Polyamide formulations for improved noise vibration and harshness
AssigneeAscend Performance Materials Operations LLC
InventorsAvelino Lima, Jacob G. Ray, Ted Wieczorek, Kai Becker, Bradley J. Sparks, Tariq Oweimreen
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Abstract
Provided herein are polyamide compositions including one or more semi-crystalline polyamides and either an amorphous polyamide or a semi-crystalline copolyamide such as PA66/6. The provided compositions are particularly useful as vibration isolators more effective at high-temperature noise and harshness damping than conventional polyamide compositions. Also provided are methods for making the provided compositions, and articles that include the provided compositions.
Claims20
A composition comprising:
- one or more amorphous polyamides;
- one or more semi-crystalline polyamides;
- wherein the composition exhibits a maximum viscoelastic loss factor (tan(δ)) at a temperature greater than 40° C. when the composition has a moisture content less than or equal to 0.2 wt %.
A composition comprising:
- from 1 wt % to 50 wt % of a semi-crystalline PA66/6 (co)polyamide;
- from 30 wt % to 80 wt % of a material selected from the list consisting of a second semi-crystalline polyamide and an amorphous polyamide;
- wherein the composition exhibits a maximum tan(δ) at a temperature greater than 40° C. when the composition has a moisture content less than 0.2 wt %.
A composition comprising:
- a low Tg polymer with a Tg from 100° C. to 200° C., and
- a high Tg polymer with a Tg from 0° C. to 160° C.,
- wherein the composition exhibits a maximum viscoelastic loss factor (tan(δ)) at a temperature greater than 40° C. when the composition has a moisture content less than 0.2 wt %.
A connecting part, the part comprising:
- a part body for contacting a first component;
- and
- a part tab for contacting a second component to connect the first and second components,
- wherein at least one of the part body and the part tab comprise a composition comprising:
- one or more amorphous polyamides;
- and
- one or more semi-crystalline polyamides;
- wherein the part exhibits a maximum viscoelastic loss factor (tan(δ)) at a temperature greater than 40° C. when the composition has a moisture content less than 0.2 wt %.
A connecting part, the part comprising:
- a part body for contacting a first component;
- and
- a part tab for contacting a second component to connect the first and second components,
- wherein at least one of the part body and the part tab comprise a composition comprising:
- from 1 wt % to 50 wt % of a semi-crystalline PA66/6 (co)polyamide;
- from 30 wt % to 80 wt % of a material selected from the list consisting of a second semi-crystalline polyamide and an amorphous polyamide;
- wherein the part exhibits a maximum tan(δ) at a temperature greater than 40° C. when the composition has a moisture content less than 0.2 wt %.
A process for connecting a first component to a second component, the process comprising:
- providing a connecting part comprising a part body and a part tab;
- contacting the part body with the first component;
- and
- contacting the part tab with the second component to connect first and second components,
- wherein the part exhibits a maximum tan(δ) at a temperature greater than 40° C. when the composition has a moisture content less than 0.2 wt %.
Dependencies are inferred from the claim text.