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    12.
    发明专利
    未知

    公开(公告)号：BR7308310D0

    公开(公告)日：1974-09-24

    申请号：BR831073

    申请日：1973-10-24

    Applicant: HOECHST AG

    Inventor： RACKY W ,  KLEINER H ,  HERVING W

    IPC: C08L67/00 ,  C08G63/00 ,  C08G63/78 ,  C08K5/5313 ,  C08G39/02

    Abstract: 1433210 Flame-resistant polyester compositions HOECHST AG 10 Oct 1973 [25 Oct 1972] 47318/73 Heading C3R A thermoplastic composition comprises a linear saturated polyester having a reduced specific viscosity of from 0À5-2À0 dl./g. (determined in a 1% wt. solution in a 60 : 40 phenol/tetrachloroethane mixture at 25‹ C.) and from 5À5-35% wt., based on the polyester of an alkali metal salt of a phosphinic or diphosphinic acid of the formula (R) 2 PO(OM) or (MO)(R)PO(R 1 )PO(R)(OM), where M is an alkali metal, R is a C 1 -C 16 alkyl radical, a C 6 - C 16 aryl or a C 7 -C 16 aralkyl radical, and R 1 is a C 1 -C 6 alkylene radical, a C 3 -C 6 oycloalkylene radical, an arylene radical or an arylene-alkylene radical having from 1-6 carbon atoms in the alkylene radical. The preferred polyesters are polyalkylene terephthalates which may contain upto 10 mole per cent of other aromatic or aliphatic dicarboxylic acid components and other diol components. The phosphorus compound may be added during the preparation of the polyester or to a preformed granulated polyester. Optional ingredients include inorganic fibre materials such as glass fibres and fibres of quartz, asbestos or carbon, preferably 0À1-50 microns in diameter and 0À01-5 mm. in length. Examples 1 and 2 describe compositions of polyethylene terephthalate or polybutylene terephthalate containing the sodium salt of dimethyl phosphinic acid and additionally in (1) germanium phosphite, the phosphorus compounds being added during the preparation of the polyester. In Example 3 a composition is prepared by mixing granular polyethylene terephthalate with the di-sodium salt of ethane 1,2-di-(methylphosphinic acid). The polyesters may be used for the preparation of moulded articles, films, filaments and fibres by compression moulding, injection moulding or extrusion.

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