C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
117/195, 400/741
C08G 18/42 (2006.01) B32B 27/08 (2006.01) C08G 18/75 (2006.01)
Patent
CA 1160789
Abstract of the Disclosure A liquid heat and moisture reactive coating composition, especially adapted for forming a no-wax coating on plastic flooring products. The coating is a solvent solution of a polyester having an acid number of less than about 3 and an average hydroxyl equivalent weight of between about 750 to 1400 and an aliphatic diisocyanate. The polyester is based on a mixture of dicarboxylic acids of which at least 75 weight percent is one or more of the isomeric benzene dicarboxylic acids and a mixture of polyols having a hydroxyl equiva- lent weight of less than about 130. Of the polyol mix- ture, at least 60 weight percent is 1,6-hexanediol or 1,5-pentanediol or mixtures thereof with no more than 15 weight percent being polyols having a functionality greater than 2. Based on 100 parts by weight reactants, 55 to 90 parts by weight of said polyester is reacted with 10 to 30 parts by weight of an aliphatic diiso- cyanate in the presence of 0.01 to 5 parts by weight organotin catalyst and the coating may also contain up to 15 parts by weight of polyol reactants having a hydroxyl equivalent weight of up to 600 in addition to the polyester.
365174
Armstrong World Industries Inc.
Gowling Lafleur Henderson Llp
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