C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 69/26 (2006.01) C08G 69/28 (2006.01) C08G 69/30 (2006.01)
Patent
CA 2636063
The invention relates to a semi-crystalline semi-aromatic polyamide comprising A-A-B-B units derived from (a) dicarboxylic acids consisting of a mixture of aromatic dicarboxylic acid and aliphatic dicarboxylic acid and (b) diamines consisting of a mixture of long chain aliphatic diamine and short chain aliphatic diamine, wherein (a- i) the aromatic dicarboxylic acid consists for at least 80 mole % of terephthalic acid, and (a-ii) the aliphatic dicarboxylic acid constitutes at least 5 mole% of the dicarboxylic acids, (b-i) the short chain aliphatic diamine constitutes at least 10 mole% of the diamines, and (c) the aromatic dicarboxylic acid and the long chain aliphatic diamine constitute 60-90 mole % of the total molar amount of dicarboxylic acids and diamines.
L'invention concerne un polyamide semi-aromatique semi-cristallin comprenant des unités A-A-B-B dérivées (a) d'acides dicarboxyliques constitués d'un mélange d'acide dicarboxylique aromatique et d'acide dicarboxylique aliphatique et (b) de diamines constituées d'un mélange de diamine aliphatique à chaîne longue et de diamine aliphatique à chaîne courte, caractérisé en ce que (a-i) l'acide dicarboxylique aromatique constitue au moins 80 % en mole d'acide téréphtalique et (a-ii) l'acide dicarboxylique aliphatique constitue au moins 5 % en mole des acides dicarboxyliques, (b-i) la diamine aliphatique à chaîne courte constitue au moins 10 % en mole des diamines et (c) l'acide dicarboxylique aromatique et la diamine aliphatique à chaîne longue constituent 60-90 % en mole de la quantité molaire totale des acides dicarboxyliques et des diamines.
Crombach Robert Conrad Barbara
Rulkens Rudy
Dsm Ip Assets B.v.
Smart & Biggar
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