| 摘要 |
synthesis of linear polyester; imidation and copolylmerization; producing the branch of polymer and increasing molecular wt.; and most suitably mixg. the varnish. In synthesis stage of linear polyester, reaction proceeding degree is 70-90% on the basis of theoretical reaciton biproduct. In imidation stage, raw material soln. which is obtd. by dissolving solid raw material in primary alcohols having primary hydroxide gp. and 190-240≦̸C boiling point, is used. The obtd. polyester varnish has good head-resistant properties.
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