Organic nucleating agents that impart very high impact resistance and other beneficial physical properties within polypropylene articles at very low effective amounts
US7144939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2003 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Feb 28, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/412
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The use of organic based nucleating agents to induce certain specific polymer orientations into the molded polypropylene articles such that the resultant part has improved stiffness-impact properties without sacrificing other attributes of the polypropylene is provided. Such results have been obtained through the utilization of low amount of organic nucleating compounds, including, without limitation, specific metal salts of hexahydrophthalic acid (hereinafter HHPA). Furthermore, such nucleating compounds have been found to impart, again in such low added amounts, heretofore unforeseen levels of b-axis crystalline orientation which translates into improved physical properties as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.