10results about How to "Improve low temperature brittleness" patented technology

The invention discloses a modified asphalt composition, a preparation method thereof and a modified asphalt waterproof coiled material. The modified asphalt composition comprises the following raw material components in parts by weight: 40-50 parts of composite asphalt; 8 to 10 parts of softening oil; 5 to 7 parts of SBS (Styrene Butadiene Styrene); 1 to 1.5 parts of carbon fiber; 10 to 15 parts of rubber powder; 1-2 parts of an auxiliary agent; 15 to 25 parts of a filling material; wherein the carbon fibers and the SBS are interwoven to form a modified network, and the mass ratio of the carbon fibers to the SBS is 1: (4-6); the mass ratio of the carbon fibers to the composite asphalt is 1: (27-40); the mass ratio of the carbon fiber to the auxiliary agent is 1: (0.7-2). According to the modified asphalt composition, through the synergistic effect of the composite asphalt, the carbon fibers and the SBS, the mechanical property of the modified asphalt composition is guaranteed, meanwhile, the high-temperature stability of the modified asphalt composition is improved, and the influence on a waterproof material during thermal pavement of a pavement or a bridge deck can be effectively resisted.

The invention discloses a low-temperature-cracking-resistant composite PPR pipe and a preparation method thereof. The nucleating agent composite master batch comprises the following components in parts by mass: basic master batch and magnetic master batch, the basic master batch comprises homo-polypropylene resin and a modified nucleating agent, and the content of the modified nucleating agent is 3-6 wt.%; the magnetic master batch comprises polypropylene random copolymer resin, magnetic fibers and a modified nucleating agent, the content of the modified nucleating agent is 3-6 wt.%, and the content of the magnetic fibers is 3-5 wt.%. According to the composite PPR pipe, the polypropylene random copolymer resin serves as a matrix, the nucleating agent composite master batch is added, the nucleating agent composite master batch can be enriched on the surface of the PPR pipe under the action of an external magnetic field in the machining process, the surface toughness of the PPR pipe is improved, meanwhile, a protective layer is formed, and therefore the low-temperature brittleness of the PPR pipe is improved.

The invention relates to water-permeable colored asphalt concrete and a preparation method thereof, and belongs to the technical field of asphalt concrete.The water-permeable colored asphalt concrete is composed of colored modified asphalt and aggregate, and the mass ratio of the colored modified asphalt to the aggregate is (1-2): 10. The colored modified asphalt is composed of road petroleum asphalt, modified calcium carbonate whiskers, modified rubber powder, a composite anti-stripping agent and an inorganic pigment. According to the permeable colored asphalt concrete prepared by the invention, the Marshall stability is 8.39 to 8.91 kN, the compressive strength is 57.9 to 64.5 MPa, the water stability RMS is 97.5 to 98.4 percent, the TSR is 95.2 to 97.0 percent, the porosity is 18.4 to 21.6 percent, and the permeability coefficient is 61 to 70 mm / s.

The invention belongs to the technical field of PP alloy materials, and particularly relates to a preparation process of a modified PP alloy material. The modified PP alloy material is prepared from the following raw materials in parts by weight: 40 to 70 parts of PP, 10 to 20 parts of PA (Polyamide), 5 to 10 parts of LLDPE (Linear Low Density Polyethylene), 5 to 15 parts of compatilizer, 5 to 15 parts of flexibilizer, 20 to 40 parts of inorganic modifier, 0.1 to 0.5 part of lubricant and 0.1 to 0.2 part of antioxidant. According to the invention, other polymer materials are added for blending, the compatibilizer is added to improve the compatibility among the polymer materials, and a proper amount of the inorganic modifier is added, so that the impact resistance and low-temperature weather resistance of the modified PP alloy material can be improved while the mechanical properties of the modified PP alloy material are improved; the requirements of different fields on high-performance PP materials are met.

The invention belongs to the technical field of BOPP film materials, and particularly relates to a low-temperature-brittleness-resistant BOPP film, a preparation method and application. The film comprises an anti-adhesion layer, a corona treatment layer and a core layer, wherein the core layer is prepared from the following raw materials in parts by weight: 60-80 parts of homo-polypropylene, 18-39 parts of TPU elastomer and 1-2 parts of an antistatic agent; the anti-adhesion layer is prepared from the following raw materials in parts by weight: 68-85 parts of homo-polypropylene, 12-25 parts of modified polypropylene resin and 3-7 parts of an anti-adhesion agent; and the corona treatment layer is prepared from the following raw materials in parts by weight: 96-98 parts of homo-polypropylene and 2-4 parts of an anti-sticking agent.

The invention discloses a single-core solder wire and a preparation method thereof, and relates to the field of welding materials, the single-core solder wire comprises an alloy solder layer and a soldering flux layer which are sequentially arranged from outside to inside, and the alloy solder layer is prepared from 10-15 wt% of Bi, 0.5-1.5 wt% of Cu, 1-3 wt% of Ag, 0.05-0.35 wt% of Ti, 0.05-0.2 wt% of Zn, 0.01-0.2 wt% of Ni, 0.55-0.85 wt% of Sn-Be-Sb ternary alloy and the balance Sn. The scaling powder layer is prepared from modified rosin, organic acid, organic amine, a surfactant, an antioxidant, a corrosion inhibitor and an organic solvent according to a specific proportion. The prepared single-core solder wire is good in ductility, and the processing performance of the single-core solder wire in a low-temperature environment and the stability performance of a welding spot in the low-temperature environment can be improved.

This utility model relates to the field of traditional Chinese medicine processing technology, and discloses a medicinal material pulverizing device for preparing medicinal soups, including a processing shell and a support plate. The support plate is fixedly sleeved on the lower part of the outer wall of the processing shell, and a crushing component for pulverizing medicinal materials is installed in the upper part of the processing shell. During the crushing process, the water-cooling component cools the hollow pulverizing roller, effectively reducing the frictional temperature rise during pulverization, preventing the medicinal materials from softening and sticking together at high temperatures, and simultaneously enhancing the low-temperature brittleness of the medicinal materials, making them easier to pulverize, thereby improving pulverization efficiency and fineness. It also effectively prevents heat-sensitive components in the medicinal materials from being affected by high temperatures, ensuring the stability of the effective components. Simultaneously, a fan starts working, blowing air into the interior of the hollow pulverizing roller, significantly enhancing the heat dissipation effect. The forced airflow carries away the heat accumulated inside the hollow pulverizing roller, improving the heat dissipation and cooling effect.

The invention discloses a rubber waterproof coiled material and a preparation method and application thereof, and the rubber waterproof coiled material is prepared from master batch for the rubber waterproof coiled material. The master batch for the rubber waterproof coiled material is prepared from the following raw materials in parts by weight: 45 to 60 parts of styrene-ethylene / butylene-styrene copolymer, 10 to 15 parts of styrene-ethylene / propylene-styrene copolymer, 25 to 30 parts of thermoplastic polyolefin elastomer, 15 to 20 parts of ethylene-butylene-propylene copolymer, 0.5 to 1 part of antioxidant, 0.5 to 1 part of light stabilizer, 1 to 5 parts of pigment and 2 to 5 parts of rubber wear-resistant agent. The elastic recovery rate of the rubber waterproof coiled material can reach 80% or above, and a low-temperature bending test shows that the rubber waterproof coiled material can be suitable for a low-temperature environment with the temperature being lower than-40 DEG C, can resist the high temperature of 100 DEG C and can resist artificial weathering aging for not less than 2500h. And the construction application of the waterproof coiled material in a complex base plane and an extreme construction environment can be met.

The present application discloses an aviation nano-composite epoxy coating, which uses epoxy resin as the main resin, is obtained by grafting modified nano-SiO2 particles into a three-dimensional cross-linked network of a polyurethane curing agent, and reacting with a core-shell modified epoxy resin. The present application also provides a method for preparing the aviation nano-composite epoxy coating. The present application can solve the problems of poor temperature shock resistance and poor low-temperature flexibility of epoxy primers used in existing aircraft skins.

The application discloses a kind of composite PP-R pipe materials and preparation method and application thereof, it is related to PP-R pipe material technical field, the composite PP-R pipe material, including by inside to outside sequentially connected PP-R inner layer, impact resistance oxygen barrier layer and PP-R outer layer, the impact resistance oxygen barrier layer includes parylene, polyglycolic acid, compatibilizer.The composite PP-R pipe material adds impact resistance oxygen barrier layer as middle layer in it, the material of the impact resistance oxygen barrier layer uses the cooperation of parylene and polyglycolic acid (PGA), with excellent mechanical properties and gas barrier property, and can keep structural performance stable under low temperature environment below-10 DEG C, can be applied in PP-R pipe material system to improve its low temperature brittleness, improve low temperature impact resistance.