C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/08 (2006.01) C03C 25/26 (2006.01)
Patent
CA 2252602
A high solubility size composition is provided which may be applied to glass fibers useful for reinforcing polymeric materials. The size composition includes: a first film former comprising a polyester-based thermoplastic polyurethane derived from a saturated, non-crosslinkable polyester; a second film former comprising at least one ingredient selected from (i) a vinyl acetate glycidyl methacrylate copolymer and (ii) a mixture of a vinyl acetate glycidyl methacrylate copolymer and a vinyl acetate homopolymer; a silane coupling agent; and water. Using glass fibers coated with the high solubility size composition allows the advantageous production of low-pigmented or non- pigmented molded parts having enhanced surface appearance and color uniformity.
La présente invention concerne un ensimage à haute solubilité pouvant être appliqué sur des fibres de verre, utile pour le renforcement des polymères. Cet ensimage comprend une première substance filmogène contenant un polyuréthane thermoplastique à base de polyester dérivé d'un polyester saturé non réticulable; une deuxième substance filmogène contenant au moins un ingrédient choisi entre (i) un copolymère vinyle acétate glycidyle méthacrylate et (ii) un mélange de copolymère vinyle acétate glycidyle méthacrylate et d'homopolymère vinyle acétate; un agent de couplage silane; et de l'eau. L'utilisation de fibres de verre revêtues dudit ensimage à haute solubilité permet de produire avantageusement des pièces moulées peu ou non pigmentées d'aspect amélioré et de couleur plus uniforme.
N.v. Owens-Corning S.a.
Owens Corning Composites S.p.r.l.
Smart & Biggar
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