Thermally expandable fire protection materials - contain expanded graphite, polymeric binders, substances which form carbon skeleton when exposed to fire, and hollow microspheres, etc.

摘要

Thermally expandable fireproofing materials (I) contain (a) expanded graphite, (b) polymeric binders, (c) substances which form a carbon skeleton when exposed to fire, (d) hollow microspheres and opt. (e) other additives. (I) are opt. applied to a supporting sheet. Also claimed is a fire protection laminate, comprising (I) on a supporting sheet. Pref. (b) is chloroprene rubber, polyethylene (PE), polyvinyl acetate (PVAC) and/or polyacrylate, pref. in the form of an aq. latex dispersion. Pref. (c) are PF resins. Pref. (I) contain 10-60 wt.% (a), 5-25 wt.% (b), 2-25 wt.% (c) and 0.5-5 wt.% (d). Pref. (d) are spheres of glass, PVC, polyolefin, PAN, polyester, etc., with dia. 0.05-0.2 mm, and (d) are, e.g. melamine, graphite salts, dicyandiamide, polyammonium phosphates, glass fibre, silica, Al(OH)3 etc. USE/ADVANTAGE - (I) are intumescent materials with improved fire protection properties and a high expansion pressure. (I) are useful esp. as fireproof seals in joints between walls, cable openings etc.; in case of fire, they expand to form a better heat seal than prior-art material