14results about How to "Not brittle" patented technology

The invention relates to the technical field of quick connector materials, and particularly discloses a high-stability nylon tube quick connector material and a preparation method thereof. The high-stability nylon tube quick connector material comprises the following raw materials in parts by mass: 50-100 parts of nylon 12, 5-10 parts of nylon 6, 1-3 parts of graphene oxide, 5-10 parts of styrene, 2-5 parts of maleic anhydride, 0.1-0.2 part of an initiator, 5-10 parts of polyethylene, 1-2 parts of polyethylene-maleic anhydride, 1-2 parts of triphenyl phosphate, 1-2 parts of a lubricant, 1-2 parts of a waterproof agent and 1-2 parts of an antioxidant. The oxygen index of a formed product can reach 38.6% or above, the flame retardant grade can reach the V-0 grade of UL-94, meanwhile, the mechanical strength is high, embrittlement is not prone to occurring in the long-term use process, the technology is simple, reaction conditions are mild, and the method is suitable for large-scale industrial production.

The invention discloses a soda nepheline dental glass ceramic, a chemically strengthened soda nepheline dental glass ceramic and a preparation method and application thereof, and relates to the field of glass ceramics, the soda nepheline dental glass ceramic comprises the following components by molar percentage: 40-55% of SiO2, 15-25% of Al2O3, 15-25% of Na2O, 0-5% of K2O, 1-9% of Li2O, 0-4% of MgO, 0-4% of CaO, 1-15% of ZrO2, 0.5-5% of B2O3, 0.3-5% of P2O5, 3% of TiO2, 0.1-2% of a clarifying agent and 0.01-3% of an oxide pigment; the clarifying agent comprises at least one of SnO2, NaCl and Sb2O3. The nepheline dental microcrystalline glass is good in toughness, high in bending strength, high in hardness, good in wear resistance, good in chemical stability and good in biocompatibility, and can be applied to the field of high-performance dental materials.

The invention discloses a high-impact-resistance cold-bonding type multipurpose polyester adhesive as well as a preparation method and application thereof, and belongs to the technical field of adhesives. The polyester adhesive comprises the following components in percentage by mass: 45%-65% of unsaturated polyester resin, 0.2%-5% of a chain extender, 0.2%-5% of an accelerant, 1%-5% of a dispersing agent, 1%-5% of an organic filler, 20%-30% of an inorganic filler, 0.2%-5% of an anti-gel inhibitor, 5%-10% of a cross-linking agent, 1%-5% of a defoaming agent, 1%-1.5% of a curing agent, 3%-10% of a toughening agent and 1%-5% of a flatting agent. The preparation method comprises the following steps: proportioning unsaturated polyester resin, a chain extender, an anti-gel inhibitor, a cross-linking agent, a dispersing agent and the like according to a certain proportion, adding other auxiliaries, and uniformly stirring to obtain the cold-sticking type multipurpose polyester adhesive. After the curing agent is added into the prepared polyester adhesive, the polyester adhesive can react within a certain period of time, and after the adhesive is spontaneously heated to reach the curing temperature, all the components quickly react for curing, so that a cured product has relatively good mechanical property, toughness, heat resistance and corrosion resistance.

The invention relates to the technical field of fabrics, in particular to an aerogel chemical fiber cotton fabric production process which comprises the following steps: (1) washing and drying a chemical fiber cotton fabric, and then performing normal-pressure dielectric barrier discharge plasma modification treatment to obtain a modified chemical fiber cotton fabric; (2) adding water into the nano silicon dioxide aerogel powder, stirring and performing ultrasonic treatment while adding water to obtain a nano silicon dioxide aerogel aqueous solution, and continuously adding waterborne polyurethane glue and a coupling agent while stirring and performing ultrasonic treatment to obtain nano silicon dioxide aerogel finishing glue; (3) immersing the modified chemical fiber cotton fabric into the nano silicon dioxide aerogel finishing glue, and rolling and drying to obtain the aerogel chemical fiber cotton fabric. A layer of aerogel covering body is formed on the fiber surface of the chemical fiber cotton fabric, so that the chemical fiber cotton fabric with multiple effects of heat preservation, flame retardance and hydrophobicity is obtained.

This invention belongs to the field of coating technology and provides a wear-resistant coating for drone shells and its preparation method. The raw materials of the coating include: hydrogenated bisphenol A epoxy resin, vinyl-terminated fluorinated polybutadiene resin, core-shell powder, aluminum borate nanofibers, polyetherimide micro powder, wear-resistant additives, silane coupling agent KH-792, light stabilizer, leveling agent and environmentally friendly solvent. The preparation method includes: (1) mixing hydrogenated bisphenol A epoxy resin and vinyl-terminated fluorinated polybutadiene resin to form a resin matrix; (2) first adding core-shell powder and aluminum borate nanofibers to the resin matrix for dispersion; after cooling to 25-30℃, adding other raw materials, stirring and defoaming to obtain the finished product. This coating has high wear resistance, wind and sand erosion resistance, low temperature crack resistance, microcrack self-repair, strong UV aging resistance and high adhesion, which can significantly improve the long-term service stability and service life of drone shells in complex and harsh environments such as high altitude, wind and sand, high and low temperature alternation, and strong ultraviolet radiation.

The present invention relates to a preparation method of an optical fiber ceramic ferrule, which comprises the following steps: S01: performing surface hydroxyl modification treatment on nano zirconium oxide composite powder to obtain surface hydroxyl modified ceramic powder; S02: performing addition reaction on octavinyl POSS and isocyanate acrylate to obtain isocyanate POSS; S03: mixing and kneading the surface hydroxyl modified ceramic powder with thermoplastic resin, plasticizer, lubricant and surfactant to obtain a colloid substance A; then mixing and kneading isocyanate POSS, polyoxymethylene resin and thermoplastic resin to obtain a colloid substance B; performing reaction injection molding on the two, and then performing degreasing and sintering treatment to obtain the optical fiber ceramic ferrule. The preparation method of the present invention solves the problems of long degreasing time, low injection blank strength and difficulty in demoulding in the injection molding process of existing thermoplastic organic carrier ceramic powder, and can meet the preparation requirements of high-performance optical fiber ceramic ferrule.

The invention discloses a polyethylene clean film, a packaging bag and a preparation method thereof, and relates to the technical field of polyethylene packaging bags, the polyethylene clean film comprises the following components by weight: 75-90 parts of low density polyethylene, 4.5-6 parts of a bacteriostatic agent, 2.5-3.6 parts of functionalized graphene oxide, and 2-3.2 parts of modified nano zinc oxide. According to the polyethylene clean film, the packaging bag and the preparation method of the polyethylene clean film, the bacteriostatic agent and the polyethylene chain interact to form hydrogen bonds or physical entanglement, so that molecular chains are combined more tightly, the tensile strength of the packaging bag is improved, and the risk of breakage is reduced; due to the addition of the bacteriostatic agent, the flexibility and the sliding property of a molecular chain are improved, energy can be dissipated through chain segment movement when the packaging bag is subjected to external force, the impact resistance and the flexibility are improved, and the possibility of embrittlement is reduced; the bacteriostatic agent can also form a barrier layer in a polyethylene matrix or disorganize a gas diffusion channel, increase the tortuosity of the gas diffusion channel and reduce the permeability of gases such as oxygen and carbon dioxide.

The application relates to the technical field of sealing rings, and particularly discloses a low-temperature-resistant and plasma-resistant combined sealing ring and a preparation method thereof. The combined sealing ring comprises a low-temperature-resistant rubber inner core and a corrosion-resistant rubber outer layer, the corrosion-resistant rubber outer layer is fully coated on the surface of the low-temperature-resistant rubber inner core, the glass transition temperature of the low-temperature-resistant rubber inner core is lower than-40 DEG C, the inner and outer cross section height ratio and the outer layer thickness are constrained to meet the sealing requirement of the application scene, the inner core is separately formed first, then the outer layer is injection molded and co-vulcanized with the inner core, and finally the obtained combined sealing ring not only has excellent low-temperature-resistant and plasma-resistant capacity, but also can maintain a relatively long service life in the low-temperature-normal-temperature cycle.

The application relates to the technical field of fireproof materials, in particular to a flame-retardant ABS composition and a preparation method thereof; the flame-retardant ABS composition comprises the following components in parts by weight: ABS particles 1000-1400 parts, polysiloxane 350-450 parts, dimethyl silicone oil 100-200 parts, a flame retardant 300-600 parts, inorganic fillers 100-300 parts, a crosslinking agent 5-40 parts, a coupling agent 2-20 parts, a catalyst 0.5-2 parts and an intumescent agent 1-2 parts; the ABS particles in the composition serve as the only hard aggregate, have high size consistency and the same density, and are not prone to sedimentation; the ABS particles are light and rigid, are not prone to brittle fracture after being extruded, and have flame-retardant properties; when being pushed to an ignition point, the ABS particles can cover the fire source together with the gel, so that the purpose of blocking combustion is achieved.

The invention belongs to the technical field of epoxy adhesives, and particularly relates to an epoxy adhesive slow-binding agent with temperature control performance. The epoxy glue slow-binding agent is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin; 60-80 parts of an organic phase change material; 40 to 60 parts of filler; 10-30 parts of a curing agent; 10 parts of a diluent; and 10 parts of carboxyl-terminated liquid nitrile rubber. According to the invention, the carboxyl-terminated liquid nitrile rubber is used as a flexibilizer to enhance the flexibility of the epoxy adhesive slow-adhesion agent, and the moisture latent curing agent and the organic phase change material are used, so that the pot life of the slow-adhesion agent can be prolonged and the curing period can be shortened by utilizing the heat storage and heat release of the phase change material; and the engineering requirements of long working life and short curing period of the retard-bonded prestressed tendon can be met.

The invention discloses a preparation method of a high-performance ecological membrane based on RPVB (Reactive Polyvinyl Butyral), which is characterized by comprising the following steps: raw material treatment: cleaning, crushing and separating recycled automobile windshield laminated material RPVB; glue blending, wherein the RPVB particles and environment-friendly glue are mixed according to the mass ratio of 1: (0.9-1.1); coating and transferring; drying and curing; carrying out post-treatment; the waste automobile windshield laminated material RPVB is used as a main raw material, high-value utilization of waste resources is achieved, environmental pollution of solid waste is reduced, the problem of environmental pollution in the production and use process is avoided, and by optimizing the formula and the process, the production cost is reduced, and the production efficiency is improved. The ecological membrane shows excellent performance in the aspects of strength, wear resistance, flexibility, air permeability and the like, the used environment-friendly glue is waterborne polyurethane emulsion meeting the REACH standard of European Union, a plasticizer is not contained, a full-water-based technology is matched, it is ensured that no volatile organic compound (VOC) is discharged in the production process, and the ecological membrane is more friendly to the human body and the environment.

The application provides a TiAl alloy rich in large-size alpha2 phase twins, in particular, second-type twins, which contains 34-36 at.% of Al, 7-8 at.% of Nb, and the balance of Ti and inevitable impurities. The application also provides a method for preparing the TiAl alloy rich in large-size alpha2 phase second-type twins, which comprises the following steps: melting the alloy by a vacuum arc furnace to obtain a cast ingot, carrying out homogenization treatment at 1200 DEG C for 9-12 hours, and then quenching after being kept at 900-1000 DEG C for 3-6 hours to obtain the TiAl alloy rich in large-size alpha2 phase second-type twins. A large number of second-type twins with large size can be generated in the alloy, which provides suitable research materials for the research on deformation twins, solves the problem that the deformation twins are difficult to be characterized and researched, and provides a basis for further strengthening of the alloy performance.

The invention provides a porous polybenzimidazole enhanced polyphenylene sulfide composite diaphragm for hydrogen production by alkaline electrolysis of water and a preparation method of the porous polybenzimidazole enhanced polyphenylene sulfide composite diaphragm, and belongs to the technical field of hydrogen production by electrolysis of water. The porous polybenzimidazole enhanced polyphenylene sulfide composite diaphragm is prepared by the following steps: dissolving an organic polymer material based on a polybenzimidazole skeleton in an organic solvent, then adding a pore-forming agent and a plasticizer, stirring, dissolving and uniformly mixing to obtain a membrane casting solution, and uniformly coating a polyphenylene sulfide diaphragm with the membrane casting solution to obtain the composite diaphragm. And drying the composite diaphragm in vacuum, soaking in water, taking out, and soaking in alkali liquor to obtain the composite diaphragm. The porous polybenzimidazole enhanced polyphenylene sulfide composite diaphragm prepared by the invention has good mechanical property and binding force, good hydrophilicity and lower surface resistance, and can be further applied to hydrogen production by alkaline electrolysis of water.

The application relates to the technical field of plastics, in particular to a preparation method and application of low-temperature-resistant degradable plastics. The low-temperature-resistant degradable plastics contain, in parts by weight, carboxylated polycaprolactone C-PCL: 80-90 parts, modified lignin: 15-20 parts, nano-cellulose: 5-10 parts, crosslinking agent: 2-3 parts, and antioxidant: 0.3-0.5 parts. The modified lignin is prepared by grafting epoxy groups after the alkaline lignin is protected by p-benzene dicarboxaldehyde and hydroxylated; the crosslinking agent is prepared by condensation reaction of vanillin and hexanediamine, and the imine bond contained in the crosslinking agent endows the material with a good degradation rate under acidic conditions. The low-temperature-resistant degradable plastics prepared by the application have good low-temperature mechanical properties and excellent degradation speed under acidic conditions in the case of guaranteeing a certain service life, and are suitable for application to agricultural mulching films in cold environments.