Patent ID: 11959196
Assignee: PBI PERFORMANCE PRODUCTS, INC.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D  C | IPC C  D

Claim 0:
1. A textile fiber for a garment comprises a polybenzimidazole (PBI) polymer with a phosphoric acid pick-up (APU) in the range of 4-20% resulting in a phosphonated PBI and having a LOI (Limiting Oxygen Index) per ASTM2863 of ≥47%, wherein the fiber has a denier from 0.1 to 1.0 denier per filament (dpf), wherein the PBI polymer is selected from the group consisting of poly-2,2′-(biphenylene-2″2′″)-5,5′-bibenzimidazole; poly-2,2′-(biphenylene-4″4′″)-5,5′-bibenzimidazole; poly-2,2′(1″,1″,3″trimethylindanylene)-3″5″-p-phenylene-5,5′-bibenzimidazole: 2,2′-(m-phenylene)-5,5′-bibenzimidazole/2,2-(1″,1″,3″-trimethylindanylene)-5″,3″-(p-phenylene)-5,5′-bibenzimidazole copolymer: 2,2′-(m-phenylene)-5,5-bibenzimidazole-2,2′-biphenylene-2″2′″-5,5′-bibenzimidazole copolymer: poly-2,2′-(furylene-2″,5″)-5,5′-bibenzimidazole; poly-2,2′-(naphthalene-1″,6″) -5,5′-bibenzimidazole; poly-2,2′-(naphthalene-2″,6″)-5,5′-bibenzimidazole: poly-2,2′ameylene -bibenzimidazole: poly-2,2′-octamethylene-5,5-bibenzimidazole; (m-phenylene)-diimidazobenzene; pol -2,2′-cyclohexenyl-5,5′-bibenzimidazole; poly -2,2′-(m-phenylene)-5,5′-di(benzimidazole)ether; poly-2,2′-(m-phenylene) -5,5′-di(benzimidazole)sulfide: poly-2,2′-(m-phenylene)-5,5′-di(benzimidazole)sulfone; poly-2,2′-(m-phenylene)-5,5′-di(benzimidazole)methane; poly-2,2″-(m-phenylene)-5,5″-di(benzimidazole)propane-2,2; and poly-ethylene-1,2-2,2″-(m-phenylene)-5,5″-dibenzimidazole)ethylene-1,2 where the double bonds of the ethylene croups are intact in the PBI polymer.