Method of foaming thermoplastic polymeric materials using tetrazole-containing heterocycles
US4258138A · kind A · utility
3Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1979 |
| Grant date | Mar 24, 1981 |
| Priority date | — |
| Expiry date | Oct 15, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J9/108
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method of foaming thermoplastic polymeric materials using as blowing agents polycyclic fused ring heterocycles containing the tetrazole moiety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.