Velsicol Chemical Corporation

Glendon D Kyker

Sidney B Richter

Kalidas Paul

There is disclosed a process for the production of hexachlorocyclopentadiene comprising the steps of: 1. Reacting liquid cyclopentadiene and chlorine at a temperature of from about 0.degree. to about 100.degree. C. until an average of at least 4 chlorine atoms has been added per mole of cyclopentadiene to form a first-stage product; 2. heating the resultant liquid reaction product of Step 1 in a second stage at a temperature of from about 140.degree. C. to below about 200.degree. C. with chlorine in the presence of from about 0.0001% to about 5.0% (by weight) of an aromatic compound until the reaction products of Step 1 contain an average of about 6 chlorine atoms per molecule, based on cyclopentadiene starting material; wherein said aromatic compound contains from 1 to 3 aromatic rings; at least one of the rings containing a nitrogen atom; 3. vaporizing and heating the resulting reaction products of Step 2 in a third stage in the presence of chlorine to a temperature of above 450.degree. C. until at least a major portion of said products are converted to hexachlorocyclopentadiene.

Process for preparing hexachlorocyclopentadiene

There is disclosed a process for the production of hexachlorocyclopentadiene comprising the steps of:

This invention discloses chemical compounds of the formula ##STR1## wherein X is chlorine or bromine and each of Y.sup.1, Y.sup.2, Y.sup.3 and Y.sup.4 are hydrogen, chlorine or bromine. Further disclosed are combustible polymers which have incorporated therein a fire retardant amount of a compound of the foregoing description.

Bis-(tetrahalophthalimidocarbonyl)-benzene

This invention discloses chemical compounds of the formula ##SPC1## Wherein X is chlorine or bromine, and n is an integer from 2 to 5; and fire retardant compositions prepared therefrom.

Bis-(halophenyl) 2,3,5,6-tetrachloro-terephthalate and fire retardant

This invention discloses chemical compounds of the formula ##SPC1## Wherein X and Y are each chlorine or bromine and n is an integer from 2 to 5. Further disclosed are fire retardant compositions comprising a combustible polymer and a compound of the foregoing description.

N-(Halobenzoyl) hexahalo-3,5-methanotetrahydrophthalimides

This invention discloses chemical compounds of the formula ##SPC1## Wherein Y is chlorine or bromine and n is an integer from 2 to 5. Further disclosed are fire retardant compositions comprising a combustible polymer and a compound of the foregoing description.

N-(halobenzoyl)-4,5-dibromo-3,6-methanohexahydrophthalimides

N-(halobenzoyl)-3,4-dibromohexahydrophthalimides

This invention discloses fire retardant chemical compounds of the formula ##SPC1## Wherein X and Y are each chlorine or bromine and n is an integer from 2 to 5 which are useful in polymeric compositions.

Growing community of inventors

Glen Ellyn, IL, United States of America

Glendon D Kyker