▎ 摘　　要

NOVELTY - Method for preparing thickener, involves taking 10-15 pts. wt. polyvinyl alcohol resin, 10-15 pts. wt. diisocyanate, 10-15 pts. wt. paraffin, 3-5 pts. wt. antioxidant, 5-10 pts. wt. dispersant, 5-10 pts. wt. polyethylene glycol, 1-2 pts. wt. chain extender and 2-3 pts. wt. graphene powder, (b) removing chain extender and graphene powder, adding other ingredients to container, performing pneumatic stirring process under heating environment to obtain thickener semi-finished product, where pneumatic stirring process involves (i) rapidly inflating from bottom of container, so that the fountain pneumatic strip is pushed up quickly, and (ii) quickly drawing charged gas, and enabling fountain type pneumatic strip to fall back rapidly, repeating the operation of inflating and exhausting, and (c) adding chain extender and graphene powder to semi-finished product of thickener, and performing pneumatic stirring process for 1.5-2 hours to obtain thickener. USE - Method for preparing thickener. ADVANTAGE - The method avoids the introduction of external air, effectively accelerates the overflow of internal air, improves the preparation efficiency, avoids the situation that the bubbles are adsorbed on the inner wall of container, further speeds up the overflow of bubbles in raw materials, effectively reduces the air content in thickener product, and ensures excellent quality of thickener.