Encapsulating compositions

Details Encapsulating compositions Encapsulating compositions

C - Chemistry, Metallurgy

08

K

402/17, 402/294,

C08K 5/00 (2006.01) C08K 5/04 (2006.01) C08K 5/06 (2006.01) C08K 5/15 (2006.01) C08K 5/20 (2006.01) C08K 5/549 (2006.01) H01B 3/40 (2006.01)

Patent

CA 1314354

- 30 - ABSTRACT OF THE DISCLOSURE An encapsulating composition for electronic devices which comprises a polymeric material and a metal ion scavenger selected from A) Calixarene or oxacalixarene derivatives represented by the formula Image wherein m'+ m" = 0 - 8 n = 0 - 8 m' ? 1/2 (m' + m") 3 ? m' + m" + n ? 8 if n = 0, m' ? m" ? 4 R3 is H, halogen, or hydrocarbyl, aryl, hydrocarbylaryl or a substituted derivative thereof, and R3 may be the same or different on each aryl group; R4 is hydrocarbyl, aryl, hydrocarbylaryl, hydrocarbyloxy, aryloxy, or hydrocarbylaryloxy, or a substituted derivative thereof; or R is Image wherein R5 and R6 which may be the same or different are H, or hydrocarbyl, aryl, hydrocarbylaryl, or a substituted derivative thereof; R15 is H or hydrocarbyl, aryl, hydrocarbylaryl or a substituted derivative thereof; the calixarene or oxacalixarene derivative being present as a compound per se or being bound into the polymer network of the polymeric material; - 31 - B) Silacrowns represented by the formula III Image wherein R7 and R8 which may be the same or different are hydrocarbyl, aryl, hydrocarbylaryl, hydrocarbyloxy, aryloxy, hydrocarbylaryloxy, or a nitrogen-substituted or other substituted derivative thereof; z is 3 - 6 C) Polyalkylene ether glycols and ether derivatives thereof represented by the formula IV, V, VI or VII below: IV R9-(R10-0)q-R11 wherein q is an integer of from 2 to 3000; R10 is a substituted or unsubstituted alkyl residue having 2 to 6 carbon atoms, the (R10-0) groups containing the same alkyl residue or containing 2 or more different alkyl residues which may be distributed on the chain in a random or block manner; R11 is hydrogen, hydrocarbyl, aryl, hydrocarbylaryl, or a substituted derivative thereof; R9 is hydroxy, hydrocarbyloxy, aryloxy, hydrocarbylaryloxy or a substituted derivative thereof; V Image - 32 - wherein R12 is -(R10-0)q-R11 in which R10, R11 and q are as defined above; VI Image wherein R12 is as defined above; R13 is hydrogen, halogen, or hydrocarbyl, aryl or hydrocarbylaryl or a substituted derivative thereof; and x is an integer from 4 to 8; VII Image wherein R10, R11 and q are as defined above.

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