11results about How to "Tight molecular structure" patented technology

The invention discloses a low-gram-weight anti-leakage PE (polyethylene) film. The gram weight of the PE film is 26-28g / m < 2 >; the PE film comprises an upper film layer, a middle film layer and a lower film layer which are sequentially distributed from top to bottom, and the upper film layer, the middle film layer and the lower film layer are all obtained by melting, extruding, stretching and curing PE film mixed materials; the PE film mixture is prepared from the following raw materials in percentage by mass: mLLDPE resin, LLDPE resin, LDPE resin and nanoscale calcium carbonate, and the addition amount of the nanoscale calcium carbonate is 45-48%. According to the low-gram-weight anti-leakage PE film, on the premise that low gram weight is ensured, the low-gram-weight anti-leakage PE film has air permeability, anti-leakage performance, appropriate contractibility, high tensile strength and high elongation at break, and the defects in the prior art are overcome.

The present invention relates to the technical field of silsesquioxane preparation, and in particular to a method for preparing a polyhedral oligomeric silsesquioxane containing acryl metallocene. Specifically, trisilanol heptaisobutyl polysilsesquioxane is dissolved in a solvent, (methacryloyloxymethyl) methyldimethoxysilane is added, and the mixture is stirred and reacted in a water bath under an inert atmosphere, and an isopropanol solution of chloroplatinic acid, vinyl ferrocene, and dimethylallyl triammonium lanthanum diphosphate are continuously added, and the mixture is stirred and heated to react, and then the solvent is removed by reduced pressure distillation, and alcohol is added for repeated washing, and the polyhedral oligomeric silsesquioxane containing acryl metallocene is obtained after drying. The polyhedral oligomeric silsesquioxane containing acryl metallocene prepared by the method has excellent thermal stability, chemical corrosion resistance, and mechanical strength.

The invention relates to an automobile film with a repairing functional coating and a manufacturing process thereof in the field of automobile films, the automobile film with the repairing functional coating comprises a polymer PVC (polyvinyl chloride) bottom film layer, an acrylic acid pressure-sensitive adhesive layer and a pigment color layer, the polymer PVC bottom film layer is used as a matrix, the pigment color layer and the acrylic acid pressure-sensitive adhesive layer respectively cover two sides of the polymer PVC bottom film layer, and the pigment color layer and the acrylic acid pressure-sensitive adhesive layer are coated on the two sides of the polymer PVC bottom film layer. The acrylic acid pressure-sensitive adhesive layer is used for adhering the automobile film to an automobile shell, the pigment color layer is used for providing colors and patterns, the transparent polymer PVC film surface layer is arranged on one surface, far away from the polymer PVC bottom film layer, of the pigment color layer, and the transparent polymer PVC film surface layer is used for protecting the pigment color layer. The thermal repair functional coating is arranged on the face, away from the pigment color layer, of the transparent polymer PVC film surface layer, the PET transparent protective film covers the face, away from the transparent polymer PVC film surface layer, of the thermal repair functional coating, the thickness is effectively controlled while the hardness of the thermal repair functional coating is improved, and scratches generated under the same collision condition are smaller.

The application provides an oil tank and a vehicle, and relates to the technical field of automobile accessories. The oil tank comprises a tank body, the tank body comprises a first outer layer and a first inner layer which are arranged in layers, the first outer layer is located on the outer side of the first inner layer, the first inner layer is a first methanol-resistant anticorrosive layer, and the first outer layer is a first light metal layer. The oil tank and the vehicle can prolong the service life of the oil tank.

This utility model provides a manual inflation fixture, belonging to the field of twin-tube shock absorber equipment. The fixture includes a sleeve, which is open at one end. During use, the sleeve end face and the cylinder end face (e.g., the cylinder body end face) are on the same horizontal plane, and the piston rod inside the cylinder (e.g., the shock absorber) is inserted into the sleeve through the sleeve opening. A sealing cavity is formed between the two end faces of the sleeve to prevent gas leakage. An air inlet is provided through the sleeve side wall, with one end connected to the sealing cavity and the other end connected to an external air source. This utility model is suitable for using a simple structure to inject nitrogen into a twin-tube shock absorber to compensate for its performance. At the intersection of the piston rod and cylinder, a component is used to pry open a gap in the oil seal. The sleeve is then fitted onto the intersection of the piston rod and cylinder, forming a sealing cavity between the two end faces. Gas is injected into the sealing cavity, and the gas enters the cylinder (e.g., the shock absorber) through the gap between the oil seals.

The present application relates to the technical field of lubricating grease, and specifically discloses a low-noise lubricating grease with good anti-shear performance and a preparation method thereof. The technical key points are: a low-noise lubricating grease with good anti-shear performance, comprising the following components in parts by weight: 60-80 parts of base oil, 20-35 parts of thickener, 5-10 parts of pentaerythritol tetraisostearate, 0.5-2 parts of antioxidant, 1-3 parts of anti-wear extreme pressure agent, 0.1-0.5 parts of metal passivator, 1-10 parts of viscosity enhancer, and 0.5-1 parts of rust inhibitor; the base oil is polyalphaolefin, and the viscosity at 40°C is 20-200mm 2 / s; the thickener is amino aromatic amine, hydroxy fatty amine and diisocyanate. The grease provided by the present application has excellent shear resistance and low noise performance.

The invention discloses pentaerythritol tetra (6-naphthyl hexanoic acid) ester and a preparation method and application thereof, the preparation method adopts two-step reaction of alkylation and esterification, the first step is that naphthalene and 5-hexenoic acid are subjected to alkylation reaction to generate 6-(1-naphthyl) hexanoic acid; and 2, carrying out a reaction on the 6-(1-naphthyl) hexanoic acid and thionyl chloride, and carrying out an esterification reaction with pentaerythritol to finally obtain the oily pentaerythritol tetra (6-naphthyl hexanoic acid) ester. The prepared pentaerythritol tetra (6-naphthyl hexanoate) ester has a structure with a symmetric four-arm core, a flexible alkyl chain and a rigid naphthalene end group, is shown as a formula (I), is used for lubrication and sealing of various equipment, and has the advantages of oxidation resistance, high and low temperature resistance, extreme pressure resistance, good lubrication and sealing performance and the like.

The invention relates to the technical field of oil for gear processing, and discloses oil for gear processing and a preparation method thereof. Comprising the following operation steps: step 1, heating and stirring base oil to obtain pre-dissolved base oil for later use; heating and stirring the high-molecular oil-soluble polymer to obtain a pre-dissolved high-molecular oil-soluble polymer for later use; 2, stirring and circulating the pre-dissolved base oil, adding the pre-dissolved high-molecular oil-soluble polymer at the constant temperature of 50 + / -5 DEG C, stirring and circulating until a homogeneous phase, then adding the pre-dissolved base oil, and heating and stirring at the temperature of 60 + / -5 DEG C to obtain prefabricated processing oil; 3, every 10 minutes of stirring circulation, trimethylolpropane oleate, sulfurized fatty acid ester, sulfurized olefin, a composite additive, a nonionic demulsifier and a silicon-free defoaming agent are sequentially added into the prefabricated processing oil, the pre-dissolved base oil is added, and the gear processing oil is obtained.

This invention relates to a salt spray resistant and anti-aging curing coating and its preparation method, belonging to the field of coating technology. The coating includes modified epoxy resin, ternary nanocomposite filler, composite light stabilizer, hydrophobic eutectic solvent, polysiloxane-modified aromatic amine curing agent, and bio-based polyurethane curing agent. The modified epoxy resin is prepared by reacting bisphenol F epoxy resin, KH-560 silane coupling agent, and tetrabutylammonium bromide, followed by the addition of bi-terminated epoxy silicone oil, 3,3'-dithiodipropionic acid, and p-toluenesulfonic acid, and then by adding pentaerythritol phosphate and antioxidant 1010. The polysiloxane-modified aromatic amine curing agent is prepared by reacting m-phenylenediamine as a matrix, KH-560 silane coupling agent, diphenylsilanediol, and dibutyltin dilaurate. The bio-based polyurethane curing agent is prepared by reacting castor oil-modified polyol, isophorone diisocyanate, dibutyltin dilaurate, dimethylolpropionic acid, and trimethylolpropane.

The invention relates to the technical field of coatings, and discloses a bridging agent containing a nano-material for a coating and a preparation method of the bridging agent, and the bridging agent is prepared by mixing a composite nano-material and a base material; wherein the mass fraction of the composite nano material is 7-8wt%, and the balance is the base material; the base material is polybasic isocyanate; after the prepared bridging agent is added into the coating, the bridging agent and resin components in the coating can be subjected to a cross-linking reaction, so that a more stable three-dimensional network structure can be formed, the binding force between a coating formed by the coating and a base material is higher, the adhesive force of the coating is greatly improved, and the coating is not prone to falling off.

The present invention belongs to the technical field of conveyor belts, and in particular to a shock-resistant coal mine steel wire rope core flame-retardant conveyor belt covering rubber and a preparation method thereof. In the present invention, the shock-resistant coal mine steel wire rope core flame-retardant conveyor belt covering rubber includes components such as styrene-butadiene rubber, natural rubber, a reinforcing agent, a flame retardant, an anti-aging agent, a accelerator TMTD, an accelerator CZ and sulfur, and the reinforcing agent is composed of modified nano-white carbon black, modified aramid fiber, and zinc oxide in a mass ratio of 11-14:4-7:2-5. The present invention uses dopamine self-polymerization and a grafting reaction of a silane coupling agent to chemically modify aramid long fibers, promotes the entanglement and cross-linking between aramid fibers and a rubber matrix, selects modified nano-white carbon black, modified aramid fibers and zinc oxide to form a reinforcing agent together and add it to the rubber matrix, effectively improves the mechanical properties of the covering rubber, and reduces the rolling resistance of the covering rubber, and the aramid fiber effectively improves the impact resistance of the covering rubber.