Epoxy resin, curing agent and...

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

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C523S452000

Reexamination Certificate

active

07897702

ABSTRACT:
The invention discloses a novel cross-linked epoxy resin with flame-retardant properties and method for producing the same. The polymeric material of the invention includes an epoxy resin, a curing agent and a modification agent. Particularly, the modification agent is a derivative of 9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-Oxide (DOPO). Moreover, the curing agent is 4,4′-diaminodiphenyl methane (DDM), or tris(4-aminephenyl)amine (NNH).

REFERENCES:
patent: 1548473 (2004-11-01), None
patent: 101307170 (2008-11-01), None
patent: 2004-175891 (2004-06-01), None
Lin et al., “Flame-Retardant Epoxy Resins with High Glass-Transition Temperatures. II. Using a Novel Hexafunctional Curing Agent: 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-yl-tris(4-aminophenyl) methane,” Journal of Polymer Science, Part A, Polymer Chemistry, vol. 43, No. 23, 2005, pp. 5971 to 5986.

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