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    Compounding extruder with integral recycle loop - incorporating an ancillary transport screw or pump
    73.
    发明专利
    Compounding extruder with integral recycle loop - incorporating an ancillary transport screw or pump 未知

    公开(公告)号：FR2226269A1

    公开(公告)日：1974-11-15

    申请号：FR7313862

    申请日：1973-04-17

    Applicant: AQUITAINE TOTAL ORGANICO

    IPC: B29C48/72 ,  B29F3/02

    Abstract: Extruder for mixing thermoplastic materials and allowing part of the material approaching the outlet die to deviate into an external return loop containing a positive screws or pump for returing the material into one of the mixing zones along the screw in the main barrel. The recycle loop should be maintained at the same temp. as the main barrel. The proportion of material recycled is pref. adjustable. Esp. suitable for general purpose compounding extruders for preparing mixtures requiring different mean residence time for homogenisation.

    Vinyl chloride polymer powder compsns - contg liquid and solid additives and prepd without heating
    74.
    发明专利
    Vinyl chloride polymer powder compsns - contg liquid and solid additives and prepd without heating 未知

    公开(公告)号：FR2225460A1

    公开(公告)日：1974-11-08

    申请号：FR7313305

    申请日：1973-04-12

    Applicant: AQUITAINE TOTAL ORGANICO

    IPC: C08J3/20 ,  C08F29/18 ,  B29B1/04 ,  C08F37/10

    Abstract: Moulding and extrusion compsns., esp. for prodn. of beakers, bottles and other hollow articles, contg. vinyl chloride homo- or copolymer powders (I) and >=1 normally liq. and >=2 normally solid additives are prepd. by (a) mixing all of (I), during or after polymsn., with the liq. additive(s); (b) separately prepg., in the cold, a mixt. of the solid additives; (c) mixing mixts. obtd. in (a) and (b) at room temp. and (d) stirring end-mixt. at =40 degrees C for 10 min. Liq. additives are added to vessel contg. suspension of (I) pref. after completion of polymsn. Process may take place by continuously charging liq. additive-impregnated (I) and solid additive mixt. to a mixer.

    Fire-resistant, high molecular weight, polyamides - from aromatic diacids contg bromine in the ring, and diamines, in a one-stage reaction
    75.
    发明专利
    Fire-resistant, high molecular weight, polyamides - from aromatic diacids contg bromine in the ring, and diamines, in a one-stage reaction 未知

    公开(公告)号：FR2217309A1

    公开(公告)日：1974-09-06

    申请号：FR7304442

    申请日：1973-02-08

    Applicant: AQUITAINE TOTAL ORGANICO

    IPC: C08G69/26 ,  C08G69/42 ,  C07C67/00 ,  C07C69/76

    Abstract: (Chloro)brominated, semi-aromatic polyamides of high M. W are obtd by condensn. in a single stage at 180-300 degrees C while stirring, in an inert atmos of >=1 4-30C alpha-omega-diamino alkane with a stoichiometric proportion of >=1 aryl diester of an aromatic diacid having >=1 Br, atom in the ring, and simultaneously distilling the free phenols formed in the reaction. The pref. acids are mono- or di-bromoterephthalic, mono- or di-bromoisophthalic, or chlorobromotere- or iso-phthalic acids. The diamines are pref 1,12-docane-, 1,22-docosane-, 1,9-nonane-, 1,6-hexane- and trimethylhexamethylene-diamines. The Br in the ring does not modify the mechanical props as additives do. Used in making textiles, electrical, insulation, such as coatings, and fire resistant constructional matls.

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