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Patents

Polyurethane Sealant for Unprimed Substrates

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Polyurethane Sealant for Unprimed Substrates
● Patent No. Europe 1 155 093 A
A polyurethane sealant for use with unprimed substrates, especially
automotive window glass and painted plastic, metal, fiberglass and composites,
has been patented by Dow Chemical Company. It is comprised of a
urethane prepolymer, NCO functionality at least two, wt. av. MW at least
2000, tin catalyst, organophosphite stabilizer with alkaryl ligand or
aliphatic ligand and aromatic ligand, and silane functionality or silane
compound. Use is claimed in this patent.

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