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US 4,391,969 AGranted
Modified sulfur cement
AssigneeThe United States of America as represented by the Department of Commerce
InventorsWilliam C. McBee, Thomas A. Sullivan
Life of this patent
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Abstract
A modified sulfur cement formulation, comprising the polymeric reaction puct of sulfur with a cyclopentadiene oligomer-dicyclopentadiene containing modifier in which the cyclopentadiene oligomer content of said modifier is at least 37 wt. %, the sulfur cement product having a softening point ranging up to 116.degree. C.
Claims8
A modified sulfur cement formulation, consisting essentially of:
- the polymeric reaction product of sulfur with from 2 to 20 wt. % of a cyclopentadiene oligomer mixture-dicyclopentadiene containing modifier, said cyclopentadiene oligomer mixture being free of dicyclopentadiene, wherein the cyclopentadiene oligomer mixture content of said modifier is at least 37 wt. %, said sulfur cement product having a softening point ranging up to 116.degree. C.
A method of preparing a hot modified sulfur cement ready for casting, comprising:
- reacting sulfur with from 2 up to but not including 20 wt. % of a cyclopentadiene oligomer mixture-dicyclopentadiene containing modifier, said oligomer mixture being free of dicyclopentadiene, in which the cyclopentadiene oligomer content of said modifier is at least 37 wt. %, the mixture of sulfur and modifier during the reaction exhibiting a viscosity at 135.degree. C. up to about 180 cp.
Dependencies are inferred from the claim text.