Hybrid foam

Patent metadata

Field	Value
Publication number	US-9850360-B2
Application number	US-201013266590-A
Country	US
Kind code	B2
Filing date	May 11, 2010
Priority date	May 11, 2009
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

The invention relates to highly elastic polyurethane foams which are suitable as functional materials having thermally insulating properties.

First claim

The invention claimed is:

1. An elastic hybrid foam, comprising:
a) at least one thermoplastic polyurethane having Shore A hardness of 20 to 70;
b) at least one hollow polymer body having a TMA density of 2-10 kg/m 3 ;
c) optionally at least one additional physical blowing agent, chemical blowing agent, or both; and
d) optionally, at least one auxiliary and at least one additive,
wherein the hybrid foam is at least monoaxially stretched,
wherein said hybrid foam is has a substantially closed-celled structure, and
wherein said hybrid foam has a stress at 100% elongation of less than 0.25 MPa and at 200% elongation of less than 0.35 MPa.

2. The hybrid foam of claim 1 , which is biaxially stretched.

3. An elastic hybrid foam, comprising:
a) at least one thermoplastic polyurethane having Shore A hardness of 20 to 70;
b) at least one hollow polymer body having a TMA density of 2-10 kg/m 3 ;
c) optionally additional physical blowing agent, chemical blowing agent, or both; and
d) optionally, at least one auxiliary, at least one additive, or both,
wherein the at least one hollow polymer body is neither physically nor chemically bound to the surrounding thermoplastic polyurethane,
wherein said hybrid foam is has a substantially closed-celled structure, and
wherein said hybrid foam has a stress at 100% elongation of less than 0.25 MPa and at 200% elongation of less than 0.35 MPa.

4. The hybrid foam or claim 1 , wherein the foam comprises from 1 to 20% by weight of the hollow polymer body filled with at least one blowing agent and from 0 to 5% by weight of the physical blowing agent, chemical blowing agent, or both, based on a total weight of the thermoplastic polyurethane, the hollow polymer body filled with at least one blowing agent, and the physical blowing agent, chemical blowing agent, or both, which add up to 100% by weight based on from 75 to 99% by weight of the thermoplastic polyurethane.

5. The hybrid foam of claim 1 , wherein an elongation at break in accordance with DIN 53504 is at least 200%.

6. The hybrid foam of claim 1 , wherein the thermoplastic polyurethane comprises a release agent.

7. The hybrid foam of claim 1 , wherein the thermoplastic polyurethane comprises a plasticizer.

8. The hybrid foam of claim 1 , wherein at least 80% of the cells making up the hybrid foam are closed.

9. The hybrid foam of claim 1 , wherein the hollow polymer body is filled with at least one blowing agent.

10. The hybrid foam of claim 1 , wherein the hybrid foam is at least monoaxially stretched in a ratio of at least 2:1.

11. The hybrid foam of claim 3 , wherein the hollow polymer body is filled with at least one blowing agent.

12. The hybrid foam of claim 7 , wherein the plasticizer is at least one selected from the group consisting of a phthalate, a benzoate, a glycerol ester, and an ester of citric acid.

13. The hybrid foam of claim 8 , wherein the foam cells have a cell diameter of less than 200 μm.

14. The hybrid foam of claim 1 , wherein the at least one hollow polymer body having a TMA density of 2-7 kg/m 3 .

15. The hybrid foam of claim 3 , wherein the at least one hollow polymer body having a TMA density of 2-7 kg/m 3 .

Assignees

• Prissok Frank
• Mayer Steffen
• Aepker Tanja
• Grever Maike
• Kranzusch Daniela
• Niemann Marlene
• Felix Florian
• Basf Se

Inventors

• Prissok Frank
• Mayer Steffen
• Aepker Tanja
• Grever Maike
• Kranzusch Daniela
• Niemann Marlene
• Felix Florian

Classifications

• C08J9/06 Primary

  by a chemical blowing agent · CPC title

• C08J2375/04

  Polyurethanes · CPC title

• C08J9/32

  from compositions containing microballoons, e.g. syntactic foams · CPC title

• B29C70/66

  the filler comprising hollow constituents, e.g. syntactic foam · CPC title

• C08J2205/06

  Flexible foams · CPC title