A granular filler and composition for the surface...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 7/04 (2006.01) C08J 5/08 (2006.01) C08J 5/18 (2006.01) C08K 3/00 (2006.01) C08L 23/10 (2006.01)

Patent

CA 2245059

A granular filler for use in a process for preparing a permeable sheet of glass fibre reinforced thermoplastic material suitable for subsequent heating and moulding into a shaped product having an improved surface finish comprising (a) a particulate inorganic material, (b) from 0.1% to 10% by weight, based on the weight of the inorganic material, of fine carbon black, and (c) a sufficient amount of a natural or synthetic latex composition to provide from 1% to 10% by weight of elastomer solids, based on the weight of the inorganic material, and wherein the granules have diameters in the range of from 0.01 mm to 0.1 mm.

Cette invention concerne une charge granulaire utilisée dans un procédé de fabrication d'une feuille thermoplastique renforcée de fibres de verre à être chauffée et moulée pour produire un article à état de surface améliorée. Cette charge comprend (a) une matière inorganique particulaire, (b) du noir de carbone fin représentant de 0.1 % à 10 % du poids de la matière inorganique et (c) une quantité suffisante de latex naturel ou synthétique pour constituer une part solide élastomère représentant de 1 % à 10 % du poids de la matière inorganique, les granules ayant un diamètre compris entre 0.01 et 0.1 mm.

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