CROSS-LINKING AGENT COMPOSITION FOR WATER BASED POLYMER- ISOCYANATE WOOD ADHESIVE

摘要

PROBLEM TO BE SOLVED: To obtain a cross-linking agent composition which is used for water based polymer-isocyanate wood adhesives, exhibits a good compression shear adhesion strength in a hot water and boiling repeating-resistant test, and has excellent extremely low temperature storage stability at -20°C.;SOLUTION: This cross-linking agent composition for water based polymer- isocyanate wood adhesives comprises a polymeric MDI comprising 2,2'-MDI, 2,4'-MDI and 4,4'-MDI in a total amount of 65 to 90 wt.% and 2,2'-MDI and 2,4'-MDI in a total amount of ≤30 wt.%, and an active hydrogen compound containing one or more hydroxyl groups in the molecule in an amount of 2 to 5 wt.% based on the weight of the polymeric MDI. Herein, MDI represents diphenylmethanediisocyanate.;COPYRIGHT: (C)2002,JPO