Soft hand copolyamide composition

    公开(公告)号:US10544263B2

    公开(公告)日:2020-01-28

    申请号:US15126492

    申请日:2015-03-05

    Applicant: ARKEMA FRANCE

    Abstract: Composition comprising, on a weight basis, the total being equal to 100%: from 98% to 100% of at least one copolyamide bearing amide units and polyether units, having a melting point (Tm) from about 90 to about 150° C., in particular from about 100° C. to about 125° C., and having a flexural modulus of less than 100 MPa, as determined according to standard ISO 178 (2010); from 0 to 2% of at least one additive chosen from stabilizers and dyes, or a mixture thereof, for the manufacture of a heat-sensitive adhesive, in particular a veil, a film, granules, a filament, a grate, a powder or a suspension.

    Use of a fine aqueous polymer dipersion for the impregnation of natural fibres

    公开(公告)号:US10023704B2

    公开(公告)日:2018-07-17

    申请号:US15310626

    申请日:2015-05-07

    Applicant: ARKEMA FRANCE

    Abstract: The use of an aqueous polymer dispersion including at least one amorphous polymer having a Tg varying between 55° C. and 175° C. or a semi-crystalline polymer having a melting point varying between 70° C. and less than 220° C., the weight concentration of the polymer in the dispersion varying between 5 and 50%, with the polymer particles having an average size of less than 10000 nm, as a binder for impregnating strands or strips of natural fibers, in particular flax fibers, with said polymer being incorporated in the core of the fiber bundle forming the strand or strip and thereby binding the fibers together.

    Water-dispersible polyamide powder

    公开(公告)号:US10323130B2

    公开(公告)日:2019-06-18

    申请号:US14413114

    申请日:2013-07-08

    Applicant: ARKEMA FRANCE

    Inventor: Quentin Pineau

    Abstract: A powder of polyamide particles, in which: said polyamide includes more than 50 mol % of amine ends among the total number of amine and acid ends of the polyamide; said particles include, on the surface thereof, primary amine groups neutralized by a phosphorous Bronsted acid, such as phosphoric acid; and the D50 of the particles falls within the range of 100 nm to 50 μm, preferably 100 nm to 20 μm. A method for producing such a powder and to the production of aqueous dispersions including same.

    Hydrolysis-resistant, CO2-permeable block copolymer

    公开(公告)号:US11578163B2

    公开(公告)日:2023-02-14

    申请号:US16770651

    申请日:2018-12-07

    Applicant: Arkema France

    Abstract: The invention relates to a block copolymer comprising at least one rigid polyamide block and at least one flexible block, characterized in that the flexible block has an NH2/OH ratio of concentrations of amine chain ends to alcohol chain ends which is within the range from 30 to 150, said concentrations being measured by 1H NMR (TFanh./CD2Cl23). The invention also relates to the use of a flexible block for manufacturing a copolymer containing polyamide blocks and flexible blocks that is both hydrolysis-resistant and CO2-permeable, with a permeability to CO2 of at least 10 000 cm3/m2/24 h/atm for a 25 μm film of said copolymer, characterized in that said flexible block has a ratio of amine chain ends to acid chain ends which is within the range from 30 to 150.

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