3.
    发明专利
    未知

    公开(公告)号:DE59812052D1

    公开(公告)日:2004-11-11

    申请号:DE59812052

    申请日:1998-01-13

    Applicant: DEGUSSA

    Abstract: A method for the production of precipitated polyamide powder with narrow particle size distribution and low porosity comprises: (a) dissolving a (co)polyamide of lactams, omega -aminocarboxylic acids and/or diamines and dicarboxylic acids, each with NOTLESS 10 C, in a 1-3C aliphatic alcohol; (b) cooling to the seed formation temperature without precipitation; (c) cooling again until the solution is supersaturated; and (d) drying the suspension after precipitation.

    4.
    发明专利
    未知

    公开(公告)号:DE50004759D1

    公开(公告)日:2004-01-29

    申请号:DE50004759

    申请日:2000-01-21

    Applicant: DEGUSSA

    Abstract: The thermoplastic composite material comprises a polyamide layer bonded to a polyester layer by means of an adhesive (I) comprising a blend of polyamide prepared from stoichiometric amounts of a diamine containing 6-12C atoms and dicarboxylic acids, and a polyester prepared from a diol containing a mixture of dicarboxylic acids. Thermoplastic composite material comprises a polyamide layer bonded to a polyester layer by means of an adhesive (I) comprising at least 50 wt.% of a blend of: (a) 20-80 wt.% of a polyamide prepared from stoichiometric amounts of a diamine containing 6-12C atoms and dicarboxylic acids, including at least 5 mol% of dicarboxylic acids (II) containing 10-36 C atoms; and (b) 20-80 wt.% of a polyester prepared from a diol containing 2-12 C atoms and a mixture of 30-95 mol% of an aromatic dicarboxylic acid containing 6-20 C atoms and 5-70 mol% (II). Independent claims are also included for the following: (1) production of the composite material by multicomponent injection molding, coextrusion or coextrusion/blow molding; (2) an adhesive as defined for (I).

    6.
    发明专利
    未知

    公开(公告)号:DE50101434D1

    公开(公告)日:2004-03-11

    申请号:DE50101434

    申请日:2001-10-26

    Applicant: DEGUSSA

    Abstract: A molding composition of at least 50% by weight of a polyamine-polyamide copolymer obtained from 0.05 to 2.5% by weight of a polyamine having at least 4 nitrogen atoms and having a viscosity of at least 5 000 Pa.s at 250° C. and at a shear rate of 0.1 l/s, and having a viscosity ratio of at least 7 at 250° C., when the melt viscosities at shear rates of 0.1 l/s and 100 l/s are compared with one another, has high melt stiffness and is easy to cut, and performs well in blow molding.

Patent Agency Ranking