%0 Journal Article
%T Factor Affecting Gel Time/Process-Ability  of Urea Formaldehyde Resin Based  Wood Adhesives
%A Ravindra V. Gadhave
%A Prakash A. Mahanwar
%A Pradeep T. Gadekar
%J Open Journal of Polymer Chemistry
%P 33-42
%@ 2165-6711
%D 2017
%I Scientific Research Publishing
%R 10.4236/ojpchem.2017.72003
%X Urea-formaldehyde (UF) resin presents the most utilized adhesive system in the manufacture of plywood, particleboard and fiberboard. At the temperatures above 100ˇăC in the presence of hardener, this resin undergoes cross-linking reaction and the formation of three dimensional cross linked structures takes place and bonding of wood particles in a hot press [1]. UF powder resins show high reactivity and good performance in the production and by their low price; however they lack in water resistance of the hardened resin [2]. Urea-formaldehyde (UF) resins are the most important type of adhesive resins for the production of wood based panels but process-ability and curing behavior of urea formaldehyde resin depended on various factors related to resin properties, types of wood and their properties, amount & type of catalyst, types and amount of polymers addition and environmental conditions [3]. This factor decides the process-ability of UF resin based composite during manufacturing of plywood, particle board and fiberboard. In this review paper, various factors affecting gel time and process-ability of UF resin based wood composite are reviewed.
%K Urea Formaldehyde Resins
%K Catalysts
%K Gel Time
%K Wood
%K pH
%K Polyvinyl Acetate
%K Composite
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=76675