Activator for cyanoacrylate adhesives
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsHanns Misiak, Ingolf Scheffler
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Abstract
Organic compounds containing the structural element —N═C—S—S—C═N— are suitable in dilute solution as activators for the accelerated hardening of cyanoacrylate adhesives. As compared with the known accelerators, they have the following advantage: good accelerating action, but they nevertheless permit a long waiting time between application of the activator and application of the adhesive. In addition, they avoid spontaneous, merely superficial hardening.
Claims20
A process for bonding two or more substrates, comprising the steps of:
- (a) applying to a first substrate surface to be bonded an activator for accelerated hardening of a cyanoacrylate adhesive, said activator comprising an organic solvent and one or more organic activator compounds containing the structure —N═C—S—S—, wherein N═C represents a carbon-nitrogen double bond or a carbon-nitrogen π-bond;
- (b) applying a cyanoacrylate adhesive composition to the first substrate surface to be bonded or to a second substrate surface to be bonded to the first substrate surface;
- and
- (c) joining the first and second substrate surfaces to form a bond between the surfaces.
A process for bonding two or more substrates, comprising the steps of:
- (a) applying to a first substrate surface that is at least partly applied with a cyanoacrylate adhesive composition an activator for accelerated hardening of a cyanoacrylate adhesive, said activator comprising an organic solvent and one or more organic activator compounds containing the structure —N═C—S—S—, wherein N═C represents a carbon-nitrogen double bond or a carbon-nitrogen π-bond;
- and
- (c) joining the first substrate surface with the adhesive composition and activator applied to a second substrate surface to form a bond between the surfaces.
A method of bonding two or more substrates, comprising the steps of activating a cyanoacrylate adhesive with an activator for accelerated hardening of a cyanoacrylate adhesive, said activator comprising an organic solvent and one or more organic activator compounds containing the structure —N═C—S—S—, wherein N═C represents a carbon-nitrogen double bond or a carbon-nitrogen π-bond, and bonding two or more substrates with the activated cyanoacrylate adhesive.
A method of using an activator comprising an organic solvent and one or more organic activator compounds containing the structure —N═C—S—S—, wherein N═C represents a carbon-nitrogen double bond or a carbon-nitrogen π-bond, for activating a cyanoacrylate adhesive, comprising the steps of providing said adhesive, providing said activator, and activating said adhesive with said activator.
An activator for accelerated hardening of a cyanoacrylate adhesive, comprising an organic solvent and one or more organic activator compounds containing the structure —N═C—S—S—, wherein N═C represents a carbon-nitrogen double bond or a carbon-nitrogen π-bond.
Dependencies are inferred from the claim text.