Single-component coating having alkoxysilane-terminated N-substituted urea resins
AssigneeScience Applications International Corporation
InventorErick B. Iezzi
Life of this patent
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Abstract
The coating described herein attempts to provide this solution by synthesizing alkoxysilane-terminated N-substituted urea resins, then formulating them into moisture-curable single-component (1K) topside coatings. These coatings will provide greater external stability (to UV and visible radiation), cleanability, flexibility, cure times and lower VOC content than the currently qualified silicone alkyd topside coatings that are found on Navy ships. The single-component coating can include at least an alkoxysilane-terminated N-substituted urea resin, a reactive diluent, a pigment, a filler, and a catalyst. The resin can include an amino-functional silane substituted at the N-position and a non-aromatic isocyanate.
Claims16
A single-component coating comprising:
- an alkoxysilane-terminated N-substituted urea resin, formed by reacting (i) an aliphatic polyisocyanate and a mixture of (ii) an amino-functional siloxane which is substituted at the N-position with a group selected from C3-C6 alkyl, cyclohexyl, and phenyl and (iii) a disubstituted amine NR1R2, where each of R1 and R2 is independently an aliphatic, cycloaliphatic, or aromatic group;
- such that said resin has no free isocyanate groups;
- and further comprising a reactive diluent;
- a pigment;
- a filler;
- and a catalyst.
A resin formed by reacting
- (i) an aliphatic polyisocyanate and a mixture of (ii) an amino-functional siloxane which is substituted at the N-position with a group selected from C3-C6 alkyl, cyclohexyl, and phenyl and (iii) a disubstituted amine NR1R2, where each of R1 and R2 is independently an aliphatic, cycloaliphatic, or aromatic group;
- such that said resin has no free isocyanate groups.
A method for producing a single-component coating, the method comprising:
- synthesizing a resin from
- an aliphatic polyisocyanate and a mixture of (ii) an amino-functional siloxane which is substituted at the N-position with a group selected from C3-C6 alkyl, cyclohexyl, and phenyl and (iii) a disubstituted amine NR1R2, where each of R1 and R2 is independently an aliphatic, cycloaliphatic, or aromatic group;
- such that said resin has no free isocyanate groups;
- and
- mixing the synthesized resin with a reactive diluent, a pigment, a filler, and a catalyst.
Dependencies are inferred from the claim text.