529 results about "Low shrinkage" patented technology

The invention discloses a transparent composition photoresist with low shrinkage and low vacuum deflation. Comprising the following raw materials in percentage by mass: 1-5% of modified polyhedral oligomeric silsesquioxane (POSS), 1-5% of an expanding monomer, 1-5% of modified acrylic resin, 1-5% of epoxy resin, 1-5% of a thiol cross-linking agent, 1-5% of an initiator, 0.1-3% of a curing accelerator, 0.2-0.5% of a flatting agent, 0.1-5% of a silane coupling agent, 0.01-0.2% of an antioxidant and 80-90% of an electronic-grade organic solvent. The invention also provides a preparation method of a cured coating prepared from the transparent composition photoresist with low shrinkage and low vacuum deflation. The product provided by the invention not only can maintain the properties of high hardness, high thermal stability, high planarization ability, high barrier property, low hygroscopicity, low dielectric constant and the like of the transparent composition photoresist coating, but also can enable the transparent composition photoresist coating to have excellent low shrinkage and low outgassing, thereby achieving the purposes of saving energy, reducing emission, reducing cost and improving efficiency; the low shrinkage of the transparent composition photoresist coating also widens the development of the material in the fields of other panel production processes such as OLED (Organic Light Emitting Diode) and the like.

The invention discloses a low-shrinkage high-toughness sprayed concrete material as well as a preparation method and application thereof, and the low-shrinkage high-toughness sprayed concrete material is prepared from the following materials in parts by mass: 400 to 440 parts of cement, 50 to 70 parts of coal ash, 20 to 40 parts of silica fume, 170 to 190 parts of water, 850 to 880 parts of fine aggregate, 770 to 810 parts of coarse aggregate, 30 to 50 parts of accelerator and 3.2 to 6.0 parts of water reducing agent. Hybrid fibers: 30 to 50 parts of steel fibers and 0.9 to 2.7 parts of organic fibers. The low-shrinkage high-toughness sprayed concrete material provided by the invention can ensure high compressive strength and toughness, also has good durability and stability, effectively improves the construction quality of tunnel engineering, and has very excellent market prospects.

The invention relates to composite resin for packaging a Topcon component as well as a preparation method and application of the composite resin. Comprising an acrylate monomer, an aliphatic polyurethane acrylate oligomer, hydroxyl acrylate, bisphenol A acrylate, maleic anhydride modified epoxy acrylate, a light curing agent, a latent curing agent, a flame retardant A, a flame retardant B, a thixotropic agent, an anti-aging agent, a UV absorbent and a light stabilizer. The composite resin has the comprehensive performance of high viscosity, low shrinkage, super weather resistance and flame retardance, the aluminum-containing backboard prepared from the composite resin is high in water resistance and super weather resistance, due to the fact that light-heat double-stage curing is adopted for curing, the resin collapses and is cured to generate a solid phase, and in the follow-up aluminum foil hot-pressing curing process, the solid phase is solidified to form a solid phase; the resin is further infiltrated and cured, the porosity of the resin can be greatly reduced through a dual-curing system, water cannot enter the interior in the long-term use process, and voltage breakdown reduction of the aluminum-containing back plate under the long-term damp and hot condition is completely eradicated.

The embodiment of the invention provides a UV (ultraviolet) thermal dual-curing adhesive and a preparation method thereof. The UV thermal dual-curing adhesive comprises the following components in percentage by mass: 30-55% of a photocuring prepolymer; 5%-25% of an active diluent monomer; 1%-10% of a photoinitiator; 1%-20% of a thermal initiator; 10%-40% of a filler; 0.5%-5% of a coupling agent; 1%-10% of a thixotropic agent; 1%-10% of pigment; 2%-8% of an auxiliary agent; wherein the photocuring prepolymer comprises epoxy resin. According to the UV thermal dual-curing adhesive and the preparation method thereof provided by the embodiment of the invention, the dual-curing adhesive with low shrinkage and low thermal expansion coefficient is obtained by optimizing the structure of the photocuring prepolymer and matching the components, and the prepared adhesive can be rapidly cured under the irradiation of LED 365nm ultraviolet light, or can be thermally cured under the low-temperature condition of 80 DEG C, so that the UV thermal dual-curing adhesive can be widely applied to the field of ultraviolet curing. The product can resist high and low temperature cycle impact of-50 DEG C to 140 DEG C, and has a good application prospect.

The invention belongs to the technical field of building materials, and particularly discloses maintenance-free lightweight spraying ultra-high performance concrete as well as a preparation method and application of the maintenance-free lightweight spraying ultra-high performance concrete. Comprising 700 to 900 parts of Portland cement, 120 to 200 parts of silica fume, 100 to 200 parts of a layered mineral admixture, 30 to 70 parts of a gradient active expanding agent, 600 to 800 parts of modified lightweight aggregate, 0.5 to 3 parts of a rheology regulating agent, 40 to 80 parts of composite fiber, 7 to 10 parts of a water reducing agent and 170 to 200 parts of water. Based on the synergistic effect of all the components, on the basis that the light ultra-high performance concrete can be continuously sprayed, the spraying performance, the shrinkage performance and the interface bonding performance are further improved, the anti-cracking performance, the mechanical performance and the durability of the light ultra-high performance concrete are enhanced, formwork erecting, film covering maintenance and later maintenance are not needed in construction, and the construction period is shortened. And moreover, the coating has the advantages of small apparent density, strong interface adhesion, thick single-time spraying, high crack resistance, low shrinkage, ultrahigh strength, high durability and the like.

The invention discloses multi-scale toughened concrete and a preparation method thereof, and belongs to the technical field of high leakage, and the multi-scale toughened concrete comprises aluminoferrite cement, a low-shrinkage auxiliary cementing material, a water reducing agent, multi-scale composite fibers, a shrinkage compensation agent, fine aggregate, coarse aggregate and water. A traditional toughening mode is broken through, a physical-chemical composite connection interface is established through a magnetron sputtering metal gradient coating of crude fibers and a laser-induced dendritic crystal structure, a strain hysteresis effect is triggered under an impact load, impact energy is converted into interface phase change energy, and a high-efficiency energy dissipation channel is formed; an amino functional group and free radical cross-linked network is introduced into the fine fibers, and the fibers are endowed with microcosmic dynamic enhancement capability in combination with directional arrangement of the carbon nanotubes, so that the concrete forms cooperative interaction between macroscopic crack bridging and microcosmic crack inhibition, the crack resistance under complex stress is remarkably improved, and microcrack propagation is effectively inhibited.

The invention relates to the technical field of cement-based building materials, in particular to low-shrinkage ultra-high-performance concrete and a preparation method thereof.The concrete production cost is reduced by replacing cement with a large amount of admixture, ardealite-based coarse aggregate and solid waste lightweight aggregate are prepared from industrial solid waste to serve as aggregate, and the concrete strength is improved; the internal curing effect is achieved, and the shrinkage of the ultra-high performance concrete is reduced together with a self-made expanding agent.

The invention provides a phase change compensation low-thermal expansion coefficient resin formula and a preparation and use method of a composite prepreg tape of the phase change compensation low-thermal expansion coefficient resin. Tin micro-powder subjected to surface capsule coating treatment is added into a resin system, and heat absorption and low-temperature phase change volume expansion principles of the tin micro-powder are utilized; the resin system for the composite material has the characteristics of low heat release, low shrinkage and low thermal expansion coefficient. And by controlling the addition amount of the tin micro powder, the thermal expansion coefficient of the material is accurately regulated and controlled, generation and expansion of matrix microcracks are reduced or even inhibited, and the material performance is improved. Through microcapsule surface treatment and control of the particle size and shape of the tin micro powder, the interface compatibility problem can be solved, and resin toughening is realized. The method for producing the prepreg tape by the hot infiltration and cold demolding continuous drawing method is suitable for continuous and efficient production of the prepreg tape for high-performance fiber dry winding. The method has important economic, technical and social values, lays a foundation for scientific exploration and technical progress in the livelihood field, and improves the market competitiveness of products.

The invention provides a polymer alloy material, a preparation method thereof and a flow cell panel frame, and belongs to the technical field of high polymer materials. The polymer alloy material comprises the following components: 25-80% of polyolefin, 10-20% of engineering plastic, 1-5% of a compatilizer, 5-50% of an inorganic filler and 0.1-5% of an auxiliary agent. Wherein the engineering plastic is selected from one or more of a styrene methyl methacrylate copolymer, a styrene-butadiene methyl methacrylate copolymer, polycarbonate, polyphenyl ether, polyphenylene sulfide, a styrene-maleic anhydride copolymer or a styrene-acrylonitrile copolymer. The polymer alloy material forms a bicontinuous phase structure with'sea-sea 'microscopic dispersion characteristic and tight interface bonding, can simultaneously have the characteristics of excellent heat resistance, corrosion resistance, high flow, low shrinkage, high modulus and the like, and makes up for the defect of insufficient performance of the existing liquid flow cell panel frame plate PP material.

To provide a multi-layer biaxially oriented film that is resistant to tearing and the like even when stretched at high ratios, and that exhibits excellent heat resistance, particularly heat seal resistance (low shrinkage during heat sealing).SOLUTION: A multi-layer biaxially oriented film comprises an A layer and a B layer, wherein the A layer comprises: a resin composition comprising 75-99 mass% of a polymer satisfying (I) to (II); and 1-25 mass% of a copolymer satisfying (III) to (IV). (I): A content of a constituent unit derived from 4-methyl-1-pentene is 90.0-100 mol%, and a content of a constituent unit derived from a C3-20 α-olefin other than 4-methyl-1-pentene is 0.0 to 10.0 mol%. (II): A melting point is 200-250°C. (III): A content of a constituent unit derived from 4-methyl-1-pentene is 65.0-96.0 mol%, and a content of a constituent unit derived from a C8-20 α-olefin is 4.0 to 35.0 mol%. (IV): A melting point is not observed or is 100 to 199°C.SELECTED DRAWING: None

The invention discloses a flame-retardant PBT (Polybutylece Terephthalate) / brominated polycarbonate composition, which comprises the following components in parts by weight: 40-60 parts of PBT; 30 to 50 parts of brominated polycarbonate; 0.2 to 0.5 part of an anti-dripping agent; 10 to 15 parts of a glycidyl methacrylate grafted toughening agent; the viscosity average molecular weight of the brominated PC ranges from 13000 to 30000, and the molar ratio of the bisphenol A to the tetrabromobisphenol A is (55 to 40) to (45 to 60). The brominated polycarbonate with specific parameters is selected and cooperated with the glycidyl methacrylate grafted toughening agent, so that the flame retardance of V-0 can be realized, and the advantages of high low-temperature toughness (notch impact property tested at-30 DEG C) and low shrinkage after baking can also be realized.

The invention belongs to the technical field of biomedical oral materials, and relates to novel POSS (Polyhedral Oligomeric Silsesquioxane) and a preparation method thereof as well as oral rehabilitation low-shrinkage composite resin as well as a preparation method and application thereof. The invention relates to a novel POSS (polyhedral oligomeric silsesquioxane) preparation method, which comprises: mixing trimethoxy [2-(7-oxabicyclo [4.1. 0] hept-3-yl) ethyl] silane, silane containing double bonds and an organic solvent, carrying out a hydrolysis-polycondensation reaction to obtain a liquid material, and carrying out liquid separation, suction filtration, washing, rotary evaporation and drying to obtain the novel POSS. The prepared novel POSS with the reaction double bonds and the epoxy shrinkage groups is good in biocompatibility and stability and has the remarkable low shrinkage characteristic and hydrophobicity, the low-shrinkage composite resin for oral cavity restoration prepared from the novel POSS as a functional component can remarkably reduce the polymerization shrinkage rate of the composite resin and reduce water permeation under the condition of a low addition amount, and the composite resin can be used as a functional component for oral cavity restoration of the oral cavity restoration of the oral cavity restoration of the oral cavity restoration of the oral cavity restoration of the oral cavity restoration of the oral cavity restoration of the oral cavity restoration of the oral cavity. The stability of the composite resin is improved, and the composite resin can be widely applied to various oral resins.

The invention discloses a polypropylene composite material as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The invention provides a polypropylene composite material. The polypropylene composite material comprises the following components in parts by weight: 40-80 parts of copolymerized PP (polypropylene), 5-25 parts of POE (polyolefin elastomer), 5-25 parts of polyisobutene and 10-30 parts of filler, the number-average molecular weight of the polyisobutene is greater than 600. The POE elastomer, the polyisobutene and the filler are introduced into the copolymerized PP, so that the polypropylene composite material with low sink mark characteristic and good mechanical property can be obtained.

The invention discloses an admixture for low-shrinkage ultra-high performance concrete as well as a preparation method and application of the admixture. The admixture is prepared from the following components in parts by weight: 15 to 18 parts of silica fume, 10 to 15 parts of microbeads, 10 to 15 parts of mineral powder, 0.3 to 0.5 part of a plastic expanding agent, 4 to 6 parts of a calcium expanding agent, 4 to 6 parts of a magnesium expanding agent, 3 to 5 parts of anhydrite, 0.1 to 0.2 part of water-absorbent resin, 0.1 to 0.2 part of a de-foaming agent and 0.5 to 1 part of a water reducing agent. The admixture for the low-shrinkage type ultra-high performance concrete is excellent in adaptability, on one hand, the compressive strength and working performance of different ages can be improved, and on the other hand, the problems that due to the fact that the mixing amount of a traditional ultra-high performance concrete binding material and the using amount of cement are high, the concrete is large in shrinkage and prone to cracking are effectively solved.

The invention discloses epoxy resin for an optical fiber array and a preparation method thereof, and belongs to the technical field of epoxy resin preparation. The epoxy resin for the optical fiber array consists of the following components in parts by weight: 50-80 parts of epoxy resin, 5-30 parts of modified functional resin, 5-10 parts of a toughening agent, 1-5 parts of an auxiliary agent and 5-20 parts of a composite curing agent. The epoxy resin for the optical fiber array prepared by the method has excellent thermal stability and mechanical strength, also has low shrinkage and curing shrinkage stress, and avoids debonding of optical fibers and an adhesive layer.

The invention discloses a warp-resistant mineral reinforced PC / PBT alloy material with dimensional stability and a preparation method thereof, and relates to the technical field of polymer composite materials. The preparation method comprises the following steps: weighing polycarbonate, polybutylene terephthalate, ureido pyrimidone-polydimethylsiloxane, epoxy polyhedral oligomeric silsesquioxane, polyimide coated halloysite nanotubes, magnesium-aluminum hydrotalcite, perfluoroalkyl modified boron nitride nanosheets, liquid crystal polymer microfibers, modified PVA (Polyvinyl Alcohol) fibers and a silane coupling agent KH550 according to a ratio; the preparation method comprises the following steps: pre-mixing polycarbodiimide and a composite antioxidant to obtain a mixture, mixing, adding into a double-screw extruder, extruding and granulating, drying, carrying out injection molding, and standing at constant temperature and constant humidity to obtain the composite material. The invention has the significance of providing the PBT / PC alloy material with dimensional stability, warping resistance, low shrinkage rate, low hygroscopicity, creep resistance, impact resistance, arc resistance and chemical corrosion resistance for consumer-grade and industrial-grade underwater plastic parts.

The invention belongs to the field of intelligent materials, and discloses a nematic phase liquid crystal elastomer fiber and a method for optimizing the thermal shrinkage performance of the nematic phase liquid crystal elastomer fiber. According to the method, the mass ratio of a cross-linking agent pentaerythritol tetra (3-mercaptopropionate) (PETMP) to a chain extender 2, 2 '-[1, 2-ethanediyl bis (oxygen)] bis (ethanethiol) (EDDET) in an LCE spinning solution is accurately controlled through a wet spinning technology, and drafting and heat treatment processes are combined, so that the LCE fiber with adjustable and controllable heat shrinkage performance and mechanical performance is prepared. The invention aims to overcome the limitations of low response speed, low shrinkage rate, insufficient environmental stability and the like of the existing LCE fiber. The reversible thermal shrinkage rate of the fiber can reach up to 35%, the maximum shrinkage deformation can be completed within 2 seconds at the soonest at the temperature of 80 DEG C, and the maximum tensile strength can reach 170 MPa. And the catalyst has excellent oxidation stability (the mass retention rate is about 97%), and can maintain efficient thermal response in a water environment. And a new way is provided for development of high-performance intelligent materials.

The invention belongs to the technical field of plastic alloy materials, and particularly relates to a multifunctional PA6 / ASA alloy material and a preparation method thereof.The preparation method comprises the steps that a proper biomass-based porous silicon carbon material is selected for treatment; weighing the PA resin, the AS resin and the compatilizer, putting into a stirring pot, and uniformly stirring; adding a wetting agent into the stirring pot, and uniformly stirring; adding a processing aid, toughened acrylic rubber powder and the treated biomass-based porous silicon carbon material into a stirring pot, uniformly stirring at a high speed, and adding the mixed material into a main feeding weightlessness scale; and setting the blanking amount of the weightlessness scale to be 30Kg / h, setting the rotating speed of a screw rod to be 420r / min, starting auxiliary equipment, and carrying out granulation production. The method is superior to a method for filling the PA6 / ASA material with inorganic minerals in special microcosmic shapes and adding a large number of functional auxiliaries, and light weight, noise reduction, low shrinkage, wear resistance, highlight, weather resistance and high temperature resistance can be achieved in the state that a single filler is added.

The invention belongs to the technical field of textile material processing, and particularly discloses a preparation method of high-strength low-shrinkage composite yarn for spinning. A preparation method of a high-strength low-shrinkage composite yarn for spinning comprises the following steps: (1) respectively drying ultra-high molecular weight polyethylene and PET polyester, adding maleic anhydride grafted PE, a treated metal organic framework material, boron carbide nanoparticles, cellulose acetate and a silane coupling agent KH550, uniformly mixing, and carrying out melt extrusion to obtain nascent fibers; (2) performing first-stage pre-drafting, second-stage high-temperature tension field drafting and third-stage low-temperature relaxation treatment on the nascent fiber to obtain treated fiber; and (3) dipping the treated fiber in an ethanol solution containing nano SiO, and performing infrared radiation curing to obtain the high-strength low-shrinkage composite yarn for spinning. The composite yarn has good mechanical strength, wear resistance and low contractibility, and the yarn has wide application due to the high breaking strength.

The invention discloses a wear-resistant floor concrete and a preparation method thereof, which is composed of 250-300 kg / m 3 , lithium slag powder 50~100kg / m 3 , magnesium fluorosilicate 1~3kg / m 3 , aluminum dihydrogen phosphate 0.5~2kg / m 3 , hydroxyapatite 0.5~5kg / m 3 , nano calcium sulfate 0.5~1kg / m 3 , crushed stone 1200~1400kg / m 3 , machine-made sand 700~900kg / m 3 , water reducing agent 5~10kg / m 3 , water 140~170kg / m 3 On the one hand, by improving the particle shape of machine-made sand, the matching effect between aggregates is fully utilized to form a dense skeleton structure; on the other hand, by introducing lithium slag powder, magnesium fluorosilicate, aluminum dihydrogen phosphate, hydroxyapatite, and nano-calcium sulfate, the density, wear resistance and crack resistance of concrete are improved, and the shrinkage can be effectively reduced. The resulting product has good workability, strong water retention capacity, strong surface wear resistance, and strong crack resistance.

This invention discloses a high-early-strength, low-shrinkage composite silicate cement and its preparation method, comprising: low-shrinkage silicate cement clinker, early-strength component, and gypsum component; the low-shrinkage silicate cement clinker is prepared from calcareous raw materials, siliceous-aluminous raw materials, ferrous raw materials, a first activator, and a mineralizer; its mineral composition includes: C3S 30-50 parts, C2S 20-40 parts, C3A 0.5-5 parts, and C4AF 10-25 parts; its particle size distribution characteristics are D10≥5μm, D90≤45μm, uniformity index of 1.2-1.6, and characteristic particle size of 25-30μm; the early-strength component is prepared from F-type fly ash or C-type fly ash, limestone, magnesium oxide, and a second activator; its mineral composition includes: C 20 A 13 M3S 350-65 parts, C2S 35-50 parts. The cement prepared by this invention not only has high early strength, but also has a small drying shrinkage rate.

The invention belongs to the technical field of high-performance cement concrete, and particularly relates to low-shrinkage hybrid fiber concrete and a use method thereof. The low-shrinkage hybrid fiber concrete is prepared by mixing cement, fly ash, sand, gravel, steel fibers, synthetic fibers, water and a water reducing agent according to the mass ratio of (410 to 390): (70 to 100): (780 to 750): (900 to 1100): (95 to 65): 1.1: (150 to 160): (8.9 to 7.5). According to the invention, the dispersibility of the steel fibers and the synthetic fibers can be ensured, and the workability of concrete construction is ensured. Hybrid fibers of the concrete have high tensile strength, development of bridge deck concrete cracks is effectively delayed, the fracture resistance of the concrete is improved, the elastic modulus of the concrete is also improved, and therefore the axial tensile strength of the concrete is also obviously improved; meanwhile, the shrinkage performance of the concrete is effectively improved, the durability of the concrete is improved, the service life of the concrete is greatly prolonged, other stress structures of the bridge are effectively protected, and then the overall service life of the bridge is prolonged.

The invention belongs to the technical field of polymer materials, and provides a nylon elastomer, a nylon elastomer foam material and a preparation method and application thereof, the intrinsic viscosity of the nylon elastomer under the conditions of 150 DEG C and 0.01 Hz is 200-50000 Pa.s; the characteristic temperature of the nylon elastomer is 120-170 DEG C, and the characteristic temperature represents the temperature at which the energy storage modulus is equal to the loss modulus of the nylon elastomer. Through the design of specific intrinsic viscosity and characteristic temperature, the nylon elastomer has excellent foamability, and a nylon elastomer foaming material prepared by foaming of the nylon elastomer is uniform in foam hole, small in foam hole diameter, stable in property, low in shrinkage rate, high in foaming ratio, high in rebound resilience and excellent in mechanical property; the comprehensive performance of the foam material is greatly improved, and the foam material has a wide application prospect.

The invention discloses low-shrinkage ultra-high performance concrete and a preparation method thereof, and belongs to the technical field of concrete. The shrinkage ultra-high performance concrete is prepared from the following components in parts by mass: 100 parts of cement, 25 to 100 parts of mineral admixture, 2.1 to 3.5 parts of high-performance water reducing agent, 5 to 10 parts of expanding agent, 0.12 to 0.2 part of thickening time control agent, 2.5 to 4 parts of reinforcing agent, 100 to 160 parts of sand, 1.5 to 3 parts of fiber and 18 to 30 parts of water, the mineral admixture is a product obtained by cofiring the high-aluminum solid waste and CaO at 800-900 DEG C and then carrying out shock cooling treatment. The low-shrinkage ultra-high-performance concrete has excellent compressive strength and tensile property, meanwhile, a large proportion of high-aluminum solid waste replaces part of cement and all silica fume in existing ultra-high-performance concrete, large chemical shrinkage caused by the cement and the silica fume in the hydration reaction process is greatly reduced, and the volume stability of a matrix is improved. A large amount of solid hazardous waste with high aluminum oxide content is used, so that the production and construction cost is reduced, and meanwhile, a method for comprehensively utilizing solid hazardous waste resources is provided.

The invention discloses a low-shrinkage styrene thermoplastic elastomer and a preparation method thereof, and belongs to the technical field of thermoplastic elastomers. The low-shrinkage styrene thermoplastic elastomer is prepared from the following raw materials: 20 to 30 parts of styrene-butadiene block copolymer, 10 to 20 parts of polystyrene resin, 30 to 40 parts of softening operation oil, 30 to 60 parts of modified nano calcium carbonate, 1 to 2 parts of lubricating dispersant and 1 to 2 parts of antioxidant. The preparation method comprises the following steps: sequentially putting the styrene-butadiene block copolymer and the softening operation oil into a high-speed stirrer; then putting polystyrene resin, modified nano calcium carbonate, a lubricant and an antioxidant into a high-speed stirrer together to obtain a premix semi-finished product; and adding the premix semi-finished product into an extruder, and melting, extruding and granulating the premix through the extruder to obtain a finished product. The low-shrinkage styrene thermoplastic elastomer prepared by the invention has excellent flame retardant property.

The invention relates to the technical field of mine filling materials, and provides a low-shrinkage steel slag powder mine filling cementing material and a preparation method and application thereof.The cementing material is prepared from, by weight, 30-40 parts of steel slag powder, 50-60 parts of mineral powder, 8-15 parts of desulfurized gypsum and 0-5 parts of excitant, the excitant is superfine cement clinker, and the specific surface area is larger than or equal to 600 m < 2 > / kg; through a cascade reaction path of early excitation, expansion compensation and continuous enhancement among the components such as the steel slag powder, the mineral powder and the desulfurized gypsum, the filling cementing material which is high in solid waste mixing amount, low in shrinkage and appropriate in strength and has environmental protection benefits and engineering applicability is realized, pollution and carbon are reduced, cost is reduced and benefits are increased for tailing treatment, and the filling cementing material is suitable for being used as a filling cementing material. And the comprehensive utilization way of the tailings and the metallurgical solid waste is further expanded.

The invention discloses a plastic-free low-shrinkage waterproof oil-proof barrier type modified acrylate emulsion and a preparation method thereof, the plastic-free low-shrinkage waterproof oil-proof barrier type modified acrylate emulsion comprises the following raw materials by mass: 3-12 parts of a nano dispersion, 13-42 parts of a hard monomer, 30-55 parts of a soft monomer, 3-10 parts of a silicon-containing monomer, 4-12 parts of a polyfunctional monomer, 0.1-3 parts of an initiator, and 2-13 parts of a reactive emulsifier; the modified acrylate emulsion is prepared from a nano dispersion, a hard monomer, a soft monomer, a silicon-containing monomer, a polyfunctional monomer, an initiator and a reactive emulsifier through soap-free emulsion polymerization. The plastic-free low-shrinkage waterproof oil-proof barrier emulsion is prepared through soap-free emulsion polymerization, the prepared emulsion is small in particle size, can form a dense film after being coated on the surface of paper, and has good barrier performance on water vapor, oil and the like; according to the plastic-free low-shrinkage waterproof oil-proof barrier emulsion, a polyfunctional structure, especially structures containing-COOH,-OH,-NH2,-NH-C (= O)-NH-and the like, is introduced into a molecular structure, so that the emulsion has good adhesion to paper-based fibers.

The invention discloses a low-shrinkage porous mullite ceramic photocuring additive manufacturing method which comprises the following steps: firstly, mixing a base material containing aluminum and silicon elements with a villiaumite catalytic phase to prepare composite ceramic slurry, preparing a ceramic green body through a photocuring additive forming process, and then preparing the low-shrinkage porous mullite ceramic through a temperature-controlled thermal degreasing and in-situ gas phase method sintering process. The porous mullite ceramic with low shrinkage rate is prepared. By using the villiaumite catalytic phase material, the printability and stability of the ceramic slurry are maintained, the sintering temperature in the heat treatment stage is reduced, the low-size shrinkage performance is obtained, and large-scale efficient additive preparation of the porous mullite ceramic structural part is easy to realize.

The invention relates to a low-shrinkage UV and moisture dual-curing adhesive and a preparation method, and belongs to the field of electronic adhesives, the low-shrinkage UV and moisture dual-curing adhesive comprises the following components by weight: 10-20 parts of urethane acrylate resin, 10-20 parts of a silane-terminated modified urethane acrylate polymer, 5-20 parts of a reaction type acrylate monomer, 1-5 parts of a curing agent, 1-5 parts of a curing agent, and 1-5 parts of a curing agent. The photoinitiator, the moisture scavenger, the catalyst, the filler, the fumed silica and the additive are sequentially arranged from 1 part to 2 parts, 0.5-2 parts, 0.5-1 part, 0.5-1 part, 0.5-1 part, 0.5-2 parts, 0-2 parts and 0.5-1 part. The UV and moisture dual-curing adhesive prepared by the invention has the advantages of extremely low curing shrinkage, high hardness and bonding strength, low thermal expansion coefficient and good storage stability, and is suitable for sealing of consumer electronics or an alignment process in the lens industry.

The present invention provides a low shrinkage hybrid steel fiber recycled aggregate ultra-high performance concrete and a preparation method thereof, and belongs to the technical field of concrete. The low shrinkage hybrid steel fiber recycled aggregate ultra-high performance concrete of the present invention has high strength, good toughness, low shrinkage, and at the same time has the advantages of low cost and green environmental protection. By replacing part of the cement as a cementitious material with a large amount of fly ash, not only can its volcanic ash activity and particle filling effect be fully exerted, but also carbon dioxide emissions can be reduced. The present invention uses aeolian sand and recycled fine aggregate to replace traditional quartz sand through grading optimization, and then reduces the shrinkage of ultra-high performance concrete by adding recycled coarse aggregate and utilizing the volume stabilization effect of recycled aggregate. Finally, long steel fibers are added to cooperate with fine steel fibers to improve the flexural toughness of ultra-high performance concrete.