1.
    发明专利
    未知

    公开(公告)号:DK139629B

    公开(公告)日:1979-03-19

    申请号:DK404773

    申请日:1973-07-20

    Applicant: HOECHST AG

    Abstract: 1435162 Flame resistant polyester fibres HOECHST AG 20 July 1973 [22 July 1972] 34663/73 Heading C3R [Also in Division C2] Fibres or filaments are made from a polyester comprising dicarboxylic acid units, diol units and units of the formula in which R is an alkylene, cycloalkylene, arylene or aralkylene radical and R 1 and R 2 are C 1-6 alkyl or an aryl or aralkyl group, and R, R 1 and R 2 may carry substituents or contain hetero atoms. The examples describe fibres of polyesters prepared from dimethyl terephthalate, optionally with dimethyl isophthalate, ethylene glycol or 1,4-butanediol and methylene- or ethylene-di(methylphosphinic acids), phenylene - 1,4 - di(methylphosphinic acid), pxylylene - di(methyl - phosphinic acid), ethylene - 1,2 - di(phenylphosphinic acid)

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