Patent · US Active

Hydrolysis resistant polyamides

US11459458B2 · kind B2 · utility

1Cited by

34References

20Claims

0Family size

Assignee

Ascend Performance Materials Operations LLC · US

Inventors

Bradley J. Sparks · Richmond, US
Ryan M. Hensarling · Floridatown, US

Key dates

Filing date	Feb 12, 2020
Grant date	Oct 4, 2022
Priority date	—
Expiry date	Nov 14, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/025
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A hydrolysis resistant polyamide composition comprising from 50 wt % to 80 wt % polyamide polymer having a theoretical amine end group content of at least 55 μeq/gram; and from 25 wt % to 60 wt % glass fibers. The weight ratio of polyamide polymer to glass fibers ranges from 0.5:1 to 4.0:1. The polyamide composition comprises less than 0.06 wt % copper; and/or from 1 ppb to 0.24 wt % non-copper metal halide compound. The polyamide composition, when hydrolysis aged for 500 hours at 130° C., demonstrates an impact resilience greater than 40 kJ/m2, as measured at 23° C.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.