9results about How to "High softening temperature" patented technology

This invention discloses a sealing glass with good wettability to titanium alloys, comprising the following components in weight percentage (wt.%): 30-50 wt.% SiO2, 1-5 wt.% Al2O3, 10-30 wt.% B2O3, 10-20 wt.% TiO2, 5-9 wt.% CaO, 1-5 wt.% SrO, 0.1-0.5 wt.% BaO, 2-8 wt.% ZrO2, 1-2 wt.% La2O3, 0-1 wt.% CeO2, and 0.1-0.5 wt.% CoO. This invention also provides a method for preparing sealing glass, comprising the following steps: weighing raw materials according to a mass percentage of a glass composition, mixing them evenly, heating and melting them into a glass melt; after the glass melt is uniform, pouring the molten glass melt into deionized water for rapid cooling and quenching, then drying to obtain glass melt fragments; then ball milling the dried glass fragments into glass powder, drying and sieving to ensure the glass powder particle size is less than 100 micrometers, thus obtaining the desired sealing glass material powder. This invention has a linear thermal expansion coefficient of (50-70)×10⁻⁶ in the range of 20-300 °C. ‑7 / ℃; glass softening temperature is 610-660℃; advantages include chemical stability of level IV or above.

The present invention relates to a polyurethane resin composition including an isocyanate group-terminated urethane prepolymer (E) and a neutralizer (F). The isocyanate group-terminated urethane prepolymer (E) contains a reaction product of a polyol (A) containing a polycarbonate polyol (B) having an average number of hydroxyl functional groups exceeding 2, an organic acid (C), and a polyisocyanate (D), in which a total content of urea groups in the polyurethane resin composition is 0.01 to 0.80 mmol / g with respect to a sum of a mass of the isocyanate group-terminated urethane prepolymer (E) and a mass of the chain extender (G), and the polycarbonate polyol (B) has a deemed average number of functional groups of 2.0 to 3.90.

The utility model relates to the technical field of grinding wheel structures, in particular to a light-color dust-free grinding wheel structure which comprises a grinding wheel structure body, stable installation mechanisms are arranged on the surfaces of the grinding wheel structure body, a fixing ring and a frame body, and a light-color dust-free mechanism is arranged on the surface of the grinding wheel structure body. And heat dissipation and chip removal mechanisms are arranged on the surfaces of the grinding wheel structure body and the fixing ring. The grinding wheel structure is more convenient to operate, the structural strength of the grinding wheel structure body and the grinding material layer can be improved when the grinding wheel structure is used, efficient heat dissipation can be conducted when the grinding wheel structure is used, the phenomenon that the grinding wheel structure body and the grinding material layer are broken during working is reduced, and the service life of the grinding wheel structure is greatly prolonged; in addition, when the grinding wheel structure is used, the grinding and cutting performance of the grinding wheel structure body and the grinding material layer can be greatly improved, sufficient curing and crosslinking can be achieved, the good grinding and cutting performance is obtained, meanwhile, the grinding reaction is decomposed, and slag is reduced.

The invention belongs to the technical field of road paving materials, and particularly relates to a preparation method of a cementing material for cold-mixed colored permeable asphalt, and the preparation method comprises the following steps: 1) under a stirring condition, firstly adding epoxy resin and allyl glycidyl ether into a mixing kettle, stirring and mixing, slowly adding a plasticizer, and stirring and mixing; (2) sequentially adding heavy calcium carbonate, talcum powder and pigment, and stirring until the materials are uniformly dispersed without particles and bubbles, so as to obtain the component A; (3) uniformly mixing the component A and the component B under a stirring condition according to the weight ratio in the claim 1 to obtain a cementing material; and the component B is an alicyclic amine curing agent. The cementing material prepared by the method disclosed by the invention has the advantage of high water permeability, and also has excellent durability and rutting resistance.

This invention provides a high-flatness copper-nickel-tin-zinc alloy and its preparation method, belonging to the field of copper alloy manufacturing technology. The high-flatness copper-nickel-tin-zinc alloy provided by this invention, by mass percentage, comprises the following chemical composition: Ni: 0.2-3.0%, Sn: 0.2-2.0%, Zn: 0.05-0.2%, Fe: 0.01-0.1%, P: 0.02-0.08%, Nb: 0.05-0.28%, Ta: 0.05-0.2%, La: 0.02-0.1%, and the balance Cu. The results of the examples show that the copper-nickel-tin-zinc alloy of this invention has a tensile strength >600 MPa and an elongation A... 11.3 The heat shrinkage rate is 5-7%, the hardness is >180HV, the conductivity is ≥40%IACS, the bending rate is 7-8mm / m, the flatness is ≤0.05mm, and the heat shrinkage rate is ≤0.006%.

The present invention relates to a thermoplastic composition comprising an aromatic polycarbonate and a copper chromium spinel laser direct structuring additive. The composition comprises: a) 85 to 95% by weight of an aromatic polycarbonate; the present invention relates to a composition comprising, by weight, b) 2-15% of a copper-chromium spinel laser direct structuring additive, c) 0.05-5% of a flame retardant comprising a flame retardant salt or an organic flame retardant, d) 0.1-2% of an acid-modified polymer, e) 0-5% of a siloxane-based rubber. The invention also relates to a molded article comprising said thermoplastic composition, to a method for producing a circuit carrier using said molded article, and to a circuit carrier obtained by said method.

The invention discloses a transparent sapphire ceramic connecting method based on glass solder, and belongs to the technical field of welding. The method comprises the following steps: preparing glass solder powder from two pieces of sapphire ceramics to be welded according to a route of ball milling, drying, founding, water quenching, ball milling, drying and sieving, pressing the glass solder powder into sheets, and presintering and densifying; placing the glass solder piece between the two pieces of to-be-welded ceramic for assembly; the assembled sample is put into a muffle furnace to be heated to the welding temperature, and rapid cooling is conducted after heat preservation is conducted for a certain time; and the cooled connector is placed in the muffle furnace again for annealing, and then the whole connecting process is completed. The glass solder comprises the following components in percentage by weight: 30%-40% of RE2O3, 5%-10% of Al2O3, 30%-40% of SiO2, 10%-20% of B2O3, 5%-10% of BaO and 5%-10% of K2O. According to the method, the sapphire ceramic joint with high strength and high light transmittance can be obtained.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a heat-resistant polylactic acid-based degradable photo frame material and a preparation method thereof. The preparation method comprises the following steps: S1, preparing modified lignin by taking lignin and bromododecane as raw materials, then preparing benzene ring-containing polylactic acid by taking the modified lignin and D-lactide as raw materials, and finally performing surface grafting treatment on the benzene ring-containing polylactic acid to obtain modified polylactic resin; s2, adding the modified polylactic resin, poly (butylene succinate), talcum powder, an auxiliary agent and an antioxidant into a stirring kettle, and heating and stirring to obtain a mixture; and S3, carrying out extrusion molding on the mixture, and cooling to obtain the heat-resistant polylactic acid-based degradable photo frame material. Through the synergistic effect of the components, the composite material is ensured to have good heat resistance, and the impact strength is remarkably improved.

The invention relates to the technical field of liquid crystal panels, in particular to a glass tube for a UVA ultraviolet fluorescent lamp used in a liquid crystal alignment process and its application. The components and mass fractions of the glass tube for the UVA ultraviolet fluorescent lamp are specifically as follows: SiO2 86.938% to 92.938%, CaO 0.035%, Na2O 4.263% to 7.263%, Al2O3 2.433% to 4.433%, K2O 0.497% to 0.997%, P2O5 0.070%, SO3 0.060%, Fe2O3 0.064% to 0.144%, TiO2 0.071%, Cl 0.081% to 0.281%, ZrO2 0.094%, and ZnO 0.004%. The glass tube of the invention can produce a T12UVA ultraviolet fluorescent lamp suitable for liquid crystal light alignment, and the manufactured ultraviolet fluorescent lamp has better light decay characteristics and lifespan.