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Home » Topics » Columns » Ask Dr. Dave

Ask Dr. Dave
Ask Dr. Dave RSS Feed RSS

Ask Dr. Dave

I am trying to understand how the organosilanes act chemically.

Organosilanes have been used for many years to enhance the durability of adhesive bonds, particularly to glass surfaces.
Dave Dunn, Ph.D.
Dave Dunn Ph.D.
March 1, 2016

Dave Dunn's March 2016 column.


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Ask Dr. Dave

How do I disassemble nuts and bolts that were assembled using anaerobic threadlockers, then re-use the fasteners?

Threadlockers are generally comprised of three common types.
Dave Dunn, Ph.D.
Dave Dunn Ph.D.
February 1, 2016
Dave Dunn's February 2016 column.
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Ask Dr. Dave: How can I tell if my adhesive has fully cured?

Maximum properties for epoxies are only achieved by curing at high temperatures for long periods of time to complete the reactions.
Dave Dunn, Ph.D.
Dave Dunn Ph.D.
January 4, 2016

Dave Dunn's January 2016 column.


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Ask Dr. Dave: We noticed that there are a lot of brown particle in the dispenser we use for hot-melt adhesives. What is it?

Examining char in hot-melt adhesives.
December 1, 2015
Dave Dunn's December 2015 column.
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Ask Dr. Dave

Ask Dr. Dave: Should we consider silicones or polyurethanes for our construction applications?

Polyureas tend to be a little more expensive than polyurethanes, but their fast cure and outstanding properties often outweigh this.
Dave Dunn, Ph.D.
Dave Dunn Ph.D.
November 1, 2015

Dave Dunn's November 2015 column.


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Ask Dr. Dave: Please explain tack, peel adhesion and shear strength in regards to pressure-sensitive adhesives.

PSAs can be formulated with a range of adhesive and cohesive properties.
October 1, 2015
Dave Dunn's October 2015 column.
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Ask Dr. Dave: What adhesives do you recommend for bonding fiberglass for indoor applications?

Reactive acrylics can be formulated with very fast cure times, or can be modified so that no cure occurs
Dave Dunn, Ph.D.
Dave Dunn Ph.D.
September 1, 2015

Dave Dunn's September 2015 column.


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Ask Dr. Dave: Is it serious for end users if there are some lumps in a construction adhesive paste?

While the particles are not producing a performance problem, your customers may observe them and think m, your customers may observe them and think that something has changed in the formula.
August 3, 2015
Dave Dunn's August 2015 column.
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Ask Dr. Dave: What type of adhesive should we use to replace mechanical fasteners for metal assembly?

Depending on your productivity and performance requirements, epoxies, acrylics or polyurethanes could be viable options.
July 1, 2015
Dave Dunn's July 2015 column.
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Ask Dr. Dave: Can I dispose of water that has adhesive residue?

The answer is almost certainly no.
Dave Dunn, Ph.D.
Dave Dunn Ph.D.
June 1, 2015
Dave Dunn's June 2015 column.
Read More
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