Agentes espumantes para agua dura y métodos para la producción de placas de yeso

• Main Authors: WANG, XUMING, SUCECH, STEVEN W
• Format: Patent
• Language: Spanish
• Published: 27.05.2015
• Subjects: ADHESIVES; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DYES; LIME, MAGNESIA; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; REFRACTORIES; SLAG; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF NATURAL STONE

Un lodo de yeso que comprende yeso calcinado, agua dura que tiene un mínimo de aproximadamente 80 mg/L de calcio y espuma generada a partir de un alquil extoxi sulfato que incluye una parte hidrofílica que incluye aproximadamente de 0,2 a aproximadamente 3,0 grupos etoxi y una parte hidrofóbica que incluye una distribución de longitudes de cadena alquilo que incluye de aproximadamente un 20% a aproximadamente un 60% de cadenas C8; de aproximadamente un 20% a aproximadamente un 60% de cadenas C10; de aproximadamente un 14% a aproximadamente un 36% de cadenas C12 y de aproximadamente un 2% a aproximadamente un 20% de cadenas C14. Compositions and methods for reducing the impact of hard water on gypsum board foaming are provided. The compositions include adding a foam to water and a calcined slurry. The foam includes water, dispersed air and a surfactant. Surfactants for use include a hydrophobic portion having an alkyl chain length distribution of about 20% to about 60% C8 chains; about 20% to about 60% C10 chains; about 14% to about 36% C12 chains and about 2% to about 20% C14 chains and also having a hydrophilic portion having about 0.2 to 3.0 ethoxy groups.