Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1994-06-06
1997-10-07
Gallagher, John J.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
144347, 144348, 144352, 1563045, 156310, 156314, 1563313, 156335, 428 58, 428528, B32B 3500
Patent
active
056743386
ABSTRACT:
The invention comprises a method for joining pieces of unseasoned or undr wood, by finger jointing or other joining technique. The wood may have a moisture content above the fibre saturation point of the wood, and as high as 50% to 100% or higher moisture content. An adhesive having a sufficiently high molecular weight or viscosity to avoid adhesive degradation or migration due to moisture in the wood during forming and curing of the joint, or which will cure to achieve such a sufficiently high molecular weight or viscosity during forming and curing of the joint is employed. Optionally a cure promotor or chemical which increases the rate of cure of the adhesive may be used. Preferred adhesives are formaldehyde based adhesives. Preferred cure promotor or chemicals are ammonia or amine compounds, organic acids including low molecular weight carboxylic acids, and Lewis or Bronsted class acids.
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Phenolic Resin Wood Adhesives, Pizzi A., pp. 105 and 125.
Phenolic Resins, Knop A. and Pilato A., 1985, Preface, pp. 34-37.
Lomax Terence D.
Parker Jeffery R.
Plackett David V.
Taylor Jeremy B. M.
Gallagher John J.
Her Majesty The Queen In Right Of New Zealand/Secretary of Fores
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