Expandable hollow particles
US5834526A · kind A · utility
14Cited by
9References
8Claims
0Family size
Inventors
Key dates
| Filing date | Jul 11, 1997 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Jul 11, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2203/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Microspheres are described which have a shell of thermally expandable polymer and a hollow interior that contains a fluorinated hydrocarbon that boils at a temperature below the melting point of the polymer, and contains an organic ester or ether or ketone. The ester or ether or ketone improves the quality of microsphere product. The expandable particles are useful in insulation, packaging, for expanding other polymer such as polytetrafluoroethylene, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.