Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2006-05-23
2006-05-23
Sellers, Robert (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C523S416000, C523S454000, C525S510000, C525S528000
Reexamination Certificate
active
07049354
ABSTRACT:
The present invention provides a novel oxazolidone ring-containing epoxy resin suitable for use as a resin for a coated film having a structure of the formula:wherein R3represents a residue excluding epoxy groups of diepoxide, X represents a residue excluding isocyanate groups of polyurethane diisocyanate, and n represents an integer of 1 to 5; and wherein X has a structure of the formula:wherein R1represents a residue excluding isocyanate groups of diisocyanate, R2represents a residue excluding hydroxyl groups of diol, and m represents an integer of 2 to 10.
REFERENCES:
patent: 4442281 (1984-04-01), Hentschel et al.
patent: 4658007 (1987-04-01), Marks et al.
patent: 5447973 (1995-09-01), Yamada et al.
patent: 5686541 (1997-11-01), Wang et al.
patent: 3-43473 (1991-02-01), None
Nakajima Eiji
Yamada Mitsuo
Yamoto Shuhei
Nippon Paint Co. Ltd.
Sellers Robert
Wenderoth , Lind & Ponack, L.L.P.
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