41results about How to "No reduction in mechanical properties" patented technology

The invention discloses an anti-glare flame-retardant polycarbonate material which comprises the following components by weight percent: 85-95 percent of polycarbonate, 2-12 percent of flame retardant, 0.1-1 percent of flame-retardant synergist, 0.1-5 percent of anti-glare agent, 0.3-2 percent of anti-ultraviolet agent, 0.05-3 percent of blue light absorbent, 0.2-3 percent of antioxidant and 0.2-2 percent of lubricating agent. The anti-glare flame-retardant polycarbonate material not only has an excellent anti-glare function, but also has higher light transmittance, and is capable of absorbing the blue wave band of the LED lighting spectrum at the same time. The invention further discloses a preparation method of the anti-glare flame-retardant polycarbonate material, which comprises the following steps: firstly preparing flame-retardant masterbatches, organic silicon microbead anti-glare masterbatches and blue light absorption masterbatches, and then preparing the anti-glare flame-retardant polycarbonate material, so that the performance anti-glare flame-retardant polycarbonate material is improved. The anti-glare flame-retardant polycarbonate material is particularly suitable for preparing an optical housing for LED lighting.

The invention discloses a method of medical nickel titanium alloy differential arc oxidation treatment, which comprises the following steps: (1) pre-treating surface; (2) putting into hydraulic fluid; choosing NiTi ally as positive pole and loading trough as negative pole; treating; (3)washing; drying; getting the product. This invention possesses simple method, which can inhibit discharging of Ni ion in nickel titanium alloy and reinforce safety.

The invention discloses a low addition type halogen-free and flame-retardant polylactic acid composite and a preparation method thereof. The composite is prepared from polylactic acid, a flame retardant, an optional flame retardant additive, an optional antioxidant and an optional lubricant, wherein the flame retardant is a phosphate, phosphamide, phosphoryl ester or phosphoramidate compound; the flame retardant additive is inorganic filler or organically modified inorganic filler. The preparation method of the polylactic acid composite comprises the following steps: polylactic acid is dried under vacuum and uniformly mixed with the flame retardant, the optional flame retardant additive, the optional antioxidant and the optional lubricant, and the mixture is placed in a twin-screw extruder for melt blending and extrusion pelletizing. The low addition type halogen-free and flame-retardant polylactic acid composite is low in adding quantity of the flame retardant, good in flame retardance and environment-friendly, and the mechanical properties are not reduced but are even increased; the preparation method is simple, convenient, fast, low in cost and suitable for industrial production.

The invention provides a soybean-oil-based flame-retardant plasticizer, and a preparation method and application thereof. The soybean-oil-based flame-retardant plasticizer is prepared from diethyl phosphate and epoxidized soybean oil by reaction. The soybean-oil-based flame-retardant plasticizer is prepared by adopting a structural modification method; diethyl phosphate containing a flame-retardant element P is added into the structure of soybean oil; the obtained soybean-oil-based flame-retardant plasticizer is applied in preparation of a flame-retardant type polyvinyl chloride product; and under the condition of no loss of mechanical performance, the plasticizer has higher flame-retardant property, and oxygen index can reach 24 to 33%. The soybean-oil-based flame-retardant plasticizer provided by the invention has extensive application prospects in the fields like plastics, rubbers, military products, textiles, conveyer belts and various building materials which have high requirements for flame-retardant performance.

The invention discloses a nanometer magnesium hydroxide flame retarding silicon rubber composite material and a preparation method thereof. The composite material comprises the following components in parts by weight: 100-120 parts of phenyl silicon rubber, 8-10 parts of diphenyldimethoxysilane, 10-20 parts of nanometer magnesium hydroxide, 5-30 parts of fumed silica, 2-4 parts of cyclotrisilazane, 3-6 parts of montmorillonite, 0.3-0.6 part of chloroform, 3-8 parts of surfactant and 1 part of vulcanizing agent. The composite material provided by the invention has excellent flame retarding property and the mechanical property of the composite material is not reduced at the same time; and the preparation method is simple and easy to operate.

Foam products with densities between 0.10 and 0.28 are obtained by reacting at least one polyol with at least one isocyanate-prepolymer, in the presence of an amount of expandable microspheres within the range of 0.5 to 10% by weight on the weight of said polyol and an amount of expanding agent which is from 0.5 to 4,0 times the amount normally used for such polyol/isocyanate-prepolymer systems, and carrying out the polymer expansion step at a temperature which is sufficient to cause the substantially simultaneous expansion of the microspheres.

The present invention discloses microcellular fibers, in which microcells are formed with a density of more than 10<7>cells/cm<3> with a supercritical fluid introduced into fiber forming polymers and have a rate of volume expansion of 1.2 to 50, a ratio of microcell length to microcell diameter of more than 2 and a monofilament diameter of more than 5 m. The microcellular fibers provide high and uniform cell densities and are good in the rate of volume expansion and the ratio of cell length to cell diameter, thus they are very excellent in lightweight feeling and touch. The microcellular fibers are made by a method for making microcellular fibers, wherein a supercritical fluid is introduced into an extruder upon melting and mixing fiber forming polymers in the extruder, to thus prepare a single-phase solution of molten polymer and gas, then the single-phase solution of molten polymer and gas is extruded (spun) through spinneret of spinning pack by subjecting the single-phase solution to a rapid pressure drop, to thus make microcellular extrusion materials, the microcellular extrusion materials are rapidly cooled by a cooling medium, and then they are wound at a winding speed of 10 to 6,000m/min so that a spinning draft can be 2 to 300.

The invention provides a non-asphalt-based polymer self-adhesive waterproof coiled material. According to the non-asphalt-based polymer self-adhesive waterproof coiled material, the tensile strength is 5.1-5.4 MPa, the elongation at break is 706-716%, and when the material is folded by15 degrees 5 times, the tensile strength at the bent portion is 4.9-5.2 MPa, and the elongation at break is 688-692%; the waterproof coiled material comprises a polymer homogenizing sheet layer, wherein the polymer homogenizing sheet layer is prepared from LDPE, HDPP, melamine and salt thereof, waste reclaimed rubber powder, start-type SBS, rosin modified phenolic resin, polyacrylonitrile fibers, a heavy-polymer modifier and an accelerant. The non-asphalt-based polymer self-adhesive waterproof coiled materialhas high resilience and a significant sound absorption and noise reduction effect; the bending performance is excellent, water leakage does not occur even when the folding angle is 15 degrees, the mechanical performance of the bent portion is basically not lowered, and the non-asphalt-based polymer self-adhesive waterproof coiled material is particularly suitable for water proofing for pipelines,tunnels, bridge culverts and other curved-surface projects.

The invention discloses a preparation method of thermal expansion type polyurethane. The preparation method comprises the following steps: adding a raw material modified expanding agent, a halogen-containing flame retardant and a thermoplastic polyurethane elastomer into an internal mixer according to a weight ratio of (2-4): (1-2): (35-45), performing blending, and carrying out hot press moldingto obtain the thermal expansion type polyurethane. The defects in prior art are overcome. The flame retardant has relatively small influence on the mechanical properties of polyurethane, and has favorable flame-retardant effect.

The invention relates to a formaldehyde catalytic purification fibre and a preparation method thereof. The catalytic fibre prepared according to the invention comprises the following required specific substance components in parts by mass: 100 parts of polymers, 20-50 parts of MnO2 catalytic particles, 0.2-1.5 parts of coupling agent, 0.1-0.5 part of antioxygen and 0-50 parts of plasticizer. The indoor formaldehyde catalytic fibre provided by the invention is not needed to be subjected to treatment on toxic organics, has no secondary pollution, is easy to industrially produce, is low in cost,is simple in preparation process, enables the utilization ratio of the catalyst to be increased, ensures high formaldehyde removal speed and removal ratio, is easy to weave and form, has high soapingdegree, and can be used for a long term; and abundant mineral products are used as the selected catalyst.

The invention discloses a zinc alloy containing Te and Os for eliminating white spots and black spots by steel hot-dip galvanizing and a processing technology thereof. The zinc alloy comprises, by weight, 0.8-1.0wt.% of Ba, 0.2-0.4wt.% of Te, 0.1-0.3wt.% of Os, 3.0-4.0wt.% of In, 0.5-0.8wt.% of W, 4.0-6.0wt.% of Sn, and the balance Zinc. According to the zinc alloy, a galvanizing layer without a phase S can be obtained, and the white spots and the black spots of a coating can be inhibited.