3results about How to "Control reaction speed" patented technology

The invention provides high-molecular-weight low-viscosity polyether polyol and a preparation method and application thereof.The preparation method includes the step that mixed dihydric alcohol serves as an initiator and reacts with an epoxy compound under the action of a double-metal cyanide complex catalyst and an auxiliary acid, and the mixed dihydric alcohol contains propylene glycol and bifunctional polyether polyol. By adopting the technical scheme provided by the invention, the ultra-high molecular weight and low viscosity polyether polyol for the MS adhesive can be prepared.

This invention discloses a method for hydrolyzing high-F-value titanium liquid, as well as the hydrolyzed material and titanium dioxide, comprising the following steps: S1. Preparing the hydrolyzed titanium liquid and heating it; preparing seed crystal preparation titanium liquid and alkaline solution; S2. When the hydrolyzed titanium liquid reaches 80-85℃, heating the seed crystal preparation titanium liquid and the alkaline solution to 50-60℃ respectively; S3. Adding the seed crystal preparation titanium liquid to the alkaline solution, heating to 92-95℃, and maintaining the temperature until the final stability of the hydrolyzed seed crystals is 90-100ml, at which point the preparation of the hydrolyzed seed crystals is complete; S4. Stopping the heating when the temperature of the hydrolyzed titanium liquid reaches 92-95℃, adding the prepared hydrolyzed seed crystals, and stirring; S5. Heating the hydrolyzed titanium liquid to boiling, maintaining a gentle boil, and when the hydrolyzed titanium liquid turns white, adding dilution water until the hydrolysis is complete. The prepared hydrolyzed seed crystals have uniform grain size, the hydrolyzed material has uniform particle size, the hydrolysis quality of the high-F-value hydrolyzed titanium liquid is high, and the water washing time is short.

The application discloses a kind of gel PMMA slurry, diaphragm lithium battery and preparation method thereof.Gel PMMA slurry preparation method includes the following steps: step 1: methyl methacrylate is added to N-methyl pyrrolidone, and stirred uniformly;Then initiator azobisisobutyronitrile is added, and stirred min;Subsequently, temperature is raised to 50-70℃, and the heating rate is 3-5℃ / min, keep 30-50min, then continue to heat to 80-90℃, keep 2-4h, and the heating rate is 3-5℃ / min, then cool to room temperature to obtain PMMA gel;Step 2: alumina powder is added to N-methyl pyrrolidone, and stirred 30-40min;Then use bar pin type sand mill to sand mill to obtain inorganic powder solution;Step 3: PMMA gel prepared in step 1 is added to the inorganic powder solution obtained in step 2, and stirred to mix uniformly;Then dimethyl carbonate is added, and stirred to obtain gel PMMA slurry.The prepared gel PMMA coated diaphragm has great adhesion to pole piece and higher liquid absorption rate and liquid retention rate.