| 摘要 |
<p>Provided is a surface-protective water-repellent agent which is intended to be applied to the exterior coated surface of a passenger car or the like. The coating layer formed from the surface-protective water-repellent agent can be easily finished by wiping after the application. Even when the surface-protective water-repellent agent is applied in a small amount, the resulting coating exhibits excellent initial water repellency. Further, the surface-protective water-repellent agent exhibits excellent antifouling properties, weather resistance, particularly, excellent non-glaringness in washing and excellent durability in terms of washing. A surface-protective water-repellent agent for exterior surfaces, which comprises 100 parts by mass of (A) a moisture-curable liquid silicone oligomer, 0.1 to 40 parts by mass of (B) a curing catalyst for (A), 1 to less than 100 parts by mass of (C) a linear modified polydimethylsiloxane having silanol groups at both terminals, and 0.1 to 25 parts by mass of (D) hydrophobic fine particles having a mean particle diameter of 1 to 50nm, which further contains one or more solvents selected from among silicone-based volatile solvents, hydrocarbon-based volatile solvents, and polar-group-containing volatile solvents, and which additionally contains (E) a volatile solvent in an amount of at most 500 parts by mass per part by mass of the sum total of the components (A), (B), (C) and (D), said volatile solvent (E) being a volatile solvent in which the components (A), (B), (C) and (D) can be dissolved or dispersed.</p> |
