Cellulose ester blends

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 1/10 (2006.01) C08L 1/12 (2006.01) C08L 67/00 (2006.01)

Patent

CA 2162490

This invention relates to a blend comprising (a) 2 % to 98 % by weight of at least one ester of cellulose comprising an alkanoyl chain having from 1 to 10 carbon atoms, and having a D.S. of 2.3 to 3.0, and an inherent viscosity of 0.2 to 3.0 deciliters/gram as measured at a temperature of 25°C for a 0.5 g sample in 100 ml of a 60/40 parts by weight solution of phenol/tetrachloroethane, and (b) 98 % to 2 % by weight of at least one ester of cellulose comprising an alkanoyl chain having from 1 to 10 carbon atoms, and having a D.S. of 1.5 to 2.2, and an inherent viscosity of 0.2 to 3.0 deciliters/gram as measured at a temperature of 25°C for a 0.5 g sample in 100 ml of a 60/40 parts by weight solution of phenol/tetrachloroethane, said percentages being based on the weight of component (a) plus component (b).

L'invention se rapporte à un mélange comprenant: (a) 2 à 98 % en poids d'au moins un ester de cellulose, contenant une chaîne alcanoyle ayant 1 à 10 atomes de carbone, et comportant un degré de substitution compris entre 2,3 et 3,0, et une viscosité inhérente de 0,2 à 3,0 décilitres par gramme, mesurée à une température de 25 DEG C pour un échantillon de 0,5 gramme dans 100 ml d'une solution de 60/40 parties en poids de phénol/tétrachloroéthane; et (b) 98 à 2 % en poids d'au moins un ester de cellulose, contenant une chaîne alcanoyle ayant 1 à 10 atomes de carbone, et comportant un degré de substitution compris entre 1,5 et 2,2, et une viscosité inhérente de 0,2 à 3,0 décilitres par gramme mesurée à une température de 25 DEG C pour un échantillon de 0,5 gramme dans 100 ml d'une solution de 60/40 parties en poids de phénol/tétrachloroéthane; ces pourcentages étant calculés sur la base de la somme des poids du constituant (a) et du constituant (b).

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