11 results about "Ethylene propylene copolymer" patented technology

A carbon fiber particle and a manufacturing method thereof are disclosed. The carbon fiber particle includes a plurality of reinforcing fibers and a resin material. The reinforcing fibers include a plurality of carbon fibers and a sizing agent composition. The sizing agent composition includes a sizing agent of an acrylate graft-modified polyurethane resin. The acrylate graft-modified polyurethane resin is graft-modified with a plurality of modifying monomers, and the modifying monomers are at least one selected from the group consisting of an alkyl-containing (meth)acrylate, a hydroxyl-containing (meth)acrylate, and a carboxyl-containing vinyl monomer. The resin material includes a polypropylene resin and a modified ethylene propylene copolymer. The modified ethylene propylene copolymer is a maleic anhydride-modified ethylene propylene copolymer. The weight ratio between the plurality of reinforcing fibers and the resin material is between 1:9 and 11:9. Thus, the adhesion between the plurality of reinforcing fibers and the resin material can be improved, so that the carbon fiber particle can have better mechanical properties.

This invention provides carbon fiber particles and a method for producing the same. [Solution] The carbon fiber particles comprise multiple reinforcing fibers and a resin material. The reinforcing fibers comprise multiple carbon fibers and a sizing agent composition. The sizing agent composition is a polyurethane resin modified with acrylate grafts. The polyurethane resin modified with acrylate grafts is graft-modified using multiple modified monomers, and the modified monomers are selected from at least one of alkyl group-containing (meth)acrylate, hydroxyl group-containing (meth)acrylate, and carboxyl group-containing vinyl monomer. The resin material comprises polypropylene resin and a modified ethylene propylene copolymer. The modified ethylene propylene copolymer is an ethylene propylene copolymer modified with maleic anhydride. The weight ratio of the multiple reinforcing fibers to the resin material (total weight of reinforcing fibers: resin material) is 1:9 to 11:9.

This invention provides a method for preparing military-grade transparent glass membrane materials, belonging to the field of high-performance composite membrane technology. The invention includes the following steps: S1 heat treatment of the base fabric, S2 coating preparation, and S3 post-treatment. In the coating preparation process, the raw materials used include PTFE emulsion, fluorinated ethylene propylene copolymer, silane coupling agent, glass microspheres, and nonionic fluorinated surfactants. The PTFE coating is prepared through impregnation, drying, baking, sintering, and cooling processes. This invention overcomes the limitation of existing PTFE membrane strength enhancement relying on the addition of a single component through synergistic innovation in formulation and process. By precisely proportioning PTFE emulsion, glass microspheres, and additives, and synergistically optimizing process parameters, a balance of multiple properties—mechanical strength, flame retardancy, flexibility, and environmental adaptability—is achieved, solving the technical pain points in existing technologies such as the incompatibility between high strength and high peelability, and the contradiction between flame retardancy and processability.

The present application relates to the technical field of textile fibers, in particular to an antibacterial polyolefin elastomer fiber and a preparation method thereof, the preparation method being: mixing and granulating antibacterial polyolefin elastomer materials to obtain spinning granules; the antibacterial polyolefin elastomer materials comprising ethylene-propylene copolymer A, maleic anhydride grafted ethylene-octene copolymer B and antibacterial agent C; the antibacterial agent C comprising hydroxyl modified nano-silver, polyhexamethylene guanidine hydrochloride and silane coupling agent; and the spinning granules being subjected to melt spinning to obtain the antibacterial polyolefin elastomer fiber. The antibacterial polyolefin elastomer fiber has broad-spectrum antibacterial property, and the fiber has good mechanical properties and elasticity, and the spinning process is smooth, being suitable for industrial application. The present application has simple process, low cost and green environmental protection, and the prepared antibacterial polyolefin elastomer fiber can be applied to various scenes such as antibacterial close-to-body textiles, medical protection, baby products and the like.

Provided is syndiotactic polypropylene-based ethylene-propylene copolymers comprising a) 5 to 15% by weight of ethylene and 85 to 95% by weight of propylene; b) 60 to 90% rr triads; c) Mw (LS) of 10 to 250 kg / mol; and d) no substantial melting peak, wherein the heat of fusion of the peak is 5 J / g or less as determined by differential scanning calorimetry at a scan rate of 10° C. / min (ASTM D3418-03).

This invention relates to the technical field of polyolefin insulation materials for wires and cables, specifically to a flame-retardant and anti-aging ethylene-propylene copolymer composition and its preparation method. The composition uses ethylene-propylene copolymer as a matrix, introduces an organophosphorus flame retardant composed of aluminum phosphinate and melamine polyphosphate, which synergistically retards the flame with a magnesium-aluminum layered double hydroxide treated with organosilane / fatty acid salts. A multi-component anti-aging system containing hindered phenols and phosphites is employed, with some anti-aging components pre-adsorbed onto the surface of fumed silica nanofillers. Simultaneously, an ethylene-propylene graft compatibilizer containing maleic anhydride groups is added. The composition is formed through a two-step melt blending and granulation process using a flame-retardant masterbatch. This material meets flame-retardant requirements while exhibiting a high oxygen index and good drip suppression effect. It also demonstrates excellent retention of mechanical and electrical properties after thermal aging, making it suitable for cable sheaths and insulation layers in long-term service.

The present invention provides a polypropylene resin composition that offers excellent fluidity and moldability, as well as the ability to mold products with superior impact resistance. [Solution] The polypropylene resin (A) contains a continuous phase made of a propylene polymer (a1) and a rubber phase made of an ethylene-propylene copolymer (a2), and the polypropylene resin (B) contains a continuous phase made of a propylene polymer (b1) and a rubber phase made of an ethylene-propylene copolymer (b2), wherein the mass ratio (A):(B) of the polypropylene resin (A) to the polypropylene resin (B) is 90:10 to 10:90, the total content of copolymer (a2) and copolymer (b2) is 23% by mass or more of the total mass of the polypropylene resin (A) and the polypropylene resin (B), and the MFR of the polypropylene resin composition at a temperature of 230°C and a load of 2.16 kg is 70 g / 10 min or more.

This invention relates to the field of crane technology, and discloses a superhydrophobic anti-corrosion coating and lifting equipment. The superhydrophobic anti-corrosion coating contains a fluorinated multi-component copolymer and fluorinated polymer particles; the weight ratio of the fluorinated multi-component copolymer to the fluorinated polymer particles is 1:0.5-4; the fluorinated multi-component copolymer is a binary copolymer and / or a ternary copolymer, wherein the binary copolymer is a copolymer of vinylidene fluoride and hexafluoropropylene, and the ternary copolymer is a copolymer of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene; the fluorinated polymer particles are selected from fusible polytetrafluoroethylene, fluorinated ethylene propylene copolymer, polytetrafluoroethylene, polyvinylidene fluoride, polychlorotrifluoroethylene, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, and ethylene-chlorotrifluoroethylene copolymer. This superhydrophobic anti-corrosion coating, using a blend of fluorinated multi-component copolymer and fluorinated polymer particles, improves the superhydrophobic and anti-corrosion properties of the coating.

The present invention relates to a battery packaging material. The object is to provide a battery packaging material which is sealed at a temperature at which flammable gas is generated due to an electrolyte, and the seal strength is reduced and the case is opened. The battery packaging material (1) comprises a base material layer (13) as an outer layer, a sealing layer (20) as an inner layer, and a barrier layer (11) disposed between the two layers, the sealing layer (20) is formed by a single layer or multiple layers, the first sealing layer (21) as the innermost layer is composed of a propylene resin comprising an ethylene-propylene copolymer, for the ethylene-propylene copolymer, the ratio Mw / Mn of the weight average molecular weight Mw to the number average molecular weight Mn measured by gel permeation chromatography (GPC) is 1 to 7, the melt flow rate measured based on JIS K7210 at 230°C under a load of 2.16 kg is 5 g / 10 minutes to 30 g / 10 minutes, and the melting point calculated from differential scanning calorimetry is 120°C to 135°C.

The invention relates to a polypropylene composition comprising a heterophasic propylene copolymer wherein the heterophasic propylene copolymer consists of: a propylene homopolymer matrix in an amount from 71 to 92 wt %, preferably from 78 to 89 wt %, more preferably from 84 to 89 wt % based on the heterophasic propylene copolymer, an ethylene-propylene copolymer in an amount from 8 to 29 wt %, preferably from 10 to 29, more preferably 11 to 29 wt %, even more preferably from 11 to 22 wt %, even more preferably from 11 to 16 wt % based on the heterophasic propylene copolymer and wherein t the amount of units derived from ethylene based on the ethylene-propylene copolymer is between 42 and 60 wt %, more preferably 42 and 55 wt %, more preferably 45 and 51 wt % and wherein the polypropylene composition has •a melt flow rate (MFR) in the range from 0.50 to 120 dg / min, wherein the melt flow rate is determined using ISO1133-1:2011 using 2.16 kg at 230° C. and •a ratio of methylene sequence n>5 over the amount of units derived from ethylene based on the ethylene-propylene copolymer of less than 0.30.

In the present disclosure, there are provided a polypropylene resin composition including an ethylene propylene copolymer, and a nonwoven fabric produced therefrom. In particular, the polypropylene resin composition of the present disclosure may be prepared by using a continuous reactor in the presence of a metallocene compound having a specific structure. The polypropylene resin composition of the present disclosure can maintain high strength together with excellent processability. Thus, the polypropylene resin composition of the present disclosure can produce a soft nonwoven fabric, as compared to the existing products, by optimizing xylene soluble, the content of ethylene, a melt index, a crystallization temperature, a tensile strength and a flexural modulus, together with the narrow molecular weight distribution.