Fire retardant compositions utilizing elemental sulfur
AssigneeArizona Board of Regents on Behalf of the University of Arizona
InventorDong-Chul Pyun
Life of this patent
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Abstract
Compositions of flame retardants and methods of enhancing char formation in a flame retardant-treated substrate. A base material is combined with a flame retardant to form the flame retardant-treated substrate. The flame retardant contains a sulfur copolymer prepared by the polymerization of sulfur monomers with organic monomers. The flame retardant can be deposited on a surface of the base material, coated on the base material, or mixed into the base material. When the flame resistant substrate is on fire, the flame retardant forms a charring layer on the flame retardant-treated substrate. The charring layer can extinguish and prevent the fire from spreading.
Claims20
A fire retardant composition comprising a polymeric blend of:
- a. at least about 50 wt % of a thermoplastic polymer;
- and
- b. about 10-50 wt % of a sulfur copolymer, the sulfur copolymer comprising at least about 40 wt % of sulfur monomers, and about 10-50 wt % of ethylenically unsaturated comonomers, wherein the comonomers are polymerized with the sulfur monomers;
- wherein when a substrate combined with the fire retardant composition is on fire, the fire retardant composition forms a charring layer on a surface of the substrate that is effective for extinguishing the fire.
A fire retardant composition comprising a sulfur copolymer, the sulfur copolymer comprising:
- a. at least about 40 wt % of sulfur monomers;
- and
- b. about 10-50 wt % of ethylenically unsaturated comonomers, wherein the comonomers are polymerized with the sulfur monomers;
- wherein when a substrate combined with the fire retardant composition is on fire, the fire retardant composition forms a charring layer on a surface of the substrate that is effective for extinguishing the fire.
Dependencies are inferred from the claim text.