanced, and the flame retardancy is remarkably improved, and the building material can quickly carry out heat storage and heat release at the phasechange temperature so as to improve the heat storage and release efficiency, so that the temperature adjusting capability is improved, and meanwhile, the building heating and air conditioning equipment running time is shortened, the environmental pollution is reduced, and the comfort level is improved; meanwhile, the compound material has sound absorption, sound insulation, water resistance and fire resistance, has the advantages of no toxicity, no odor, light weight, high strength and safety, and is more beneficial to practical large-scale popularization and application.

The invention relates to a compatibilizer of a water-swelling nitrile rubber and a preparation method of the compatibilizer. The preparation method comprises the following steps of: respectively dissolving nitrile rubber, maleic anhydride and an initiator in a solvent, and raising the temperature of a nitrile rubber solution to 55-75 DEG C; slowly adding a mixed solution of the maleic anhydride and the initiator to be subjected to a constant temperature reaction for 8-12h and then discharging; adding a precipitating agent to separate a graft product of the nitrile rubber and the maleic anhydride, and washing the product with distilled water; drying and cutting the washed graft product into pieces, and removing the initiator, the maleic anhydride and a maleic anhydride homopolymer by extraction; and drying to obtain the compatibilizer of the water-swelling nitrile rubber. The matrix of the water-swelling nitrile rubber prepared by the method has strong interaction with a water-absorbent resin, the water-absorbent resin does not easily fall off, the absorbency is increased, the mass loss rate of the water-absorbent resin is reduced, and the cost is saved and the preparation method is simple.

The invention provides a high-performance cold patch asphalt mixture and a preparation method thereof. The high-performance cold patch asphalt mixture is prepared from the following components in parts by mass: 100 parts of aggregate, 2.5-3.5 parts of mineral powder and 4.5-5.5 parts of a cold patch asphalt liquid. The preparation method comprises the following steps: preparing an additive from a coumarone resin, a terpene resin and an ethylene-vinyl acetate copolymer according to a formula; selecting matrix asphalt, a diluent and the additive according to a mass ratio of 100: (22-25): (6-8), heating the matrix asphalt, adding the diluent, dispersing under a high-speed dispersion instrument, cooling, adding the additive, and dispersing to obtain a cold patch asphalt liquid; and selecting and weighing aggregate, mineral powder and the cold patch asphalt liquid according to the mass parts, carrying out heat preservation development at different temperatures respectively, putting into a mixing pot, and mixing to obtain the cold patch asphalt mixture. According to the high-performance cold patch asphalt mixture provided by the invention, the storage stability, the construction workability, the Marshall stability, the water stability and the adhesive property of the cold patch asphalt mixture can be remarkably improved, and the purpose of prolonging the service life of the cold patch asphalt mixture is achieved.

The invention relates to a preparation method for modified oxidized starch formaldehyde-free plywood, and belongs to the technical field of plate preparation. The preparation method disclosed by the invention comprises the following steps: firstly, performing treatment on poplar blocks to obtain poplar fibers; then, performing nanometer treatment on the poplar fibers to obtain poplar nanofibers; then, performing acidolysis on pregelatinized corn starch, and then, enabling the pregelatinized corn starch to react with potassium peroxodisulfate; performing cross-linking reaction between prepared oxidized starch and borax; then, adding the prepared poplar nanofibers to obtain modified oxidized starch adhesive; finally, coating poplar veneers with the modified oxidized starch adhesive; forming plate blanks according to an odd level principle and the principle that fiber directions of adjacent veneers are mutually perpendicular; and performing hot press molding on the plate blanks to obtain the modified oxidized starch formaldehyde-free plywood. The modified oxidized starch formaldehyde-free plywood prepared by the preparation method disclosed by the invention does not contain free formaldehyde, and cannot release other harmful gases, and the preparation process is simple, and required cost is low.

The invention belongs to the technical field of feed compositions, particularly relates to a feed for laying hens in the hen laying period for extending the shelf life of an egg and a preparation method, and relates to a high-selenium egg with long shelf life by using the feed. The feed is prepared from the following raw materials of 20 to 35 parts of corn, 5 to 8 parts of soybean meal, 2 to 5 parts of extruded soybean, 3 to 8 parts of extruded flaxseed, 3 to 8 parts of corn protein powder, 2 to 4 parts of sesame meal, 3 to 8 parts of rice bran, 1 to 3 parts of pepper residue, 0.5 to 1.0 partof palm kernel oil, 1 to 5 parts of barley rootlet, 0.8 to 2 parts of biological fermenting feed, 0.03 to 0.05 part of Youkebao, 0.025 part of selenium yeast, and the like. The biological fermenting feed is prepared by mixing and fermenting coagulation bacillus, lactobacillus plantarum, lactobacillus lactobacillus and saccharomyces cerevisiae. The feed has the advantages that the feed is used forthe culturing of laying hens, the content of selenium in each is higher than 22.85mug, the shelf life is 80 days at the temperature of 4 to 8 DEG C, and the shelf life at normal temperature is 50 days.

The invention provides a processing method for preventing mouldness of lichen on the surface of a desulfurized plaster block, which comprises the following steps: mixing various compositions in a mouldproof chemical agent formula in proportion, evenly stirring for 15 minutes and filling in a sealing bag for sealing; when the mouldproof chemical agent is used, directly adding 0.3 percent of the dosage into a block releasing agent for dissolution, and directly spraying the solution on a clapboard and a bottom die of a die cavity of the desulfurized plaster block; and adding 2 percent of quicklime in the process of adding water and stirring a raw material of the desulfurized plaster block, namely 98 percent of desulfurized plaster powder, pouring the stirred desulfurized plaster slurry into the die cavity of the block, ejecting and demoulding when the desulfurized plaster slurry is initially set, and directly airing the die. The processing method for preventing the mouldness of the lichen on the surface of the desulfurized plaster block saves troubles of manually processing the lichen, and reduces the mass loss rate of products.

The invention discloses a preparation method of hydrophilic fiber modified water swelling hydrolyzed nitrile rubber. Nitrile rubber and hydrolyzed nitrile rubber are plastified in a double drum open mill for 3-5 min, then an active agent A, an active agent B, antiager, a vulcanization accelerator A, a vulcanization accelerator B and a vulcanizing agent are added in sequence, after each auxiliary is added, mixing is conducted for 1-2 min, and then the next auxiliary is added; hydrophilic fiber and water-absorbent resin are added, mixing is conducted for 10 min, finally, white carbon black and carbon black are added in a rubber matrix, the mixture is mixed to be uniform, triangle packaging is conducted six times, and mill run, sheeting and standing are conducted; after the obtained object isplaced on the open mill and subjected to mill run, the roller spacing of the open mill is gradually adjusted to be 4 mm from 2 mm, glue passes through a drum several times repeatedly to make the hydrophilic fiber oriented in the glue calendering direction, and then standing is conducted; the obtained object is placed in a tablet-pressing mold, vulcanization is conducted for 10 min on a plate vulcanizing machine at 15 MPa at 160 DEG C, mold opening is conducted, and vulcanized water swelling hydrolyzed nitrile rubber is taken out, and standing and sample cutting are conducted.

The invention belongs to the technical field of cement mortar, and particularly relates to cement mortar and a preparation process thereof. The cement mortar comprises, by weight, 120-287 parts of cement, 30-150 parts of diatomite, 30-106 parts of fly ash, 20-80 parts of epoxy resin emulsion, 10-30 parts of polyethylene glycol, 100-206 parts of water, 10-50 parts of toughening agents and 10-50 parts of defoaming agents. The cement mortar has excellent mechanical property such as compressive strength and bending strength and better corrosion resistance.

The invention belongs to the technical field of fireproof door materials, and particularly relates to a fireproof door core veneer formed through rapid autoclaved curing and a preparation method thereof. The fireproof door core veneer is prepared from the following raw materials: water, a cement additive, nano silica sol, a waterproof agent, short fibers, fly ash, gypsum powder, active slag powder, ground calcium carbonate powder, Portland cement and a water-based composite foaming agent. Directional high-temperature and high-pressure curing of the fireproof door core plate is achieved throughthe autoclaved curing forming procedure. A product which has the advantages of the light weight, high strength, heat insulation, the stable volume, excellent water resistance, low water content, lowwater absorption, the low mass loss rate, high heat resistance, good heat stability, excellent carbonization resistance, metal protection function, safety, environmental protection and A-grade fireproof performance is formed; and the whole process flow time of the product from burdening production to terminal qualified products is less than 48 hours, the production efficiency is high, and the comprehensive cost is low.

The present invention discloses a method for preparing a prebaked anode with high-sulfur coke. The high-sulfur coke is calcinated independently and grinded into powder in the prebaked anode formulation. The method comprises the following steps: A, calcinating the high sulfur coke with a sulfur content of 3-5% at 1250-1350 DEG C in a rotary kiln independently, then storing in a high-sulfur coke dedicated rear-calcination cabin; B, preparing the high-sulfur coke after calcination into powder; and C, dosing the powder with a sulfur content of 3-5% according to a normal production process, wherein the weight ratio of S / Ca in the raw material is (36-62):1. An embodiment of the invention can solve the problems that the molding raw block is low in density and the products are easy to crack in calcinations through calcinating the high sulfur coke independently, storing independently and making into the powder as an anode material; and can improve the oxidation resistance of the anode and reduce the environmental pollution caused by the high sulfur coke in the prior art.

The invention discloses an SMT production line analysis platform based on digital twinning which is accurate in result and visual in process. According to the technical scheme, transmission of information and data is achieved between an SMT production line physical space and an SMT production line virtual space through a data bus, and a data layer divides the data into a design class, a process class, a quality class and an adjustment and measurement class according to data types and maps the data to a twinning layer in a virtual-real mode; the twinning layer organizes and couples the digitaltwinning bodies according to the functional relationship among the twinning bodies; wherein the analysis layer drives a quality prediction algorithm and a quality tracing algorithm through twinning bodies to perform tracing and quality prediction on the printing and welding quality of a production line, the system layer performs visual design based on the SMT production line digital twinborn library, the deep learning algorithm library and the quality prediction model and the quality tracing model in the model library; through an industrial prediction and quality tracing APP, the quality of the production line is visually displayed in real time in a three-dimensional space, and quality early warning is carried out in the product production process.

The invention relates to a preparation method of a modified terminal hydroxyl polybutadiene liquid rubber light-heat dually-cured material. The preparation method comprises following steps: at first,placing acryloyl chloride modified terminal hydroxyl polybutadiene liquid rubber in vacuum to remove bubbles and micromolecular impurities in the system; then adding a filling material, a photo initiator, and a heat initiator, evenly mixing to obtain liquid cement, painting the liquid cement on a die, and carrying out UV curing and heat curing in sequence to prepare the light-heat dually-cured rubber material. At first, light curing is carried out to rapidly convert liquid cement into a solid film, the UV rays are utilized to trigger chain reactions to synthesize polymers, then UV cured rubberis thermally cured, the rubber is more completely cured, the molecular chains are more tightly bonded, and the comprehensive performance of the rubber material is strengthened. The prepared light-heat dually-cured rubber material has excellent mechanical properties, heatproof property, waterproof property, and acid corrosion resistant property.

The invention discloses a preparation method of a modified poly (vinylidene fluoride-co-hexafluoropropylene) grafted vinyl imidazole anion exchange membrane. The preparation method comprises the following steps: (1) fully stirring poly (vinylidene fluoride-co-hexafluoropropylene) and DMAc in a container to obtain a transparent solution A; (2) slowly adding a strong alkali alcohol solution into the solution A, and stirring to obtain a solution C; (3) slowly adding the solution C into excessive deionized water to obtain a fibrous solid, washing the solid with deionized water until the solid is neutral, and performing vacuum drying to obtain a solid D; (4) dissolving the solid D, vinyl imidazole and benzoyl peroxide in NMP to obtain a solution E; and (5) carrying out heating reaction on the solution E in a nitrogen atmosphere, adding 1, 4-dibromobutane, fully stirring, paving the obtained solution on a clean glass plate, and carrying out vacuum drying to obtain the modified poly (vinylidene fluoride-co-hexafluoropropylene) grafted vinyl imidazole anion exchange membrane. The prepared membrane is excellent in acid concentration performance, good in acid resistance and low in swelling degree.

The invention discloses a cement-based modified expanded perlite insulation board and a production method thereof. The insulation board comprises the following components in parts by weight: 25 to 40 parts of cement, 5 to 8 parts of fly ash, 2 to 5 parts of methyltrimethoxysilane, 5 to 10 parts of a polyacrylate emulsion, 50 to 70 parts of modified expanded perlite, 0.7 to 2.9 parts of sodium dodecyl benzene sulfonate, 5 to 10 parts of an additive, 1 to 3 parts of water glass, 0.1 to 0.5 part of PP fiber, 0.5 to 2 parts of hydroxypropyl methyl cellulose, 3 to 5 parts of zirconia fiber and 10 to 20 parts of water. The modified expanded perlite insulation board provided by the invention uses cement, fly ash, PP fiber and organic and inorganic matters as raw materials, so industrial and mineral waste materials are effectively utilized; meanwhile, no toxic and harmful substance is added, so greenness and environmental protection are achieved. The modified expanded perlite insulation board provided by the invention has the advantages of extensively available raw materials, low cost, simple production process, facilitation to operation, capability of meeting the demands of different building materials, and good social and economic benefits.

The invention relates to the technical field of new materials, in particular to a method for enhancing the fire resistance and the thermal stability of PVC through functional oxidized graphene. According to the method, overflow of degradation products and poisonous gas and transmission of heat are inhibited in burning through a net-shaped carbon skeleton structure of the oxidized graphene, so that the fire resistance and the thermal stability of the PVC can be improved. For the defect that the property is influenced due to the fact that the oxidized graphene is poor in dispersibility in the PVC, the oxidized graphene is modified with 3-aminopropyltriethoxysilane; through amidation between amino end groups and carboxyl groups on the oxidized graphene, a SiO2 layer is successfully anchored on the surface of the oxidized graphene; finally, through ultrasonic dispersing, mixing, falling film casting and the like, GO is composited with the PVC.

The invention belongs to the technical field of feed compositions, and specifically relates to a laying hen compound premixed feed for prolonging the shelf lives of eggs and a preparation method thereof, and long shelf life high-selenium eggs. The compound premixed feed is mainly prepared from the following raw materials in parts by weight: 20-30 parts of oat husk powder, 10-15 parts of bio-fermented feed, 11.6-15 parts of expanded linseed, 1.5-3 parts of yeast cell walls, 0.35-0.5 parts of yeast selenium, 0.3 part of vitamin E, 0.4-0.8 part of tea polyphenols, 0.8-1.2 parts of soy isoflavones, and the like. When the premix is used for breeding laying hens, the selenium content of the obtained eggs is more than 45.5 mug / 100 g eggs, and the shelf life at 4-8 DEG C can reach 80 days.

The invention discloses a white-mud base permeable brick and a preparation method thereof. The white-mud base permeable brick comprises a permeable brick base layer and a permeable brick facing layer,wherein the permeable brick base layer is prepared from aggregates A, a gel material A and water, and the gel material A comprises white mud, cement, coal ash, mineral waste residue and metakaolin; and the permeable brick facing layer comprises aggregates B, a gel material B and water, and the gel material B comprises white mud, cement, coal ash and mineral waste residue. The invention also provides a preparation method of the permeable brick. The permeable brick has the advantages of high strength, high permeability, freeze resistance and low cost.

The invention relates to a method for preparing reactive compatibilization-type nitrile water-swelling rubber. The method comprises the following steps: sequentially adding an active agent A, an active agent B, a vulcanizing agent, an anti-aging agent, a water absorbing additive and a bulking agent after plastifying nitrile rubber on an open mill by adopting a thinning coating roll; adding water-absorbing resin to evenly mix after mixing evenly, and then adding reinforcing filler carbon black and white carbon black; milling, and finally adding a vulcanization accelerator A and a vulcanization accelerator B to evenly mix; packaging into a triangular packet; thinning, batching off and standing for later use; putting the mixed nitrile rubber into a tabletting mold; vulcanizing, opening the mold, taking out the vulcanized water-swelling nitrile rubber, standing and cutting. The method has the advantages and beneficial effects that the preparation method is simple, and low in requirement on equipment, so as to save the cost. The method can be widely applied to tunnels, culverts, swimming pools, basements, underwater engineering, downhole oil recovery, water supply facilities, civil construction and the like.

The invention provides a synthesis method of flame-retarding polymethyl methacrylate, which includes the steps of: a) dissolving to-be-purified dibenzoyl peroxide in trichloromethane and filtering the impurities away, adding methanol at equal volume until the dibenzoyl peroxide is crystallized and separated out, filtering the mixture, washing the crystal in cold methanol and drying the crystal at room temperature in a vacuum drying box, and storing the crystal in a dark place for later use; b) successively adding triphenyl phosphate, nano ZrO2 and N,N-dimethylaniline to methyl methacrylate in a container according to a formula at room temperature, mixing the re-crystallized dibenzoyl peroxide with the components, sealing the container by a sealing material, and heating the container in a water bath pot at 30 DEG C with stirring; c) when the viscosity of the solution in the container reaches 250 Pa*s and the solution can be smoothly poured out, pouring the solution into a mold prepared before, and waiting for 1 h at 60 DEG C to prepare a test sample. The flame-retarding polymethyl methacrylate has good flame-retarding performances and excellent mechanical performances.