Reinforced polyamides having improved anti-delamination
View Patent ↗The present invention generally relates to polyamide compositions having improved anti-delamination. More specifically, the present invention relates to novel polyamide compositions demonstrating improved anti-delamination, in which the compositions have at least one reinforcement agent.
1. A polyamide composition having improved anti-delamination comprising:
(a) about 5 to about 30 wt. % of at least one low purity polyamide having a polyamide content of about 60 to less than 80 wt. %;
(b) about 20 to about 55 wt. % of at least one high purity polyamide composition having a polyamide content of 95 to 100 wt. %, selected from:
(i) at least one virgin polyamide;
(ii) at least one high purity recycled polyamide;
(iii) or mixtures thereof;
(c) an olefinic content having a heat of melting of about 4.0 J/g or less; and
(d) about 1 to about 50 wt. % of at least one reinforcement agent;
wherein the weight percentages are based on a total weight of the polyamide composition.
2. The polyamide composition of claim 1 , wherein the low purity polyamide is a post-consumer recycled (PCR) polyamide.
3. The polyamide composition of claim 1 , wherein the high purity recycled polyamide is a post-consumer recycled (PCR) polyamide.
4. The polyamide composition of claim 1 , wherein the low purity polyamide comprises about 60 to less than 80 wt. % of polyamide 6, polyamide 66, or mixtures thereof.
5. The polyamide composition of claim 1 , wherein the high purity polyamide comprises 95 to 100 wt. % of polyamide 6, polyamide 66, or mixtures thereof.
6. The polyamide composition of claim 1 , wherein the olefin content has a heat of melting of 3.4 J/g or less.
7. The polyamide composition of claim 1 further comprising (e) at least one functionalized polyolefin selected from a grafted propylene homopolymer, a grafted ethylene/1-octene copolymer, a grafted ethylene/propylene copolymer, a grafted ethylene/butene copolymer, a grafted ethylene/propylene/diene terpolymer (EPOM), or mixtures thereof.
8. The polyamide composition of claim 1 , wherein the olefinic content is about 10 wt. % or less.
9. The polyamide composition of claim 1 , wherein the olefinic content is about 4 to about 6 wt. %.
10. The polyamide composition of claim 1 comprising about 10 to about 30 wt. % of the low purity polyamide.
11. The polyamide composition of claim 1 comprising about 30 to about 40 wt. % of the high purity polyamide composition.
12. The polyamide composition of claim 7 comprising about 1 to about 15 wt. % of the functionalized polyolefin.
13. A polyamide composition having improved anti-delamination comprising:
(a) about 5 to about 30 wt. % of at least one low purity, post-consumer recycled polyamide 66;
(b) about 20 to about 55 wt. % of at least one high purity polyamide 66 composition selected from:
(i) at least one virgin polyamide 66;
(ii) at least one high purity, post-consumer recycled polyamide 66;
(iii) or mixtures thereof;
(c) an olefinic content having a heat of melting of 3.4 J/g or less;
(d) about 10 to about 45 wt. % of at least one reinforcing agent; and
(e) about 2 to about 10 wt. % of at least one functionalized polyolefin;
wherein the weight percentages of (a), (b), (c), (d), and (e) are based on a total weight of the polyamide composition.
14. A polyamide composition having improved anti-delamination comprising:
(a) about 35 to about 75 wt. % of at least one medium purity polyamide having a polyamide content of 80 to less than 95 wt. %;
(b) an olefinic content having a heat of melting of about 4.0 J/g or less; and
(c) about 1 to about 50 wt. % of at least one reinforcement agent;
wherein the weight percentages are based on a total weight of the polyamide composition.
15. The polyamide composition of claim 14 , wherein the medium purity polyamide is a post-consumer recycled (PCR) polyamide and comprises 80 to less than 95 wt. % of polyamide 6, polyamide 66, or mixtures thereof.
16. The polyamide composition of claim 14 , wherein the olefin content has a heat of melting of 3.4 J/g or less.
17. The polyamide composition of claim 14 further comprising about 1 to about 15 wt. % of (d) at least one functionalized polyolefin selected from a grafted propylene homopolymer, a grafted ethylene/1-octene copolymer, a grafted ethylene/propylene copolymer, a grafted ethylene/butene copolymer, a grafted ethylene/propylene/diene terpolymer (EPDM), or mixtures thereof.
18. The polyamide composition of claim 14 , wherein the olefinic content is about 4 to about 6 wt. %.
19. The polyamide composition of claim 14 comprising about 10 to about 45 wt. % of the reinforcing agent.