Gaf Chemicals Corporation

Isp Investments Inc.

Robert D Schenfele

David F Lewis

Thomas Winkler

Carl A Listl

Mark L Moskowitz

Anthony Pilato

This invention relates to a process for the recovery of a substantially insoluble, radiation imageable polyacetylene dispersion in aqueous binder which comprises contacting the dispersion with a proteolylic enzyme in an amount sufficient to decompose the binder, at a pH of from about 3 to about 9 and a temperature of between about 20.degree. C. and about 70.degree. C. and separating polyacetylene solids from the resulting liquid mixture, and which solids can be solubilized and recrystallized for further use.

Recovery of imageable polyacetylenes from binder containing aqueous

A multi-ply radiation dosage indicator, and method of manufacture, is disclosed including a first ply having visible indicia thereon and a second ply having a radiation sensitive zone overlying the indicia of the first ply. The radiation sensitive zone is capable of changing opacity in response to exposure to a radiation dosage exceeding a predetermined threshold so as to change the visibility of the indicia thereby providing an indication as to whether the indicator has become irradiated. An optical filter ply may be provided overlying the indicia, and the indicator also may be provided with a transparent protective outer ply. A pressure sensitive adhesive ply having a removable release sheet is employed for attaching the indicator to a substrate.

Radiation dosage indicator

The invention relates to a light stabilizing and antioxidant coating for polyacetylenic recording media which comprises an aqueous composition of ascorbic acid, gelatin and less than 2% by weight of surfactant wherein the mole ratio of acid to gelatin is between about 1:1 and about 10:1 dissolved in from about 35 wt. % to about 80 wt. % of water.

Protective coatings for polyacetylenic recording media

The invention relates to an aqueous coating composition containing a N-alkyl lactam dispersing aid and a water soluble metal salt having an atomic number greater than 50 dispersed in between about 4 and about 50 wt. % of an aqueous binder solution compatible with a binder employed for crystalline polyacetylenic crystals used in an imaging process.

Coating for increasing sensitivity of a radiation imageable

The invention relates to an aqueous coating composition containing an N-alkyl lactam dispersing aid and a water soluble metal salt having an atomic number greater than 50 dispersed in between about 4 and about 50 wt. % of an aqueous binder solution compatible with a binder employed for crystalline polyacetylenic crystals used in an imaging process.

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Caldwell, NJ, United States of America

Robert D Schenfele