Bonding system having adherence to low energy surfaces
AssigneeHenkel Loctite Corporation
InventorEerik Maandi
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Abstract
The present invention is directed to (meth)acrylate compositions useful for bonding substrates including metals, plastics, and glass to similar or different substrates, in particular, low energy surfaces. The invention also provides an initiator system for (meth)acrylate based adhesives; a kit for bonding substrates, at least one of which includes a low energy surface; a resultant bonded assembly; and a method of bonding low energy substrates. A (meth)acrylate composition within the present invention includes a (meth)acrylate component and an initiator system including an organometallic compound, a peroxy compound, an aziridine functionalized compound, and a compound having an acid functional group.
Claims9
A (meth)acrylate composition consisting essentially of:
- a (meth)acrylate component;
- a first initiator system for initiating polymerization of said (meth)acrylate component comprising
- an organometallic compound;
- and
- a peroxy compound;
- and
- a second initiator system for initiating polymerization of said (meth)acrylate component comprising
- an aziridine functionalized compound;
- and
- a compound having an acid functional group.
A method of bonding low energy substrates comprising the steps of:
- providing at least two substrates;
- providing a (meth)acrylate adhesive composition consisting essentially of
- a (meth)acrylate component;
- a dual two-part initiator system comprising a metallocene, a peroxy compound, an aziridine functionalized compound, and a compound having an acid functional group;
- applying, on a surface of a first of the at least two substrates, the (meth)acrylate adhesive composition;
- contacting the (meth)acrylate adhesive composition-coated surfaces of the at least two susbtrates;
- curing the (meth)acrylate adhesive composition to provide a bond shear strength between the at least two substrates of greater than about 200 psi.
Dependencies are inferred from the claim text.