Yesterday's entry on epichlorohydrin got us halfway to an epoxy resin, with the aid of good old bisphenol A. In that other tube, you'll often find some sort of amine, which, when mixed with a prepolymer like that formed with epichlorohydrin-bisphenol A, heats up and hardens.
This triamino-phenol is one hardener found in epoxy adhesives. It reacts further with the epichlorohydrin, giving a cross-linked, hard (or just firm) epoxy resin. It's also responsible for the smell you probably associate with epoxy.
- Log in to post comments
More like this
Yesterday's entry on epoxides may have brought to mind epoxies. The similarity isn't a coincidence. Chloromethylepoxide, or "epichlorohydrin," is the basis for many epoxy adhexives.
One tube contains some epoxide, such as epichlorohydrin, along with some bisphenol A - the very same stuff you find…
Researchers with CDC's National Institute for Occupational (NIOSH) report that nearly 16 percent of current asthma cases in US adults are work-related. The reported findings are based on data from the Behaviorial Risk Factor Surveillance System (BRFSS) Adult Asthma Call-back Survey (ACBS) and…
tags: ancient mushroom, amber, parasites, fossils
A 100-million-year-old piece of amber was recently found with an ancient mushroom embedded inside. The amber specimen was collected approximately one year ago in Burma by Ron Buckley, a registered nurse, photographer and collector of amber fossils…
I was mildly surprised at the reaction to this cool timelapse video of a molting crab — some people didn't understand how arthropods work. The only thing to do, of course, is to explain the molting process of insects and crustaceans, called ecdysis.
Let's go back to the basics first. In the…
[hangdonwheadinshame]Sorry, my ignorance of chemistry was revealed when the title of the posts suggested to me this has something to do with Vi*gra [/hangdonwheadinshame]