Procedure to regulate the polymerization of the urea-formol resins and to be maintained in a liquid condition for her hardening in contact with the air and at the ambient temperature (Machine-translation by Google Translate, not legally binding)

摘要

Procedure to regulate the polymerization of the urea-formaldehyde resins and to be maintained in the liquid state, for hardening in contact with air and at room temperature, being characterized by being reacted for thirty minutes in an open container: technical urea (47%), 250grs .; crystallized phenol, 5grs .; zinc chloride powder, 75grs .; formaldehyde sun 40%, previously neutralized with 24º ammonia, 485grs. (Machine-translation by Google Translate, not legally binding)