Polylactone-polyurethanes and aqueous dispersions thereof
First Claim
1. In a process which comprises reactting a lactone of the formula:
- ##STR7## wherein n is an integer of from 4 to 6, and wherein at least (n+2) R'"'"'s are hydrogen and wherein the remaining R'"'"'s are of the group consisting of hydrogen, alkyl, cycloalkyl, alkoxy and single ring aromatic hydrocarbon radicals with an active hydrogen-containing material so as to produce a polylactone having recurring ##STR8## moieties in the polymer backbone, wherein the variables n and R have the aforesaid meanings, the improvement comprising;
reacting the lactone with an active hydrogen-containing material having at least 2 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;
said active hydrogen-containing material having an ionic equivalent weight of less than 1000, the equivalent ratio of lactone to active hydrogen-containing material being at least 0.5;
1.
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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.
34 Citations
20 Claims
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1. In a process which comprises reactting a lactone of the formula:
- ##STR7## wherein n is an integer of from 4 to 6, and wherein at least (n+2) R'"'"'s are hydrogen and wherein the remaining R'"'"'s are of the group consisting of hydrogen, alkyl, cycloalkyl, alkoxy and single ring aromatic hydrocarbon radicals with an active hydrogen-containing material so as to produce a polylactone having recurring ##STR8## moieties in the polymer backbone, wherein the variables n and R have the aforesaid meanings, the improvement comprising;
reacting the lactone with an active hydrogen-containing material having at least 2 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;
said active hydrogen-containing material having an ionic equivalent weight of less than 1000, the equivalent ratio of lactone to active hydrogen-containing material being at least 0.5;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- ##STR7## wherein n is an integer of from 4 to 6, and wherein at least (n+2) R'"'"'s are hydrogen and wherein the remaining R'"'"'s are of the group consisting of hydrogen, alkyl, cycloalkyl, alkoxy and single ring aromatic hydrocarbon radicals with an active hydrogen-containing material so as to produce a polylactone having recurring ##STR8## moieties in the polymer backbone, wherein the variables n and R have the aforesaid meanings, the improvement comprising;
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10. In an ungelled polyurethane comprising the reaction product of an organic polyisocyanate and a polylactone, the improvement comprising employing a polylactone formed from reacting a lactone of the formula:
- ##STR10## where n is an integer of from 4 to 6, and where at least (n+2) R'"'"'s are hydrogen, and the remaining R'"'"'s are of the group consisting of hydrogen, alkyl, cycloalkyl, alkoxy and single ring aromatic hydrocarbon radicals with an active hydrogen-containing material so as to produce a polylactone having recurring ##STR11## moieties in the polymer backbone, wherein the variables n and R have the aforesaid meanings;
said active hydrogen-containing material having at least 2 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 and having an ionic equivalent weight of less than 1000, the equivalent ratio of lactone to active hydrogen-containing material being at least 0.5;
1. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- ##STR10## where n is an integer of from 4 to 6, and where at least (n+2) R'"'"'s are hydrogen, and the remaining R'"'"'s are of the group consisting of hydrogen, alkyl, cycloalkyl, alkoxy and single ring aromatic hydrocarbon radicals with an active hydrogen-containing material so as to produce a polylactone having recurring ##STR11## moieties in the polymer backbone, wherein the variables n and R have the aforesaid meanings;
Specification