Process for preparing polycarbonate copolymer foam suitable for lost foam casting
US4773466A · kind A · utility
15Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1987 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Dec 14, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2369/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The evaporative casting of molten metals has been shown to produce castings having smooth surfaces without any sign of carbon deposits thereon by using a copolymer polycarbonate prepared from cyclohexene oxide, cyclopentene oxide, cycloheptene oxide, or isobutylene oxide and carbon dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.