Anti-fingerprint fluoride-free coating and preparation method thereof

[0056] A preparation method of an anti-fingerprint fluorine-free coating, comprising the following steps:

[0057] (1) Preparation of hyperbranched polyols:

[0058] Add 88.8 parts of isophorone diisocyanate to the reaction vessel, vacuumize at 110°C for 30 minutes, add 1.19 parts of dibutyltin dilaurate, add 29.8 parts of pentaerythritol dropwise, keep the reaction at 70°C for 1.5h, then add 119.2 parts dropwise Capped with pentaerythritol, kept at 70°C for 3 hours, and dried to obtain hyperbranched polyols;

[0059] (2) Preparation of semi-addition acrylate modified silicone resin:

[0060] Add 105.5 parts of isophorone diisocyanate into the reaction vessel, vacuumize at 110°C for 30 minutes, add 200 parts of hydroxy polysiloxane, 4.0 parts of dibutyltin dilaurate catalyst and keep it at 90°C for 1 hour, then put 6.0 parts of Add 1,4-butanediol dropwise into the reaction vessel, keep the temperature at 90°C for 2 hours, then cool down to 75°C, add 2.0 parts of p-hydroxyanisol

[0066] A preparation method of an anti-fingerprint fluorine-free coating, comprising the following steps:

[0067] (1) Preparation of hyperbranched polyols:

[0068] Add 88.8 parts of isophorone diisocyanate to the reaction vessel, vacuumize at 110°C for 35 minutes, add 1.9 parts of stannous octoate, dropwise add 29.8 parts of pentaerythritol, keep the reaction at 75°C for 1 hour, then add dropwise 119.2 parts of pentaerythritol to seal end, heat preservation reaction at 70°C for 3h, and dry to obtain hyperbranched polyol;

[0069] (2) Preparation of semi-addition acrylate modified silicone resin:

[0070] Add 195.4 parts of isophorone diisocyanate into the reaction vessel, vacuumize at 110°C for 35 minutes, add 300 parts of hydroxy polysiloxane, 2.9 parts of stannous octoate catalyst, keep the reaction at 85°C for 1.5 hours, and then put 11.8 Parts of 1,6-hexanediol were added dropwise to the reaction vessel, and after heat preservation at 90°C for 2 hours, the temperature was

[0075] (1) Preparation of hyperbranched polyols:

[0076] Add 50.4 parts of 1,6-hexamethylene diisocyanate into the reaction vessel, vacuumize at 110°C for 30 minutes, add 1.0 parts of bismuth neodecanoate, add dropwise 13.4 parts of trimethylolpropane, and keep the reaction at 70°C After 2 hours, add 40.2 parts of trimethylolpropane dropwise, keep the temperature at 70°C for 3 hours, and dry to obtain hyperbranched polyols;

[0077] (2) Preparation of semi-addition acrylate modified silicone resin:

[0078] Add 142.8 parts of 1,6-hexamethylene diisocyanate into the reaction vessel, vacuumize at 110°C for 30 minutes, add 150.0 parts of hydroxy polysiloxane, 3.5 parts of bismuth neodecanoate catalyst, and keep the reaction at 90°C for 1 hour , and then add 21.2 parts of diethylene glycol dropwise into the reaction vessel, keep the temperature at 85°C for 2 hours, then cool down to 75°C, add 2.6 parts of 2,5-di-tert-butylhydroquinone, dropwise 119.2 parts of pentaerythritol triac