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US 2020/0062958 A1Published application
Process and formulation for producing a polyamide having low caprolactam concentration and specific relative viscosity
AssigneeAscend Performance Materials Operations LLC
InventorsJacob Ray, Chris Schwier, Douglas Claire Hoffman, Muhamad Fouad
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Abstract
A base polyamide composition comprising a nylon mixture having caprolactam units from 1 wppb to 50 wppm catalyst composition; and greater than 0.75 wt % residual caprolactam, wherein the base polyamide composition has a delta end group level ranging from 30 neq/gram to 90 neq/gram.
Claims20
A process for producing a polyamide composition having a low residual caprolactam concentration, the process comprising the steps of:
- (a) providing a base polyamide composition comprising:
- a nylon mixture having caprolactam units;
- from 1 wppb to 50 wppm of a catalyst composition;
- and
- residual caprolactam, and having an initial residual caprolactam concentration and an initial relative viscosity;
- (b) processing the base polyamide composition to form the final polyamide composition having a final residual caprolactam concentration and a final relative viscosity.
3 more elements
A base polyamide composition comprising:
- a nylon mixture having caprolactam units;
- from 1 wppb to 50 wppm catalyst composition;
- and
- greater than 0.75 wt % residual caprolactam;
- wherein the base polyamide composition has a delta end group level ranging from 30 μeq/gram to 90 μeq/gram.
2 more elements
A film formed from a final polyamide composition comprising:
- polyamide monomers;
- less than 0.75 wt % residual caprolactam,
- wherein the final polyamide composition has a delta end group level ranging from 30 μeq/gram to 90 μeq/gram and a melting point ranging from 205° C. to 255° C.,
- wherein the film demonstrates:
- a puncture resistance greater than 3 J/mm as measured via ASTM F1366 (2018), an impact resistance greater than 1500 grams as measured via ASTM D1709. A (2018), and/or
- a tear resistance greater than 50 grams as measured via ASTM D1922 (2018).
3 more elements
Dependencies are inferred from the claim text.