Abstract 1. IN A PROCESS FOR THE STABILIZATION OF AN ACRYYLIC FIBROUS MATERIAL OR FILM SELECTED FROM THE GROUP CONSISTING OF AN ACRYLONITRILE HOMOPOLYMER AND ACRYLONITRILE COPOLYMERS CONTAINING AT LEAST ABOUT 85 MOL PERCENT OF ACRYLONITRILE UNITS AND UP TO ABOUT 15 MOL PERCENT OF ONE OR MORE MONOVINYL UNITS COPOLYMERIZED THEREWITH BY HEATING IN AN OXYGEN-CONTAINING ATMOSPHERE, THE IMPROVEMENT COMPRISING: (A) PROVIDING SAID ACRYLIC FIBROUS MATERIAL OR FILM IN INTIMATE ASSOCIATION WITH ABOUT 0.2 TO 10 PERCENT BY WEIGHT OF AN ALKALI METAL SALT OF AN ORGANIC SULFONATE, WITH SAID ALKALI METAL SALT OF AN ORGANIC SULFONATE BEING INCORPORATED THEREIN IN A NONPOLYMERIZED FORM AND BEING CAPABLE OF PROMOTING THE THERMAL STABILIZATION THEREOF, AND (B) HEATING SAID ACRYLIC FIBROUS MATERIAL OR FILM AT A TEMPERATURE OF ABOUT 240 TO 310*C. UNTIL A STABILIZED FIBROUS MATERIAL OR FILM IS FORMED WHICH RETAINS ITS ORIGINAL CONFIGURATION SUBSTANTIALLY INTACT AND WHICH IS NON-BURNING WHEN SUBJECTED TO AN ORDINARY MATCH FLAME.
IN A PROCESS FOR THE STABILIZATION OF AN ACRYYLIC FIBROUS MATERIAL OR FILM SELECTED FROM THE GROUP CONSISTING OF AN ACRYLONITRILE HOMOPOLYMER AND ACRYLONITRILE COPOLYMERS CONTAINING AT LEAST ABOUT 85 MOL PERCENT OF ACRYLONITRILE UNITS AND UP TO ABOUT 15 MOL PERCENT OF ONE OR MORE MONOVINYL UNITS COPOLYMERIZED THEREWITH BY HEATING IN AN OXYGEN-CONTAINING ATMOSPHERE, THE IMPROVEMENT COMPRISING: (A) PROVIDING SAID ACRYLIC FIBROUS MATERIAL OR FILM IN INTIMATE ASSOCIATION WITH ABOUT 0.2 TO 10 PERCENT BY WEIGHT OF AN ALKALI METAL SALT OF AN ORGANIC SULFONATE, WITH SAID ALKALI METAL SALT OF AN ORGANIC SULFONATE BEING INCORPORATED THEREIN IN A NONPOLYMERIZED FORM AND BEING CAPABLE OF PROMOTING THE THERMAL STABILIZATION THEREOF, AND (B) HEATING SAID ACRYLIC FIBROUS MATERIAL OR FILM AT A TEMPERATURE OF ABOUT 240 TO 310*C. UNTIL A STABILIZED FIBROUS MATERIAL OR FILM IS FORMED WHICH RETAINS ITS ORIGINAL CONFIGURATION SUBSTANTIALLY INTACT AND WHICH IS NON-BURNING WHEN SUBJECTED TO AN ORDINARY MATCH FLAME.
Claim 2
Dependent Claim
156 words
IN A PROCESS FOR THE STABILIZATION OF AN ACRYYLIC FIBROUS MATERIAL OR FILM SELECTED FROM THE GROUP CONSISTING OF AN ACRYLONITRILE HOMOPOLYMER AND ACRYLONITRILE COPOLYMERS CONTAINING AT LEAST ABOUT 85 MOL PERCENT OF ACRYLONITRILE UNITS AND UP TO ABOUT 15 MOL PERCENT OF ONE OR MORE MONOVINYL UNITS COPOLYMERIZED THEREWITH BY HEATING IN AN OXYGEN-CONTAINING ATMOSPHERE, THE IMPROVEMENT COMPRISING: (A) PROVIDING SAID ACRYLIC FIBROUS MATERIAL OR FILM IN INTIMATE ASSOCIATION WITH ABOUT 0.2 TO 10 PERCENT BY WEIGHT OF AN ALKALI METAL SALT OF AN ORGANIC SULFONATE, WITH SAID ALKALI METAL SALT OF AN ORGANIC SULFONATE BEING INCORPORATED THEREIN IN A NONPOLYMERIZED FORM AND BEING CAPABLE OF PROMOTING THE THERMAL STABILIZATION THEREOF, AND (B) HEATING SAID ACRYLIC FIBROUS MATERIAL OR FILM AT A TEMPERATURE OF ABOUT 240 TO 310*C. UNTIL A STABILIZED FIBROUS MATERIAL OR FILM IS FORMED WHICH RETAINS ITS ORIGINAL CONFIGURATION SUBSTANTIALLY INTACT AND WHICH IS NON-BURNING WHEN SUBJECTED TO AN ORDINARY MATCH FLAME.