Injection-molded article containing surface-modified silicates
The present invention relates to an injection molded article comprising: i) 27% to 87% by weight based on the total weight of the components i to iv of a polyester constructed from aliphatic dicarboxylic acids and aliphatic diols; ii) 3% to 15% by weight based on the total weight of the components i to iv of an aliphatic-aromatic polyester comprising: ii-a) 30 to 70 mol % based on the components ii-a to ii-b of a C 6 -C 18 -dicarboxylic acid; ii-b) 30 to 70 mol % based on the components ii-a to ii-b of terephthalic acid; ii-c) 99 to 100 mol % based on the components ii-a to ii-b of 1,3-propanediol or 1,4-butanediol; ii-d) 0% to 1% by weight based on the components ii-a to ii-c of a chain extender and/or branching agent; iii) 0% to 35% by weight based on the total weight of the components i to iv of polylactic acid; iv) 10% to 35% by weight based on the total weight of the components i to iv of at least one surface-modified silicate selected from the group consisting of: kaolin, muscovite, montmorillonite, talc and wollastonite.
1. An injection molded article comprising:
i) 27% to 87% by weight based on the total weight of the components i to iv of a polyester constructed from aliphatic dicarboxylic acids and aliphatic diols;
ii) 3% to 15% by weight based on the total weight of the components i to iv of an aliphatic-aromatic polyester comprising:
ii-a) 30 to 70 mol % based on the components ii-a to ii-b of a C 6 -C 18 -dicarboxylic acid;
ii-b) 30 to 70 mol % based on the components ii-a to ii-b of terephthalic acid;
ii-c) 99 to 100 mol % based on the components ii-a to ii-b of 1,3-propanediol or 1,4-butanediol;
ii-d) 0% to 1% by weight based on the components ii-a to ii-c of a chain extender and/or branching agent;
iii) 0% to 35% by weight based on the total weight of the components i to iv of polylactic acid;
iv) 10% to 35% by weight based on the total weight of the components i to iv of at least one surface-modified kaolin;
wherein the kaolin has a vinylsilane-modified surface.
2. The injection molded article according to claim 1 , wherein polyester i is a biodegradable aliphatic polyester comprising:
i-a) 90 to 100 mol % based on components i-a to i-b of succinic acid;
i-b) 0 to 10 mol % based on components i-a to i-b of one or more C 6 -C 18 -dicarboxylic acids;
i-c) 99 to 100 mol % based on the components i-a to i-b of 1,3-propanediol or 1,4-butanediol;
i-d) 0% to 1% by weight based on the components i-a to i-c of a chain extender and/or branching agent.
3. The injection molded article according to claim 1 , wherein the surface-modified kaolin has an aspect ratio of 1 to 15.
4. The injection molded article according to claim 2 , comprising 10% to 30% by weight based on the total weight of the components i to iv of polylactic acid.
5. The injection molded article according to claim 1 , comprising 0% by weight based on the total weight of the components i to iv of polylactic acid.
6. The injection molded article according to claim 1 , comprising 0.5% to 10% by weight based on the total weight of the components i to iv of a thermoplastic polyurethane.
7. The injection molded article according to claim 1 having a notched impact strength according to DIN EN 179-1/1eU:2000 of greater than 8 kJ/m 2 .
8. The injection molded article according to claim 1 having an elastic modulus according to ISO 527-3:2003 of greater than 1500 MPa.