Method for determining relative degree of cure of impregnated tire cord
Abstract
Abstract A METHOD FOR DETERMINING AND CONTROLLING THE DEGREE OF CURE OF A HEAT-CURABLE COMPOSITION. A HEAT-CURABLE SYNTHETIC RESINOUS COMPOSITION COMPRISING A VINYL CHLORIDE OR A VINYLIDENE CHLORIDE POLYMER IS CURED UNDER A PLURALITY OF CONDITIONS DIFFERING IN SEVERITY AND THE PHYSICAL PROPERITIES OF EACH CURED SAMPLE ARE DETERMINED. EACH CURED SAMPLE IS EXTRACTED WITH AN ORGANIC SOLVENT, AND THE PERCENT TRANSMITTANCE OF THE EXTRACT IS SPECTROPHOTOMETRI CALLY DETERMINED IN THE VISIBLE REGION BETWEEN 340-550 MILLIMICRONS. CURE OF THE SAME HEAT-CURABLE COMPOSITION IS THEN CONTROLLED BY MONITORING THE PERCENT TRANSMITTANCE OF EXTRACTS IN THE SAME SOLVENT, MEASURED BY THE SAME PROCEDURE, AND INCREASING OR DECREASING THE SEVERITY OF THE CURING CONDITIONS AS REQUIRED TO MAINTAIN THE MONITORED TRANSMITTANCE AT A DESIRED LEVEL CORRESPONDING WITH DESIRED PHYSICAL PROPERTIES. THE PRESENT TRANSMITTANCE OF THE EXTRACT VARIES INVERSELY AS THE DEGREE OF CURE OF THE POLYMERIC COMPONENT. THE METHOD OF THIS INVENTION IS PARTICLARLY USEFUL FOR CONTROLLING THE CURE OF A RESINOUS COMPOSTION COMPRISING A VINYL CHLORIDE OR A VINYLIDENE CHLORIDE POLYMER APPLIED AS A COATING ON GLASS FILAMENTS.
Inventors
- 👤 Jeanne E Gordon
Bibliographic Details
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