| abstract |
A low smoke generating, high char forming, substantially nondripping flame resistant thermoplastic multi-block copolyester wherein the weight ratio of high melting point blocks to low melting point blocks is from about 8:1 to 1:4, and said copolyester has a melting point below about 175° C., said copolyester composition containing a bromine containing flame retardant; antimony trioxide; a drip suppressant for the multi-block copolyester, 25-65 parts per 100 parts multi-block copolyester of 50-88% alumina trihydrate and 12-50% of a magnesium compound selected from the group consisting of magnesium carbonate, magnesium oxide, and particulate magnesium hydroxide and, optionally, containing calcium carbonate and, preferably, containing a coupling agent having a hydrolyzable moiety containing titanium or silicon and an organophilic group. |