Method of making expandable thermoplastic polymer beads
US4368218A · kind A · utility
10Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1980 |
| Grant date | Jan 11, 1983 |
| Priority date | — |
| Expiry date | Mar 17, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Expandable thermoplastic polymer beads and method of producing same, wherein a core of a polymer of one or more vinyl monomers is substantially surrounded by a layer of a polyolefin comprising one or more vinyl monomers, with a foaming agent contained in at least the core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.