Spray-in latex foam for sealing and insulating

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 133/00 (2006.01)

Patent

CA 2670807

A spray latex foam for filling wall cavities to enhance the sealing and insulating properties of a building is provided. The spray latex foam includes a latex system and a gaseous coagulating component. In at least one exemplary embodiment, carbon dioxide is included as a gaseous coagulating agent. One latex suitable for use in the spray foam is polyvinylidene chloride (PVDC), which possesses fire retardancy and environmental durability. However, a preferred latex is styrene-butadiene rubber (SBR). The latex system may also include a thixotropic agent, such as Laponite® RD synthetic clay. The spray latex foam is polyurethane-free. A method of preparing a spray latex foam that includes supplying a latex system and adding a gaseous coagulating component to the latex system is also provided.

La présente invention concerne une mousse de latex pulvérisable destinée à combler les cavités dans les murs afin d'améliorer les propriétés d'un bâtiment en matière de colmatage et d'isolation. La mousse de latex pulvérisable comprend un système à base de latex et un agent coagulant gazeux. Dans au moins un exemple de mode de réalisation, du dioxyde de carbone est incorporé en tant qu'agent coagulant gazeux. Un latex utilisable dans la mousse pulvérisable est constitué par le chlorure de polyvinylidène (PVDC), qui est un agent retardateur de flamme et qui présente une bonne durabilité environnementale. Toutefois, un latex préféré est le caoutchouc de styrène-butadiène (SBR). Le système à base de latex peut également comporter un agent thixotropique, comme l'argile de synthèse Laponite® RD. Cette mousse de latex pulvérisable ne contient pas de polyuréthane. La présente invention concerne également un procédé de préparation d'une mousse de latex pulvérisable comprenant la mise à disposition d'un système à base de latex et l'addition d'un agent coagulant gazeux au système à base de latex.

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