Zero/low voc dry erase coatings and other variations

{
  "publication_number": "US2018002546A1",
  "country": "US",
  "kind": "A1",
  "title": "Zero/low voc dry erase coatings and other variations",
  "abstract": "Multi-part and one-part dry erase compositions are disclosed herein, including methods of using such compositions to form low/zero volatile organic compound (VOC) dry erasable coatings. The multi-part dry erase composition comprises a mixture of a first part and a second part, wherein the first part comprises a curable epoxy resin, such as an aromatic epoxide with diglycidyl epoxy functionality, and the second part comprises an amine curing agent, such as cycloaliphatic polyamine. The one-part compositions comprise monomers, oligomers, and polymers of an aliphatic or aromatic isocyanate, such as a diisocyanate, and an amine curing agent, such as morpholine and derivatives thereof. The dry erase compositions have a VOC content of less than about 25 g/L. Dry erasable coatings also include the abilities to dry erase additional markings in addition to dry erase markers, to include, but not limited to, regular marker, permanent marker, pen, highlighter, crayon, and spray paints. The dry erasable coatings can also withstand wet erasing, cleaning, and deep cleaning, with more aggressive cleaning chemicals like acetone, xylene, and Goof-Off brand aerosol cleaner while still maintaining its dry erasable features.",
  "claims": [
    "1. A method of producing a dry erasable surface, said method comprising: providing a dry erase composition having a VOC content of less than about 25 g/L, said dry erase composition being selected from the group consisting of: a multi-part composition comprising a mixture of a first part and a second part, wherein said first part comprises a curable epoxy resin and said second part comprises an amine curing agent, said multi-part composition comprising greater than about 85% solids by weight; and a one-part composition comprising monomers, oligomers, and polymers of an aliphatic or aromatic isocyanate, and an amine curing agent, said one-part composition comprising greater than about 50% solids by weight; providing a substrate having a surface; forming a coating of said dry erase composition adjacent said substrate surface; and allowing said coating to cure under ambient conditions, wherein said cured coating has a surface, said coating surface being markable-erasable. 2. The method of claim 1, wherein said curable epoxy resin is an aromatic epoxide with diglycidyl epoxy functionality. 3. The method of claim 1, wherein said first part consists essentially of said curable epoxy resin. 4. The method of claim 1, wherein said amine curing agent in said multi-part composition is a cycloaliphatic polyamine. 5. The method of claim 1, said second part further comprising a polyamine epoxy adduct. 6. The method of claim 1, wherein said isocyanate is selected from the group consisting of hexamethylene diisocyanate, hexane diisocyanate, toluene diisocyanate, methylene diphenyl diisocyanate, isophorone diisocyanate, and mixtures thereof. 7. The method of claim 1, wherein said amine curing agent in said one-part composition is selected from the group consisting of morpholine, and morpholine derivatives. 8. The method of claim 1, wherein said substrate is selected from the group consisting of wood, Plexiglas, dry wall, painted surfaces, plastic, glass, melamine coatings, metal, slate, porcelain, ceramic, concrete, masonry, woven and nonwoven fabric, enameled surfaces, composites, and combinations thereof. 9. The method of claim 1, wherein said coating is substantially transparent. 10. The method of claim 1, wherein said dry erase composition further comprises a pigment or a dye. 11. The method of claim 1, wherein said cured coating is markable-erasable with dry erase markers and pens, permanent markers, crayons, highlighter markers, washable markers, regular markers, glues, spray paints, make-up, pencils, grease pencils, grease pens, finger paints, and adhesives without a solvent or cleaner. 12. The method of claim 1, wherein said dry erase composition is said multi-part composition, said providing a dry erase composition comprising: providing said first part comprising said curable epoxy resin; providing said second part comprising said amine curing agent; and mixing said first part and said second part to yield said dry erase composition, wherein the weight ratio of curable epoxy resin to amine curing agent in said composition is from about 1:4 to about 4:1. 13. The method of claim 1, further comprising: marking said cured dry erase coating surface with a marker, pen, pencil, or paint; and removing said marking without the use of water or applied solvents. 14. The method of claim 13, further comprising: cleaning said cured dry erase coating surface by contacting with a solvent selected from the group consisting of water, aqueous solutions, isopropyl alcohol, xylene, acetone, ethyleneglycol monohexylether, and mixtures thereof; and marking said cleaned dry erase coating surface with a marker, pen, pencil, or paint. 15. A dry erasable structure comprising: a substrate having a surface; and a dry erasable coating adjacent the substrate surface, said dry erasable coating being formed from a dry erase composition having a VOC content of less than about 25 g/L, said dry erase composition being selected from the group consisting of: a multi-part composition comprising a mixture of a first part and a second part, wherein said first part comprises a curable epoxy resin and said second part comprises an amine curing agent; and a one-part composition comprising monomers, oligomers, and polymers of an aliphatic or aromatic isocyanate, and an amine curing agent. 16. The structure of claim 15, wherein dry erase markers and pens, permanent markers, crayons, highlighter markers, washable markers, regular markers, glues, spray paints, make-up, pencils, grease pencils, grease pens, finger paints, and adhesives are removable from said dry erasable coating without water or applied solvent. 17. The structure of claim 15, said substrate surface having a color. 18. The structure of claim 17, wherein said dry erasable coating is substantially transparent, wherein said color is visible underneath said dry erasable coating. 19. A dry erase composition having a VOC content of less than about 25 g/L, said dry erase composition being selected from the group consisting of: a multi-part composition comprising a mixture of a first part and a second part, wherein said first part comprises a curable epoxy resin and said second part comprises an amine curing agent; and a one-part composition comprising monomers, oligomers, and polymers of an aliphatic or aromatic isocyanate, and an amine curing agent. 20. A kit for forming a dry erasable surface, said kit comprising: a first container containing a first part, said first part comprising a curable epoxy resin; a second container containing a second part, said second part comprising an amine curing agent; and instructions for mixing said first part and said second part together to form a dry erase composition having a VOC content of less than about 25 g/L, and applying said composition to a substrate to form a dry erasable coating, said coating having a dry erasable surface."
  ],
  "description_excerpt": "The present invention relates to dry erase coatings having zero or low VOC levels, and other variations.\n\nThe paint and coatings industry has recently been lowering the VOC (volatile organic compound) content and odor of various coatings for better marketability and installation specification compliance (LEED points and other such considerations). The main players in the field of dry erase paint are Idea Paint, Rustoleum and the labels offering the JML Products and Design products. Existing products have yet to go below the 25 g/L VOC threshold. Both JML Products and Design and Idea Paint have existing products in the 25-150 g/L VOC range.\n\nThis innovation will be the first low/zero VOC dry erase product, which is deemed as a major accomplishment in the dry erase paint market due to LEED point advantages and comfort of being around the product during installation and cure times, plus the additional benefits of common end-user errors like using a regular marker or a permanent marker (like Sharpie); or using a stringent chemical when wet erasing, deep cleaning, or accidental spillage or usage on their dry erase surface; plus the benefit of having a dry erase surface available for use without a multiple day waiting period, after installation.\n\nThe present invention is broadly concerned with a method of producing a dry erasable surface. The method comprises providing a dry erase composition having a VOC content of less than about 25 g/L, providing a substrate having a surface, forming a coating of the dry erase composition adjacent the substrate surface, and allowing the coating to cure/dry under ambient conditions.",
  "cpc": [
    "C09D 163/00",
    "B05D 2504/00",
    "B05D 3/007",
    "B05D 5/08",
    "B05D 7/06",
    "B05D 7/148",
    "B43L 1/00",
    "B43L 1/002",
    "C09D 7/00"
  ],
  "ipc": [
    "B05D 3/00",
    "B05D 7/06",
    "B05D 7/14",
    "B43L 1/00",
    "C09D 7/00"
  ],
  "inventors": [
    "Michael Heiman"
  ],
  "filing_date": "2014-03-07",
  "publication_date": "2018-01-04",
  "priority_date": "2013-03-07",
  "application_number": "US-201414201472-A",
  "family_id": "60806130",
  "cited_by_count": 2
}