Slurry and acoustical panel with reduced bound water

C - Chemistry – Metallurgy – 09 – C

Patent

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Details

C09C 3/10 (2006.01) C08K 9/04 (2006.01) C08L 25/08 (2006.01) C08L 27/04 (2006.01) C08L 31/04 (2006.01) C08L 33/00 (2006.01) C09C 1/28 (2006.01) E04B 1/82 (2006.01) E04B 9/04 (2006.01) E04C 2/284 (2006.01)

Patent

CA 2691536

A composition for a slurry for manufacture of a building panel includes one or more fillers, one or more binders and water. One or more fillers is an expanded perlite at least partially covered with a film-forming, thermoplastic polymer coating Some embodiments use calcined or uncalcined gypsum as a binder or filler. One embodiment is a building panel that includes a solid matrix of calcium sulfate dihydrate crystals bound to expanded perlite. A method of making the panel includes acquiring expanded perlite and coating it with film-forming, thermoplastic polymer coating. After the expanded perlite is prepared, it is combined with water other optional fillers and one or more binders to form a slurry. The slurry is shaped into a panel and allowed to dry.

L'invention concerne une composition pour une suspension pour la fabrication d'un panneau de construction comprenant une ou plusieurs charges, un ou plusieurs liants et de l'eau. Une ou plusieurs charges sont de la perlite expansée, recouverte au moins partiellement d'un revêtement polymère thermoplastique filmogène. Certains modes de réalisation utilisent du plâtre calciné ou non calciné en tant que liant ou charge. Un mode de réalisation est un panneau de construction qui comprend une matrice solide de cristaux de dihydrate de sulfate de calcium liée à de la perlite expansée. Un procédé de fabrication du panneau comprend l'acquisition de perlite expansée et le recouvrement de celle-ci avec un revêtement polymère thermoplastique filmogène. Après que la perlite expansée a été préparée, elle est combinée avec de l'eau et d'autres charges facultatives et un ou plusieurs liants pour former une suspension. La pâte est mise en forme en un panneau, et est autorisée à sécher.

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