Amorphous copolyamides comprising...

C - Chemistry – Metallurgy – 08 – G

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C08G 69/02 (2006.01) C08G 69/26 (2006.01) C08L 77/06 (2006.01)

Patent

CA 2643741

The present invention relates to amorphous transparent copolyamides of formula: PACM.T / D.X / X1.Y1 resulting from the condensation of PACM, terephtalic acid, a diamine D, a diacid X, a diamine X1 and a diacid Y1 in which : PACM denotes the p-bis(aminocyclohexyl)methane, T denotes terephtalic acid, D denotes a diamine chosen from aromatic, arylaliphatic and cycloaliphatic diamines, X denotes a diacid HOOC-(CH2)n-COOH having from 8 to 20 carbon atoms, XI denotes an aliphatic diamine, Y1 denotes a diacid HOOC-(CH2)n-COOH having from 6 to 20 carbon atoms, the mol proportion of PACM.T is such as (PACM.T)/(PACM.T+D.X) is above 0.5, and can be increased to 1 , the mol proportion of X1 is between 16% and 38%, X1.Y1 can be replaced partly or totally by Z, a lactam or an alpha-omega aminocarboxylic acid, having from 9 to 20 carbon atoms, and in this case the mol proportion of Z is between 33% and 75%.

La présente invention concerne des copolyamides transparents amorphes de formule : PACM.T / D.X / X1.Y1 résultants de la condensation du PACM, de l'acide téréphtalique, d'une diamine D, d'un diacide X, d'une diamine X1 et d'un diacide Y1, dans laquelle : PACM désigne le p-bis(aminocyclohexyl)méthane, T désigne l'acide téréphtalique, D désigne une diamine choisie parmi des diamines aromatiques, arylaliphatiques et cycloaliphatiques, X désigne un diacide HOOC-(CH2)n-COOH ayant de 8 à 20 atomes de carbone, X1 désigne une diamine aliphatique, Y1 désigne un diacide HOOC-(CH2)n-COOH ayant de 6 à 20 atomes de carbone, la proportion molaire de PACM.T est telle que le rapport (PACM.T)/(PACM.T+D.X) est supérieur à 0,5 et peut être augmenté à 1 , la proportion molaire de X1 est comprise entre 16 % et 38 %, X1.Y1 peut être remplacé en partie ou totalement par Z, un lactame ou un acide alpha,oméga-aminocarboxylique, ayant de 9 à 20 atomes de carbone, et dans ce cas la proportion molaire de Z est comprise entre 33 % et 75 %.

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