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AssigneeRohm and Haas Company
InventorsLinda A. Adamson, Richard F. Merritt, Asare Nkansah, Jungsik Lee
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A method for extending the open time of an aqueous coating composition is provided. This method extends the time during which an aqueous coating can be applied or rebrushed without damaging the film. The open time improvement of this invention is useful for a variety of coatings including paints, stains, varnishes, adhesives, and inks. The aqueous coating composition contains a latex polymer and a modifying compound. More particularly, the latex polymer contains a first reactable group which is complementary to and reacts with a second reactable group in the modifying compound. The complementary reactable groups in the latex polymer and modifying compound provide ionic or covalent binding.
A method for extending the open time of an aqueous coating comprising:
An aqueous coating composition having extended open time comprising a latex polymer and a modifying compound where the latex polymer consists of a first reactable group which is complementary to and combined with a second reactable group in the modifying compound.
A method of using a modifying compound containing a reactable group for extending the open time of an aqueous coating composition containing a latex polymer having a reactable group which is complementary to the reactable group in the modifying compound.
Dependencies are inferred from the claim text.