Foamable thermoplastic polymers and a method for foaming
US4853420A · kind A · utility
10Cited by
13References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1987 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | May 4, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2373/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Foamed products are prepared by subjecting a crosslinked polymer such as an ethylene-carbon monoxide copolymer susceptible to heating by high frequency electromagnetic radiation such as microwave or radio frequency which has been imbibed or impregnated with a suitable mechanical or physical blowing agent such as a halogenated hydrocarbon to sufficient high frequency electromagnetic radiation to cause foaming of the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.