Patent ID: 6017987
Filing Date: 2000-01-25
Classification: C08K

Abstract:
A fire-retardant polymer composition which contains no halogen and which consists of the components:(A) 100 parts by weight of a polymer,(B) 1 to 30 parts by weight of heat-expandable graphite, and(C) 1 to 30 parts by weight of a metal oxide,wherein the polymer (A) is selected from the polyurethanes; the heat-expandable graphite (B) changes in specific volume thereof on rapid heating from room temperature to 800-1000.degree. C. by 100 ml/g or more; and the metal oxide (C) is an oxide or a complex oxide containing one or more metals selected from the group consisting of antimony, bismuth, zirconium, molybdenum, tungsten, magnesium, and zinc.