224results about How to "Improve vulcanization efficiency" patented technology

The invention discloses a vulcanized rubber for shoes capable of realizing high effective and fast vulcanization and a preparation method and a vulcanization process thereof. The vulcanized rubber isprepared from natural rubber, styrene-butadiene rubber, butadiene rubber, accelerator B, accelerator BM, accelerator DS, nanometer zinc oxide, rubber softening oil, sulphur, stearic acid, aging resister CD, carbon black N330, pine tar oil, solid coumarone, reclaimed rubber and pot clay. Compared with the prior art, the vulcanized rubber of the invention has suitable starting time of vulcanization,faster velocity of vulcanization and higher thermal oxidative aging property, the vulcanization efficiency is increased, and the heat-conducting property, processing safety and storage property of the rubber are increased in the vulcanization process; the provided vulcanization process can effectively shorten the vulcanization time, improve the vulcanization quality and increase the vulcanizationefficiency to 2-3 times of the original one.

The invention discloses waster rubber powder composite modified asphalt and a preparation method thereof. The waster rubber powder composite modified asphalt is prepared from, by weight, 18-32% of waste rubber powder, 58-72% of matrix asphalt, 1-3% of carbon nanotubes, 5-10% of white carbon black, 3-7% of high-density polyethylene, 2-4% of sulfur, 2-7% of stearic acid and 5-8% of zinc oxide. The preparation method includes: mixing waste rubber powder with matrix asphalt to obtain waster rubber powder mixed matrix asphalt through treatment; subjecting carbon nanotubes and white carbon black to reaction to obtain modified white carbon black; subjecting an obtained product to treatment along with high-density polyethylene, delivering to a reactor, adding sulfur, zinc oxide and stearic acid, well mixing, and stably developing and treating for a period of time at a certain temperature to obtain the waster rubber powder composite modified asphalt. The waster rubber powder composite modified asphalt prepared according to the method is excellent in comprehensive performance and applicable to fields of waterproof coils, road asphalt, special rubber products and the like.

The invention relates to a preparation method of a vulcanizing activator taking a metal organic framework material as a carrier. The preparation method comprises the following steps: S1, enabling an alkaline solution to react with an organic carboxylate ligand to prepare a metal organic framework material precursor solution; S2, enabling a zinc salt solution to react with a metal organic frameworkmaterial precursor to generate a zinc metal organic framework compound; S3, washing and filtering the zinc metal organic framework material; S4, introducing a carrier: preparing a zinc metal organicframework compound filter cake into suspension, adding a calcium hydroxide solution, stirring the solution for certain time till calcium hydroxide and the zinc metal organic framework compound react with each other completely, generating a calcium-based organic framework compound and zinc hydroxide, and adsorbing the generated zinc hydroxide by the calcium-based organic framework compound, so as to form a supported zinc hydroxide@ calcium metal organic framework material; S5, filtering and drying a finished product, so as to prepare a micro-nano low-zinc vulcanizing activator. The preparationmethod has the advantages of being simple, convenient, low in energy consumption, easy to control, and suitable for large-scale production.

The invention relates to a sizing material of a high hardness rubber seal. The sizing material comprises the raw material components in parts by weight as follows: 120-150 parts of 1# natural rubber, 2-3 parts of sulphur, 4-6 parts of zinc oxide, 2-4 parts of stearic acid, 1-1.2 parts of paraffin, 10-12 parts of pine tar, 80-100 parts of spraying carbon black, 1-1.2 parts of an accelerant DM (Chinese name: 2,2'-dithio di-benthothiazole, molecular formula: C14H8N2S4), and 1-1.2 parts of an antiager D (Chinese name: N-phenyl-2-naphthylamine, molecular formula: C16H13N). According to the invention, high hardness components are added in the rubber formula, and meanwhile the vulcanizing efficiency is enhanced, and the integral hardness of rubber is improved.

The invention provides a nano silicon dioxide-doped nanocellulose material as well as a preparation method and the application thereof. Nano silicon dioxide and a nanocellulose material are at least bonded by part of hydrogen bonds; based on 100% of the total mass of the nano silicon dioxide-doped nanocellulose material, the content of the nano silicon dioxide is 70-90% by mass. The nano silicon dioxide has relatively good dispersibility in rubber, so that the nanocellulose material connected with the nano silicon dioxide by part of hydrogen bonds is dispersed uniformly in the rubber, the useof a silane coupling agent and other surfactants can be reduced, and a specific gravity of the product is reduced while indirectly reducing costs of the product; moreover, the nanocellulose material is a green and environment-friendly material, so that the pressure on environments caused by traditional modified materials can be relieved.

The invention relates to a pore-free tyre segmental mold with a dual damascene composite structure, a pore-free tyre segmental mold pattern block with a dual damascene composite structure and a method. The pattern block comprises a pattern block body made of a first metal material and mosaic structures made of a second metal material, wherein the mosaic structures are inlaid in positions close to the inner peripheral surface of the pattern block body, which is used for forming a pattern surface; the pattern block is provided with an exhaust passage communicated with the inner peripheral surface and the exterior of a segmental mold cavity; the pattern block body and the mosaic structures are assembled to form the pattern block; the first metal material and the second metal material are both suitable for tyre vulcanization, and the intensity of the first metal material is higher than that of the second metal material; the exhaust passage comprises exhaust gaps formed between the mosaic structures and the adjacent pattern block body. The pattern block provided by the invention is formed by compositing the two materials; the intensity of the metal material of the pattern block body is higher than that of the metal material of the mosaic structures corresponding to ring-like pattern forming parts, all parts receiving extrusion force, friction force and the like during use are all made of the first metal material, all the pattern forming parts are made of the second metal material, the vulcanization efficiency is high and the tyre surface quality is guaranteed.

The invention belongs to the field of chemical synthesis and discloses a synthesis method for 4-S-5-Br-2',3',5'-O-triacetyluridine. The synthesis method comprises the steps that a compound 5-Br-2',3',5'-O-triacetyluridine serves as a raw material, phosphorus pentasulfide and a Lawesson reagent are combined to serve as a vulcanization reagent, 1,4-dioxane serves as a solvent, and a chemical reaction is carried out to finally prepare the 4-S-5-Br-2',3',5'-O-triacetyluridine. The synthesis method for the 4-S-5-Br-2',3',5'-O-triacetyluridine has the advantages that the reaction time is shortened,and the vulcanization efficiency is greatly improved. The synthesis method reduces the cost, the treatment after the reaction is simple and convenient, and meanwhile the yield of the thionucleoside compound after the reaction is increased.