Polyamide compositions and processes
AssigneeInvista North America S.A R.L.
InventorsMauro Zaltieri, Charles Richard Langrick
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Abstract
A polyamide comprising a nylon and a polyetheramine. The polyetheramine can have a molecular weight of at least 1500 an Amine Hydrogen Equivalent Weight (AHEW) of less than 10 percent higher than the idealized AHEW for the polyetheramine. The polyamide may have a moisture regain ranging from about 10% to about 30%.
Claims54
A polyamide, comprising a nylon and a polyetherdiamine, wherein the polyetherdiamine is present in an amount ranging from about 1% to about 20% by weight, the polyetherdiamine having a weight average molecular weight of at least 1500 and an Amine Hydrogen Equivalent Weight (AHEW) of less than 10 percent higher than the idealized AHEW for the polyetherdiamine, wherein the AHEW is defined as the weight average molecular weight of the polyetherdiamine divided by the number of active hydrogen per molecule, and wherein the number of active amine hydrogen per molecule is determined using the procedure described in ISO 9702.
The polyamide of any preceding claim, wherein the polyetherdiamine is present in an amount ranging from about 1% to about 20% by weight.
A process for producing a polyamide, comprising:
- contacting a diacid, a polyetherdiamine, and any or all of nylon salt, aminoacid or lactam to form a mixture;
- and
- heating the mixture in a closed vessel to a temperature and autogenous pressure sufficient to polymerize the mixture and form a polyamide.
Dependencies are inferred from the claim text.