METHOD FOR THE PRODUCTION OF COATED MINERAL GRIT FOR ROOFING OF BUILDINGS

    公开(公告)号:US20230203315A1

    公开(公告)日:2023-06-29

    申请号:US18083620

    申请日:2022-12-19

    CPC classification number: C09C3/006 C09C1/28 C09C3/043 C09C3/12

    Abstract: A method for production of coated mineral grit for the manufacture of coating elements with a bituminous support, or with a support comprising a vinyl or acrylic adhesive, for roofing of buildings, the method includes: adding rough mineral grit to a mixer together with a first treatment mixture; mixing the rough mineral grit and the first treatment mixture until a coated mineral grit is obtained; heating the coated mineral grit to a predetermined firing temperature (Tc); and after heating the coated mineral grit, cooling the coated mineral grit to a predetermined intermediate cooling temperature (Tri). The first treatment mixture comprises: water; at least one pigment; at least one selected from the group consisting of sodium silicate and potassium silicate; kaolin; and at least one selected from the group consisting of an organo-siloxane and an organo-silane.

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