Crosslinked (meth)acrylic acid copolymer and secondary-cell electrode employing the same
A cross-linked copolymer and acrylic technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient stability of secondary battery performance and insufficient solvent stability, etc., and achieve high coating and flow Performance improvement and crack suppression effect
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Embodiment 1
[0084] 22.50 g (100 mmol) of 2,2,6,6-tetramethyl-4-piperidinyl methacrylate and 0.30 g of 1,9-nonanediol dimethacrylate were charged into an Erlenmeyer flask with an inner volume of 200 ml. g (1.0mmol), 0.34g (1.0mmol) of n-stearyl methacrylate, 0.34g (1.4mmol) of 2,2'-azobis-2,4-dimethylvaleronitrile as a polymerization initiator, and Toluene 26ml, mixed to obtain a homogeneous solution.
[0085] Then, in a 4-necked flask with a volume of 500 ml including a stirrer, a nitrogen gas introduction tube, a thermometer, and a reflux cooling tube, 200 ml of water and partially saponified polyvinyl alcohol (saponification degree: 87%, polymerization degree: 2000 ) 3.0 g, mixed, and while maintaining the solution at 25° C., the above-mentioned homogeneous solution was added under stirring to disperse it. Next, after blowing nitrogen gas to remove oxygen in the reaction system, the mixture was reacted at 60° C. for 6 hours while stirring. After the reaction, the reaction solution was...
Embodiment 2
[0089] 22.50 g (100 mmol) of 2,2,6,6-tetramethyl-4-piperidinyl methacrylate and 0.30 g of 1,9-nonanediol dimethacrylate were charged into an Erlenmeyer flask with an inner volume of 200 ml. g (1.0 mmol), 0.34 g (1.0 mmol) of n-stearyl methacrylate and 26 ml of toluene were mixed to obtain a homogeneous solution.
[0090] Next, 200 ml of water, 3.0 g of sodium dodecylbenzenesulfonate as a surfactant, and 3.0 g of sodium dodecylbenzenesulfonate as a polymerization initiator were placed in a 500-ml 4-necked flask equipped with a stirrer, a nitrogen gas introduction tube, a thermometer, and a reflux cooling tube. Potassium persulfate 0.38 g (1.4 mmol) was mixed, and while maintaining the solution at 25° C., the above-mentioned homogeneous solution was added and dispersed under stirring. Next, after blowing nitrogen gas to remove oxygen in the reaction system, the mixture was reacted at 60° C. for 6 hours while stirring. After the reaction, the reaction solution was cooled to room...
Embodiment 3
[0094]In Example 1, except that 3.29 g (11.1 mmol) of 1,9-nonanediol dimethacrylate was used instead of 0.30 g (1.0 mmol) of 1,9-nonanediol dimethacrylate, and In Example 1, 24.5 g (yield: 93.8%) of a white powder polymerization product was obtained in the same manner. The H-NMR of the polymerization reaction product of the obtained white powder was measured, and peaks were found at 5.07, 3.91, 1.88, 1.24, 1.21, 1.17, 0.94, and 0.73 ppm. Among these peaks, the peak found at 3.91 ppm was derived from n-stearyl methacrylate.
[0095] Next, 9.6 g of the red powder methacryl-type crosslinked copolymer were obtained by performing the same operation as Example 1 about the obtained polymerization reaction product.
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