Instant adhesive composition utilizing mixed functionality calixarenes as accelerators
AssigneeLoctite (Ireland) Limited
InventorsRaymond G. Leonard, Stephen J. Harris
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AssigneeLoctite (Ireland) Limited
InventorsRaymond G. Leonard, Stephen J. Harris
Estimating the term…
Cyanoacrylate adhesive compositions which employ calixarene compounds as additives give substantially reduced fixture and cure times on de-activating substrates such as wood. The calixarene compounds are preferable employed at levels of about 0.1-2% by weight of the composition. The calixarene compounds particularly useful in this invention may be represented by the formula: ##STR1## where R.sup.3 is H, --CH.sub.2 C(.dbd.O)OH, CH.sub.2 C(.dbd.O)OR.sup.6, --C(.dbd.O)R.sup.8, hydrocarbyl, or trihydrocarbylsilyl or the two R.sup.3 groups together form a divalent hydrocarbyl or oxygen interrupted hydrocarbyl group; R.sup.4 is H or hydrocarbyl; R.sup.5 is hydrocarbyl, hydrocarbyl interrupted by one or more oxygen atoms, or hydrocarbyl substituted with halo, nitro, or oxo groups; R.sup.6 is as defined for R.sup.5 but different therefrom; and R.sup.8 is as defined for R.sup.5 but the same or different therefrom.
In a cyanacrylate adhesive composition, the improvement comprising that said composition includes an accelerator in a conventional amount, the accelerator being a calixarene compound stable to cyanocrylate monomers represented by the formula:
Dependencies are inferred from the claim text.