| 摘要 |
<p>A waterproof elastic coating composition, and coated substrates, having a dried coating of such composition, is disclosed, wherein the coating is polymer rich, has a pigment volume concentration no greater than 10, an ultimate elongation of at least 250% when measured in the form of a film 7 mils thick and at 90% RH and 78.degree.F, a visco-elastic flow such as to permit a 7 mils thick film which is firmly adhered to a surface to withstand, even over extended periods of time, and without loss of its waterproofing properties, the development of a crack of up to 1 mm. in width in said surface, and a dry and wet adhesion to maintain the film adhesion to said substrate under normal atmospheric conditions. Coatings produced from the composition of the present invention waterproof roofs and walls when applied thereto, to form coatings which are extremely durable and long lasting, and which are quite economical in comparison to the waterproofing coatings of the prior art.</p> |
