New formadehyde catching agent and its preparing method

[0029] 2) Preparation of tea polyphenols. craft

[0030] ① Use 3 to 6 times the volume of tea powder in 85% ethanol water as the extract, and extract in a water bath for 20 minutes under the condition of sufficient stirring, at 50 to 80 ° C. After filtering out the solution, add 2 to 3 times 85% ethanol water , stirred for 20 minutes, and combined the filtrates; under the pressure of 10-100Pa, distilled off ethanol in a water bath under reduced pressure to obtain a concentrated solution; the concentrated solution was extracted with double the amount of chloroform until it was colorless, and placed in a separatory funnel after shaking for 5 minutes each time Middle separation; hot air drives away residual ethanol and chloroform;

[0031] ②Extract 4 to 7 times with 1:1 ethyl acetate, and combine the extracts;

[0032] ③Under the pressure of 10-100Pa, distill the ethyl acetate under reduced pressure in a water bath, dry the concentrated solution in vacuum, and grind it while it...

[0039] 9 servings of pure tea polyphenols

[0040] Emulsifier Monoglycerin (MG), 1 part

[0041] It is added as a filler before the use of coatings and adhesives, and used after stirring.

[0043] 10 servings of pure tea polyphenols

[0044] 95 parts of water

[0045] Emulsifier diacid ester (DG) 5 parts

[0046] After the paint is applied, it is sprayed on the coated surface and in the surrounding air.