Dave Dunn Ph.D.

 One never gets a full 100% cure of these thermoset systems at relatively low temperatures because molecular mobility goes down dramatically as the adhesive increases in viscosity during curing. 

 It’s important to understand that the term polyurethane covers a wide range of systems. 

 Both types of adhesives are very versatile; the choice depends on your operating environments and manufacturing situation. 

Question: I am trying to bond several rubber parts together. I would like to try a cyanoacrylate adhesive, but I hear they are very brittle when cured. Is that true?

QUESTION: I see many so-called “five-minute” epoxy adhesives (and sometimes ones with even shorter cure times). Are these adhesives truly strong and durable?

QUESTION: We want to bond steel to foamed polystyrene in large bond areas, and we want to use a cost-effective adhesive that doesn’t take long to dry. Is a hot melt the way to go?

Is it true that epoxy adhesives contain the same BPA that has been shown to be harmful when used to make drinking bottles?

QUESTION: The adhesives we use are now available from more than one supplier. How can we feel comfortable when changing to a new supplier?

QUESTION: We are successfully structurally bonding Belgian Blue Stone—also called Petit Granit (a non-porous limestone material)—with a two-component epoxy in an industrial process.

QUESTION: We are looking for adhesives with high electrical conductivity for several assembly operations. What alternatives do we have?