Multi-layer product

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/36 (2006.01)

Patent

CA 2468914

The invention relates to a multi-layer product comprising a layer containing polycarbonate and a layer containing a copolyester. The repeating units of the copolyester are derived from dicarboxylic acids and diols. The repeating units derived from dicarboxylic acids are derived in proportions of between 50 and 100 mol % of terephthalic acid, between 0 and 50 mol % of isophthalic acid, and between 0 and 10 mol % of other dicarboxylic acids. The total quantity of repeating units derived from terephthalic acid, isophthalic acid and from the other dicarboxylic acids amounts to 100 mol %. The repeating units derived from diols are derived in proportions of between 0 and 97 mol % of ethylene glycol, between 0 and 97 mol % of cyclohexanedimethanol, between 0 and 3 mol % of diethylene glycol, and between 0 and 10 mol % of other diols. The total quantity of the repeating units derived from ethylene glycol, cyclohexanedimethanol, diethylene glycol and other diols amounts to 100 mol %. The invention also relates to a method for producing said multi-layer product, and to other products containing the cited multi-layer product.

L'invention concerne un produit multicouche qui comprend une couche contenant du polycarbonate et une couche contenant un copolyester. Les motifs récurrents du copolyester sont dérivés d'acides dicarboxyliques et de diols. Les motifs récurrents du copolyester dérivés d'acides dicarboxyliques sont dérivés de 50 à 100 % en moles d'acide téréphtalique et de 0 à 50 % en moles d'acide isophtalique et de 0 à 10 % en moles d'autres acides carboxyliques, la somme des proportions de motifs récurrents dérivés d'acide téréphtalique, d'acide isophtalique et des autres acides carboxyliques étant égale à 100 % en moles. Les motifs récurrents dérivés de diols sont dérivés de 0 à 97 % en moles d'éthylèneglycol, de 0 à 97 % en moles de cyclohexanediméthanol, de 0 à 3 % en moles de diéthylèneglycol et de 0 à 10 % en moles d'autres diols, la somme des proportions de motifs récurrents dérivés d'éthylèneglycol, de cyclohexanediméthanol, de diéthylèneglycol et des autres diols étant égale à 100 % en moles. L'invention concerne en outre un procédé pour préparer ce produit multicouche, ainsi que d'autres produits qui contiennent ledit produit multicouche.

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