C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
403/37
C08G 18/28 (2006.01) C08G 18/38 (2006.01) C08K 5/51 (2006.01)
Patent
CA 1141899
Abstract This invention is directed to a process for producing flame retardant flexible polyurethane foams having a porosity in the range of between 0.5 and 10 cubic feet per minute. A polyol have an average molecular weight between about 250 and about 6,500 is reacted with toluene diisocyanate which comprises a mixture of the isomers of 2,4- and 2,6- toluene diisocyanate. The concentration of 2,4- toluene diisocyanate isomer is not critical. The formulation of the present invention includes a flame retardant mixture of plasticizer and dibromoneopentyl glycol. The plasticizer is either a halogenated phospho- nate or halogenated phosphate ester. Chlorine is the preferred halogen atom. The weight ratio of those ingre- dients is between about 50/50 and about 90/10 with the ratio 85/15 preferred. The concentration of that mixture is from about 1 to about 20 percent by weight of the polyol. Other ingredients that can be included in this formulation are water, a silicone surfactant, a tertiary amine catalyst, a tertiary amine co-catalyst, an auxiliary blowing agent and a tine catalyst. This process results in foam products that are flame retardant and suitable for automotive and furniture applications.
348803
Osler Hoskin & Harcourt Llp
Reeves Brothers Inc.
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