Polyamide compositions and articles made therefrom

Abstract

The present disclosure relates to compositions and compounded compositions including polyamide and a maleated polyolefin, articles formed from the same such as extruded or molded articles, and methods of making the compositions and articles. A composition includes a condensation polyamide that is at least 30 wt % of the composition and that is the predominant polyamide in the composition. The composition also includes from ≥10 wt % to ≤50 wt % of a maleic anhydride grafted polyolefin having a grafted maleic anhydride incorporation of ≥0.05 to ≤1.5 wt % based on total weight of the maleated polyolefin.

What is claimed is: 
     
         1 . A condensation polyamide composition, a reaction product thereof, or a compounded polyamide composition including one or both of the same, the condensation polyamide composition comprising:
 a condensation polyamide that is nylon 66 and that is at least 30 wt % of the condensation polyamide composition, wherein the condensation polyamide is the predominant polyamide in the condensation polyamide composition; and   a maleated polyolefin that is from ≥10 wt % to ≤50 wt % of the condensation polyamide composition, wherein the maleated polyolefin comprises maleic anhydride grated onto a polyolefin backbone, the maleated polyolefin having a grafted maleic anhydride incorporation of ≥0.05 wt % to ≤1.5 wt % based on a total weight of the maleated polyolefin;   wherein the reaction product of the condensation polyamide composition comprises polyamide-polyolefin copolymer formed from at least partial reaction of the condensation polyamide and the maleated polyolefin.   
     
     
         2 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , wherein the maleated polyolefin is 20 wt % to 30 wt % of the condensation polyamide composition. 
     
     
         3 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , wherein the condensation polyamide composition further comprises a polyamide copolymer chosen from nylon 66/6T, nylon 66/DI, nylon 66/D6, nylon 66/DT, nylon 66/610, nylon 66/612, or a combination thereof, wherein the polyamide copolymer is ≥15 wt % to ≤50 wt % of the condensation polyamide composition. 
     
     
         4 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 3 , wherein the polyamide copolymer is PA66/DI. 
     
     
         5 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , wherein the nylon 66 has an AEG of ≥65 milliequivalents per kg (meq/kg) to ≤130 meq/kg. 
     
     
         6 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , wherein the nylon 66 has an AEG of ≥70 milliequivalents per kg (meq/kg) to ≤125 meq/kg. 
     
     
         7 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , wherein the nylon 66 has an RV of 35-100 as determined using formic acid via ASTM D789. 
     
     
         8 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , wherein the nylon 66 has an RV of 40-80 as determined using formic acid via ASTM D789. 
     
     
         9 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , that is free of glass fibers. 
     
     
         10 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , having a melting point of 258° C. to 262° C. as determined via ISO 11357. 
     
     
         11 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , having a melting point of 262° C. as determined via ISO 11357. 
     
     
         12 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , having a tensile stress at break of 40 MPa to 150 MPa as determined from a dry-as-molded specimen using ISO 527. 
     
     
         13 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , having a tensile stress at break of 40 MPa to 60 MPa as determined from a dry-as-molded specimen using ISO 527. 
     
     
         14 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , having a Charpy notched impact strength at −30° C. of 60 KJ/m 2  to 100 KJ/m 2  as determined from a dry-as-molded specimen using ISO 179/1 eA. 
     
     
         15 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , having a Charpy notched impact strength at −30° C. of 80 KJ/m 2  to 90 KJ/m 2  as determined from a dry-as-molded specimen using ISO 179/1 eA. 
     
     
         16 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , having a tensile modulus of 1168 MPa to 1903 MPa as determined from a dry-as-molded specimen using ISO 527. 
     
     
         17 . The condensation polyamide composition, reaction product thereof, or compounded polyamide composition of  claim 1 , having a tensile modulus of 1552 MPa to 1903 MPa as determined from a dry-as-molded specimen using ISO 527. 
     
     
         18 . The compounded polyamide composition of  claim 1  comprising:
 the condensation polyamide composition and/or reacted product thereof, wherein the condensation polyamide is at least 30 wt % of the compounded polyamide composition; and 
 a chain extender that is ≥0.05 wt % to ≤1.5 wt % of the compounded polyamide composition. 
 
     
     
         19 . The compounded polyamide composition of  claim 18 , wherein the chain extender comprises a maleic anhydride-polyolefin alternating copolymer. 
     
     
         20 . A condensation polyamide composition, a reaction product thereof, or a compounded polyamide composition including one or both of the same, the condensation polyamide composition comprising:
 a condensation polyamide that is nylon 66 having an AEG of ≥70 milliequivalents per kg (meq/kg) to ≤125 meq/kg, an RV of 40-80 as determined using formic acid via ASTM D789 and that is at least 30 wt % of the condensation polyamide composition, wherein the condensation polyamide is the predominant polyamide in the condensation polyamide composition;   a polyamide copolymer chosen from nylon 66/6T, nylon 66/DI, nylon 66/D6, nylon 66/DT, nylon 66/610, nylon 66/612, or a combination thereof, wherein the polyamide copolymer is ≥15 wt % to ≤50 wt % of the condensation polyamide composition; and   a maleated polyolefin that is from ≥20 wt % to ≤30 wt % of the condensation polyamide composition, wherein the maleated polyolefin comprises maleic anhydride grated onto a polyolefin backbone, the maleated polyolefin having a grafted maleic anhydride incorporation of ≥0.05 wt % to ≤1.5 wt % based on a total weight of the maleated polyolefin;   wherein the condensation polyamide composition, reaction product thereof, or compounded polyamide composition is free of glass fibers;   wherein the condensation polyamide composition, reaction product thereof, or compounded polyamide composition has
 a melting point of 262° C. as determined via ISO 11357, 
 a tensile stress at break of 40 MPa to 60 MPa as determined from a dry-as-molded specimen using ISO 527, 
 a Charpy notched impact strength at −30° C. of 80 KJ/m 2  to 90 KJ/m 2  as determined from a dry-as-molded specimen using ISO 179/1 eA, and 
 a tensile modulus of 1552 MPa to 1903 MPa as determined from a dry-as-molded specimen using ISO 527; 
   wherein the reaction product of the condensation polyamide composition comprises polyamide-polyolefin copolymer formed from at least partial reaction of the condensation polyamide and the maleated polyolefin; and   wherein as compared to a control having an otherwise identical composition except containing less than 0.05 wt % of the maleated polyolefin, the condensation polyamide composition, reaction product thereof, or compounded polyamide composition is characterized by superior resistance to at least one selected from cold-temperature cracking, urea exposure, fuel exposure, oil exposure, high-temperature exposure, hydrolysis, glycolysis, and salt exposure.