▎ 摘　　要

NOVELTY - Preparing butylbenzene latex comprises e.g. (i) vacuum pumping polymerization reaction kettle, adding 15-20 pts. wt. de-ionized water into the reaction kettle, adding 0.1- 0.5 pts. wt. electrolyte, 0.01-0.5 pts. wt. pH buffering agent and 0.01-0.2 pts. wt. chelating agent, heating, adding 1-1.5 pts. wt. anionic emulsifier and 0.1-0.3 pts. wt. non- ionic emulsifier into reaction kettle, taking out 2-5 pts. wt. reaction liquid from the reaction kettle, dropping 0.5-1.5 pts. wt. nano graphene powder and 0.1-0.3 pts. wt. coupling agent into blend, dispersing to obtain nano graphene pre-emulsified liquid, dripping nano graphene pre-emulsion uniformly into reaction kettle, dropping for 0.5-1 hours, heating to 60-80 degrees C, adding 0.1-0.2 pts. wt. initiator and 0.001-0.005 pts. wt. catalyst, reacting, adding 1-2 pts. wt. unsaturated monomer and 5-10 pts. wt. de- ionized water mixed solution, preserving temperature and reacting for 3-4 hours to prepare modified nano graphene seed emulsion. USE - The butylbenzene latex is useful for cathode of lithium ion battery (claimed). ADVANTAGE - The latex: has high temperature and aging resistance, electrical and thermal conductivity, stronger covering and bonding properties; and can improve energy and power density of lithium ion battery with a longer service life thus reduces cost of the lithium ion battery. DETAILED DESCRIPTION - Preparing butylbenzene latex comprises (i) vacuum pumping the polymerization reaction kettle, adding 15-20 pts. wt. de-ionized water into the reaction kettle, adding 0.1- 0.5 pts. wt. electrolyte, 0.01-0.5 pts. wt. pH buffering agent and 0.01-0.2 pts. wt. chelating agent, heating to 40-50 degrees C, adding 1-1.5 pts. wt. anionic emulsifier and 0.1-0.3 pts. wt. non- ionic emulsifier into the reaction kettle after anion emulsifier completely dissolving and dispersing uniformly, taking out 2-5 pts. wt. reaction liquid from the reaction kettle, dropping 0.5-1.5 pts. wt. nano graphene powder and 0.1-0.3 pts. wt. coupling agent into the blend, dispersing at high speed for 1-2 hours in the high speed dispersion machine to obtain the nano graphene pre-emulsified liquid, dripping the nano graphene pre-emulsion uniformly into the reaction kettle, dropping for 0.5-1 hours, heating to 60-80 degrees C, adding 0.1-0.2 pts. wt. initiator and 0.001-0.005 pts. wt. catalyst, reacting for 0.5-1 hours, adding 1-2 pts. wt. unsaturated monomer and 5-10 pts. wt. de- ionized water mixed solution, preserving temperature and reacting for 3-4 hours to prepare modified nano graphene seed emulsion; (ii) adding 35-45 pts. wt. de-ionized water and 0.4-1 pts. wt. initiator into the sealing material tank, stirring fully and dissolving uniformly to prepare initiator dropping phase; (iii) adding 45-55 pts. wt. de-ionized water, 1-2.5 pts. wt. anionic emulsifier, 0.4-0.7 pts. wt. non-ionic emulsifier and 3-5 pts. wt. unsaturated imide monomer into the sealed ingredient tank, adding 0.01-1 pts. wt. pH buffering agent and 0.1-1 pts. wt. electrolyte, stirring and dispersing for 1-1.5 hours to prepare aqueous phase pre-emulsion; (iv) adding 30-50 pts. wt. styrene and 0.5-0.8 pts. wt. molecular weight regulator into the sealing material tank to prepare dripping oil phase; (v) adding the aqeous phase pre-emulsion prepared in the first batch step (iii) into the modified nano graphene seed emulsion prepared in step (i), heating to 80-90 degrees C, starting dropping initiator dripping phase prepared in step (ii) 50-70 pts. wt. butadiene, dripping oil phase prepared in step (iv) and aqueous phase pre-emulsion prepared in the residual step (iii), dropping all the raw materials for 3-5 hours, heating the reaction system to 85-95 degrees C, maintaining the temperature for 2-4 hours, sampling, measuring solid content every 1-2 hours, calculating the conversion rate, when the conversion rate of the reaction system reaches more than 95 %, stopping heat preservation reaction and cooling; (vi) cooling to 60-70 degrees C, adding 0.01-0.5 pts. wt. neutralizing agent and 0.01-0.5 pts. wt. termination agent, dropping to dispersion reaction for 2 hours, neutralizing the pH value to 6-8, vacuumizing and degassing for 30-50 minutes, cooling to less than 40 degrees C, discharging and filtering.