9 results about "Rubber cement" patented technology

The invention relates to the technical field of recycled asphalt, in particular to a high-consumption RAP fine aggregate recycled asphalt mixture and a preparation method thereof.The high-consumption RAP fine aggregate recycled asphalt mixture is prepared from, by weight, 30-50 parts of RAP fine aggregate, 10-30 parts of RAP coarse aggregate, 25-30 parts of new coarse aggregate, 4-5.2 parts of matrix asphalt, 3-5 parts of cold additive recycled rubber cement, 3-5 parts of mineral powder and 0.2-0.26 part of warm mixing agent. When the total doping amount of the RAP is 60%, the proportion of the fine materials in the total RAP is larger than or equal to 50%, the fine materials can be stably doped, the discarding rate and energy consumption of the fine materials are remarkably reduced, and the RAP fine materials can be consumed in a high proportion.

The invention provides room-temperature vulcanized rubber cement for a static balance patch of an aircraft tire and a preparation method of the room-temperature vulcanized rubber cement, and the room-temperature vulcanized rubber cement is prepared by taking natural rubber as a main material and C5 petroleum resin, an anti-aging agent BLE-W, an anti-aging agent RD, an anti-aging agent 4020, an anti-reversion agent HVA-2, precipitated white carbon black, a silane coupling agent, high-wear-resistance carbon black, a diethyl dithiocarbamic acid accelerant and insoluble sulfur as auxiliary materials. One part is mixed through an open mill or an internal mixer to prepare masterbatch containing insoluble sulfur, then the masterbatch is dissolved in n-heptane to obtain first masterbatch cement, the other part is directly dissolved in n-heptane to obtain second masterbatch cement containing the accelerant SDC, and the two kinds of rubber cement are mixed according to the mass ratio of 1: 1 during use. The rubber cement is moderate in hardness and can perfectly accord with a natural rubber inner liner of an existing aircraft tire, the bonding strength between a static balance sheet using the rubber cement and a tire lining of the tire is high, and the rubber cement has the advantages of relatively high tensile strength and tearing strength, good heat aging resistance and room-temperature vulcanization capacity.

The invention discloses formaldehyde-free soft white adhesive cement and a preparation method thereof, and relates to the technical field of adhesive cement. The cleaning agent is prepared from the following raw materials in parts by mass: 57 to 67.5 parts of deionized water, 0.5 to 0.6 part of sodium bicarbonate, 90 to 108 parts of pre-emulsified liquid, 1 to 1.2 parts of ammonium persulfate, 3 to 4 parts of hybrid nano microspheres and 1.5 to 1.8 parts of propylene glycol methyl ether acetate. Wherein the pre-emulsion is prepared from the following raw materials in parts by mass: 45 to 54 parts of butyl acrylate, 20 to 24 parts of methyl methacrylate, 3 to 3.6 parts of acrylic acid, 5 to 6 parts of alpha-silane-terminated dynamic cross-linking agent, 15 to 18 parts of deionized water, 1 to 1.2 parts of sodium dodecyl benzene sulfonate and 1 to 1.2 parts of fatty alcohol-polyoxyethylene ether. According to the formaldehyde-free white adhesive cement disclosed by the invention, due to the introduction of the components such as the hybrid nano-microspheres and the alpha-silane-terminated dynamic crosslinking agent, the washing resistance, the flexibility after curing and the storage stability of the formaldehyde-free white adhesive cement are effectively improved.

The application discloses a rubber-cement composite material surface modifier optimization method based on molecular simulation, which comprises the following steps: based on molecular dynamics simulation, a full-atom numerical model for characterizing the physicochemical properties of cement matrix, rubber and modifier material is constructed by using Materials Studio software; based on the full-atom numerical model, the Gibbs free energy of the material system is calculated by using a quantum mechanics method to predict whether chemical reaction or physical adsorption behavior occurs between the selected modifier and the two types of materials of rubber and cement, and finally a rubber-cement-based composite material system model before and after the treatment of the modifier is constructed; the free volume fraction and atomic concentration of the composite material system model before and after the modification are analyzed on a microscale to quantitatively evaluate the effect of the modifier on the material performance, and then the optimal surface modifier is determined. The application can construct a numerical model accurately reflecting the material properties and analyze and optimize the material surface / interface modifier.

The invention relates to the technical field of rubber protective materials, and discloses a synergistically modified ethylene propylene diene monomer glove material with high chemical medium permeation resistance and a preparation method thereof. The glove material comprises synergistically modified ethylene propylene diene monomer rubber, zinc oxide, dicumyl peroxide, sulfur, an accelerant, an anti-aging agent, carbon black, a silane coupling agent and an organic solvent, wherein the synergistically modified ethylene propylene diene monomer rubber constructs a multi-crosslinking system synergistically by introducing a hydrazine hydrazone dynamic covalent network, a coordination structure and an organic-inorganic hybrid structure. The preparation method comprises the following steps: preparing synergistically modified ethylene propylene diene monomer rubber, preparing a rubber compound and rubber cement, and carrying out dip forming on a mold to form the glove material with the multi-layer compact structure. Through multi-scale synergistic modification, the chemical medium permeation resistance, the air tightness, the mechanical property and the aging resistance of the material are remarkably improved, the preparation process is simple, and the material is suitable for the field of high-end dry box protection.

The present application relates to a kind of rubber cement stabilized macadam mixtures rubber particle gradation optimization method, comprising the following steps: step 1, accurately control the gradation of aggregate;Step 2, determine rubber uniform dosage and cement uniform dosage;Step 3, select six positions of the largest size in particle size size below 9.5mm as replacement position, corresponding to the rubber particles of the same position are made;Step 4, for the aggregate position above particle size 2.36mm, the same volume of rubber particles of the same position is replaced, for the aggregate position below particle size 2.36, the rubber particle gradation is replaced using down-grade half method, obtain six groups of rubber particle gradation scheme;Step 5, prepare ordinary cement stabilized macadam test piece and six kinds of rubber cement stabilized macadam test piece under gradation scheme;Step 6, compare to obtain the best gradation scheme;The present application can realize the determination of the best rubber particle replacement scheme, help to promote the research of rubber particle mixed in ordinary cement stabilized macadam.

The utility model discloses a kind of rubber cement packaging equipment's rubber cement module, including horizontal displacement mechanism, the mounting bracket of setting in the movable end of horizontal displacement mechanism, the material wheel of rotation setting in mounting bracket for placing adhesive tape, the material pulling mechanism for pulling out adhesive tape along vertical direction, the compression roller assembly for being set to the rear of material pulling mechanism and being used to press the upper and lower surfaces of the outer edge of paper tray on the adhesive tape pulled out and the cutter assembly being set to the upper of compression roller assembly;Horizontal displacement mechanism includes mounting seat, the first screw rod of rotation setting in mounting seat, the first motor of being installed in one end of mounting seat and being connected with first screw rod and the sliding seat of being slidably arranged in mounting seat, sliding seat is provided with screw nut for being used to form thread cooperation with first screw rod, mounting bracket is connected with sliding seat.The utility model has the advantages of small control noise, stable operation, high control precision, and can control rubber cement module to any position according to actual needs, to adapt to different specifications of paper tray rubber cement needs.

The utility model discloses a reflective fabric for a tire. The reflective fabric comprises a reflective layer, an elastic fabric layer, a rubber cement layer and a rubber layer, the elastic fabric layer, the adhesive cement layer and the rubber layer are sequentially attached from top to bottom, the light reflecting layer is located on the top face of the elastic fabric layer and fixedly attached to the top face of the elastic fabric layer, the knitted fabric layer is arranged on the bottom face of the elastic fabric layer, the elastic fabric layer and the knitted fabric layer are integrally formed and woven, the adhesive cement layer is excessively filled with adhesive materials, and the adhesive materials are immersed in gaps of the knitted fabric layer. The surface of the rubber layer is smooth and tightly bonded with the mucilage layer; according to the reflective fabric in the patent scheme, through the design that the elastic fabric layer and the knitted fabric layer are woven and integrally formed, the thickness of the rubber layer can be effectively reduced, the ductility and the bending performance of the reflective fabric are greatly improved, and the reflective fabric can automatically adapt to vulcanization, attachment and fixed installation work of tires of different sizes; and the phenomenon that conventional products of the type turn up or fall off in the vulcanization process is avoided.

The invention belongs to the technical field of building materials, and provides modified rubber particles based on microorganism induced calcium carbonate deposition, a preparation method of the modified rubber particles and a rubber cement-based material. The preparation method comprises the following steps: carrying out surface hydrophilic pretreatment on rubber particles to obtain pretreated rubber particles; the method comprises the following steps: mixing pretreated rubber particles with a mineralized microorganism bacterial solution in the early stage of growth stability, culturing to obtain rubber particles adsorbed with mineralized microorganisms, mixing the rubber particles adsorbed with mineralized microorganisms with a cementing solution obtained by mixing a urea aqueous solution and a calcium acetate aqueous solution, and carrying out a deposition reaction, the modified rubber particles based on microorganism induced calcium carbonate deposition are obtained. According to the method, the adsorption quantity of bacteria on the surfaces of the rubber particles can be remarkably improved, so that the generation quantity of calcium carbonate crystals on the surfaces of the rubber particles is improved, the surface properties of the rubber particles can be comprehensively improved, the mechanical property of a rubber cement-based material can be remarkably improved, and the method has a very wide application prospect.