Ultra low density thermally clad microspheres

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 9/16 (2006.01) B01J 13/14 (2006.01) B01J 13/22 (2006.01) C08J 9/224 (2006.01) C08J 9/32 (2006.01)

Patent

CA 2570832

Microsphere beads are mixed with a surface barrier solid, liquid or mixture of such a liquid with a solid effective to prevent agglomeration and surface bonding of the microspheres. By controlling the application of heat and balancing temperature and active mixing, expansion of the microspheres to an ultra low density is achieved. Microsphere densities of as low as 0.005 to less than 0.015 g/cm3 are realized. The surface barrier material in the present invention may be selected from among a wide diversity of materials which meet the requirements of the intended function, i.e., to prevent the agglomeration of the microspheres during the process. Suitable materials include, by way of example, fillers, pigments, plasticizers, diluents, extenders, monomers and oligomers and the like.

La présente invention concerne des billes microsphère mélangées avec un liquide , un solide barrière de surface ou un mélange de ce liquide avec un solide efficace pour empêcher l'agglomération et le collage en surface des microsphères. Par la commande de l'application de chaleur et de l'équilibre de température et par un mélange actif, on obtient une dilatation des microsphères en une densité ultra faible. On obtient des densités des microsphères comprises entre 0.005 à moins de 0.015 g/cm3. Le matériau barrière de surface de la présente invention peut être sélectionné parmi une grande diversité de matériaux qui remplissent les conditions de la fonction recherchée, à savoir empêcher l'agglomération des microsphères pendant le processus. Des matériaux adaptés comprennent par exemple, des liants, des pigments, des plastifiants, des diluants, des allonges, des monomères et des oligomères ainsi que des éléments similaires.

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