Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2006-01-10
2006-01-10
Sellers, Robert (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C525S189000
Reexamination Certificate
active
06984711
ABSTRACT:
A method of production of a cyclic polysulfide having the formula (I):wherein x is an integer of 2 to 6, n is an integer of 1 to 15, and R indicates a substituted or unsubstituted C2to C18alkylene group or a substituted or unsubstituted C2to C18alkylene group including an oxyalkylene group comprising:reacting a dihalogen compound of the formula X—R—X wherein, X independently indicates a halogen atom, and R indicates a substituted or unsubstituted C2to C18alkylene group or a substituted or unsubstituted C2to C18alkylene group including an oxyalkylene group and an alkali metal polysulfide of the formula M2Sxwherein, M is an alkali metal and x is an integer of 2 to 6, by a two-phase system in an incompatible mixed solvent of a hydrophilic and lypophilic solvent.
REFERENCES:
patent: 6518367 (2003-02-01), Yatsuyanagi et al.
CAPLUS accession No. 1972:35343, Japanese Patent No. 46-27543 B4, Sekisui Chemical Co. Ltd., Aug. 10, 1971.
CAPLUS accession No. 1952:70623, Cranker et al., “Use of polysulfide liquid polymers for impregnation of leather,” Journal of the American Leather Chemists Association, vol. 47, 1952, abstract.
CAPLUS accession No. 1966:491046, Hayashi et al., “Molecular vibrations and structures of polyalkylene polysulfides. II. Poly(ethylene disulfide),” Bulletin of the Chemical Society of Japan, vol. 39, No. 9, 1966, abstract.
CAPLUS accession No. 1972:527101, Golgotiu et al., “Acquiring polymers with S-S- linkage in the principle chain,” Bulentinul Institutului Politehnic din lasi, vol. 18, Nos. 1-2, 1972, abstract.
CAPLUS accession No. 1972:527651, Romanova et al., “Kinetics of the interaction of bis(.beta.-chloroethyl)formal with sodium polysulfide,” Izvestiya Vysshikh Uchebnykh Zavadenii, Khimiya i Khimicheskaya Tekhnologiya, vol. 15, No. 6, 1972, abstrac.
CAPLUS accession No. 1982:424281, Rafikov et al., “Reactions of dihalo derivatives with inorganic sulfides,” Izvestiya Akadem Nauk USSR, Seriya Khimicheskaya, vol. 4, 1982, abstract.
CAPLUS accession No. 1988:474395, Nasonova et al., “Structural features of a high-molecular-weight polysulfide polymer,” Kauchuk i Rezina, vol. 4, 1988, abstract.
CAPLUS accession No. 1998:224337, Akiyama et al., “Synthesis of polydisulfide and control of it's molecular weight,” Polymer Preprints, vol. 39, No. 1, 1998, abstract.
Ishikawa Kazunori
Wonmun Choi
Rader & Fishman & Grauer, PLLC
Sellers Robert
The Yokohama Rubber Co. Ltd.
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