Process of producing azo compounds by heating diazo compositions comprising precursory couplers activable by heat

Claim 1

THE METHOD WHICH COMPRISES HEATING TO A DECARBOXYLATING TEMPERATURE A NORMALLY STABLE ACIDIC COMPOSITION HAVING AN INTIMATE CONTACT AS A STARTING MATERIAL A DIAZONIUM COMPOUND AND AN AROMATIC COUPLER PRECURSOR THEREFOR WHICH CONTAINS A CARBOXYLIC ACID GROUP SUBJECT TO DECARBOXYLATION WHEN HEATED, SAID PRECURSOR BEING NORMALLY STABLE IN SAID COMPOSITION AND INCAPABLE OF COUPLING WITH SAID DIAZONIUM COMPOUND IN SAID COMPOSITION, SAID PRECURSOR BEING SUBJECT WHEN HEATED IN THE PRESENCE OF SAID DIAZONIUM COMPOUND TO DECOMPOSE AND FORM A TRANSITORY MATERIAL WHICH SIMULTANEOUSLY COUPLES WITH SAID DIAZONIUM COMPOUND AT THE SITE OF DECARBOXYLATION.

Claim 2

THE METHOD WHICH COMPRISES HEATING TO A DECARBOXYLATING TEMPERATURE A NORMALLY STABLE ACIDIC COMPOSITION HAVING AN INTIMATE CONTACT AS A STARTING MATERIAL A DIAZONIUM COMPOUND AND AN AROMATIC COUPLER PRECURSOR THEREFOR WHICH CONTAINS A CARBOXYLIC ACID GROUP SUBJECT TO DECARBOXYLATION WHEN HEATED, SAID PRECURSOR BEING NORMALLY STABLE IN SAID COMPOSITION AND INCAPABLE OF COUPLING WITH SAID DIAZONIUM COMPOUND IN SAID COMPOSITION, SAID PRECURSOR BEING SUBJECT WHEN HEATED IN THE PRESENCE OF SAID DIAZONIUM COMPOUND TO DECOMPOSE AND FORM A TRANSITORY MATERIAL WHICH SIMULTANEOUSLY COUPLES WITH SAID DIAZONIUM COMPOUND AT THE SITE OF DECARBOXYLATION.

Claim 3

THE METHOD WHICH COMPRISES FORMING ON A CARRIER BASE A NORMALLY STABLE ACIDIC COMPOSITION HAVING IN INTIMATE CONTACT AS A STARTING MATERIAL A DIAZONIUM COMPOUND AND A DECARBOXYLATABLE AROMATIC COUPLER PRECURSOR HAVING A CARBOXYLIC ACID GROUP WHICH PRECURSOR IS INCAPABLE OF COUPLING IN SAID COMPOSITION WITH SAID DIAZONIUM COMPOUND, AND HEATING SAID COMPOSITION TO A DECARBOXYLATING TEMPERATURE, WHEREBY TO DECARBOXYLATE SAID CARBOXYLIC ACID GROUP IN THE PRESENCE OF SAID DIAZONIUM COMPOUND AND THEREBY EFFECTING DYE-FORMING COUPLING OF SAID DIAZONIUM COMPOUND WITH A TRANSISTORY MATERIAL RESULTING FROM DECARBOXYLATION OF SAID COUPLER PRECURSOR AT THE SITE OF DECARBOXYLATION.

Claim 4

THE METHOD WHICH COMPRISES FORMING ON A CARRIER BASE A NORMALLY STABLE ACIDIC COMPOSITION HAVING IN INTIMATE CONTACT AS A STARTING MATERIAL A DIAZONIUM COMPOUND AND A DECARBOXYLATABLE AROMATIC COUPLER PRECURSOR HAVING A CARBOXYLIC ACID GROUP WHICH PRECURSOR IS INCAPABLE OF COUPLING IN SAID COMPOSITION WITH SAID DIAZONIUM COMPOUND, AND HEATING SAID COMPOSITION TO A DECARBOXYLATING TEMPERATURE, WHEREBY TO DECARBOXYLATE SAID CARBOXYLIC ACID GROUP IN THE PRESENCE OF SAID DIAZONIUM COMPOUND AND THEREBY EFFECTING DYE-FORMING COUPLING OF SAID DIAZONIUM COMPOUND WITH A TRANSISTORY MATERIAL RESULTING FROM DECARBOXYLATION OF SAID COUPLER PRECURSOR AT THE SITE OF DECARBOXYLATION.