A kind of preparation method of paint surface long-term protective coating
A technology for protecting coatings and paint surfaces, applied in the direction of anti-fouling/underwater coatings, coatings, paints containing biocide, etc., can solve the problems of inability to protect the paint surface for a long time, insufficient weather resistance, poor density, etc., to achieve High density, simple use process, good stain resistance effect
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[0025] The preparation method of the paint surface long-lasting protective coating according to the embodiment of the present invention comprises the following steps: uniformly mixing the functional group polymerized silicone resin and an alcohol solvent in an inert gas atmosphere, then adding a perfluoropolyether siloxane solution and mixing uniformly, Seal and preserve to obtain the described paint surface protection coating.
[0026] By mass percentage:
[0027] Functional group polymerized silicone resin 30%-40%;
[0028] Perfluoropolyether siloxane solution 30%-45%;
[0029] Alcohol solvent 20% -35%.
[0030] Wherein, described paint surface protective coating has general formula:
[0031]
[0032] Among them, R 1 , R 3 , R 4 is an alkane group with the structural formula C m h 2m+1 (m≥1); R 2 It is a C-N chain formed after cross-linking of functional groups; PFPE is a perfluoropolyether chain.
[0033] Among them, the molar quantity of functional group polym...
Embodiment 1
[0047] Take 0.5mol phenyltrimethoxysilane and 1mol methyltrimethoxysilane and mix them uniformly in a nitrogen atmosphere, and add 0.8mol isocyanatopropyltrimethoxysilane in a nitrogen atmosphere, stir for 3 minutes, and mix them uniformly. Take 0.8 mol of aminopropyltriethoxysilane, and slowly add it into the above mixed solution while stirring under the same nitrogen atmosphere. After the dropwise addition, seal the reaction vessel and keep stirring for 45 minutes. The whole addition, mixing and stirring process should be kept under nitrogen atmosphere. Finally, it was sealed and left for 3 days at 25 degrees Celsius to obtain a functional group polymerized silicone resin (component 1).
[0048] Add 1 part by weight of perfluoropolyether trimethoxysilane and 3 parts by weight of perfluorooctyl triethoxysilane into 96 parts by weight of nonafluorobutyl ether, and stir evenly to obtain perfluoropolyether Silicone solution (component 2).
[0049]30 parts by weight of function...
Embodiment 2
[0052] Take 0.8mol phenyltrimethoxysilane and 0.8mol methyltrimethoxysilane and mix them uniformly in a nitrogen atmosphere, and add 1mol 3-isocyanatopropyltrimethoxysilane in a nitrogen atmosphere, stir for 3min, and mix them Evenly, take 1mol of 3-aminopropyltrimethoxysilane, and slowly add it into the above mixed solution while stirring under the same nitrogen atmosphere. After the dropwise addition, seal the reaction vessel and keep stirring for 45 minutes. The whole addition, mixing and stirring process should be kept under nitrogen atmosphere. Finally, it was sealed and left for 3 days at 25 degrees Celsius to obtain a functional group polymerized silicone resin (component 1).
[0053] Add 1 part by weight of perfluoropolyether trimethoxysilane and 5 parts by weight of perfluorooctyl triethoxysilane into 94 parts by weight of nonafluorobutyl ether, and stir evenly to obtain perfluoropolyether Silicone solution (component 2).
[0054] 30 parts by weight of functional gr...
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