37results about How to "Excellent low temperature impact resistance" patented technology

The invention relates to polyester elastomer composition and a preparation method thereof, which belongs to the chemical industry technology field. The composition comprises components with following proportion by weight: 60-100 parts of polyester elastomer, 0.01-10 parts of epoxy compound, 0-10 parts of poly carbodiimide compound, 0-5 parts of acid anhydride grafting body, 0-40 parts of toughened high polymer compound, 0-3 parts of nucleating agent, 0-5 parts of compatiblizing agent, and 0.1-1 part of antioxidant. The components are evenly mixed by adopting a high speed mixer, then the extrusion granulation is performed through a double screw, the combined properties of the prepared polyester elastomer composition are fine, and the high and low temperature impact properties under the high modulus are outstanding.

A polyproplylene-based resin composition for powder slush molding which is a mixture of a polypropylene homopolymer, copolymer, or terpolymer; an olefin rubber; a styrene rubber; a process oil; and a polypropylene wax, wherein the composition is excellent in low-temperature impact resistance and heat resistance and has no offensive odor. The composition can be formed by a cryofreeze pulverization method in the presence of liquid nitrogen into a powder having an average particle size of 200 to 300 μm suitable for powder slush molding. The powder can be adhered to a polyurethane foamed layer and a surface treating agent without a primer coating. The powder is particularly suitable for forming the interior surface for manufacture of an automobile surface such as an instrument panel.

The invention discloses a polypropylene composition. The polypropylene composition includes an ethylene-propylene random elastic copolymer composition composed of an ethylene-propylene random copolymer with a melt index of 0.5 to 5 g/10 min and 0.5 to 10 wt% of ethylene and an ethylene-propylene elastic polymer with 25 to 75 wt% of ethylene and further includes a beta-crystal generating agent. The polypropylene composition has the characteristics of excellent impact resistance and overpressure resistance and is applicable to preparation of pipelines with the characteristics of improved flexibility, impact resistance at low temperature and overpressure resistance at high temperature.

The invention relates to a glass-fiber-reinforced flame-retardant polycarbonate composite material, and a preparation method and applications thereof. The glass-fiber-reinforced flame-retardant polycarbonate composite material comprises, by mass, polycarbonate resin of 10 to 80%, silicone chemically modified polycarbonate of 5 to 80%, silicone toughening agent of 1 to 8%, glass fiber of 5 to 30%,silicone flame retardant of 0.2 to 2%, sulfonate flame retardant of 0.1 to 1%, and an auxiliary agent of 0.4 to 3%. The glass-fiber-reinforced flame-retardant polycarbonate composite material possesses excellent low temperature impact resistance, flame resistance, rigidity, heat resistance, and hydrolysis resistance, contains no halogen, and is friendly to the environment.

A laminated tube comprising at least two layers and having an (a) layer including an aliphatic polyamide composition (A), and a (b) layer including a semi-aromatic polyamide composition (B) including a specific semi-aromatic polyamide (B1), wherein the aliphatic polyamide composition (A) includes a specific amount of an aliphatic polyamide (A1) and a specific amount of an elastomer polymer (A2) containing an unsaturated compound having a carboxyl group and/or an acid anhydride group, and the product, per 1g of the aliphatic polyamide composition (A), of the concentration [X] of the terminal amino group of the aliphatic polyamide (A1) and the total concentration [Y] of the carboxyl group and acid anhydride group of the elastomer polymer (A2) is a specific amount.

The invention aims to provide a thermoplastic resin composition having excellent mechanical physical property, especially excellent surface impact strength at low temperature, characterized in that the thermoplastic resin composition having excellent impact resistance at low temperature comprises 99% to 50% by weight of thermoplastic resin (composition A) and 1% to 50% by weight of block copolymer (composition B) composed of S block with polystyrene as the main composition, B block with poly (1,4-butadiene) as the main composition and M block with polymethylmethacrylate as the main composition, and the block copolymer includes at least one binding unit selected from a group consisting of S-B-M, M-S-B-S-M and M-B-S-B-M.

The present invention provides a low-temperature-impact-resistant epoxy adhesive composition, which comprises: at least two epoxy resins; at least a bifunctional epoxy diluent; at least three toughening agents, wherein the toughening agents at least comprise a liquid rubber toughening agent having a core-shell structure, an epoxy resin modified nitrile butadiene rubber, and a ketoxime-terminated reactive polyurethane elastic prepolymer; at least an inorganic filler; at least a water removing agent; at least a thixotropic agent; at least a thermally-activated latent curing agent; and at least acuring accelerator. According to the present invention, the two different epoxy resins are used as the raw materials, and the composite toughening agent at least comprising the liquid rubber toughening agent having the core-shell structure, the epoxy resin modified nitrile butadiene rubber and the ketoxime-terminated reactive polyurethane elastic prepolymer is added, such that the obtained epoxyadhesive composition has good low-temperature-impact resistance.

The invention relates to a low-temperature-resistant, damp-heat-resistant and flame-retardant PC (polycarbonate) material for a charging gun casing and a preparation method of the PC material. The PCmaterial is prepared from components of raw materials in parts by weight as follows: 100 parts of PC, 4-6 parts of a flame retardant, 0.5-1 part of a flame retardant synergist, 3-4 parts of a low-temperature-resistant flexibilizer, 0.5-1.5 parts of poly[nitrilo(diphenoxyphosphoranylidyne)], 0.2-0.4 parts of an anti-drip agent, 0.3-0.6 parts of an ultraviolet light absorber and 0.3-0.5 parts of anantioxidant. The raw materials are put in a high-speed mixer to be mixed, then the mixture is extruded by a double-screw extruder and granulated by a granulator, and the PC material can be obtained. The flame-retardant PC material has excellent low-temperature impact resistance, excellent damp and heat ageing resistance and excellent heat resistance, is particularly applicable to the field of thecharging gun casings used in changeable, harsh and complicated environments and has excellent safety protection capability.

The invention relates to the technical field of hot rolled steel coils, and particularly discloses a high-strength corrosion-resistant cold-resistant hot rolled steel coil as well as a production method and application thereof. The high-strength corrosion-resistant cold-resistant hot rolled steel coil comprises the following components in percentage by weight: 0.15% to 0.20% of C, less than or equal to 0.1% of Si, 0.025% to 0.055% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.02% to 0.06% of ALs, 0.025% to 0.050% of Ti, 0.10% to 0.20% of Cu, 0.30% to 0.60% of Cr, 0.01% to 0.03% of V and the balance of iron and inevitable impurities. According to the high-strength corrosion-resistant cold-resistant hot rolled steel coil as well as the production method and application thereof, titanium, copper, vanadium, chromium, manganese and other elements are added into steel, so that the hot rolled steel coil has excellent deformation performance and also has high-strength, corrosion-resistant and cold-resistant effects.

A polycarbonate resin composition which has excellent low-temperature impact resistance and flowability high enough to enable thin molding and provides a coated molded article having a good appearance and high impact resistance. The resin composition comprises 100 parts by weight of a resin component including a polycarbonate resin (component A) and a polycarbonate-polydiorganosiloxane copolymer resin (component B) and 0.5 to 2.5 parts by weight of a polyolefin resin (component C).

The invention discloses a treatment method of 630 steel, which comprises the following steps: carrying out hot rolling, and forging to form a 630 steel bar; carrying out solution treatment on the 630 steel bar at 1000-1100 DEG C, and cooling the bar to room temperature in air; carrying out overaging treatment on the 630 steel bar at 680-740 DEG C, wherein the number of minutes for treatment is determined according to the number of millimeters of the bar diameter; cooling the bar to room temperature in air; carrying out thermal-insulation heating treatment on the 630 steel bar at 1000-1080 DEG C, and cooling the bar to room temperature in air; and carrying out aging treatment on the 630 steel bar at 580-640 DEG C, and cooling the bar to room temperature in air. When the method is used for treating the 630 steel, the ballistic work of the 630 steel at -40 DEG C can be greater than or equal to 45J, thereby enhancing the low-temperature impact resistance of the 630 steel.

The invention discloses a high-temperature steaming and boiling casting polypropylene film, the high-temperature steaming and boiling casting polypropylene film is characterized in that the film is ofa three-layer structure, the three-layer structure sequentially comprises a corona layer (1), a middle layer (2) and a heat sealing layer (3) from top to bottom, wherein the corona layer (1) comprises 85-98% of block copolymerization polypropylene and 2-15% of polyolefin elastomer, the middle layer (2) comprises 85-98% of block copolymerization polypropylene and 2-15% of polyolefin elastomer, theheat sealing layer (3) comprises 78-96% of block copolymerization polypropylene, 2-15% of polyolefin elastomer and 2-7% of silicone smooth master batch, and the proportion is mass percent; in addition, the thickness ratio of the corona layer (1) to the middle layer (2) to the heat sealing layer (3) is 1:(2-4):(1-2).

The present invention relates to thermoplastic molding compositions with improved flowability based on thermoplastic polyamides and a copolymer consisting of methacrylic acid of at least one olefin and at least one aliphatic alcohol having 1 to 4 carbon atoms Compositions of esters or acrylates, wherein the MFI of the copolymer is not less than 50 g/10min, and also to a process for the preparation of such molding compositions, and the use of such molding compositions in the production of electrical, electronic, telecommunications, motor vehicle or computer industries Applications for molded parts in sports, medicine, home or entertainment industries.

Provided is a polycarbonate-based resin composition, including a polycarbonate-based resin (A) containing a predetermined polycarbonate-polyorganosiloxane copolymer (A1), and 0.5 part by mass to 40 parts by mass of a white pigment (B) and 0.02 part by mass to 5.0 parts by mass of a hydrolysis resistant agent (C) with respect to 100 parts by mass of the polycarbonate-based resin (A).

The invention discloses a thermoplastic copolyester composite material which comprises the following components in parts by weight: 100 parts of thermoplastic polyether ester; 6-50 parts of a styrene-acrylonitrile-glycidyl methacrylate copolymer; 8-20 parts of an ethylene-glycidyl methacrylate copolymer; the thermoplastic polyether ester is a polycondensate of terephthalic acid/isophthalic acid/1, 4-butanediol/polytetrahydrofuran ether glycol. The thermoplastic copolyester composite material has the advantage of good low-temperature impact resistance.