Process for shaping solid polybut-1-ene and the resulting shaped articles
US4324756A · kind A · utility
3Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1979 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | Oct 18, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/20
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Shaped articles of polybut-1-ene are made by preheating a polymer blank in the crystalline form II at a temperature between 20.degree. and 90.degree. C. The preheated blank is then press-forged under a pressure between 8 and 100 kgf/mm.sup.2 for a period of 1-40 seconds. During the shaping operation, the polymer is converted into the crystalline form I. Polybut-1-ene shaped articles are formed that have a melting peak, determined by differential thermal analysis, at 119.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.