Moisture-scavenging iminoalcohol-oxazolidine mixtures

A substantially anhydrous composition for use in preparing a moisture-curable polyurethane coating, adhesive or sealant comprising:

• at least one organic solvent;
• and
• at least one mole of a moisture scavenging compound for every mole of water to be dehydrated, the moisture scavenging compound being selected from the group consisting of:
• an iminoalcohol compound having the structure:
• ##STR11## an oxazolidine compound having the structure:
• ##STR12## a mixture of the iminoalcohol compound and the oxazolidine compound wherein:
• R.sub.1 and R.sub.2 are, individually, selected from the group consisting of a methyl or methylol group, an ethyl or ethylol group, and a branched or straight chain alkyl or alkanol group;
• R.sub.3, R.sub.4 and R.sub.5 are, individually, selected from the group consisting of a hydrogen atom, a methyl or methylol group, an ethyl or ethylol group, and a straight chain or branched chain alkyl or alkanol group;
• R.sub.6 is selected from the group consisting of a hydrogen atom, a methyl group, an ethyl group, and a straight chain or branched chain alkyl group;
• and R.sub.7 is selected from the group consisting of a hydrogen atom, a methyl or methylol group, an ethyl or ethylol group, a straight chain or branched chain alkyl or alkanol group, a cycloalkyl group, an acyl group and an aryl group, and wherein the concentration of the iminoalcohol compound is from 0 to 100 mole percent and the concentration of the oxazolidine compound is from 0 to 100 mole percent.

A method of dehydrating a preparation including at least one pigment and at least one organic solvent, comprising intimately admixing with the preparation at least one mole of a moisture scavenging compound for every mole of water to be dehydrated, the moisture scavenging compound being selected from the group consisting of:

• an iminoalcohol compound having the structure:
• ##STR13## an oxazolidine compound having the structure:
• ##STR14## a mixture of the iminoalcohol compound and the oxazolidine compound wherein:
• R.sub.1 and R.sub.2 are, individually, selected from the group consisting of a methyl or methylol group, an ethyl or ethylol group, and a branched or straight chain alkyl or alkanol group;
• R.sub.3, R.sub.4 and R.sub.5 are, individually, selected from the group consisting of a hydrogen atom, a methyl or methylol group, an ethyl or ethylol group, and a straight chain or branched chain alkyl or alkanol group;
• R.sub.6 is selected from the group consisting of a hydrogen atom, a methyl group, an ethyl group, and a straight chain or branched chain alkyl group;
• and R.sub.7 is selected from the group consisting of a hydrogen atom, a methyl or methylol group, an ethyl or ethylol group, a straight chain or branched chain alkyl or alkanol group, a cycloalkyl group, an acyl group and an aryl group, and wherein the concentration of the cycloalkyl group, an acyl group and an aryl group, and wherein the concentration of the iminoalcohol compound is from 0 to 100 mole percent and the concentration of the oxazolidine compound is from 0 to 100 mole percent.

A method of dehydrating a surface comprising:

• intimately admixing an organic solvent with at least one mole of a moisture scavenging compound for every mole of water to be dehydrated to form a preparation, wherein the moisture scavenging compound is selected from the group consisting of:
• an iminoalcohol compound having the structure:
• ##STR15## an oxazolidine compound having the structure:
• ##STR16## a mixture of the iminoalcohol compound and the oxazolidine compound wherein:
• R.sub.1 and R.sub.2 are, individually, selected from the group consisting of a methyl or methylol group, an ethyl or ethylol group, and a branched or straight chain alkyl or alkanol group;
• R.sub.3, R.sub.4 and R.sub.5 are, individually, selected from the group consisting of a hydrogen atom, a methyl or methylol group, an ethyl or ethylol group, and a straight chain or branched chain alkyl or alkanol group;
• R.sub.6 is selected from the group consisting of a hydrogen atom, a methyl group, an ethyl group, and a straight chain or branched chain alkyl group;
• and R.sub.7 is selected from the group consisting of a hydrogen atom, a methyl or methylol group, an ethyl or ethylol group, a straight chain or branched chain alkyl or alkanol group, a cycloalkyl group, an acyl group and an aryl group, and wherein the concentration of the iminoalcohol compound is from 0 to 100 mole percent and the concentration of the oxazolidine compound is from 0 to 100 mole percent;
• and
• applying the preparation to a surface to dehydrate the surface.