FIRE RETARDANT NYLON FIBERS AND METHODS FOR MAKING THEM

• US 20190309443A1
• Filed: 06/17/2019
• Published: 10/10/2019
• Est. Priority Date: 02/09/2015
• Status: Active Grant

• Current Assignee: Brookwood Companies Incorporated (Hallwood Trust)
• Original Assignee: Brookwood Companies Incorporated (Hallwood Trust)
• Inventors: BROOKMAN, Amber Marie, CAPWELL, David Alden, Hsu, Jen-Yee
• Granted Patent: US 10,883,199 B2
• Time in Patent Office: Days
• CPC Class Codes: D01F 1/07 for making fire- or flame-proof filaments
• CPC Class Codes: D01F 6/60 from polyamides from polyamino acids or polypeptides D01F6/68
• CPC Class Codes: D01F 6/90 of polyamides
• CPC Class Codes: D10B 2331/02 polyamides D10B2331/08 takes precedence

Abstract

Provided are nylon fibers having fire-retardant agents dispersed therein and methods for manufacturing such fibers. The fire-retardant agents may comprise Tris(tribromophenyl) triazine and/or antimony trioxide. Fabrics made from such fibers are also provided.

Claims

1. A fire-retardant nylon fiber having dispersed within the internal regions thereof an amount of a fire-retardant composition comprising:

(i) from about 0.1% to about 10% brominated organic fire-retardant; and

(ii) from about 0.1% to about 10% synergist,

wherein a major portion thereof is Nylon-6 polymer and/or Nylon-6,6 polymer.

2. The fire-retardant nylon fiber of claim 1, comprising at least about 50% Nylon-6 polymer and/or Nylon-6,6 polymer.

3. The fire-retardant nylon fiber of claim 1, wherein the fiber is spun from a melt comprising molten nylon polymer homogeneous mixed with said fire-retardant composition.

4. The fire-retardant nylon fiber of claim 1, wherein the fiber comprises a tensile strength within 20% of the tensile strength of an otherwise identical nylon fiber that does not comprise said fire retardant composition.

5. The fire-retardant nylon fiber of claim 1, wherein the brominated organic fire-retardant is selected from the group consisting of:

tris(tribromophenyl) triazine;

tris(tribromoneopentyl)phosphate;

pentabromobenzyl acrylate (PBB-MA);

poly(pentabromobenzyl acrylate) (PBB-PA);

brominated trimethylphenyl indan; and

tetrabromobi sphenyl A-bis(2,3-dibromopropyl ether).

6. The fire-retardant nylon fiber of claim 1, wherein the brominated organic fire-retardant is a brominated aryl fire-retardant.

7. The fire-retardant nylon fiber of claim 1, wherein the brominated organic fire-retardant is tris(tribromophenyl) triazine.

8. The fire-retardant nylon fiber of claim 1, further comprising from about 0.1% to about 10% brominated inorganic fire-retardant.

9. The fire-retardant nylon fiber of claim 8, wherein the brominated inorganic fire-retardant is a phosphorous-based fire-retardant.

10. The fire-retardant nylon fiber of claim 8, wherein the brominated inorganic fire-retardant is tris(tribromoneopentyl)phosphate.

11. The fire-retardant nylon fiber of claim 1, wherein the synergist is selected from the group consisting of:

antimony trioxide, antimony pentoxide, sodium antimonite, calcium metaborate, aluminum hydroxide (ATH), and barium borate.

12. The fire-retardant nylon fiber of claim 1, wherein the synergist is antimony trioxide.

13. The fire-retardant nylon fiber of claim 1, wherein the fire-retardant composition comprises:

(i) about 0.1% to about 10% tris(tribromophenyl) triazine; and

(ii) about 0.1% to about 10% antimony trioxide.

14. The fire-retardant nylon fiber of claim 13, wherein the antimony trioxide and the tris(tribromophenyl) triazine are present in an amount sufficient to provide a weight ratio of elemental Sb and Br (Sb:

Br) of from about 1;

3 to about 1;

10, and wherein the aggregate weight of elemental Sb and Br in the fiber is from about 0.1% to about 20% by weight of the total weight of the fiber.

15. The fire-retardant nylon fiber of claim 13, wherein the antimony trioxide and the tris(tribromophenyl) triazine are present, collectively, in an amount from about 0.1% to about 20% by weight based on the weight of the fiber.

16. The fire-retardant nylon fiber of claim 13, wherein the antimony trioxide and the tris(tribromophenyl) triazine are present in the fiber in a weight ratio of from about 2:

1 to about 5;

1.

17. The fire-retardant nylon fiber of claim 13, wherein the antimony trioxide and the tris(tribromophenyl) triazine are present in the fiber in a weight ratio of from about 3:

1 to about 4;

1.

18. The fire-retardant nylon fiber of claim 13, further comprising about 0.1% to about 10% tris(tribromoneopentyl)phosphate.

19. The fire-retardant nylon fiber of claim 13, comprising at least about 50% Nylon-6 polymer and/or Nylon-6,6 polymer.

20. A woven fabric comprising a plurality of fire-retardant nylon fibers of claim 1.