| 摘要 |
New fire-resistant transparent (co)polycarbonates containing alkaline diesters or hemiesters of bis (hydroxy-4-phenyl) alkylphosphonic acids, with the following general formulae (I) or (II): <IMAGE> (I) <IMAGE> (II) (I) where n=1, 2 or 3 (II) where n=0, 1, 2 or 3 and where R1 or R2 is a methyl or ethyl radical, and M is an alkaline metal, such as sodium or potassium. |
