Polymer/CaCO.sub.3 composite core/sheath particulates and hollow . CaCO.sub3 microbeads prepared therefrom
US6093487A · kind A · utility
2Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1998 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Apr 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Composite core/sheath particulates comprising an organic polymer core at least partly coated with calcium carbonate, these core/sheath particulates having a mean particle size not exceeding 5 .mu.m, well suited for reinforcing plastic/elastomer substrates, are conveniently converted, e.g., via calcination, into hollow calcium carbonate microbeads which comprise CaCO.sub.3 shells having a mean particle size not exceeding 5 .mu.m; such hollow microbeads are themselves well suited for enhancing the low-temperature flexibility of elastomer substrates, notably vehicle tires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.