Process of making naphthoquinone diazide esters using lactone so

Details Process of making naphthoquinone diazide esters using lactone so Process of making naphthoquinone diazide esters using lactone so

1990-11-28

1994-04-05

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Composition or product which contains radiation sensitive...

430193, G03F 7022

Patent

active

053003969

ABSTRACT:
A method of preparing a photosensitizer condensate comprising: condensing a phenolic compound with a diazo sulfonyl chloride, wherein from about 50 to 100 mole percent of the diazo moiety is 2,1,4-diazo and from 0 to about 50 mole percent of the diazo moiety is 2,1,5 diazo; the phenolic compound having, on average, from about 60 mole percent to about 100 mole percent of its hydroxy groups esterified by the diazo sulfonyl chloride; wherein the condensing is conducted in a lactone solvent in the presence of an acid scavenger; and then subsequently isolating the photosensitizer condensate.

REFERENCES:
patent: 4929536 (1990-05-01), Spak et al.
patent: 4957846 (1990-09-01), Jeffries et al.
patent: 5080997 (1992-01-01), Hioki et al.

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