Thoughened phenolic foam

Details Thoughened phenolic foam Thoughened phenolic foam

C - Chemistry, Metallurgy

08

L

C08L 61/06 (2006.01) C08J 9/228 (2006.01) C08L 39/06 (2006.01)

Patent

CA 2591626

A phenolic closed-cell foam includes polyvinyl pyrrolidone with a molecular weight of from 5,000 to 80,000 as a toughening agent. The polyvinyl pyrrolidone is present in the mixture (excluding blowing agent) in an amount of from 4% to 20% by weight. The foam cells are substantially free of holes or surface defects. The foam has superior fire performance.

La mousse phénolique à cellules fermées selon l~invention comprend une polyvinylpyrrolidone avec une masse moléculaire de 5000 à 80 000 en tant que renforçateur. La polyvinylpyrrolidone est présente dans le mélange (à l'exclusion de l'agent d~expansion) en une quantité de 4 % à 20 % en poids. Les cellules de la mousse sont sensiblement dépourvues de trous ou de défauts de surface. La mousse a une performance ignifuge supérieure.

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