Anti-scratch paint protecting film and preparation method thereof

[0037] A preparation method for an anti-scratch paint surface protection film, comprising the following steps:

[0038] 1) Synthesis of 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde;

[0039] Mix 3,3,3-trifluoropropanal and NaOH solution with a concentration of 2mol / L, the mass ratio of 3,3,3-trifluoropropanal and NaOH solution is 1:5, react, and the reaction temperature is 40°C , the reaction time is 2h, separated and purified to obtain 3-hydroxyl-2,4-bis(trifluoromethyl)-butyraldehyde, the structural formula is:

[0040]

[0041] 2) Synthesis of dialdehyde containing fluorine silicon;

[0042] The 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde was then combined with 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxane Alkanediol was added to acetone, 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde and 1,1,3,3,5,5,7,7-octamethyl-1,7- The molar ratio of tetrasiloxanediol is 3:1, and the mass ratio of acetone to 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxanediol is 5: 1. Rea...

[0053] A preparation method for an anti-scratch paint surface protection film, comprising the following steps:

[0054] 1) Synthesis of 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde;

[0055] Mix 3,3,3-trifluoropropanal and NaOH solution with a concentration of 4mol / L, the mass ratio of 3,3,3-trifluoropropanal and NaOH solution is 1:7, react, and the reaction temperature is 50°C , the reaction time is 3h, separated and purified to obtain 3-hydroxyl-2,4-bis(trifluoromethyl)-butyraldehyde, the structural formula is:

[0056]

[0057] 2) Synthesis of dialdehyde containing fluorine silicon;

[0058] 3-Hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde was then combined with 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxane di Alcohol added to acetone, 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde and 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasilyl The molar ratio of oxanediol is 4:1, the mass ratio of acetone to 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxanediol is 10:1, Reaction, the...

[0069] A preparation method for an anti-scratch paint surface protection film, comprising the following steps:

[0070] 1) Synthesis of 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde;

[0071] Mix 3,3,3-trifluoropropanal and NaOH solution with a concentration of 3mol / L, the mass ratio of 3,3,3-trifluoropropanal and NaOH solution is 1:6, react, and the reaction temperature is 45°C , the reaction time is 2.5h, separated and purified to obtain 3-hydroxyl-2,4-bis(trifluoromethyl)-butyraldehyde, the structural formula is:

[0072]

[0073] 2) Synthesis of dialdehyde containing fluorine silicon;

[0074] 3-Hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde was then combined with 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxane di Alcohol added to acetone, 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde and 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasilyl The molar ratio of oxanediol is 3.5:1, and the mass ratio of acetone to 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxanediol is 8: 1. React...