Coating processes – Nonuniform coating – Edge or border coating
Patent
1994-03-21
1996-07-09
Dudash, Diana
Coating processes
Nonuniform coating
Edge or border coating
427300, 427422, 427397, 427291, B05D 102, B05D 310, B05D 708
Patent
active
055342957
ABSTRACT:
Polyurea/polyurethane coatings can be applied in situ to the edges of substrates without the need for adding any additives to increase flowability or moldability. The in situ application utilizes the extremely fast cure time of polyurea/polyurethanes to provide a method for efficiently creating an article with a protected edge coat by spray applying polyurea/polyurethane to wood substrates. The polyurea/polyurethane will adhere solidly to the substrate, and is applied with sufficient thickness to provide resistance to chemical, environmental, or physical stresses perpendicularly and angularly directed at the edge. The method utilizes a spray gun at high temperature and pressure, combining isocyanate and amine components of the polyurea/polyurethane coating at the nozzle and impinging the combined components onto the edge to be treated. The product of this process gives off no volatile organic compounds (VOCs), is odor free, peel resistant, and sterilized.
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Barton Mark S.
Schlichter Mark E.
August Lotz Co., Inc.
Dudash Diana
Litman Richard C.
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