Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-09-15
1977-05-31
Tillman, Murray
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260 457P, 260 4575P, 260 458NE, 260 4585T, 260 459NP, 260 4595D, 260861, 260862, 260864, 260865, 260866, C07D 906, C08K 553, C08L 3106
Patent
active
040269647
ABSTRACT:
The fire retardancy of polyesters is enhanced with halophenoxyphosphazenes that contain a P--O--P bond. Preferred materials are reaction products of a halogenated phenol and a phosphonitrilic halide. Brominated phenols are preferred although chlorophenols can be used. Of the brominated phenols, preferred starting materials are p-bromophenol, 2,4-dibromophenol and mixtures thereof. Phosphonitrilic chlorides are preferred starting materials. Pure phosphonitrilic halides can be used; however, phosphonitrilic halide mixtures are preferred because of their availability. Cyclic and linear phosphonitrilic halides are useful as well as mixtures thereof. Saturated and unsaturated polyesters can be made fire retardant by this invention, as can thermoplastic and thermosetting materials. Linear and crosslinked polyesters can be treated. Preferred polyesters are fiber-forming polyesters of a diol and dibasic acid, such as poly(ethylene terephthalate) and poly(1,4-cyclohexylenedimethyleneterephthalate).
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Braxton, Jr. Henry G.
Kolich Charles H.
Lehikoinen Urho A.
De Benedictis, Sr. T.
Ethyl Corporation
Johnson Donald L.
Linn Robert A.
Sieberth John F.
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