▎ 摘　　要

NOVELTY - Degradable biological masterbatch using bio-based pBAt, comprises 40-60 pts. wt. biodegradable polyester, 3-12 pts. wt. modified phenolic resin, 4-12 pts. wt. nano magnesium oxide, 2-4 pts. wt. nano silicon micro powder, 3-8 pts. wt. graphene, 2-6 pts. wt. perlite, 1-4 pts. wt. nano zinc, 2-4 pts. wt. magnesium hydroxide whisker, 5-12 pts. wt. antimony trioxide, 4-10 pts. wt. polyamide wax micro powder, 2-8 pts. wt. diazolidinyl urea and 3-5 pts. wt. polyethylene glycol. USE - Used as degradable biological masterbatch using bio-based pBAt. ADVANTAGE - The degradable biological masterbatch: is economical and has simple preparation process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the degradable biological masterbatch using bio-based pBAt, comprising (i) taking 59 pts. wt. biodegradable polyester, 5 pts. wt. modified phenolic resin, 7 pts. wt. nano magnesium oxide, 3 pts. wt. nano silicon micro powder, 5 pts. wt. graphene, 4 pts. wt. perlite, 3 pts. wt. nano zinc, 4 pts. wt. magnesium hydroxide whisker, 8 pts. wt. antimony trioxide, 4 pts. wt. polyamide wax micro powder, 3 pts. wt. diazolidinyl urea and 5 pts. wt. polyethylene glycol and taking out specific components of adipic acid and 1, 4-butanediol, (ii) mixing nano magnesium oxide, nano silicon micropowder, graphene, perlite, nano zinc, magnesium hydroxide whisker and antimony trioxide, adding the mixture into a grinder for grinding for 10-16 minutes to obtain a mixture A, adding polyamide wax micro powder and diazolidinyl urea into the mixture A, mixing, adding a small amount of medical alcohol and fully stirring at normal temperature to obtain a mixture B, adding biodegradable polyester into the mixture B, mixing and adding into a mixing roll for mixing at the mixing temperature of 180-210℃ for 20-40 minutes to obtain a mixture C, (iii) adding adipic acid and 1, 4-butanediol into a polycondensation reaction kettle according to a specific proportion, starting heating, adding a specific amount of chain extender poly alcohol after uniformly stirring, and continuously heating to perform normal pressure esterification dehydration reaction, (iv) finishing the esterification reaction, adding dimethyl terephthalate or terephthalic acid and 1, 4-butanediol in a specific proportion, stirring, adding a titanium catalyst, heating to 200℃ and reacting in esterification, ester exchange and esterification stages to obtain a byproduct, (v) completing the ester exchange/esterification stage reaction, adding a titanium catalyst, a zinc catalyst and a stabilizer, heating to 235-245℃for polycondensation reaction, slowly pumping to high vacuum, controlling the vacuum to be 100-1000 Pa and 100 Pa, cooling and pelletizing to obtain pBAt with different molecular amount by controlling the discharging torque, (vi) drying the resultant pBAt with different molecular amount and mixing the dried pBAt and modifier in a closed high-speed stirrer for 5-10 minutes to obtain a main material, (vii) adjusting the weight loss feeder parameters according to the mixture ratio, respectively adding the mixture C obtained in the step (ii) and main material and auxiliary agent present in the step (vi) into a screw extruder according to the proportion, simultaneously melting and blending, where the mixing temperature is 130-160℃, (viii) mixing common plastic resin, oxidative degradation additive and biodegradation auxiliary agent, and then adding the hydroxy-removed modified straw powder to obtain a mixture D, where the mass ratio of the common plastic resin to the dehydroxy modified straw powder is (15-50): (50-85), and (ix) mixing and extruding the mixture D to obtain the final product