Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-03-05
2008-08-19
Sellers, Robert (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C252S182130, C528S122000, C528S124000, C528S392000
Reexamination Certificate
active
07414097
ABSTRACT:
The epoxy resin curing agent of the present invention comprises a polyamino compound obtainable by addition reaction of aliphatic diamine represented by the formula (1) and styrene and a curing accelerator comprising an organic compound having at least one carboxyl group and at least one hydroxyl group within the molecule, which can achieve a low viscosity without containing environmental harmful substances such as phenol and solvents. In addition, the epoxy resin composition using said epoxy resin curing agent shows an excellent curability at low temperature and it provides a cured coating film having excellent appearance.in-line-formulae description="In-line Formulae" end="lead"?H2N—H2C—A—CH2—NH2 (1)in-line-formulae description="In-line Formulae" end="tail"?wherein A is a phenylene group or a cyclohexylene group
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Echigo Masatoshi
Koyama Takeshi
Kuwahara Hisayuki
Mitsubishi Gas Chemical Company Inc.
Sellers Robert
Wenderoth , Lind & Ponack, L.L.P.
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