A volume-absorbing solar selective heat-absorbing coating and its preparation method and application
A technology of heat-absorbing coatings and solar energy, applied in the direction of radiation-absorbing coatings, coatings, etc., can solve the problem of high thermal radiation rate, and achieve the effects of low thermal radiation rate, good weather resistance, and high solar energy utilization rate
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Embodiment 1
[0034] Embodiment 1: Preparation of solar energy selective heat-absorbing coating
[0035] The basic formula is shown in Table 1, and the specific preparation method is as follows:
[0036] Add dispersant BYK-161 to part of n-propyl acetate and dimethyl succinate, stir well to dissolve. Add iron-manganese black powder, copper oxide powder, and Degussa 4# carbon black to the above mixed solution, stir and disperse for 2 hours, grind to the specified fineness with a sand mill, and prepare carbon black-iron-manganese black composite slurry Then add DSM resin URACRON CR204CM40, fully etherified amino resin, p-toluenesulfonic acid, Lianjie YX-909-B-72, the remaining n-propyl acetate and dimethyl succinate in sequence In the above carbon black-iron manganese black composite slurry, disperse at a high speed for 1 hour; then add leveling agent BYK-340 and defoamer BYK-066N, and disperse at a high speed for 0.5 hours to obtain a coating.
[0037] The formula of table 1 solar energy s...
Embodiment 2
[0039] Embodiment 2: Preparation of solar energy selective heat-absorbing coating
[0040] The basic formula is shown in Table 2, and the specific preparation method is as follows:
[0041]Add dispersant BYK-161 to part of methyl isobutyl ketone and ethyl acetate, stir evenly to dissolve it. Add iron-manganese black powder, copper oxide powder, and Cabot 330R to the above mixed solution, stir and disperse for 2 hours, grind to a specified fineness with a sand mill, and prepare carbon black-iron-manganese black composite slurry; Add DSM resin URACRON CR204C M40, partially methylated amino resin, p-toluenesulfonic acid, Lianjie YX-909-B-72, the remaining methyl isobutyl ketone and ethyl acetate to the above carbon black- In the iron-manganese black composite slurry, disperse at a high speed for 1 hour; then add leveling agent BYK-340 and defoamer BYK-066N, and disperse at a high speed for 0.5 hours to obtain a coating.
[0042] Table 2 The formula of solar energy selective hea...
Embodiment 3
[0044] Embodiment 3: Preparation of solar energy selective heat-absorbing coating
[0045] The basic formula is shown in Table 3, and the specific preparation method is as follows:
[0046] Add dispersant BYK-161 to part of ethyl acetate and methyl butanone, stir well to dissolve. Add iron-manganese black powder, copper oxide powder, and Cabot 330R to the above mixed solution, stir and disperse for 2 hours, grind to a specified fineness with a sand mill, and prepare carbon black-iron-manganese black composite slurry; Add DSM resin URACRON CR204C M40, partially methylated amino resin, p-toluenesulfonic acid, Lianjie YX-909-B-72, the remaining ethyl acetate and methyl butanone to the above carbon black-iron In the manganese black composite slurry, disperse at a high speed for 1 hour; then add leveling agent HENSIC H-143 and defoamer BYK-066N, and disperse at a high speed for 0.5 hours to obtain a coating.
[0047] Formulation of table 3 solar energy selective heat-absorbing co...
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