2 results about "Intumescent" patented technology

An expansion joint seal system which includes intumescent to protect uncoated edges of substrates. A fire rated compressed expansion joint sealant is provided having an intumescent proximate, but below the water-resistant top of the fire-retardant foam, so that when exposed to fire, the intumescent expands to protect the exposed vertical surface of the adjacent concrete substrate. The end of the concrete is therefore protected in a manner which does not require joint overlap between the horizontal fire resistant coating and the compressible sealant.

The invention provides a highly flame-retardant polypropylene foaming sheet and a preparation method thereof. The highly flame-retardant polypropylene foaming sheet is prepared from the following components in parts by weight: 70-78 parts of polypropylene resin, 7-10 parts of polyethylene resin, 8-12 parts of polyoxyethylene resin, 4-6 parts of a cross-linking agent, 4-6 parts of an anti-aging agent, 5-10 parts of a foaming agent, 1-1.5 parts of a compound intumescent flame retardant, 1-2 parts of a bromine-nitrogen compound flame retardant and 1-2 parts of a halogen-free flame retardant. The highly flame-retardant polypropylene foaming sheet is remarkably improved in flame resistance, tensile strength, elongation at break and the like, and low in flame retardant dosage.