C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 77/00 (2006.01) B29B 9/00 (2006.01)
Patent
CA 2649427
Transparent blend or alloy comprising, by weight, the total being 100%: (A) 1 to 99% of at least one copolymer constituent: which is amorphous or has a crystallinity ranging up to semi-crystallinity; and - which comprises: (A1) amide units, among which is at least one cycloaliphatic unit; (A2) flexible ether units; (B) 99 to 1% of at least one polymer constituent selected from: (Ba) semi-crystalline copolyamides comprising amide units (Ba1) and comprising ether units (Ba2), (Bb) semi-crystalline polyamides or copolyamides without ether units, (Bc) transparent polyamides or copolyamides, without ether units, which are amorphous or weakly crystalline, and alloys based on such polyamides or copolyamides; and (C) 0 to 50% by weight of at least one polyamide, copolyamide, copolyamide comprising ether units or alloy based on such polyamides or copolyamides other than those used in (A) and (B) above. The resulting blend or alloy has a high transparency such that the transmittance at 560 nm on a plate 2 mm thick is greater than 50%.
Mélange ou alliage transparent comprenant, en poids, le total étant 100 % : (A) 1 à 99% d'au moins un constituant copolymère : étant amorphe ou présentant une cristallinité allant jusqu'à la semi- cristallinité; et - comportant : (A1) des motifs amides parmi lesquels se trouve au moins un motif cycloaliphatique; (A2) des motifs souples éthers; (B) 99 à 1% d'au moins un constituant polymère choisi parmi : (Ba) les copolyamides semi-cristallins à motifs amides (Ba1) et à motifs éthers (Ba2), (Bb) les polyamides ou copolyamides semi-cristallins sans motifs éthers, (Bc) les polyamides ou copolyamides transparents, sans motifs éthers, étant amorphes ou faiblement cristallins et les alliages à base de tels polyamides ou copolyamides; et (C) 0 à 50% en poids d'au moins un polyamide, copolyamide, copolyamide à motifs éthers ou alliage à base de tels polyamides ou copolyamides autres que ceux utilisés en (A) et (B) ci-dessus. Le mélange ou alliage résultant présente une transparence élevée telle que la transmittance à 560 nm sur plaque de 2 mm d'épaisseur est supérieure à 50%.
Blondel Philippe
Montanari Thibaut
Arkema France
Robic
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