BIODEGRADABLE POLYESTER MIXTURE

摘要

The invention relates to a biodegradable polyester mixture comprising:
i) 71 to 91 wt %, based on the total weight of components i and ii, of a polyester I constructed from:
a-1) 40 to 70 wt %, based on the total weight of components a and b, of an aliphatic C9-C16 dicarboxylic acid or of a C9-C16 dicarboxylic acid derivative;b-1) 30 to 60 wt %, based on the total weight of components a and b, of terephthalic acid or of a terephthalic acid derivative;c-1) 98 to 100 wt %, based on the total weight of components a and b, of a C3-C6 diol;d-1) 0 to 2 wt %, based on the total weight of components a and b, of an at least trihydric alcohol;e-1) 0 to 2 wt %, based on the total weight of components a to e, of a chain extender, andii) 9 to 29 wt %, based on the total weight of components i and ii, of a polyester II constructed from:
a-2) 40 to 70 wt %, based on the total weight of components a and b, of an aliphatic C4-C6 dicarboxylic acid or of a C4-C6 dicarboxylic acid derivative;b-2) 30 to 60 wt %, based on the total weight of components a and b, of terephthalic acid or of a terephthalic acid derivative;c-2) 98 to 100 wt %, based on the total weight of components a and b, of a C3-C6 diol;d-2) 0 to 2 wt %, based on the total weight of components a and b, of an at least trihydric alcohol;e-2) 0 to 2 wt %, based on the total weight of components a to e, of a chain extender.

主权项

1. A biodegradable polyester mixture comprising:
i) 71 to 91 wt %, based on the total weight of components i and ii, of a polyester I constructed from:
a-1) 40 to 70 mol %, based on components a and b, of an aliphatic C9-C18 dicarboxylic acid or of a C9-C18 dicarboxylic acid derivative;b-1) 30 to 60 mol %, based on components a and b, of terephthalic acid or of a terephthalic acid derivative;c-1) 98 to 100 mol %, based on components a and b, of a C3-C6 diol;d-1) 0 to 2 wt %, based on the total weight of components a to e, of an at least trihydric alcohol;e-1) 0 to 2 wt %, based on the total weight of components a to e, of a chain extender, and ii) 9 to 29 wt %, based on the total weight of components i and ii, of a polyester II constructed from:
a-2) 40 to 70 mol %, based on components a and b, of an aliphatic C4-C6 dicarboxylic acid or of a C4-C6 dicarboxylic acid derivative;b-2) 30 to 60 mol %, based on components a and b, of terephthalic acid or of a terephthalic acid derivative;c-2) 98 to 100 mol %, based on components a and b, of a C3-C6 diol;d-2) 0 to 2 wt %, based on the total weight of components a and b, of an at least trihydric alcohol;e-2) 0 to 2 wt %, based on the total weight of components a to e, of a chain extender.