Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1976-05-26
1978-07-04
Cockeram, H.S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 22TN, 260 294R, 260 292N, 260 302, 260 328N, 260830P, 260849, 260858, 528 80, 528354, C08G 1842, C08G 6308, C08K 302
Patent
active
040987434
ABSTRACT:
Water-soluble polylactones and poly(lactone-urethanes) are disclosed. The polylactones are prepared by ring opening a lactone such as epsilon-caprolactone with a low equivalent weight active hydrogen-containing material having at least two active hydrogen groups per molecule selected from the class consisting of hydroxyl, primary amine, secondary amine and thiol, and having anionic water-solubilizing groups or groups which are readily reacted to form anionic water-solubilizing groups. The resulting polylactone can be combined with curatives such as amine-aldehyde condensates to form water-soluble coating compositions and can be reacted with polyisocyanates to form unique water-soluble poly(lactone-urethanes, ureas or thiolurethanes) which are also useful for coating applications.
Surprisingly, it has been found that the polyurethanes prepared by reacting organic polyisocyanates with the novel polylactone adducts of the present invention and optionally low molecular weight diols are more water dispersible and form coatings with greater adhesion to the substrate and less water sensitivity than comparable polyurethanes prepared by reacting organic polyisocyanates with conventional polylactone diols and low equivalent weight active hydrogen-containing materials which also have anionic water-solubilizing groups.
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Chang Wen-Hsuan
Scriven Roger L.
Cockeram H.S.
PPG Industries Inc.
Uhl William J.
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