Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DIC Corp
Original Assignee
Dainippon Ink and Chemicals Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dainippon Ink and Chemicals Co LtdfiledCriticalDainippon Ink and Chemicals Co Ltd
Priority to JP8665980ApriorityCriticalpatent/JPS5714441A/en
Publication of JPS5714441ApublicationCriticalpatent/JPS5714441A/en
PURPOSE: To produce a binder having excellent working strength and final strength without evolving malodor by causing 4, 5-dihydroxy ethylene urea, formaldehyde supplying material, urea and furfuryl alcohol to react.
CONSTITUTION: The pH of an aqueous soln. in reaction is kept at about 1W3 and the temp. at about 80W100°C. 4,5-Dihydroxy ethylene urea is expressed by the formula, and the molar ratio to formaldehyde is about 1.5W4mol expressed in terms of formaldehyde content with respect to 1mol of ethylene urea. The formaldehyde content with respect to urea is about 1.85W1.25 molar ratios, and the amount of addition of furfuryl alcohol is kept at about 70/30W95/5 by weight based on the total weight of the other components. The reaction is stopped by controlling the pH to about 5W8 in the final.
COPYRIGHT: (C)1982,JPO&Japio
JP8665980A1980-06-271980-06-27Binder for self-curing mold
PendingJPS5714441A
(en)
Formaldehyde based resin used in the manufacture of composite board, where the formaldehyde emissions of the composite board are at a level similar to that of wood