Cyano-ether polysiloxane-polyoxyalkylene copolymers

Details Cyano-ether polysiloxane-polyoxyalkylene copolymers Cyano-ether polysiloxane-polyoxyalkylene copolymers

1974-12-27

1976-09-07

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 25AH, 2604482N, C07F 710, C07F 718

Patent

active

039794202

ABSTRACT:
Organosilicone compositions are provided which comprise polysiloxane-polyoxyalkylene copolymers containing monofunctional siloxy units (M.sub.o) and, for every two moles of M.sub.o, an average of between about 10 and about 200 difunctional dialkylsiloxy units, an average of between about 2 and about 100 silicon-bonded cyano-bearing ether groups (Q) having the formula, -(O).sub.q R'OR"CN, wherein q is zero or one, 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 (E), the polyoxyalkylene content of said copolymers being constituted of between about 20 and about 65 weight percent of oxyethylene units, said M.sub.o units having at least two alkyls bonded to the respective silicon atoms thereof, the remaining organic group of M.sub.o being alkyl, Q or E, said copolymers also containing difunctional monoalkylsiloxy units the remaining organic group bonded to the respective silicon atoms thereof being Q or E. The polymers of the invention are effective stabilizers of flexible polyether polyol-based polyurethane foam and offer particular advantage in the formation of flame-retarded foam.

REFERENCES:
patent: 2872435 (1959-02-01), Speier
patent: 3168544 (1965-02-01), Jex
patent: 3185663 (1965-05-01), Prober
patent: 3185719 (1965-05-01), Prober
patent: 3544615 (1970-12-01), Poppelsdorf
patent: 3560549 (1971-02-01), Poppelsdorf
patent: 3629309 (1971-12-01), Bailey et al.

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