WATER REPELLENT COATING FILM, METHOD AND APPARATUS FOR MANUFACTURING THE SAME, AND WATER REPELLENT COATING MATERIAL COMPOSITION

摘要

BY FORMING A FILM THAT COMPRISES A MICROCRYSTALLINE POLYMER (33) HAVING AT LEAST A FLUOROCARBON GROUP AND HAS A ROUGH SURFACE ON A SURFACE OF A BASE MATERIAL, SUPER-WATER-REPELLENCY IS PROVIDED, THE DEW CONDENSATION WATER OF AN AIR CONDITIONER (25), FOR EXAMPLE, CAN BE EASILY REMOVED, AND THE FREEZING OF THE FIN OF THE HEAT EXCHANGER CAN BE PREVENTED. A FIN (11) THAT IS MADE OF ALUMINIUM IS COATED WITH A SOLUTION FOR FORMING A COATING FILM, IN WHICH CF3(CF2),-(CH2)2-SICL3 IS DILUTED WITH NONAQUEOUS CYCLOHEXAMETHYL TRISILOXANE AT A CONCENTRATION OF 10 VOL. FOR PREPARATION, TO A THICKNESS OF 1 TO 10 mM BY A BRUSH, AND THEN THE CYCLOHEXAMETHYL TRISILOXANE IS VAPORIZED IN AN ATMOSPHERE HAVING A RELATIVE HUMIDITY OF ABOUT 75AT ROOM TEMPERATURE. CF3(CF2),-(CH2)2-SICL3 THAT REMAINED ON THE FIN IS RAPIDLY HYDROLYZED WITH THE MOISTURE IN THE ATMOSPHERE, AND THE MOISTURE IN AIR AND A -SICI3 GROUP DEHYDROCHLORINATED TO FORM A MICROCRYSTALLINE POLYMER (33) ON THE FIN (31). AS A RESULT, A COATING FILM HAVING A SURFACE ROUGHNESS IN THE RANGE OF 1 TO 40 mM AND A CONTACT ANGLE OF ABOUT 171O TO WATER CAN BE FORMED. (FIG. 2)