Carboxylic acid ester color-stabilized phenolic bound...

C - Chemistry – Metallurgy – 09 – K

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C09K 3/14 (2006.01) C08J 5/14 (2006.01)

Patent

CA 2743858

Described is a color-stable abrasive article that includes a phenolic resin binder; a color stabilizer, a colorant, and abrasive grains. The color stabilizer includes at least one carboxylic acid ester. The color-stable abrasive article is formed by a method including the steps of blending a resole and a color stabilizer to form a resole composition; contacting a plurality of abrasive particles with the resole composition; and curing the resole composition to produce the color-stable abrasive article, Thus provided are color stabilized phenolic bound abrasives and a method for making such abrasives that resist color change over time and upon exposure to high temperature and maintain the mechanical strength of a phenolic resin.

La présente invention concerne un article abrasif de couleur stable qui comprend un liant à base de résine phénolique, un stabilisant de couleur, un colorant et des grains abrasifs. Le stabilisant de couleur comprend au moins un ester d'acide carboxylique. L'article abrasif de couleur stable est formé par un procédé comprenant les étapes consistant à mélanger un résol et un stabilisant de couleur pour former une composition de résol, mettre une pluralité de particules abrasives en contact avec la composition de résol, et durcir la composition de résol pour obtenir l'article abrasif de couleur stable. L'invention concerne donc des abrasifs à liant phénolique aux couleurs stabilisées et un procédé de fabrication de ces abrasifs, lesquels résistent à un changement de couleur avec le temps ou lors d'une exposition à une température élevée et conservent la résistance mécanique dune résine phénolique.

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