| 摘要 |
A fluid roof coating which is applied to a building. The coating is an aqueous air-drying composition preferably comprising, as a suspension: (a) a first polymer emulsion having a low enough Tg that it will not crystallize at subfreezing temperatures; (b) a second polymer emulsion which is harder than said first polymer emulsion, dries to a higher gloss finish than said first emulsion polymer, and has a Tg such that the resulting mixture will maintain a low enough Tg that it will not crystallize at subfreezing temperatures; and (c) non-polymeric solids including a pigment; wherein the composition contains at least 25% polymeric solids, no more than 35% non-polymeric solids, and a total solid content of 50% of percentage based on the weight of the composition. The composition when air-dried has a Shore hardness of at least 20, a tensile strength of at least 100 psi, and an elongation of at least 100% when measured at room temperature.
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