Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2007-11-27
2007-11-27
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...
C428S413000, C428S417000, C525S524000
Reexamination Certificate
active
10939681
ABSTRACT:
Hardeners for water-based epoxy resin systems, the hardeners being obtainable by reacting a mixture of: (A) at least one epoxidized polyalkylene oxide selected from the group of epoxidized polyethylene oxides, epoxidized polypropylene oxides and polyethylene propylene oxides, (B) at least one epoxidized aromatic hydroxy compound selected from the group of bisphenol A epoxides and bisphenol F epoxides and (C) at least one aromatic hydroxy compound selected from the group of bisphenol A and bisphenol F, to form an intermediate product and subsequently reacting this intermediate product with a polyamine (E), are disclosed.
REFERENCES:
patent: 4608405 (1986-08-01), DeGooyer
patent: 5612394 (1997-03-01), Pfeil et al.
CAPLUS accession No. 2000:396733 and Derwent accession No. 1996-085694 for Romanian Patent No. 109,739, Braniste et al., May 30, 1995, three pages.
Birnbrich Paul
Roloff Thorsten
Sabbadini Giorgio
Thomas Hans-Josef
Cognis Deutschland GmbH & Co. KG
Daniels John F.
Oritz Daniel S.
Sellers Robert
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