Henry G Braxton

US Patent:

50063243, Apr 9, 1991

Filed:

Jan 10, 1984

Appl. No.:

6/569611

Inventors:

Charles H. Kolich - Baton Rouge LA
Bernard R. Meltsner - Royal Oak MI
Henry G. Braxton - Baton Rouge LA

Assignee:

Ethyl Corporation - Richmond VA

International Classification:

C01B 2510

US Classification:

423300

Abstract:

High molecular weight phosphonitrillic chloride polymers that are soluble in benzene, toluene and tetrahydrofuran, tetrameric phosphonitrilic chloride, or mixtures thereof at elevated temperatures in the presence of a catalytic amount of an aprotic Lewis acid halogen acceptor. For example, soluble high molecular weight phosphonitrillic chloride can be made by heating the aforementioned trimer at 220. degree. -270. degree. C. in the presence of 5-1000 ppm of AlCl. sub. 3.

US Patent:

39963128, Dec 7, 1976

Filed:

Nov 21, 1974

Appl. No.:

5/525932

Inventors:

Charles H. Kolich - Northville MI
Henry G. Braxton - Franklin MI
Urho A. Lehikoinen - Detroit MI

Assignee:

Ethyl Corporation - Richmond VA

International Classification:

C07C 906
C08K 553

US Classification:

260927N

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).

US Patent:

40269647, May 31, 1977

Filed:

Sep 15, 1976

Appl. No.:

5/723552

Inventors:

Charles H. Kolich - Northville MI
Henry G. Braxton - Franklin MI
Urho A. Lehikoinen - Detroit MI

Assignee:

Ethyl Corporation - Richmond VA

International Classification:

C07D 906
C08K 553
C08L 3106

US Classification:

260860

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).

US Patent:

45145776, Apr 30, 1985

Filed:

Oct 15, 1982

Appl. No.:

6/434827

Inventors:

Allen H. Filbey - Baton Rouge LA
Henry G. Braxton - Baton Rouge LA
Bernard R. Meltsner - Royal Oak MI

Assignee:

Ethyl Corporation - Richmond VA

International Classification:

C07C 3914
C07C 3716

US Classification:

568744

Abstract:

Phenols having an unsubstituted ortho-position are benzylated by reaction with a benzyl alcohol in contact with an activated alumina catalyst especially gamma alumina at a temperature sufficient to maintain the reactants in the vapor phase.