Polyester compositions which comprise cyclobutanediol and at...

C - Chemistry – Metallurgy – 08 – L

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Details

C08L 67/02 (2006.01) C08G 63/199 (2006.01) C08G 63/85 (2006.01) C08K 5/52 (2006.01) C08L 69/00 (2006.01)

Patent

CA 2625846

Described as one aspect of the invention are polyester compositions containing: (I) at least one polyester which comprises: (a) a dicarboxylic acid component comprising: (i) 70 to 100 mole % of terephthalic acid residues; (ii) 0 to 30 mole % of aromatic dicarboxylic acid residues having up to 20 carbon atoms; and (iii) 0 to 10 mole % of aliphatic dicarboxylic acid residues having up to 16 carbon atoms; and (b) a glycol component comprising: (i) 1 to 99 mole % of 2,2 ,4,4-tetramethyl-1,3- cyclobutanediol residues; and (ii) 1 to 99 mole % of cyclohexanedimethanol residues; and (II) at least one thermal stabilizer chosen from at least one phosphorus compound, reaction products thereof, and mixtures thereof; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %; wherein the inherent viscosity of the polyester is from 0.35 to 1.2 dL/g as determined in 60/40 (wt/wt) phenol/ tetrachloroethane at a concentration of 0.25 g/50 ml at 25~C.

Cette invention concerne, selon un aspect, des compositions de polyester contenant: (I) au moins un polyester qui comprend: (a) un composant acide dicarboxylique comprenant: (i) de 70 à 100 % en mole de résidus d'acide téréphtalique; (ii) de 0 à 30 % en mole de résidus d'acide dicarboxylique aromatique comportant jusqu'à 20 atomes de carbone; et (iii) de 0 à 10 % en mole de résidus d'acide dicarboxylique aliphatique comportant jusqu'à 16 atomes de carbone; et (b) un composant glycol comprenant: (i) de 1 à 99 % en mole de résidus de 2,2,4,4-tétraméthyl-1,3-cyclobutanediol; et (ii) de 1 à 99 % en mole de résidus de cyclohexanediméthanol; et (II) au moins un stabilisant thermique choisi parmi au moins un composé phosphoreux, des produits de réaction de celui-ci et des mélanges de celui-ci. Selon cette invention, le pourcentage en mole total de composant acide dicarboxylique est de 100 % en mole tandis que le pourcentage total en mole de composant glycol est de 100 % en mole, et la viscosité inhérente du polyester est comprise entre 0,35 et 1,2 dL/g, telle que déterminée dans du phénol/tétrachloroéthane 60/40 (poids/poids) à une concentration de 0,25g/50ml à 25 °C.

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