Resin composition and method for producing the same

Details Resin composition and method for producing the same Resin composition and method for producing the same

C - Chemistry, Metallurgy

08

L

C08L 29/04 (2006.01) B32B 27/30 (2006.01) B65D 1/00 (2006.01) C08J 5/18 (2006.01) C08K 5/098 (2006.01) C08L 23/08 (2006.01)

Patent

CA 2473980

The present invention is directed to a resin composition superior in barrier properties and also superior in flexibility, secondary processability and interlayer adhesiveness. The present invention is also directed to an environmentally friendly method for producing a resin composition, the method releasing no carboxylic acid such as acetic acid to the peripheral environment. The invention provides an EVOH resin composition (F) which has a content of an alkali metal salt (A) , in terms of the alkali metal, of 0.1 to 20 µmol/g and a content of a carboxylic acid or its salt (C), in terms of carboxylate radical, of 2 µmol/g or less and which has an ethylene content of 5 to 60 mol% and a saponification degree of from 80 to 99 mol%. In addition, the invention provides a resin composition comprising the EVOH resin composition (F) and an EVOH having an ethylene content of 5 to 60 mol% and a degree of saponification of 99.2 to 100 mol%.

La présente invention concerne une résine possédant des propriétés barrière ainsi qu'une flexibilité, une capacité de transformation secondaire et une adhésivité intercouches supérieures. La présente invention a également trait à une méthode écologique de production d'une résine, la méthode n'entraînant aucun rejet d'acides carboxyliques tel que l'acide acétique dans le milieu environnant. L'invention permet d'obtenir une résine d'EVOH (F) dont la teneur en un métal alcalin, présent sous forme de sel (A), est de 0,1 à 20  mol/g, la teneur en un acide carboxylique ou son sel (C), en termes de radical carboxylate, de 2  mol/g ou moins, et la teneur en éthylène, de 5 à 60 % en mol, et dont le degré de saponification se situe entre 80 et 90 % en mol. En outre, l'invention procure une résine composée la résine d'EVOH (F) et un EVOH dont la teneur en éthylène est de 5 à 60 % en mol, et le degré de saponification, de 99,2 à 100 % en mol.

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