32results about How to "Reduce molecular gap" patented technology

Disclosed are an epoxy resin-POSS hybrid resin and a preparation method of its composite material. The epoxy resin-POSS hybrid resin is applied in an advanced electronic packaging baseplate material. At present, it is very hard to greatly raise comprehensive properties of resin simply through molecular design of epoxy resin, and some performance is raised at the expense of other performance. Traditional POSS modified epoxy resin is mainly prepared by two modes of physical blending and participation copolymerization. Through grafting modified epoxy resin, unique mono-isocyanate polyhedral oligomeric silsesquioxane is adopted to be dispersed on main chain of resin molecules at the molecular level instead of participating in copolymerization as a crosslinking point, so as to obtain high heat-resistant and low dielectric resin for advanced electronic packaging baseplates. The cured hybrid resin has smaller intermolecular distance and lower segment slip capability, and thermal performance, dielectric properties, moisture absorption resistance and mechanical properties of a resin-based composite material copper-clad plate are raised in different degrees.

The invention discloses a formula of a non-gelatin soft capsule shell. The soft capsule shell is prepared from the following components in percentage by weight: 25-75 percent of modified starch, 10-30 percent of carrageenan, 10-25 percent of a plasticizer, 40-50 percent of water, 2-12 percent of a thickening agent and the balance of pigment which can be added according to the required color of the soft capsule pill. According to the formula, the main component gelatin of a traditional capsule shell material is replaced by modified starch and carrageenan, so that multiple defects of gelatin can be overcome, the modified starch has the characteristics of film performance, air resistance, adhesion and the like, has high safety performance and good elasticity, and has the dissolving speed superior to that of gelatin; the soft capsule prepared from modified starch and carrageenan has stable property, and cannot easily perform a crosslinking phenomenon; and the soft capsule prepared by using gelatin replacing materials does not have the problem of oxidation crosslinking, and an antioxidant does not need to be added.

The invention discloses a soft capsule wall material formula including 20-40% by weight of polyvinyl alcohol (PVA), 10-40% by weight of a plasticizer, 40-50% by weight of water and 5-15% by weight of a thickening agent, a pigment is added according to color needed by a soft capsule glue ball. By replacement of main component gelatin of the traditional capsule wall material by the polymer polyvinyl alcohol (PVA), many shortcomings of the gelatin are overcome, safety is high, performance is relatively stable, and the crosslinking phenomenon is not easy to occur. No oxidation crosslinking problem occurs, the soft capsule wall material formula is in no need to add antioxidants; the soft capsule wall material formula is added with sorbitol which has excellent moisturizing effect and can effectively prevent drying and aging of soft capsules, when glycerol and sorbitol as a plasticizer are mixed for use, oxygen reaction and matter transport can be prevented, and by addition of thickener sodium alginate, hydroxypropyl methyl cellulose and poly ethylene oxide to improve the glue liquor viscosity, the prepared soft capsule can be sealed without heating.

The invention discloses a 3D (Three-dimensional) high-density product printing mode. A high pressure pump and a high pressure chamber are adopted for applying uninterrupted high pressure to a printed product, and the molecule gaps of a material are reduced, so that products made of different materials can be achieved in a high pressure environment.

The invention discloses an organosilicon quaternary ammonium salt finishing method for the antibacterial treatment of a cotton yarn, and belongs to the technical field of textile chemistry. The methodstrengthens the adhesion density of the organosilicon quaternary ammonium salt on a fiber of the cotton yarn and the antibacterial property of the cotton yarn is improved after finishing. The cottonyarn is sequentially leached in a neutral glutamic acid solution, a compound organosilicon quaternary ammonium salt, and a weak acid rinsing solution, and is finally baked to finish finishing, the neutral glutamic acid with the concentration of 5% is used to pretreat to charge the fiber with the negative charge, the electric adhesion of the organosilicon quaternary ammonium salt with the positivecharge is improved, the compound quaternary ammonium salt with the concentration of 2% is used in finishing to achieve dense adhesion, then the weak acid rinsing solution is used to rinse to remove the glutamic acid, and the negative charge is removed by baking and coking the adhered glutamic acid. The adhesion speed, the adhesion density and the adhesion efficiency of the fiber of the cotton yarnon the organosilicon antibacterial quaternary ammonium salt are improved after finishing, the antibacterial property of the finished cotton yarn fabric is strengthened, and meanwhile, the appearanceperformances like softness and moisture retention of the finished cotton yarn fabric are improved. The process is simple, the operation is convenient, the consumption is low, the efficiency is high, and the method has an application value in the aspect of filtering and blocking bacteria and killing bacteria and viruses.

The invention discloses a high-toughness abrasion-resistant damping cable used for ships. The high-toughness wear-resistant damping cable comprises a conductor, an insulating layer, a filling layer, a shielding layer, an armored layer and an external sheath. The raw material of the external sheath includes the following parts by weight: 50-60 parts of polybutadiene rubber, 20-25 parts of EPDM rubber, 15-18 parts of chlorinated polyethylene 140B, 8-12 parts of high-toughness high-heat-insulation performance gel, 1-1.5 parts of sulfur powder, 1.4-1.7 parts of promoter DM, 2.1-2.4 parts of promoter TMTM, 5-7 parts of trioctyl trimellitate, 2-3.5 parts of tributyl citrate, 25-28 parts of barite powder, 17-20 parts of high-abrasion-resistant carbon black, 12-15 parts of nano calcium carbonate, 7-10 parts of ultrafine talcum powder, 6-9 parts of hard pottery clay, 5-8 parts of kaolin, 2-4 parts of red phosphorus, 0.3-0.6 part of NOBS, 0.5-1 part of antioxidant RD and 2.5-4 parts of antioxidant RD.

The invention discloses an aging-resistance rubber material for boats. The material comprises the following components in parts by weight: 55-70 parts of chlorinated polyethylene 130B, 22-30 parts of chlorosulfonated polyethylene, 1-3 parts of a metallic oxide vulcanization system, 1.5-3 parts of trimethylolpropane trimethacrylate, 0.5-1.2 parts of an organosilicon compound, 2-5 parts of magnesium oxide, 1-2 parts of lead stearate, 2-4 parts of chlorinated paraffin, 1-2.5 parts of EPO, 20-25 parts of white carbon black, 6-13 parts of magnesium carbonate, 18-24 parts of superfine talc powder, 35-40 parts of calcined clay, 1.8-2.5 parts of dioctyl sebacate, 1-3 parts of dioctyl phthalate, 0.8-1 part of an antiager RD, 1-1.5 parts of an antiager MB, 0.5-0.85 part of an antiager HS-911, 1-1.3 parts of tetramethyl thiuram disulfide and 1.5-2 parts of N-cyclohexyl-2-benzothiazole sulfenamide.

The invention discloses a preparation method of a charger plug connecting wire sheath. The preparation method comprises the following steps: uniformly mixing polyurethane rubber, isoprene rubber, C9 petroleum resin and coumarone resin to obtain preformed material; adding stearic acid, a silane coupling agent, vermiculite powder, attapulgite, coal gangue, ground calcium carbonate and zeolite powderinto the preformed material; heating and stirring; heating, and performing vacuum stirring to obtain a rubber compound; adding tert-butyl hydroperoxide, magnesium oxide, an anti-aging agent DFC-34 and an antioxidant TPP into the rubber compound; vulcanizing and moulding to obtain the charger plug connecting wire sheath. According to the preparation method disclosed by the invention, the obtainedsheath has the advantages of remarkably high tensile strength and elongation at break, strong resistance to aging and tearing and high toughness, and avoids the phenomenon of electric leakage on a low-voltage side caused by a high-voltage side, thus the safety of a charger is enhanced, and a user feels safer to use the charger.

The invention discloses a corrosion and aging resistant rubber material for ships. Raw materials for preparing the corrosion and aging resistant rubber material comprise, by weight, 50-70 parts of chlorinated polyethylene 140B, 25-30 pars of natural rubber, 20-30 parts of chlorosulfonated polyethylene, 1.5-2 parts of a metal oxide vulcanization system, 0.5-1.5 parts of sulfur, 2-5 parts of magnesium oxide, 20-30 parts of high abrasion furnace black, 15-20 parts of nanometer calcium carbonate, 15-20 parts of superfine talcum powder, 30-40 parts of calcined potter's clay, 1.5-2 parts of trimellitate, 1-2 parts of dicapryl phthalate, 1-1.5 parts of an antioxidant 1010, 1-1.5 parts of an antioxidant MB, 0.5-1 part of an antioxidant RD, 1-1.5 parts of 1,2-ethylene thiourea, and 0.8-1.3 parts of NOBS. The corrosion and aging resistant rubber material has good mechanical properties, and excellent aging resistance, wear resistance, high temperature resistance, oil resistance and corrosion resistance, and can be used in the complex environment of ships.

The invention discloses a pipe for discharging sewage. The pipe is prepared from the following raw materials in parts by weight: 60-90 parts of unsaturated polyester resin, 13-19 parts of polyphenylene sulfide, 6-14 parts of liquid polyisoprene rubber, 3-9 parts of calcium carbonate, 2-6 parts of asbestos powder, 4-9 parts of sodium selenite, 2-6 parts of polychlorotrifluoroethylene, 3-6 parts of basalt fibers, 2-9 parts of polyvinyl acetate, 2-5 parts of epoxidized linseed oil, 1.5-7 parts of a POE (polyolefin elastomer), 1-4 parts of an anticorrosive agent and 1-3 parts of a dispersant. The pipe has the advantages that a preparation method is simple and easy to implement, the cost is lower, and raw materials are available; the unsaturated polyester resin, polyphenylene sulfide, the liquid polyisoprene rubber, calcium carbonate and the like are mixed to be used as materials of the pipe; the unsaturated polyester resin has excellent chemical stability, heat and cold resistance, weather resistance, hydrophobicity and low surface tension and does not produce substances polluting the environment, and the anticorrosive agent is added, so that corrosion resistance of the inner surface of the pipe can be significantly improved.

The invention discloses an anti-vulcanization LED lamp bead, which comprises a bracket, an LED accommodating cavity with an open top, and an LED chip, wherein the LED accommodating cavity is formed byenclosing an insulating material positioned at the top of the bracket and the top of the bracket together, the LED chip is positioned in the LED accommodating cavity, the top of the bracket is covered with a gold plating layer, the bottom of the LED accommodating cavity is divided into a fixed area and a light reflecting area, the bottom of the LED chip is fixed to the fixed area, and the light reflecting area is provided with a light reflecting layer. According to the invention, the vulcanization resistance of a product can be greatly improved, the reliability is high, and the service life of the product can be greatly prolonged; pits are respectively formed in the top and the bottom of the bracket, and even the side surface of the isolation gap can be an uneven curved surface, so that harmful gas and water vapor are more difficult to enter the chip from the contact surface of the bracket and the thermosetting plastic; and the LED accommodating cavity is filled with the modified silica gel, so that the molecular gap is small, the air tightness is good, and the vulcanization resistance is high.

The invention discloses iron-based magnetic powder with double coating layers as well as a preparation method and application of the iron-based magnetic powder. The iron-based magnetic powder with the double coating layers comprises an iron-based magnetic powder inner core, a phosphate coating layer and a bismaleimide resin coating layer from inside to outside. The preparation method of the iron-based magnetic powder with the double coating layers comprises the following steps: 1) dispersing the iron-based magnetic powder into a phosphoric acid solution, and carrying out surface modification to obtain the iron-based magnetic powder with a phosphate coating layer; and 2) dispersing the iron-based magnetic powder with the phosphate coating layer into a bismaleimide resin solution, and carrying out surface coating to obtain the iron-based magnetic powder with double coating layers. A magnetic powder core prepared from the iron-based magnetic powder with the double coating layers has the advantages of being good in heat resistance, low in loss and low in preparation cost.