How Super Glue Bonds Acidic Surfaces Like Wood

A 1954 method for using alcohol to help super glue stick to acidic surfaces like wood, which normally prevent the glue from hardening properly.

What it covers

This patent describes a chemical trick to make cyanoacrylate adhesives—commonly known as super glue—work on surfaces that are naturally acidic, such as wood. Normally, acidic surfaces prevent the glue from polymerizing, or hardening, effectively. By first applying an alkyl monohydric alcohol (a simple alcohol) to the wood surface, the inventor neutralizes the acidity or creates a favorable environment for the glue to set. The process involves moistening the wood with the alcohol and then applying the monomeric lower alkyl alpha-cyanoacrylate adhesive to form a strong bond.

What it doesn't cover

• —Does not cover the invention of cyanoacrylate adhesive itself.
• —Does not cover bonding non-acidic surfaces that do not require an alcohol primer.
• —Does not cover the use of alcohols with more than 8 carbon atoms.
• —Does not cover adhesives that are not based on alpha-cyanoacrylate monomers.

The clever bit

The inventor realized that the failure of the glue on wood wasn't a problem with the glue's strength, but a chemical interference from the wood's acidity that could be bypassed with a simple, cheap alcohol treatment.

Why it matters

This discovery was essential for expanding the utility of super glue from a niche industrial chemical into a versatile household adhesive. It solved a specific failure point where the glue would remain liquid on wood, making it reliable for carpentry and woodworking applications.

Real-world examples

• 1.Woodworking adhesives
• 2.Super glue primers for porous materials
• 3.Industrial bonding of acidic substrates