| 摘要 |
1298543 Metal-containing polymers PENNWALT CORP 19 April 1971 [11 March 1970] 23515/71 Heading C3R [Also in Division C2] A polymer having a repeating unit of the formula where M is arsenic and/or phosphorus, R 1 -R 4 are alkyl, aryl, alkoxy or aryloxy is prepared by reacting a water-soluble Cr(III) salt with at least one substituted phosphinate and/or arsinate of formula ZOM 1 R 1 R 2 O and/or ZOM 2 R 3 R 4 O where Z is hydrogen, Na or K, in an aqueous medium in the presence of an alkaline neutralizing agent such as an alkali metal carbonate or hydroxide preferably at 50-100‹ C. for 30-90 minutes. Polymers having molecular weights ranging from 2000 to 100,000 are obtained. Preferably the aqueous medium is a watertetrahydrofuran system. Polymers are prepared in which (i) R 1 -R 4 are C 6 H 5 , M=P; (ii) R 1 R 3 = CH 3 ,R 2 ,R 4 =C 6 H 5 ,M=P; (iii) R 1 -R 4 = C 8 H 17 , M = P; (iv) R 1 ,R 2 = C 6 H 5 , R 3 ,R 4 = C 8 H 17 , M = P; (v) R 1 -R 4 =C 6 H 5 , M=As; (vi) R 1 -R 4 =C 6 H 5 , M=As and P. |
