35results about How to "Improve vulcanization speed" patented technology

The invention discloses a heat-resistant corrosion-resistant rubber tube, and relates to the technical field of manufacturing of the rubber tube. The heat-resistant corrosion-resistant rubber tube comprises a rubber tube body, wherein the rubber tub body comprises an inner rubber layer, a cord fabric layer, a middle rubber layer, a coppered steel wire woven layer and an outer rubber layer which are arranged from inside to outside in sequence; the inner rubber layer is a fluorine rubber layer; the middle rubber layer and the outer rubber layer are both butadiene styrene rubber layers; the inner rubber layer, the cord fabric layer, the middle rubber layer and the coppered steel wire woven layer and the outer rubber layer are connected in a vulcanized manner. Compared with the prior art, the heat-resistant corrosion-resistant rubber tube has the advantages that the heat resistance and the corrosion resistance are greatly improved and the requirement on delivery of high-temperature gas or liquid with certain corrosiveness is met.

The invention discloses a rubber tire tread and a milling process thereof. The rubber tire tread comprises the following components in parts by weight: 70-110 parts of natural rubber, 0-15 parts of styrene-butadiene rubber, 5-20 parts of tread rubber powder, 1.5-2.5 parts of stearic acid, 1-2 parts of sulfur powder, 2-18 parts of white carbon black, 12-15 parts of carbon block, 2-30 parts of aromatic oil, 1-8 parts of zinc oxide, 4-7 parts of an anti-aging agent, 1-4 parts of pine tar, 1-4 parts of an accelerating agent, 0.2-1 part of an anti-reversion agent and 2-5 parts of a binding agent. A three-section milling process is adopted, and the milling process can improve the abrasive resistance, tear resistance and chunking and chipping resistance of the tire tread.

The invention discloses a rare-earth butadiene rubber composite cable sheath material, comprising the following raw materials in parts by weight: 80-100 parts of rare-earth butadiene rubber, 40-50 parts of butadiene styrene rubber, 1.8-2.3 parts of vulcanization system, 5-10 parts of organic montmorillonite, 20-30 parts of a lignin reinforcing agent, 30-40 parts of white carbon black, 20-30 parts of silane modified sepiolite, 2-3 parts of nano-zinc oxide, 1.5-1.8 parts of stearic acid, 1-2 parts of naphthenic oil, 40-50 parts of carbon black N330 and 5-6 parts of N-methylene carboxylic-2-benzothiazole sulfonamide. The rare-earth butadiene rubber composite cable sheath material has the advantages of low cost, good ageing resistance, excellent tensile strength and deflection resistance, good tear resistance, simple preparation process and convenience in practical operation.

The invention discloses a special cable material for a styrene-butadiene rubber sleeved field detection cable and a preparation method of the special cable material. The special cable material is characterized by comprising the following cable materials in parts by weight: 60-80 parts of natural rubber, 20-30 parts of styrene-butadiene rubber, 5-10 parts of zinc white, 1-2 parts of stearic acid, 1-2 parts of a promoter ZDC, 1-2 parts of a promoter M, 2-3 parts of an antiager MB, 3-4 parts of an antiager D, 2-5 parts of paraffin, 20-30 parts of calcium carbonate, 25-35 parts of pottery clay, and 15-25 parts of high abrasion resistant carbon black. The preparation method provided by the invention is simple; the special cable material is greatly improved in properties, has excellent properties in tensile strength and elongation at break, as well as tensile strength retention rate, breaking extending retention rate, temperature brittleness after ageing, and has more excellent wear resistance, heat resistance, ageing resistance and vulcanization speed compared with a conventional cable material.

A rubber composition for a tread optimizing a vulcanization speed in a vulcanization step and, further, improving heat aging resistance is provided.

A rubber composition for a tread comprising 20 to 90 parts by weight of silica, 0.5 to 2 parts by weight of (A) a guanidine vulcanization accelerator, 0.1 to 0.5 part by weight of (B) a thiuram vulcanization accelerator, and 0.5 to 2 parts by weight of (C) a sulfenamide vulcanization accelerator represented by the general formula (1):

(wherein R is a linear alkyl group or a branched alkyl group having 1 to 18 carbons), based on 100 parts by weight of a rubber component.

The invention discloses an insulating layer material for a high-voltage electrical cabinet. The material is prepared from the following raw materials in parts by weight: 8-24 parts of vinyl silicone rubber, 3-12 parts of chlorinated polyethylene rubber, 4-6 parts of ABS resin, 2-14 parts of decabromodiphenyl ethane, 5-15 parts of epoxy resin, 5-13 parts of stearic acid, 3-5 parts of cyanoacrylate, 2-4 parts of polyacrylate glue powder, 5-20 parts of a filler, 2-5 parts of a plasticizer, 1-6 parts of flame retardants and 0.5-1.5 parts of a stabilizer. A preparation method disclosed by the invention is simple and feasible, and the prepared insulating layer material can prevent the potential safety hazard that the insulating layer materials such as cables and electric wires are flammable in a high voltage environment. As flame retardants such as magnesium oxide, aluminum oxide and antimonous oxide are added into the raw materials, the insulating layer material has relatively high flame retardance and has the advantages of no toxicity, low smoke and the like.

The invention discloses a heat-resistant and aging-resistant chloroprene rubber tube. The chloroprene rubber tube comprises chloroprene rubber, chlorinated butyl rubber, poly-octene rubber, polyisoprene rubber, polyether urethane, zinc oxide, bis(2,4-dichlorobenzoyl) peroxide, 2,5-dimethyl-2,5-di(tert-butylperoxy) hexane, stearic acid, nano calcium carbonate, hollow glass microspheres, nano montmorillonite, basic sodium and aluminum carbonate, a silane coupling agent, an anti-aging agent DFC-34, an anti-aging agent A, dipentaerythritol diphosphite, hexaphenoxy cyclotriphosphazene, vinyl silicone oil, an accelerant, zinc diricinoleate, aluminum dihydrogen phosphate and 1,3-bis(citraconimidomethyl)benzene. The heat-resistant and aging-resistant chloroprene rubber tube has high strength, good heat resistance and aging resistance and excellent storage stability, and products of the chloroprene rubber tube can meet use requirements in various fields and have long service life.

The invention relates to a rubber sole and provides a slippery resistant safe shoe rubber sole and a preparation method thereof. The provided rubber sole has a strong performance on resisting slipping. The friction coefficient is not less than 0.45 and is obvious higher than the slippery resistant requirements (heelpiece 0.13, smoothness 0.18) of international standard BS EN ISO 20345:2011 personal protective equipment safe shoes. The rubber sole is composed of the following raw materials: high vinyl solution polymerized styrene-butadiene rubber, high acrylonitrile nitrile rubber, NBR/PVC emulsion co-precipitated alloy, white carbon black, an anti-aging agent, polyethylene glycol, a silane coupling agent, polyethylene wax, yellow resin, diglycol, zinc oxide, insoluble sulfur, and a vulcanization promoter.

The invention provides a sealing strip butt-joint thin slice rubber material and a preparation method thereof, and a sealing strip butt-joint thin slice rubber sheet processing method and processing device. According to the sealing strip butt-joint thin slice rubber material and the preparation method thereof, various raw material components are screened and compounded, a rubber one-section mixing process is adopted, and the sealing strip butt-joint thin slice rubber material for preparing a sealing strip butt-joint thin slice rubber sheet having excellent properties by an extruding process can be obtained. Compared with a conventional sealing strip butt-joint thin slice rubber sheet processing method, the sealing strip butt-joint thin slice rubber sheet processing method can significantly improve the processing efficiency and the product quality, solves the storage problems of a product in a conventional process, and is beneficial to wide application.

The invention relates to an all-steel tread formula with high wear resistance and long mileage and a preparation process of the all-steel tread formula. The all-steel tread formula comprises the following components: 100 parts of base rubber; 45 to 60 parts of super wear-resistant carbon black; 0.5-5 parts of a carbon black dispersant; 1-3 parts of stearic acid; 2.5 to 3.5 parts of zinc oxide; 1-3parts of a homogenizing agent; 1-3 parts of an anti-aging agent; 0-2 parts of tackifying resin; 0.5 to 2.0 parts of protective wax; 1.0 to 1.6 parts of sulfur; 0.6 to 1.5 parts of a sulfenamide accelerator. According to the invention, the carbon black with low heat generation and high wear resistance is adopted; meanwhile, an NR/BR/SBR (natural rubber/polyisoprene rubber/styrene butadiene rubber)three-gel combined system is adopted; the carbon black dispersant capable of participating in the reaction of rubber and carbon black is used, the interaction between rubber and carbon black is enhanced, the aggregation of the filler and the heat generation of the rubber material are reduced, the adverse effect of hysteresis on aging is reduced, and the friction coefficient of the rubber materialis reduced, so that the wear resistance and durability of a tread can be effectively improved.

The invention discloses a low-temperature-resistant protective sleeve for underground cables, and belongs to the technical field of cable protection. The protective sleeve is prepared from the following raw materials by weight: 20-30 parts of silicone rubber, 35-45 parts of ethylene propylene diene monomer, 2.5-3.5 parts of white carbon black, 5-8 parts of a vulcanizing agent, 2-5 parts of an accelerator, 3-8 parts of a plasticizer, and 2-4.5 parts of a flame retardant. Compared with a traditional cable protective sleeve and a preparation process thereof, the elongation at break of the protective sleeve at normal temperature reaches 678% or above, the tensile strength reaches 28.6 Mpa or above, and the mechanical performance is excellent; the low-temperature retraction temperature TR10 is -24.5 DEG C or below, and the low-temperature-resistant protective sleeve can keep good elasticity under the low-temperature condition and is suitable for being used in the low-temperature environment; and the oxygen index reaches 48 or above, the flame retardant property is good, the use requirement of the underground cable can be met, the cable can be used in a low-temperature environment, and the service life of the underground cable is prolonged.

The invention discloses a preparation method of an anti-corrosion combustion-supporting wire or cable. Firstly, a plurality of wires are intertwisted into a bundle and are sequentially wrapped with aninsulating layer and a shielding layer to obtain wire cores, groups of wire cores are arranged in bundles to form a cable core; a sheath layer wraps the outer side of the cable core; finally, a protective sleeve is coated with a microcapsule particle coating layer to obtain the cable, the sheath layer uses polyvinyl chloride, a stabilizing agent and a plasticizer as main raw materials. Polyvinylchloride has high high-temperature resistance, low-temperature resistance and corrosion resistance; a stabilizer has high heat resistance and weather resistance, the plasticizer has excellent elasticity, weather resistance and mechanical properties, the three components are blended and vulcanized, respective advantages are reserved, in addition, capsaicin released from the microcapsules can repelants and mice without causing other damage, and the microcapsule is environmentally friendly and convenient to use.

Belonging to the field of rubber plastic products, the invention in particular relates to a composite functional reinforcing agent for rubber production and a preparation method thereof. The raw materials include: red mud, a conditioning agent and a dispersing agent. The conditioning agent is stearic acid and gypsum, the dispersing agent is calcium phosphate, and the weight ratio of the red mud, the conditioning agent and the dispersing agent is 8-12:0.8-1.2:0.8-1.2. The composite functional reinforcing agent provided by the invention realizes utilization of waste red mud, has a good reinforcing effect on rubber products, can partially replace carbon black and white carbon black, can completely replace other traditional inorganic filler (like potter's clay, ordinary silicon powder and calcium carbonate, etc) in the rubber formula of rubber products, also can serve as a rubber reinforcing agent and filler. At the same time, the composite functional reinforcing agent also has vulcanization promoting and flame retardant effects, thereby reducing the dosage of carbon black, a vulcanization accelerator, a flame retardant and other expensive raw materials involved in the rubber formula, lowering the production cost of rubber products, and improving the performance of the prepared product.

The invention discloses a rubber plug for a puncture-type infusion connecting member heparin cap and belongs to the technical field of medical instruments. The rubber plug comprises, by weight, 100 parts of isoprene rubber, 3-5 parts of transparent zinc oxide, 1-3 parts of stearic acid, 1-1.3 parts of sulfur, 0.1-0.4 part of promoter TRA, 0.1-0.3 part of promoter TMTM and 5-8 parts of lightweight magnesium carbonate. The rubber plug has the advantages of stable physiochemical and biological performance, excellent compatibility with medicine, resistance to perforation, good closing performance after puncture and capability of meeting clinical using needs.