Compositions, methods and articles produced by compounding polyamides with olefin-maleic anhydride polymers
View Patent ↗The disclosure of the present application provides compositions and methods of compounding polyamides comprising the steps of forming a polyamide mixture, comprising a polyamide with an olefin maleic anhydride copolymer, and compounding the polyamide mixture at its processing temperature. Compounded polyamides derived from recycled nylon and other recycled polyamides and methods for preparing the compounded polyamides are described.
1. A compounded polymer comprising:
(a) a polyamide; and
(b) an olefin-maleic anhydride polymer copolymerized from maleic anhydride and an olefin selected from the group consisting of ethylene, propylene, isobutylene, butene-1, octene, butadiene, isoprene, hexene, dodecene, dodecene-1, and tetradecene; wherein the compounded polymer is formed by compounding the polyamide and the olefin-maleic anhydride copolymer and wherein the olefin-maleic anhydride copolymer has a molar ratio of maleic anhydride to the olefin of about 1:10 to about 10:1 and the olefin-maleic anhydride copolymer is present at a concentration of about 0.01% to about 5.0% w/w of the compounded polymer.
2. The compounded polymer of claim 1 wherein the polyamide is selected from the group consisting of nylon-6, nylon 6-6, a copolymer of nylon-6 and nylon 6-6, nylon-9, nylon-10, nylon-11, nylon-12, nylon 6-10, aromatic polyamides, elastomeric polyamides, and mixtures thereof.
3. The compounded polymer of claim 1 wherein the olefin is ethylene.
4. The compounded polymer of claim 3 , wherein the olefin-maleic anhydride polymer has a ratio of ethylene to maleic anhydride of 1:1.
5. The compounded polymer of claim 1 , wherein the olefin-maleic anhydride polymer has a molecular weight of about 300 to 1,000,000.
6. The compounded polymer of claim 5 , wherein the olefin-maleic anhydride polymer has a molecular weight of about 60,000 to about 400,000.
7. The compounded polymer of claim 1 , wherein the olefin-maleic anhydride polymer is present at a concentration of about 0.01% to about 0.5%, about 0.5% to about 1.0%, about 1.0% to about 1.5%, or 1.5% to about 3.0% w/w.
8. The compounded polymer of claim 1 , wherein the compounded polymer is formed by compounding the polyamide and the polymer at a processing temperature from about 230° C. to about 300° C.
9. A composition comprising the compounded polymer of claim 1 and a glass fiber.
10. A composition comprising the compounded polymer of claim 1 and one or more stabilizing agents.
11. A method of preparing a compounded polyamide comprising:
compounding a polyamide mixture comprising a polyamide and an olefin-maleic anhydride copolymer at a processing temperature wherein the olefin is selected from the group consisting of ethylene, propylene, isobutylene, butene-1, octene, butadiene, isoprene, hexene, dodecene, dodecene-1, and tetradecene wherein the olefin-maleic anhydride copolymer has a molar ratio of maleic anhydride to the olefin of about 1:10 to about 10:1 and the olefin-maleic anhydride copolymer is present at a concentration of about 0.01% to about 5.0% w/w of the compounded polymer.
12. The method of claim 11 , wherein the olefin is ethylene.
13. The method of claim 12 , wherein the olefin-maleic anhydride copolymer has a molecular weight of about 60,000 to about 400,000.
14. The method of claim 11 , wherein the polyamide is a nylon.
15. The method of claim 12 , wherein the olefin-maleic anhydride copolymer has a ratio of ethylene to maleic anhydride of 1:1.
16. The method of claim 15 , wherein the olefin-maleic anhydride copolymer has a molecular weight of about 300 to 1,000,000.
17. The method of claim 15 , wherein the olefin-maleic anhydride copolymer has a concentration of about 0.01% to about 0.5%, about 0.5% to about 1.0%, about 1.0% to about 1.5%, or 1.5% to about 3.0% w/w.
18. The method of claim 11 , wherein the processing temperature is about 230° C. to about 300° C.
19. The method of claim 11 , wherein the polyamide mixture further comprises a glass fiber.
20. The method of claim 11 , wherein the polyamide mixture further comprises one or more stabilizing agents.