Encapsulating compositions

Details Encapsulating compositions Encapsulating compositions

1988-11-14

1990-03-13

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524244, 524265, 524266, 524370, 524376, 524375, 524285, 524288, 524289, 524290, 524292, 524383, 524391, 524385, 524481, 524482, 524487, 524488, 524523, 524533, 525477, 525474, C08L 2300

Patent

active

049083996

ABSTRACT:
An encapsulating composition for electronic devices comprises a curable material such as an epoxy resin and an ion scavenger compound selected from certain calixarene or oxycalixarene compounds in which at least half of the phenolic groups have been substituted by specific groups and certain silacrown compounds. Exemplary ion scavenger compounds include ##STR1## the tetraethyl acetate of 7, 13, 19, 25-tetra-tertbutyl-27, 28, 29, 30-tetrahydroxy-2,3-dihomo-3-oxacalix-4-arene and 1,1-dimethasila-17-crown-6.

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Harper, A. H., "Embedding", Encyclopedia of Chemical Technology Kirk-Othmer, vol. 8, pp. 877-899, J. Wiley & Sons, 1979.
Ungaro, et al., "New Ionizable Ligands from p.t-Butylcalix[4]arene" Journal of Inclusion Phenomena 2, pp. 199-206, 1984.
Gutsche, D. C., "The Calixarenes", Topics in Current Chemistry, 123 pp. 1-47, 1984.
Streitwieser, Jr. et al. Introduction to Organic Chemistry, 2nd ed, (1981) p. 643, Macmillan Publishing Co. Inc, New York.

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