| 摘要 |
A polymer composition comprises an olefin polymer, a carboxylic acid compound which contains at least three carbon atoms together with a quaternary ammonium salt wherein at least one substituent on the nitrogen atom is an alkyl group containing at least eight carbon atoms. The olefin polymer may be an ethylene polymer, a propylene polymer or copolymers thereof. The carboxylic acid may be an aliphatic diacid such as succinic acid. The quaternary ammonium salt may be a halide or sulphate. The quaternary ammonium group generally contains two or preferably only one alkyl group having at least eight carbon atoms. Other substituents in the quaternary ammonium group can be methyl, benzyl or poly (alkylene oxide) groups, which may be substituted. The polymer composition may be obtained by conventional powder blending or melt blending techniques. Preferred polymer compositions have an increased clarity and a reduced level of haze compared to the polymer alone or the polymer containing only the carboxylic acid. |
