Curable composition for forming low bleeding gel type cured...

Details Curable composition for forming low bleeding gel type cured... Curable composition for forming low bleeding gel type cured...

2005-11-08

2005-11-08

Feely, Michael J. (Department: 1712)

Stock material or miscellaneous articles

Composite

Of fluorinated addition polymer from unsaturated monomers

C428S421000, C428S447000, C524S858000, C524S860000, C524S861000, C524S862000, C528S015000, C528S025000, C528S028000, C528S031000, C528S032000, C528S033000, C528S034000, C528S035000, C528S036000, C528S042000, C528S043000, C528S401000

Reexamination Certificate

active

06962752

ABSTRACT:
A curable composition comprising:(A) a branched polyfluorodialkenyl compound represented by a general formula (1):in-line-formulae description="In-line Formulae" end="lead"?CH2═CH—(X)a-Rf1-(X′)a—CH═CH2  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein, X and X′ are bivalent groups such as —CH2— and —CH2O—, a represents, independently, either 0 or 1, and Rf1is a specific bivalent fluorine-containing group, (B) a branched polyfluoromonoalkenyl compound represented by a general formula (2):in-line-formulae description="In-line Formulae" end="lead"?Rf2-(X′)a—CH═CH2  (2)in-line-formulae description="In-line Formulae" end="tail"?wherein, X′ and a are as defined above, and Rf2is a specific fluorine-containing group, (C) an organohydrogensiloxane compound with at least two hydrogen atoms bonded to silicon atoms, and (D) a platinum group metal catalyst; as well as a low bleeding gel type cured product obtained by curing such a composition, and an electrical or electronic component sealed or encapsulated using such a cured product. The gel type cured product displays very little bleeding of free oil constituents from the gel as a result of stress such as pressure fluctuation or heat history.

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