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US 4,732,925 AGranted
Vulcanizable elastomeric roof sheeting and flashing composition
AssigneeThe Firestone Tire & Rubber Company
InventorJames A. Davis
Life of this patent
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Abstract
Vulcanizable elastomeric roof sheeting or flashing compositions comprising a vulcanizable elastomer, a metallurgical carbon and a vulcanizing agent are provided. The compositions may additionally contain conventional thermal or furnace type carbon blacks and other conventional rubber chemical additives. The compositions while lower in cost than elastomeric roof sheeting or flashing compositions containing conventional carbon blacks exhibit comparable physical properties in most instances.
Claims12
A roof sheeting or flashing composition comprising:
- (a) 100 parts by weight of a vulcanizable elastomer selected from the group consisting of EPDM, neoprene, chlorosulfonated polyethylene and chlorinated polyethylene;
- (b) from about 6.0 to bout 55.0 parts by weight of a metallurgical carbon having a particle size distribution of 97% less than 5 microns, 50% less than 1.5 microns and 30% less than 1 micron;
- and
- (c) from about 0.5 to about 6.0 parts by weight of a vulcanizing agent.
1 more element
Dependencies are inferred from the claim text.