Barium carbonate as a modifier for certain non-rigid polymethane forms

Claim 1

IN AN IMPROVED FLAME-RETARDANT FLEXIBLE OR SEMIFLEXIBLE FOAM COMPRISING THE REACTION PRODUCTION OF A. 100 PARTS BY WEIGHT OF A POLYOL SELECTED FROM THE GROU CONSISTNG OF PRIMARY AND SECONDARY HYDROXYTERMINATED POLYALKYLENE ETHERS EXHIBITING A MOLECULAR WEIGHT BETWEEN 1,000 AND 10,000; B. AN ORGANIC-DI OR TRIISOCYANATE IN AN AMOUNT BETWEEN 0.70 AND 1.35 MOLES PER TOTAL MOLE OF ACTIVE HYDROGEN PRESENT, AS DETERMINED BY THE ZEREWITINOFF METHOD; C. BETWEEN 1.5 AND 5 PARTS OF WATER OR OTHER BLOWING AGENT; D. BETWEEN 0.1 AND 0.9 PARTS OF A GEL CATALYST; E. A FLAME RETARDANT CONSISTING ESSENTIALLY OF ANTIMONY TRIOXIDE AND BETWEEN 2 AND 100 PARTS OF A FINELY DIVIDED HALOGEN-CONTAINING POLYMER; THE IMPROVEMENT WHICH COMPRISES THE PRESENCE OF BARIUM CARBONATE IN AN AMOUNT BETWEEN 2 AND 50% BASED ON THE WEIGHT OF SAID ANTIMONY TRIOXIDE, THE COMBINED WEIGHT OF ANTIMONY TRIOXIDE AND BARIUM CARBONATE CONSTITUTING BETWEEN 2 AND 20%, BASED ON THE WEIGHT OF SAID POLYOL.