An unsaturated polyester resin composition

Details An unsaturated polyester resin composition An unsaturated polyester resin composition

C - Chemistry, Metallurgy

08

L

C08L 67/06 (2006.01) C08F 283/01 (2006.01) C08K 3/00 (2006.01) C08K 3/22 (2006.01) C08K 3/40 (2006.01)

Patent

CA 2204816

An unsaturated polyester resin composition which comprises 100 parts by weight of a resin mixture comprising 25 to 80 parts by weight of an unsaturated polyester, 20 to 60 parts by weight of a comonomer and 1 to 10 parts by weight of a particulate crosslinked polymer and 100 to 400 parts by weight of an inorganic filler and in which the difference in refractive index between a product of copolymerization of the unsaturated polyester with the comonomer and the inorganic filler is 0.02 or below; and molded articles produced by curing the resin composition by heating under pressure. The resin composition has a high yield, exhibits excellent light transmittance and gloss, and is excellent in water resistance and which is suitable for the production of artificial marble.

Une composition de résine de polyester insaturée qui comprend 100 parties en poids d'un mélange de résine comprenant 25 à 80 parties en poids d'un polyester insaturé, 20 à 60 parties en poids d'un comonomère et 1 à 10 parties en poids d'un polymère particulaire réticulé et 100 à 400 parties en poids d'une charge inorganique; dans cette composition, la différence d'indice de réfraction entre un produit de copolymérisation du polyester insaturé avec le comonomère et la charge inorganique est de 0,02 ou moins; articles moulés produits par durcissement de la composition de résine par chauffage sous pression. La composition de résine se caractérise par un rendement élevé, d'excellentes propriétés du point de vue de transmission de la lumière, du brillant et de la résistance à l'eau et convient à la production de marbre artificiel.

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