Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-01-30
2007-01-30
Choi, Ling-Sui (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C152S209100, C526S250000
Reexamination Certificate
active
10497586
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 1×106carbon atoms in the copolymer (A).
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International Search Report for PCT/JP02/12690 dated Mar. 25, 2003 (with english translation).
International Search Report for PCT/JP02/12690 dated Mar. 25, 2003.
Aoyama Takahisa
Imamura Hitoshi
Ohtani Katsuhide
Shimizu Tetsuo
Choi Ling-Sui
Daikin Industries Ltd.
Hu Henry S.
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