Finish material composition having hydrophobicity, article, method for producing matting top cemented board and cementitious board

摘要

Disclosed are hydrophobic finish compositions and cementitious articles made using the hydrophobic finish compositions. In some embodiments, the article is a waterproof gypsum panel reinforced with inorganic mineral fibers facing a flexible and hydrophobic cementitious finish with advantageous waterproof properties. This waterproof gypsum panel is used in many applications such as tile foundation boards in wet or dry areas of buildings, exterior weather barrier panels for use as exterior sieving, interior walls and ceilings, and roof cover boards Has durability to water and low surface absorption. Flexible and hydrophobic cementitious finishes include fly ash, film-forming polymers, preferably silane compounds (eg, alkylalkoxysilanes), one or more carboxylic acids, carboxylates, or their Long flow time maintenance agents including any of the mixtures and other optional additives can be included. It is preferable to use a precoated glass fiber nonwoven mat to form inorganic mineral fibers for surface reinforcement. [Selection] Fig. 19 (a)