Low emission propylene-based polymer resins
A propylene-based polymer resin is characterized by a low volatile emission signature. For example, the propylene-based polymer resin may have a volatile organic compound content no greater than 125 ppm, a semi-volatile organic compound content no greater than 500 ppm, and a C36 oligomeric content no greater than 250 ppm.
1. A propylene-based polymer resin comprising:
a volatile organic compound content no greater than 125 ppm;
a semi-volatile organic compound content no greater than 500 ppm; and
a C36 oligomeric content no greater than 250 ppm, wherein the propylene-based polymer resin is produced utilizing a Ziegler-Natta catalyst.
2. The propylene-based polymer resin of claim 1 , wherein the resin has a tan delta of less than 10.0 at an angular frequency of 0.1 rad/s (180° C.).
3. The propylene-based polymer resin of claim 1 , wherein the volatile organic compound content is no greater than 115 ppm.
4. The propylene-based polymer resin of claim 1 , wherein the semi-volatile organic compound content is no greater than 175 ppm.
5. The propylene-based polymer resin of claim 1 , wherein the C36 oligomeric content is no greater than 220 ppm.
6. The propylene-based polymer resin of claim 1 , wherein the resin comprises a melt flow rate greater than 115 g/10 min.
7. The propylene-based polymer resin of claim 1 , wherein the resin comprises a crystallinity greater than 65%.
8. The propylene-based polymer resin of claim 1 , wherein the resin comprises a mesopentad content greater than 97%.
9. The propylene-based polymer resin of claim 1 , wherein the resin comprises a homopolymer polypropylene.
10. The propylene-based polymer resin of claim 1 , wherein the resin comprises a propylene-ethylene copolymer.
11. The propylene-based polymer resin of claim 1 , wherein the resin comprises a propylene-alpha olefin copolymer.
12. The propylene-based polymer resin of claim 11 , wherein the alpha olefin comprises at least one monomer selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, and combinations of any thereof.
13. The propylene-based polymer resin of claim 1 , wherein the resin is an in-reactor resin.
14. An impact copolymer polypropylene composition comprising:
a rubber phase comprising a propylene-ethylene copolymer; and
a matrix phase comprising the propylene-based polymer resin of claim 1 .
15. A molded article comprising the propylene-based polymer resin of claim 1 .
16. A propylene-based polymer resin comprising:
a volatile organic compound content no greater than 125 ppm;
a semi-volatile organic compound content no greater than 500 ppm;
a C36 oligomeric content no greater than 250 ppm;
a melt flow rate greater than 30 g/10 min.;
a Mw/Mn of greater than 5;
a crystallinity greater than 50%; and
a mesopentad content greater than 92%, wherein the propylene-based polymer resin is produced utilizing a Zeigler-Natta catalyst.
17. The propylene-based polymer resin of claim 16 , wherein the resin is an in-reactor resin.
18. An impact copolymer propylene composition comprising:
a rubber phase comprising a propylene-ethylene copolymer; and
a matrix phase comprising the propylene-based polymer resin of claim 16 .
19. A molded article comprising the propylene-based polymer resin of claim 16 .
20. A homopolymer polypropylene resin comprising:
a volatile organic compound content no greater than 125 ppm;
a semi-volatile organic compound content no greater than 500 ppm;
a C36 oligomeric content no greater than 250 ppm;
a melt flow rate greater than 30 g/10 min.;
a crystallinity greater than 50%; and
a mesopentad content greater than 92%, wherein the propylene-based polymer resin is produced utilizing a Zeigler-Natta catalyst.
21. The homopolymer polypropylene resin of claim 20 , wherein the resin is an in-reactor resin.
22. An impact copolymer polypropylene composition comprising:
a rubber phase comprising a propylene-ethylene copolymer; and
a matrix phase comprising the homopolymer polypropylene resin of claim 20 .
23. A molded article comprising the homopolymer polypropylene resin of claim 20 .
24. The propylene-based polymer resin of claim 1 , wherein the resin has a Mw/Mn of greater than 5.
25. The propylene-based polymer resin of claim 1 , wherein the Zeigler-Natta catalyst is a non-metallocene Ziegler-Natta catalyst.