CUT-RESISTANT THERMOPLASTIC COMPOSITION

• US 20200131340A1
• Filed: 04/06/2018
• Published: 04/30/2020
• Est. Priority Date: 04/06/2017
• Status: Abandoned Application

• Current Assignee: BASF SE
• Original Assignee: BASF SE
• Inventors: Kujawski, Mark Paul
• Application Number:
  US16/500,828
• Publication Number:
  US 20200131340A1
• Time in Patent Office: Days
• CPC Class Codes: C08K 2201/005 Additives being defined by their particle size in general
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08K 7/18 inorganic
• CPC Class Codes: C08L 59/02 Polyacetals containing polyoxymethylene sequences only
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 67/06 Unsaturated polyesters
• CPC Class Codes: C08L 75/08 from polyethers

Abstract

A cut-resistant thermoplastic composition comprises a polymer and ceramic microspheres. The ceramic microspheres have a D90 particle size of from about 20 to about 80 μm, a D50 particle size of from about 1 to about 15 μm, and/or a D10 particle size of about 1 μm. The ceramic microspheres are present in the cut-resistant thermoplastic composition in an amount of from about 5 to about 50 weight percent, based on 100 parts by weight of said thermoplastic composition.

Claims

1. A cut-resistant thermoplastic composition cc uprising:

(A) a polymer; and

(B) ceramic microspheres having a D90 particle size of from about 20 to about 80 μ

m, a D50 particle size of from about l to about 15 μ

m, and/or a D10 particle size of about 1 μ

m, and present in an amount of from about 5 to about 50 weight percent, based on 100 parts by weight of said thermoplastic composition;

wherein said thermoplastic composition has a cut--resistance gradient of greater than about 15%.

2. A cut-resistant thermoplastic composition as set forth in claim 1 wherein said ceramic microspheres have a D90 particle size of from about 5 to about 35 μ

m.

3. A cut-resistant thermoplastic composition as set forth in claim 1 wherein said ceramic microspheres are present in an amount of from about 15 to about 35 weight percent, based on 100 parts by weight of said thermoplastic composition.

4. A cut-resistant thermoplastic composition as set forth in claim 1 wherein said ceramic microspheres have a specific gravity of from about 2.2 to about 2.6 g/cm³.

5. A cut-resistant thermoplastic composition as set forth in claim 1 wherein said ceramic microspheres have a crush strength of greater than about 4,200 kg/cm².

6. A cut-resistant thermoplastic composition as set forth in claim 1 wherein said polymer is selected from a thermoplastic polyurethane, a polyoxymethylene, a polyalkylene terephthalate, and combinations thereof.

7. A cut-resistant thermoplastic composition as set forth in claim 6 comprising said thermoplastic polyurethane selected from the group of polyether-based thermoplastic polyurethanes, polyester-based thermoplastic polyurethanes, and combinations thereof.

8. A cut-resistant thermoplastic composition as set forth in claim 7 wherein said thermoplastic polyurethane is a polyether-based thermoplastic polyurethane.

9. A cut-resistant thermoplastic composition as set forth in claim 7 wherein said thermoplastic polyurethane has a weight average molecular weight of greater than about 50,000 g/mol.

10. A cut-resistant thermoplastic composition as set forth in claim 7 wherein said thermoplastic polyurethane has a tensile strength of from about 2,000 to about 80,000 psi at 23°

C. as determined by ASTM D412.

11. A cut-resistant thermoplastic composition as set forth in claim 6 comprising said polyoxymethylene.

12. A cut-resistant thermoplastic composition as set forth in claim 11 wherein said polyoxymethylene has a weight average molecular weight of greater than about 25,000 g/mol.

13. A cut-resistant thermoplastic composition as set forth in claim 6 comprising said polyalkylene terephthalate wherein said polyalkylene terephthalate is selected from polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and combinations thereof.

14. A cut-resistant thermoplastic composition as set forth in claim 13 comprising polybutylene terephthalate.

15. A cut-resistant thermoplastic composition as set forth in claim 13 wherein said polyalkylene terephthalate has a weight average molecular weight of greater than about 25,000 g/mol.

16. A cut-resistant thermoplastic composition as set forth in claim 1 having a flexural modulus of less than about 400,000 psi at 23°

C. as determined by ASTM D790.

17. A cut-resistant thermoplastic composition as set forth in claim 1 having a drag-force gradient of greater than about 15%.

18. A cut-resistant thermoplastic composition as set forth in claim 1 having specific gravity of from about 1.05 to about 1.95 g/cm³.

19. A conveyor belt comprising said cut-resistant thermoplastic composition set forth in claim 1.

20. A method of cutting an object on an article formed from the cut-resistant thermoplastic composition set forth claim 1, said method comprising the steps of:

(1) providing the article comprising the thermoplastic composition; and

(2) cutting the object on the article with a blade.