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
2005-08-30
2005-08-30
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...
C257S793000, C438S127000, C523S427000, C523S428000, C523S445000, C523S457000, C523S466000, C525S485000, C525S486000, C525S523000, C525S524000, C525S533000, C528S366000, C549S562000
Reexamination Certificate
active
06936664
ABSTRACT:
The present invention discloses reworkable epoxy compositions suitable for encapsulation of and underfill for electronic components comprising (a) a curable epoxy component which is the reaction product of an epoxidized 1-alkenyl ether or 1-cycloalkenyl ether and a polycarboxylic acid, the reaction product being substantially free of unreacted acid or acid impurities; and (b) a curing agent for the epoxy component, wherein the reaction products of the epoxy composition are reworkable. The cured epoxy compositions of this invention contain thermally labile weak α-alkoxy ester linkages which provide for the reworkable aspect of the invention.
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Kneafsey Brendan J.
Morrill Susanne D.
Wang Jianzhao
Woods John G.
Bauman Steven C.
Henkel Corporation
Sellers Robert
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