Polyester urethane foam produced with cyano-ether polysiloxane-p

Details Polyester urethane foam produced with cyano-ether polysiloxane-p Polyester urethane foam produced with cyano-ether polysiloxane-p

1976-05-28

1977-11-15

Ivy, C. Warren

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252351, 252356, C08G 1842, C08K 554

Patent

active

040584933

ABSTRACT:
Organosilicone compositions are provided which comprise polysiloxane-polyoxyalkylene copolymers containing monofunctional siloxy units and difunctional siloxy units, an average of between about 2 and about 20 silicon-bonded cyano-bearing ether groups for every two moles of monofunctional units, said cyano-bearing ether groups having the formula, --(O).sub.q R'OR"CN, wherein q is 0 or 1, R' is bivalent alkylene of 3 to 8 carbon atoms and R" is bivalent alkylene of 2 to 4 carbon atoms, and an average of between about 2 and about 30 silicon-bonded, organic-capped polyoxyalkylene blocks for every two moles of monofunctional units, at least 75 weight percent of the polyoxyalkylene content of said copolymers being constituted of oxyethylene units, said monofunctional units having at least two alkyls bonded to the respective silicon atoms thereof and the difunctional units having at least one alkyl bonded to the respective silicon atoms thereof, the remaining organic group bonded to silicon of the respective monofunctional and difunctional siloxy units being alkyl, said cyano-bearing ether group or said polyoxyalkylene block. The polymers of the invention are effective stabilizers of flexible polyester polyol-based polyurethane foam and offer particular advantage in the formation of flame-retarded foam.

REFERENCES:
patent: 3833512 (1974-09-01), Prokai
patent: 3954824 (1976-05-01), Prokai
patent: 3979419 (1976-09-01), Prokai

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