The combined use of phosphorus flame retardant with smoke suppression agents, as well as reactive silicone, in flexible polyurethane foams was studied. Cone results of the obtained flexible foams strongly support �synergism�. With 25 pbw of phosphorus FR, Antiblaze� 230, and 10pbw of zinc stannate in the PUR formulation, the peak heat release rate was reduced by as much as 52%. Furthermore, the combined use of phosphorus FR with reactive silicone in flexible PUR foams also exhibited significant reduction in PHRR. The addition of Antiblaze� 230 increases smoke production of PUR foams, but the combined use of ZS or ZHS with Antiblaze� 230, as well as reactive silicone with Antiblaze� 230, significantly reduces smoke generation. It is also found that RDP with low volatility and high heat stability characteristics leads to the absence of gas phase inhibition, and has no flame retardant effect when used in PUR foams.

Exploring halogen free flame retardant flexible polyurethane foams via a combined effect of flame retardants

243rd National Meeting (2012)

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