Instant adhesive composition utilizing calixarene accelerators
AssigneeLoctite (Ireland) Limited
InventorsStephen J. Harris, M. Anthony McKervey, David P. Melody, John Woods, John M. Rooney
Life of this patent
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AssigneeLoctite (Ireland) Limited
InventorsStephen J. Harris, M. Anthony McKervey, David P. Melody, John Woods, John M. Rooney
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 preferably employed at levels of about 0.1-1% by weight of the composition. The calixarene compounds particularly useful in this invention may be represented by the formula: ##STR1## where R.sup.1 is alkyl, alkoxy, substituted alkyl or substituted alkoxy; R.sup.2 is H or alkyl; and n=4, 6, or 8. The compositions are further characterized by a thickener component, which may suitably be selected from various polymers such as poly(methyl methacrylate), methacrylate type copolymers, acrylic rubbers, polyvinyl acetate and poly(.alpha.-cyanoacrylate) or silicas treated with polydialkylsiloxanes or trialkylsilanes.
In a cyanoacrylate adhesive composition, the improvement comprising that the composition includes a thickener in an amount of about 20% or less by weight of the composition and an accelerator compound in a conventional amount, the thickener selected from the group consisting of poly(methyl methacrylate);
Dependencies are inferred from the claim text.