Process for producing mineral wool

    公开(公告)号:US11814761B2

    公开(公告)日:2023-11-14

    申请号:US16771354

    申请日:2018-12-10

    Abstract: The present invention relates to a process for producing insulating products based on mineral fibers, in particular on mineral wool, comprising



    providing a first binder composition containing

    (a) from 50% to 85% by weight of water, preferably from 70 to 82% of water
    (b) from 10% to 45% by weight, preferably 15 to 35% by weight of a saccharide component containing sucrose,
    (c) from 3% to 15% by weight, preferably from 5 to 12% by weight of one or more ammonium salts or primary amine salts of an acid,


    preparing a second binder composition comprising the dilution of the first aqueous binder composition with water to a solids content of between 3 and 7% by weight,
    applying the second binder composition to mineral fibers,
    forming an assembly of mineral fibers coated with the second binder composition, and
    heating the assembly of coated mineral fibers so as to form an assembly of mineral fibers bound by an insoluble binder,

    said process being characterized in that the first aqueous binder composition has a pH of less than 5.5, in that the ammonium salt or primary amine salt is a salt of strong acid or a salt of an acid having a pKa of less than or equal to 2.2, and in that the first and second binder compositions are devoid of salts of weak acids having at least a pKa of between 2.5 and 6.9.

    GLASS TEXTILE COATED WITH PARTIALLY SOLUBLE DEXTRIN-CONTAINING COATING

    公开(公告)号:US20210348013A1

    公开(公告)日:2021-11-11

    申请号:US17276841

    申请日:2019-10-01

    Abstract: The invention is drawn to a method of coating a glass fiber textile comprising the following steps: —Preparing an aqueous coating composition comprising (a) 5 to 95% by weight, with respect to the total weight of (a) and (b), of a synthetic polymer or oligomer dissolved or dispersed in the aqueous coating composition, and (b) 5 to 95% by weight, with respect to the total weight of (a) and (b), of a dextrin exhibiting a weight-average molecular weight ranging from 250 000 to 2 000 000 Da and a solubility, measured according to a test A, ranging from 50 to 85%, —Applying said aqueous coating composition to a glass fiber textile, thereby obtaining a wet-coated glass fiber textile, —Submitting the wet-coated glass fiber textile to a step of drying and/or curing thereby obtaining a glass fiber textile coated with a water-insoluble polymer coating.

    PROCESS FOR PRODUCING MINERAL WOOL
    9.
    发明申请

    公开(公告)号:US20200340156A1

    公开(公告)日:2020-10-29

    申请号:US16771354

    申请日:2018-12-10

    Abstract: The present invention relates to a process for producing insulating products based on mineral fibers, in particular on mineral wool, comprising providing a first binder composition containing (a) from 50% to 85% by weight of water, preferably from 70 to 82% of water (b) from 10% to 45% by weight, preferably 15 to 35% by weight of a saccharide component containing sucrose, (c) from 3% to 15% by weight, preferably from 5 to 12% by weight of one or more ammonium salts or primary amine salts of an acid, preparing a second binder composition comprising the dilution of the first aqueous binder composition with water to a solids content of between 3 and 7% by weight, applying the second binder composition to mineral fibers, forming an assembly of mineral fibers coated with the second binder composition, and heating the assembly of coated mineral fibers so as to form an assembly of mineral fibers bound by an insoluble binder, said process being characterized in that the first aqueous binder composition has a pH of less than 5.5, in that the ammonium salt or primary amine salt is a salt of strong acid or a salt of an acid having a pKa of less than or equal to 2.2, and in that the first and second binder compositions are devoid of salts of weak acids having at least a pKa of between 2.5 and 6.9.

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