Loctite (Ireland) Limited

Loctite Corporation

Maureen G MacManus

Stephen J Harris

John Guthrie

Michael A McKervey

Ciaran Mcardle

Polymerizable calixarene and oxacalixarene derivates wherein at least one aryl group of the macrocyclic ring has a phenolic side chain of the formula VII: ##STR1## wherein Z is a group containing an acrylate or methacrylate functional group. Linear polymers may be formed from these compounds by free radical polymerization at the (meth)acrylate group. Such compounds and their polymers are capable of sequestering metals.

Polymerizable calixarene and oxacalixarene derivatives, polymers thereof

Calixarene and oxacalixarene derivatives of the formula IV: ##STR1## wherein m'+m'=0-8

Calixarene and oxacalixarene derivatives and use thereof of

The application describes nitrogen-containing an oxacalixarene or calixarene derivative of formula I: ##STR1## wherein m'+m'=0-8

Nitrogen-containing oxacalixarene and calixarene derivatives, polymers

Oxacalixarenes of general formula I: ##STR1## wherein m=0-7 and n=1-8 with the proviso that m+n.ltoreq.8;

Functionalized oxacalixarenes, their preparation and use in instant

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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Dublin, Ireland

Maureen G MacManus