653 results about "Aromatic acid" patented technology

The invention relates to a lubricating grease, comprising 40-95 wt% of a lubricating base oil, 1-59 wt% of a composite zirconium based densifier and 1-59 wt% of hexapolyurea; and the composite zirconium based densifier is a compound zirconium soap generated from reaction of higher aliphatic acid, aromatic acid, water and zirconium alkoxide. The invention also relates to a preparation method of the lubricating grease. The method comprises the following steps: subjecting the zirconium alkoxide, higher aliphatic acid and aromatic acid to a first contact reaction in lubricating base oil at 60-120 DEG C; then subjecting the mixture obtained from the first contact reaction and water to a second contact reaction at 85-100 DEG C, and heating the products obtained from the second contact reaction for dehydration; and introducing the hexapolyurea into the obtained reaction products. The lubricating grease provided by the invention has high drop point, excellent colloidal stability, and excellent extreme pressure wear resistance and ball bearing lubrication life.

The invention relates to lubricating grease, comprising 40-95 wt% of lubricating base oil, 1-59 wt% of a compound zirconium-based thickening agent and 1-59 wt% of a tetrapolyurea, wherein the compound zirconium-based thickening agent is a compound zirconium sceps formed by reacting a higher aliphatic acid, an aromatic acid and water with zirconium alkoxide. The invention also relates to a preparation method of the lubricating grease. The method comprises the steps of performing a first contact reaction on the zirconium alkoxide, the higher aliphatic acid and the aromatic acid in the lubricating base oil at a temperature of 60-120 DEG C; then performing a second reaction on the obtained mixture from the first contact reaction with water at a temperature of 85-100 DEG C; and heating the obtained product from the second reaction for dehydration; and then introducing the tetrapolyurea in the obtained reaction product. The lubricating grease has relatively high boiling point, presents excellent colloid stability and has good extreme pressure antiwear property and ball bearing lubrication life.

The present invention provides a composition, comprising: greater than about 0.1% by weight hydrogen peroxide; an aromatic acid component; surfactant; optionally, a solvent; and a carrier. The composition of the invention is useful as a disinfecting composition for killing microorganisms such as bacterium (including Mycobacterium), spores and fungi. The composition provides a pathogenic bacteria kill rate of 99.9% in about 30 seconds when bacteria are exposed to the composition and is effective in providing a Mycobacterium kill of 106 with two minutes or less. Moreover, the compositions of the invention are generally more resistant to catalase deactivation than, for example, an aqueous solution of hydrogen peroxide. The concentration of hydrogen peroxide within the composition may range from about 1% by weight to about 7% by weight and the concentration of aromatic acid component may range from about 0.1% by weight to about 5% by weight. The invention also provides a method for disinfection of a substrate utilizing the composition. The composition of the invention may be used in the foregoing method on a medical instrument, such as an endoscope or the like. Applying the compositions to a substrate may be accomplished in any of a variety of application methods such as by roll coating, dipping, spraying, or rotational tumbling. The composition may be applied to the substrate for a period of time ranging from about 30 seconds to about ten minutes. In this aspect, the invention can further comprise drying the substrate after removing the composition.

The invention discloses a hard polyimide foaming structural material and a preparation method thereof. The method comprises the following steps of: mixing aromatic dianhydride and / or aromatic acid ester, high molecular alcohol, low molecular alcohol, a catalyst and a surfactant according to a ratio into a polar solvent and reacting to form polyimide foam precursor solution; reacting the precursor solution with isocyanate in a die; pressurizing and foaming to form a polyimide foam intermediate; and performing microwave radiation or / and performing heat curing by using an oven to obtain the hard polyimide foaming structural material. The preparation process route is short and the process is simple; the storage stability of the foam precursor solution is high; and the prepared hard polyimide foaming structural material has uniform aperture, hard quality, high strength, low density and high temperature resistance, is non-toxic and environmentally-friendly in the foaming process and easy to industrialize, and can be applied in the fields of electron, carrier rockets, aviation, ships, railway locomotives and the like.

The invention relates to a gas conveying pipeline drag reducer used in gas and particularly natural gas conveying pipeline drag reduction and a preparation method thereof, relating to a macromolecular compound composition and the pipeline system technical field. The gas conveying pipeline drag reducer is characterized in that: the drag reducer consists of pyridine, secondary amine, formaldehyde or acetaldehyde, aromatic acid and deionized water; when total weight is counted as 100 percent, the compositions in percentage by weight are: 10 to 20 percent of the pyridine, 20.4 to 28.4 percent of the secondary amine, 7.6 to 8.4 percent of the formaldehyde or the acetaldehyde, 37 to 38.4 percent of the aromatic acid and 13 to 15 percent of the deionized water. The preparation method comprises the following steps that: the pyridine and the secondary amine in proportional quantities are added in a container and are mixed evenly; the formaldehyde or the acetaldehyde in proportional quantity is dripped to carry out reaction; the aromatic acid in proportional quantity is added, and the deionized water in proportional quantity is dripped so as to carry out reaction continuously; and finally, redundant water is removed, and a target product is obtained after purification. The gas conveying pipeline drag reducer has direct source of raw materials; moreover, the preparation method has simple process, convenient operation and moderate reaction conditions, and a product prepared by the method has excellent drag reduction effect.

Floor finishes are stripped or deep scrubbed using a floor stripper / cleaner composition containing sparingly water-soluble floor finish solvent; water; sulfonic acid, sulfate acid, phosphonic acid, phosphate acid or aromatic acid coupler in an amount sufficient to provide a homogenous aqueous liquid phase and no or low foaming during shaking; and sufficient organic amine so that the composition pH is about 2 to about 11.