Weatherability type polyformaldehyde material and its preparation method

[0035] Example 1

[0036] Add 1000 g of polyoxymethylene to 10 g of liquid paraffin, mix well, then add 3 g of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol, dilauryl thiodipropionate 1.5g, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole 0.5g, succinic acid and 4-hydroxy-2,2,6, 0.5g of 6-tetramethyl-1-piperidinol polymer, fully stirred and mixed evenly, then placed in a twin-screw extruder, melted, blended and extruded at a temperature of 140-220°C, and then pelletized by a pelletizer , to obtain a weather-resistant polyoxymethylene material, which is injection molded at a temperature of 170-190°C.

[0037] Example 2

[0038] Add 1000 g of polyoxymethylene to 10 g of liquid paraffin, mix well, then add 30 g of nano-zinc oxide, 3 g of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, dithiodi Dilauryl propionate 1.5g, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole 0.5g, succinic acid and 4-hydroxy-2 , 0.5g of the polymer of 2,6,6-tetramethyl-1-piperidinol, fully stirred and mixed evenly, then placed in a twin-screw extruder, melted and blended at a temperature of 150-210°C, and then The weather-resistant polyoxymethylene material is obtained by cutting pellets with a pelletizer, and injection molding is performed at a temperature of 170-200°C.

[0039] Example 3

[0040] Add 1000 g of polyoxymethylene to 20 grams of liquid paraffin, mix well, then add tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol 3 g, dilauryl thiodipropionate 1.5g, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole 0.5g, stir well and mix well, then place in twin-screw extruder , melt blending and extrusion at a temperature of 140-210°C, and then pelletized by a pelletizer to obtain a weather-resistant polyoxymethylene material, which is injection-molded at a temperature of 170-200°C.