Organosilicone polymers and polyester urethane foam produced the

Details Organosilicone polymers and polyester urethane foam produced the Organosilicone polymers and polyester urethane foam produced the

1974-04-03

1976-05-04

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604482N, 260 25AH, 252182, 260 465R, 260 465E, 260 465Y, C07F 708, C07F 710, C07F 718

Patent

active

039548244

ABSTRACT:
Organosilicone polymers are provided containing monofunctional units (R).sub.3 SiO.sub.1/2 and reoccurring difunctional units (R)(Q)SiO.sub.2/2 and (R)(E)SiO.sub.2/2, as essentially the sole types of units or in combination with reoccurring difunctional dialkylsiloxy units, R.sub.2 SiO.sub.2/2, where R of said units is alkyl, Q is --O--R.degree.--CN or --R.degree.--CN, R.degree. being bivalent alkylene, and E is a polyoxyalkylene block, at least 75 weight percent of the oxyalkylene content of the polymers being constituted of oxyethylene and the mole ratio of the (R).sub.3 SiO.sub.1/2 :(R).sub.2 SiO.sub.2/2 : (R)(Q)SiO.sub.2/2 :(R)(E)SiO.sub.2/2 units being about 2:0-20:2-20:2-30, provided the combined weight of said units is constituted, on the average, of from about 50 to about 85 weight percent of said polyoxyalkylene blocks (E). The polymers of the invention are effective stabilizers of flexible polyester polyol-based polyurethane foams and offer particular advantage in the formation of flame-retarded foams. Also described is a particular class of cyano-substituted polyalkylsiloxane hydrides which are useful in the preparation of the aforesaid polymers.

REFERENCES:
patent: 2872435 (1959-02-01), Speier
patent: 3026278 (1962-03-01), Walton et al.
patent: 3185663 (1965-05-01), Prober

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