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
2005-10-04
2005-10-04
Sellers, Robert (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S486000, C528S122000, C528S124000
Reexamination Certificate
active
06951907
ABSTRACT:
A thermosetting resin is useful as an underfilling sealant form mounting semiconductors onto a printed circuit board and comprises (a) an epoxy resin containing at least one multifunctional epoxy resin, (b) an adhesion promotor having at least two secondary amine groups wherein the weight ratio of epoxy resin:adhesion promotor being from about 2:1 to about 20:1, (c) a curative of a nitrogen-containing compound and a transition metal complex; and, optionally, a polysulfide toughening agent.
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Bauman Steven C.
Henkel Corporation
Sellers Robert
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