| 摘要 |
<p>1533425 Polyamide-imides CIBA GEIGY AG 20 Jan 1976 [20 Jan 1975 15 Sept 1975] 02155/76 Heading C3R Soluble polyamide-imides and their precursor polyamide-acids are characterized by units derived from a phenylindane diamine (with or without other diamines) and from trimellitic acid (with or without a tetra-acid or diacid). Reference is made to Specification 1,460,705 and 1,533,424.</p> |
