A kind of preparation method of side chain fluorine-containing degradable polyurethane resin
A polyurethane resin and side chain technology, which is applied in the field of preparation of side chain fluorine-containing degradable polyurethane resin for antifouling coatings, can solve the problems of destroying the marine ecological environment, etc., and achieve good antifouling effect, adhesion inhibition, and good adhesion effect
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Embodiment 1
[0022] Example 1: Dissolve and disperse 10g of polymethacrylate-2-hydroxyethyl methacrylate in xylene and pour it into a three-necked flask, add 10.66g of isophorone diisocyanate under ice-water bath conditions, add 0.15g (0.5ωt% ) catalyst dibutyltin dilaurate, gradually heated up to 40°C for 2 hours at a speed of 250r / min to prepare a group-modified acrylic resin; 17.47g of 1H,1H,2H,2H-perfluoro-1-octanol Add 10.66g of isophorone diisocyanate in an ice-water bath, add 0.23g (0.5ωt%) catalyst dibutyltin dilaurate, and gradually raise the temperature to 40°C for 2 hours at 250r / min; weigh 38.4 gPEG 800 Slowly drop into a three-necked flask equipped with group-modified acrylic resin, heat to 50°C for 2 hours at a speed of 250r / min, and then drop into the modified 1H, 1H, 2H, 2H-perfluoro-1 - Octanol was heated to 60°C for 2 hours, and after the reaction was completed, it was purified and filtered.
[0023] image 3 It is the infrared spectrogram of the side chain fluorine-co...
Embodiment 2
[0024] Example 2: Dissolve and disperse 10g poly-2-hydroxyethyl methacrylate in xylene and pour it into a three-necked flask, add 10.66g isophorone diisocyanate under ice-water bath conditions, add 0.08g (0.25ωt% ) catalyst dibutyltin dilaurate, gradually heated up to 40°C for 2 hours at a speed of 250r / min to prepare a group-modified acrylic resin; 13.98g of 1H,1H,2H,2H-perfluoro-1-octanol Disperse in tetrahydrofuran, add 8.53g isophorone diisocyanate under the condition of ice-water bath, add 0.09g (0.25ωt%) catalyst dibutyltin dilaurate, and gradually heat up to 40°C at 250r / min to react for 2h; weigh 23.04 gPEG 600 Slowly drop into a three-necked flask equipped with group-modified acrylic resin, heat to 50°C for 2 hours at a speed of 250r / min, and then drop into the modified 1H, 1H, 2H, 2H-perfluoro-1 - Octanol was heated to 60°C for 2 hours, and after the reaction was completed, it was purified and filtered.
Embodiment 3
[0025] Example 3: Dissolve and disperse 10g of polymethacrylate-2-hydroxyethyl methacrylate in xylene and pour it into a three-necked flask, add 10.66g of isophorone diisocyanate under ice-water bath conditions, add 0.15g (0.5ωt% ) Catalyst dibutyltin dilaurate, gradually heated up to 40°C at 250r / min and reacted for 2h to prepare a group-modified acrylic resin; 13.98g1H,1H,2H,2H-perfluoro-1-octanol Add 8.53g of isophorone diisocyanate in an ice-water bath, add 0.18g (0.5ωt%) catalyst dibutyltin dilaurate, and gradually heat up to 40°C for 2 hours at 250r / min; weigh 19.2 gPEG 400 Slowly drop into a three-necked flask equipped with group-modified acrylic resin, heat to 50°C for 2 hours at a speed of 250r / min, and then drop into the modified 1H, 1H, 2H, 2H-perfluoro-1 - Octanol was heated to 60°C for 2 hours, and after the reaction was completed, it was purified and filtered.
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