Molding material for ozone-resistant articles and ozone-resistant injection-molded articles
US7169868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2002 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Dec 4, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Highly ozone-resistant molding/shaped articles inclusive of piping materials and joints for use in semiconductor production lines, molding materials for ozone-resistant molding/shaped articles which are suited for the production of the molding/shaped articles, and ozone-resistant injection-molded articles and relevant injection-molding materials. Also disclosed is a molding material for ozone-resistant molding/shaped articles including a copolymer (A) and having a melt flow rate of 0.1–50 g/10 minute. The copolymer (A) is a copolymer including tetrafluoroethylene and a perfluorovinylether, and has not less than 3.5 mass % of a perfluorovinylether unit, a melting point of not less than 295° C., and not more than 50 of unstable terminal groups per 1×106 carbon atoms in the copolymer (A).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.