C - Chemistry – Metallurgy – 05 – G
Patent
C - Chemistry, Metallurgy
05
G
C05G 5/00 (2006.01) C05D 9/00 (2006.01) C05G 3/00 (2006.01)
Patent
CA 2402212
A permeable composition, a controlled release product, and methods for producing the permeable composition and controlled release product. The permeable composition includes a matrix material, a particulate filler material, and interfacial passageways between the matrix material and the particles of filler material. The matrix material may include a substrate material and a carrier material. The controlled release product is formed by coating a substrate material with at least one layer of the permeable composition. The methods include the steps of applying a degradable surface treatment material to the particles of filler material and then dispersing the surface treated filler material throughout the matrix material so that degradable interfaces are provided between the matrix material and the particles of filler material.
L'invention concerne une composition perméable, un produit à libération contrôlée et des procédés de production de cette composition perméable et dudit produit à libération contrôlée. La composition perméable comprend une matrice, une matière de charge particulaire et des passages d'interface entre la matrice et les particules de la matière de charge. La matrice peut comprendre un substrat et un support. Le produit à libération contrôlée est formé par enrobage du substrat avec au moins une couche de la composition perméable. Les procédés de l'invention consistent à appliquer une matière de traitement de surface dégradable aux particules de la matière de charge, puis à disperser la matière de charge traitée en surface dans la matrice, de manière que des interfaces dégradables se trouvent entre la matrice et les particules de la matière de charge.
Beachpoint Holdings Inc.
Fording Coal Limited
Na
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