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US 2022/0064376 A1Published application
Stain resistant polyamide polymers obtained via high end group termination
AssigneeAdvanSix Resins & Chemicals LLC
InventorsDavid J. Loy, Haoyu Liu, Timothy Bauer
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Abstract
The present disclosure provides fibers and filaments formed from polyamide polymers polymerized with dual termination of the amino and carboxyl end-groups, referred to herein as dual-terminated polyamides, or dual terminated PA. In one embodiment, the dual-terminated polyamide is considered “highly terminated” and is useful in producing stain resistant textiles such as carpet fibers, for example.
Claims16
A polyamide polymer having amine end groups and carboxyl end groups, the polyamide polymer further comprising:
- an amine end group concentration less than 20 mmol/kg;
- a carboxyl end group concentration less than 20 mmol/kg;
- and
- a formic acid viscosity (FAV) of at least 40 as measured according to ASTM D-789.
1 more element
A method of forming a polyamide polymer fiber, comprising the steps of:
- providing a polyamide polymer having amine end groups and carboxyl end groups, the polyamide polymer further comprising:
- an amine end group concentration less than 20 mmol/kg;
- a carboxyl end group concentration less than 20 mmol/kg;
- and
- a formic acid viscosity (FAV) of at least 40 as measured according to ASTM D-789;
- and
- spinning the polyamide polymer at a spinning speed of at least 2,500 m/min to form a plurality of fibers.
4 more elements
Dependencies are inferred from the claim text.