Isolation and improvement of impact modifier polymer powders
US4278576A · kind A · utility
22Cited by
8References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1978 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | Dec 5, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/904
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Impact modifier polymer powders are isolated by a process comprising introducing about 0.5 to 50% by weight of stearate coated calcium carbonate having an average particle size of about 0.04 to 1 micron based on polymer and stearate coated calcium carbonate mixture. The resultant mixture has improved anti-compaction properties as well as powder flow. Blends of impact modifier and thermoplastic matrix polymer are also unexpectedly improved. Impact modifier with higher than normal rubber levels can be isolated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.