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Products of the Oxidative Thermal Degradation of Mine Stoppings and Mine Reinforcing Materials.

PB87191854

Publication Date	1983
Personal Author	Paciorek, K. L.; Kratzer, R. H.; Nakahara, J. H.; Ahmed, S. R.
Page Count	134
Abstract	The primary objective of the program was to determine the toxic fume and fire hazard of materials used in the construction of mine stoppings and in the sealing and reinforcing of mine ribs and roofs. The materials investigated were silicone, phenolic, and isocyanate-based rigid foams, as well as epoxy and acrylate mine sealants. Of the rigid foams tested, the X-156 urethane foam presented the greatest toxic hazard based on toxic load values, and hydrogen chloride was the main toxic species evolved by this foam. In none of the isocyanate-based compositions was hydrogen cyanide the major component, but its contribution increased with temperature. Of the two mine sealants tested, the latex acrylic coating presented the greater toxic hazard; acetic acid was the main toxic species evolved.
Keywords	Mining engineering Thermal degradation Toxicity Reinforcement(Structures) Fire hazards Epoxy(Resins) Sealers Silicones Polyurethane resins Phenolic resins Safety Occupational safety and health
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 71B - Adhesives & Sealants 41I - Job Environment 41F - Joining
Corporate Authors	Ultrasystems, Inc., Irvine, CA.; Bureau of Mines, Washington, DC.
Supplemental Notes	Sponsored by Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Open file rept. 27 Jul 82-30 Nov 83.
NTIS Issue Number	198716
Contract Number	J0395008

Products of the Oxidative Thermal Degradation of Mine Stoppings and Mine Reinforcing Materials.

Products of the Oxidative Thermal Degradation of Mine Stoppings and Mine Reinforcing Materials.
PB87191854

Publication Date	1983
Personal Author	Paciorek, K. L.; Kratzer, R. H.; Nakahara, J. H.; Ahmed, S. R.
Page Count	134
Abstract	The primary objective of the program was to determine the toxic fume and fire hazard of materials used in the construction of mine stoppings and in the sealing and reinforcing of mine ribs and roofs. The materials investigated were silicone, phenolic, and isocyanate-based rigid foams, as well as epoxy and acrylate mine sealants. Of the rigid foams tested, the X-156 urethane foam presented the greatest toxic hazard based on toxic load values, and hydrogen chloride was the main toxic species evolved by this foam. In none of the isocyanate-based compositions was hydrogen cyanide the major component, but its contribution increased with temperature. Of the two mine sealants tested, the latex acrylic coating presented the greater toxic hazard; acetic acid was the main toxic species evolved.
Keywords	Mining engineering Thermal degradation Toxicity Reinforcement(Structures) Fire hazards Epoxy(Resins) Sealers Silicones Polyurethane resins Phenolic resins Safety Occupational safety and health
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 71B - Adhesives & Sealants 41I - Job Environment 41F - Joining
Corporate Authors	Ultrasystems, Inc., Irvine, CA.; Bureau of Mines, Washington, DC.
Supplemental Notes	Sponsored by Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Open file rept. 27 Jul 82-30 Nov 83.
NTIS Issue Number	198716
Contract Number	J0395008