4results about How to "Tight molecular structure" patented technology

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 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.

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.