38results about How to "Strong resistance to hydrolysis" patented technology

The invention discloses a long-acting antibacterial material, a dental film and a long-acting invisible appliance. The long-acting antibacterial material includes PETG resin and modified tourmaline; wherein, the mass ratio of PETG resin and modified tourmaline is 10 ~50:1; the preparation method of described modified tourmaline is: step S1, after nano tourmaline is processed through concentrated sulfuric acid, obtain porous nano tourmaline; Step S2, after porous nano tourmaline is processed through glycerin, obtain Hydroxylated porous nano-tourmaline; step S3, grafting hydroxylated porous nano-tourmaline with limonin to obtain modified tourmaline. The present invention combines PETG resin with modified tourmaline to prepare a safe, non-toxic, strong antibacterial effect and long-lasting antibacterial antibacterial material, and the present invention also applies the antibacterial material to dental diaphragms and invisible In orthotics.

The invention discloses a method for preparing a nano-loaded titanium-based composite catalyst. The titanium-based compound, tetraethyl orthosilicate and a hydrolyzing agent are dissolved in absolute ethanol, and stirred and reacted at room temperature for a certain period of time to obtain a mixed solution; Add one or more metal salts selected from chlorides, acetates or phosphates of Mg, Al, Mn, Co, Zn to the mixed solution, continue stirring, and heat up to volatilize excess solvent to obtain a gel; The gel is subjected to supercritical drying in the presence of a supercritical medium to obtain the final nano-loaded titanium-based composite catalyst. The catalyst prepared by the invention has strong hydrolysis resistance, can be stored for a long time, and has stable activity; has high catalytic activity and good stability, can effectively improve the efficiency of esterification and polycondensation reactions, has stable performance during the reaction process, and has stable product indicators; the catalyst is not Contains heavy metals, reducing the harm to the environment and human beings; the polyester prepared by using this catalyst has good hue, low yellow index and stable performance.

The invention discloses a well drilling waste brick making method. The well drilling waste brick making method comprises the following steps that dirt elimination and desiccation treatment is conducted on well drilling waste to be treated with a dirt elimination and desiccation agent; a construction binding material and a construction aggregate are added to the well drilling waste, to be treated, obtained after dirt elimination and desiccation treatment, even mixing is conducted, and then a brick making mixture is obtained; the brick making mixture is solidified and pressed to be green bricks with the density not smaller than 80% by means of a static pressure type brick making machine; strength maintenance is conducted on the green bricks; the green bricks obtained after strength maintenance is completed are sprinkled or coated with waterborne waterproof coating or dipped in the waterborne waterproof coating, so that an environment-friendly blocking layer with the thickness being 1-10 mm is formed on the surfaces of the green bricks obtained after strength maintenance is completed, and then the finished bricks are made. By the adoption of the well drilling waste brick making method, the well drilling waste can be processed into the brick making raw material which is loose and dry and meets relative environment-friendly standard at a low cost, the brick making raw material can be finally made into the finished bricks which are ideal in compressive strength, ageing resistance, hydrolysis resistance, freezing-thawing resistance, corrosion resistance and environmental protection stability, and therefore harmless and resourceful treatment of the well drilling waste is achieved.

The invention relates to a method for preparing a milt-functional metal surface treatment additive containing boride diethanolamine phosphates, which comprises steps: diethanolamine and phosphate esterification agents are added into a reaction kettle to react, are hydrolysed and concentrated to obtain a viscous liquid, a water-carrying agent is added into the viscous liquid, a boriding agent is added to react by stirring, and the water-carrying agent is boiled up by decompressing to obtain a target product. The milt-functional metal surface treatment additive which is prepared through the method comprises 30-60% boride diethanolamine phosphates and 20-60% diethanolamine double phosphate esters. The method for preparing the milt-functional metal surface treatment additive containing the boride diethanolamine phosphates has the beneficial effects that the milt-functional metal surface treatment additive containing the boride diethanolamine phosphates has excellent antifriction, antioxidant, rust-proof and lubrication performance and the like because phosphates which are used as main components in the milt-functional metal surface treatment additive containing the boride diethanolamine phosphates contain active elements such as N, P and B and the like, is strong in anti-hydrolytic property, can improve lubricity and anti-rust property of a water-base metal working fluid by being added into the water-base metal working fluid, also can improve extreme pressure property and prolongs service life of the water-base metal working fluid simultaneously, and is an excellent multi-functional water-soluble additive.