Maleimide containing formulations and uses therefor
AssigneeThe Dexter Corporation
InventorsFrank D. Husson, Jr., Benjamin Neff, Stephen M. Dershem
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Abstract
In accordance with the present invention, there are provided novel hydrophobic compositions comprising a defined hydrophobic maleimide moiety and optionally, a hydrophobic cyanate ester moiety. Invention compositions have excellent moisture resistance (and, hence are much less prone to give rise to “popcorning”), excellent handling properties (i.e., generally existing as a fluid material which does not require the addition of solvent to facilitate the use thereof), and excellent performance properties (e.g., good dielectric properties).
Claims25
A hydrophobic thermosetting resin composition comprising a base formulation comprising:
- (a) a hydrophobic maleimide, wherein said hydrophobic maleimide has the structure:
- wherein:
- m=1, 2 or 3,
- each R is independently hydrogen or lower alkyl, and
- X is a monovalent or polyvalent radical selected from the group consisting of:
- branched chain alkyl, alkylene or alkylene oxide species having from about 20 to about 500 carbon atoms,
- siloxanes having, the structure:
- —(CR2)m′—[Si(R′)2—O]q′—Si(R′)2—(CR2)n′—
- wherein each R is independently defined as above, and each R′ is independently selected from the group consisting of hydrogen, lower alkyl and aryl, m′ falls in the range of 1 up to 10, n′ falls in the range of 1 up to 10, and q′ falls in the range of 1 up to 50,
- and mixtures thereof;
- (b) in the range of 0.2 up to 5 wt % of at least one curing catalyst, based on the total weight of the composition;
- and
- (c) optionally at least one hydrophobic cyanate ester monomer.
In a non-hermetic electronic package, the improvement comprising employing a hydrophobic maleimide-based adhesive composition for each component of said package, wherein said hydrophobic maleimide-based adhesive composition comprises:
- (a) a hydrophobic maleimide, wherein said hydrophobic maleimide has the structure:
- wherein:
- m=1, 2 or 3,
- each R is independently hydrogen or lower alkyl, and
- X is a monovalent or polyvalent radical selected from the group consisting of:
- branched chain alkyl, alkylene or alkylene oxide species having from about 20 to about 500 carbon atoms,
- siloxanes having the structure:
- —(CR2)m′—[Si(R′)2—O]q′—Si(R′)2—(CR2)n′—
- wherein each R is independently defined as above, and each R′ is independently selected from the group consisting of hydrogen, lower alkyl and aryl, m′ falls in the range of 1 up to 10, n′ falls in the range of 1 up to 10, and q′ falls in the range of 1 up to 50, and mixtures thereof;
- (b) in the range of 0.2 up to 5 wt % of at least one curing catalyst, based on the total weight of the composition;
- and
- (c) optionally, at least one hydrophobic cyanate ester monomer.
Dependencies are inferred from the claim text.