US4157425A — Catalytic process for the preparation of phosphaz…

Claim 1

Independent Claim 309 words

A process for producing a phosphazene polymer foam which comprises: (a) thermally polymerizing a cyclic compound of the formula (NPCl 2 ) y wherein y is 3, 4, or mixtures thereof with a catalytically sufficient amount of a compound having the formula M(OR') x , wherein M is an alkali metal or an alkaline earth metal, x is equal to the valence of the metal M, and R' is C 1 to C 10 linear or branched alkyl, C 1 to C 10 substituted linear or branched alkyl, the substituent selected from the group consisting of nitro, C 1 to C 10 alkyl, C 1 to C 10 alkoxy, C 6 to C 10 aryl and C 6 to C 10 aryloxy radicals to form a phosphazene polymer; (b) contacting the resulting phosphazene polymer with a metal compound having the formula M(OC.sub.6 H.sub.4 R.sub.1).sub.x, M(OC.sub.6 H.sub.4 R.sub.2).sub.x, or mixtures thereof wherein M is an alkali metal or alkaline earth metal, x is equal to the valence of said metal M, and R 1 and R 2 are the same or different and are selected from the group consisting of C 1 to C 10 alkyl radical, C 6 to C 10 aryl radical, C 1 to C 10 substituted C 1 to C 10 alkyl radical and substituted C 6 to C 10 aryl radical, the substituent selected from the group consisting of halogen, nitro, cyano, C 1 to C 4 alkyl, C 1 to C 4 alkoxy, C 6 to C 10 aryl and C 6 to C 10 aryloxy radicals, thereby forming a phosphazene polymer which is substantially free of halogen; and (c) mixing the resulting phosphazene polymer which is substantially free of halogen with a chemical blowing agent and heating the resulting mixture to a temperature sufficient to decompose said blowing agent and form a foam.

Claim 2

Dependent Claim 309 words

A process for producing a phosphazene polymer foam which comprises: (a) thermally polymerizing a cyclic compound of the formula (NPCl 2 ) y wherein y is 3, 4, or mixtures thereof with a catalytically sufficient amount of a compound having the formula M(OR') x , wherein M is an alkali metal or an alkaline earth metal, x is equal to the valence of the metal M, and R' is C 1 to C 10 linear or branched alkyl, C 1 to C 10 substituted linear or branched alkyl, the substituent selected from the group consisting of nitro, C 1 to C 10 alkyl, C 1 to C 10 alkoxy, C 6 to C 10 aryl and C 6 to C 10 aryloxy radicals to form a phosphazene polymer; (b) contacting the resulting phosphazene polymer with a metal compound having the formula M(OC.sub.6 H.sub.4 R.sub.1).sub.x, M(OC.sub.6 H.sub.4 R.sub.2).sub.x, or mixtures thereof wherein M is an alkali metal or alkaline earth metal, x is equal to the valence of said metal M, and R 1 and R 2 are the same or different and are selected from the group consisting of C 1 to C 10 alkyl radical, C 6 to C 10 aryl radical, C 1 to C 10 substituted C 1 to C 10 alkyl radical and substituted C 6 to C 10 aryl radical, the substituent selected from the group consisting of halogen, nitro, cyano, C 1 to C 4 alkyl, C 1 to C 4 alkoxy, C 6 to C 10 aryl and C 6 to C 10 aryloxy radicals, thereby forming a phosphazene polymer which is substantially free of halogen; and (c) mixing the resulting phosphazene polymer which is substantially free of halogen with a chemical blowing agent and heating the resulting mixture to a temperature sufficient to decompose said blowing agent and form a foam.

Claim 3

Dependent Claim 13 words

The process in accordance with claim 1 wherein said blowing agent is 1,1'-bisazoformamide.

Claim 4

Dependent Claim 114 words

The process in accordance with claim 1 wherein said phosphazene polymer, substantially free of halogen is mixed with a chemical blowing agent and a mixture of curing agents, at least one of said curing agents having an initiation temperature below the temperature at which said chemical blowing agent decomposes; heating the foamable mass to a temperature below the decomposition temperature of said blowing agent, but above the initiation temperature of at least one of said curing agents, for a sufficient time to partially precure the copolymers; and heating the partially precured mass to a temperature above the decomposition temperature of said blowing agent to foam the copolymers and to effect a further cure thereof.

Claim 5

Dependent Claim 68 words

The process of claim 3, wherein the partial precure is accomplished by heating the foamable mass for about 6 to about 30 minutes at a temperature of from about 200° F. to about 250° F., and the foaming and further curing is accomplished by heating the partially precured mass for about 30 to about 60 minutes at a temperature of from about 300° F. to about 350° F.

Claim 6

Dependent Claim 289 words

A process for producing a phosphazene polymer foam which comprises: (a) thermally polymerizing a cyclic compound of the formula (NPCl 2 ) y where y is 3, 4, or mixtures thereof with a catalytically sufficient amount of a compound having the formula N 3 P 3 Cl z (OR') 6-z wherein R' is C 1 to C 10 linear or branched alkyl, C 1 to C 10 substituted linear or branched alkyl, the substituent selected from the group consisting of halogen, nitro, C 1 to C 10 alkyl, C 1 to C 10 alkoxy, C 6 to C 10 aryl and C 6 to C 10 aryloxy radicals and z equals 0 to 5. (b) contacting the resulting phosphazene polymer with a metal compound having the formula M(OC.sub.6 H.sub.4 R.sub.1).sub.x, M(OC.sub.6 H.sub.4 R.sub.2).sub.x, or mixtures thereof wherein M is an alkali metal or an alkaline earth metal, x is equal to the valence of said metal M, and R 1 and R 2 are the same or different and are selected from the group consisting of C 1 to C 10 alkyl radical, C 6 to C 10 aryl radical, substituted C 1 to C 10 alkyl radical and substituted C 6 to C 10 aryl radical, the substituent selected from the group consisting of halogen, nitro, cyano, C 1 to C 4 alkyl, C 1 to C 4 alkoxy, C 6 to C 10 aryl and C 6 to C 10 aryloxy radicals, thereby forming a phosphazene polymer substantially free of halogen; and (c) mixing the resulting phosphazene polymer which is substantially free of halogen with a chemical blowing agent and heating the resulting mixture to a temperature sufficient to decompose said blowing agent and form a foam.

Claim 7

Dependent Claim 289 words

A process for producing a phosphazene polymer foam which comprises: (a) thermally polymerizing a cyclic compound of the formula (NPCl 2 ) y where y is 3, 4, or mixtures thereof with a catalytically sufficient amount of a compound having the formula N 3 P 3 Cl z (OR') 6-z wherein R' is C 1 to C 10 linear or branched alkyl, C 1 to C 10 substituted linear or branched alkyl, the substituent selected from the group consisting of halogen, nitro, C 1 to C 10 alkyl, C 1 to C 10 alkoxy, C 6 to C 10 aryl and C 6 to C 10 aryloxy radicals and z equals 0 to 5. (b) contacting the resulting phosphazene polymer with a metal compound having the formula M(OC.sub.6 H.sub.4 R.sub.1).sub.x, M(OC.sub.6 H.sub.4 R.sub.2).sub.x, or mixtures thereof wherein M is an alkali metal or an alkaline earth metal, x is equal to the valence of said metal M, and R 1 and R 2 are the same or different and are selected from the group consisting of C 1 to C 10 alkyl radical, C 6 to C 10 aryl radical, substituted C 1 to C 10 alkyl radical and substituted C 6 to C 10 aryl radical, the substituent selected from the group consisting of halogen, nitro, cyano, C 1 to C 4 alkyl, C 1 to C 4 alkoxy, C 6 to C 10 aryl and C 6 to C 10 aryloxy radicals, thereby forming a phosphazene polymer substantially free of halogen; and (c) mixing the resulting phosphazene polymer which is substantially free of halogen with a chemical blowing agent and heating the resulting mixture to a temperature sufficient to decompose said blowing agent and form a foam.

Claim 8

Dependent Claim 13 words

The process in accordance with claim 5 wherein said blowing agent is 1,1'-azobisformamide.

Claim 9

Dependent Claim 114 words

The process in accordance with claim 5 wherein said phosphazene polymer, substantially free of halogen is mixed with a chemical blowing agent and a mixture of curing agents, at least one of said curing agents having an initiation temperature below the temperature at which said chemical blowing agent decomposes; heating the foamable mass to a temperature below the decomposition temperature of said blowing agent, but above the initiation temperature of at least one of said curing agents, for a sufficient time to partially precure the copolymers; and heating the partially precured mass to a temperature above the decomposition temperature of said blowing agent to foam the copolymers and to effect a further cure thereof.

Claim 10

Dependent Claim 68 words

The process of claim 6 wherein the partial precure is accomplished by heating the foamable mass for about 6 to about 30 minutes at a temperature of from about 200° F. to about 250° F., and the foaming and further curing is accomplished by heating the partially precured mass for about 30 to about 60 minutes at a temperature of from about 300° F. to about 350° F.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1982-06-04	1982-12-04	1983-06-05	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1986-06-04	1986-12-04	1987-06-05	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1990-06-04	1990-12-04	1991-06-05	$7700.00	Window Closed / Lapsed

Catalytic process for the preparation of phosphazene polymers

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag