Benzyl Alcohol → Glutaraldehyde

Participants

Reaction Steps

It is apparent that simply heating 100% Polymer H at 60° to 95° C for more than 1 hour is not enough to achieve insolubility in 100% benzyl alcohol, but other tests with 4% benzyl alcohol showed that Polymer H crosslinked by heating was not soluble and could be used successfully for making a weak pod seal. Reaction with formaldehyde causes crosslinking and the product is insoluble but swells in 100% benzyl alcohol. Glyoxal and glutaraldehyde give tightly crosslinked products that are insoluble and swell very little in 100% benzyl alcohol. At the low concentration of benzyl alcohol in a photographic developer, these crosslinked compositions formed by heating, or those containing the hardeners and crosslinkers formaldehyde, glyoxal, ethylene diamine, and glutaraldehyde are acceptably resistant to solution.

Provenance & Evidence