Articles produced by thermoforming

Patent metadata

Field	Value
Publication number	US-9914832-B2
Application number	US-201515309711-A
Country	US
Kind code	B2
Filing date	Apr 29, 2015
Priority date	May 9, 2014
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

The present invention relates to an item produced by thermoforming, comprising:
i) from 45 to 59% by weight, based on the total weight of components i to iv, of a biodegradable polyester comprising:
i-a) from 90 to 100 mol %, based on components i-a to i-b, of succinic acid; i-b) from 0 to 10 mol %, based on components i-a to i-b, of one or more C 6 -C 20 dicarboxylic acids; i-c) from 98 to 102 mol %, based on components i-a to i-b, of 1,3-propanediol or 1,4-butanediol; i-d) from 0.05 to 1% by weight, based on components i-a to i-c, of a chain extender or branching agent;
ii) from 5 to 14% by weight, based on the total weight of components i to iv, of an aliphatic-aromatic polyester comprising:
ii-a) from 30 to 70 mol %, based on components ii-a to ii-b, of a C 6 -C 18 -dicarboxylic acid; ii-b) from 30 to 70 mol %, based on components ii-a to ii-b, of terephthalic acid; ii-c) from 98 to 100 mol %, based on components ii-a to ii-b, of 1,3-propanediol or 1,4-butanediol; ii-d) from 0.05 to 1% by weight, based on components ii-a to ii-c, of a chain extender or branching agent;
iii) from 15 to 24% by weight, based on the total weight of components i to iv, of polylactic acid; iv) from 10 to 35% by weight, based on the total weight of components i to iv, of at least one mineral filler;

where the following applies to the compounded material comprising components i to iv: the ratio of component i to component iii in the compounded material is from 2.2 to 3.2, and the MVR of the compounded material is from 1 to 10 cm 3 /10 min in accordance with DIN EN 1133-1 of Mar. 1, 2012 (190° C., 2.16 kg).

First claim

The invention claimed is:

1. An item produced by thermoforming, comprising:
i) from 45 to 59% by weight, based on the total weight of components i to iv, of a biodegradable polyester comprising:
i-a) from 90 to 100 mol %, based on components a to b of succinic acid;
i-b) from 0 to 10 mol %, based on components a to b, or one or more C 6 -C 20 dicarboxylic acids;
i-c) from 98 to 102 mol %, based on components a to b, of 1,3-propanediol or 1,4-butanediol;
i-d) from 0.05 to 1% by weight, based on components a to c, of a chain extender or branching agent;

ii) from 5 to 14% by weight, based on the total weight of components i to iv, of an aliphatic-aromatic polyester comprising:
ii-a) from 30 to 70 mol %, based on components ii-a to of a C 6 -C 18 -dicarboxylic acid;
ii-b) from 30 to 70 mol %, based on components ii-a to ii-b, of terephthalic acid;
ii-c) from 98 to 100 mol %, based on components ii-a to ii-b, of 1,3-propanediol or 1,4-butanediol;
ii-d) from 0.05 to 1% by weight, based on components a to c, of a chain extender or branching agent;

iii) from 15 to 24% by weight, based on the total weight of components i to iv, of polylactic acid;
iv) from 10 to 35% by weight, based on the total weight of components i to iv, of at least one mineral filler;
where the following applies to the compounded material comprising components i to iv:
the ratio of component i to component iii in the compounded material is from 2.2 to 3.2, and the MVR of the compounded material is from 1 to 10 cm 3 /10 min in accordance with DIN EN 1133-1 of Mar. 1, 2012 (190° C., 2.16 kg).

2. The item according to claim 1 , where the ratio of component i to component iii is from 2.5 to 3.1.

3. The item according to claim 1 , where the MVR of polyester i is from 1 to 10 cm 3 /10 min in accordance with DIN EN 1133-1 of Mar. 1, 2012 (190° C., 2.16 kg).

4. The item according to claim 1 , where the MVR of polyester ii is from 0.8 to 6 cm 3 /10 min in accordance with DIN EN 1133-1 of Mar. 1, 2012 (190° C., 2.16 kg).

5. The item according to claim 1 , where the MVR of polyester iii is from 1 to 10 cm 3 /10 min in accordance with DIN EN 1133-1 of Mar. 1, 2012 (190° C., 2.16 kg).

6. The item according to claim 1 , which comprises at least 20% by weight of a mineral filler iv, based on the total weight of components i to iv.

7. The item according to claim 5 where the filler iv is talc powder.

8. The item according to claim 1 with HDT-B temperature of from 85 to 105° C. in accordance with DIN EN ISO 75-2:2004-9.

9. A microwave tableware which comprises the item according to claim 1 .

10. A lid of cup for hot drinks which comprises the item according to claim 1 .

Assignees

• Basf Se

Inventors

• Lehenmeier Maximilian
• Skupin Gabriel
• Bussmann Martin

Classifications

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• B65D75/36

  one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages {, the recess or recesses being preformed (B65D73/0057, B65D73/0092 take precedence)} · CPC title

• C08L2201/08

  Stabilised against heat, light or radiation or oxydation · CPC title

• C08L67/04

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title