Waterborne epoxy coatings

Many of the attributes of solvent-borne epoxy coatings could be carried over to the waterborne epoxy coatings. These same attributes are useful in the application of waterborne epoxies as adhesive systems. They include good adhesion to a variety of substrates such as metals, wood, concrete, glass, ceramics, and many plastics chemical resistance low shrinkage toughness and flexibility and abrasion resistance. 

Waterborne epoxy coatings and adhesives have established the building and construction industry as their largest market. Commercial systems have been available for many years. The following characteristics propel their use over conventional alternatives ... 

Levulinic acid can be converted by known processes to the solvents, tetrahydrofuran and 2-methylfuran, to succinic acid, to 5-aminolevulinic acid for weed control (see Chap. 11) and to diphenolic acid. Diphenolic acid may be useful in waterborne epoxy coatings and other resins. If a suitable acid catalyst that can be left in the resin can be found, it may be possible to convert diphenolic acid, by self-acylation, to an analogue of phenol-formaldehyde resins, thus eliminating the use of the carcinogenic... 

Matos-Ruiz, M., Cavaille, J.-Y., Dufresne, A., Graillat, C., Gerard, J.-F. New waterborne epoxy coatings based on cellulose nanofillers. Macromol. Symp. 169, 211-222 (2001)... 

Chem. Descrip. Proprietary polysiloxane-based defoamer in wh. spirit Uses Defoamer for nonaq. high-solids and waterborne epoxy coatings, alkyds, acrylics, PU, polyester, disp. adhesives, polymerization Regulatory DOT regulated SARA 311/312 reportable Properties Yel. clear liq. aromatic odor negligible sol. in water sp.gr. 0.80 dens. 6.7 Ib/gal vise. 15 cps flash pt. (PMCC) 55 C VOC 74.2% (EPA method 24) 100% act., 20.6% solids Use Level 0.2-1.0% on total wt. 

Roohani M, Habibi Y, Belgacem NM et al (2008) Cellulose whiskers reinforced polyvinyl alcohol copol Tners nanocomposites. Eur Polym J 44 2489-2498 Ruiz MM, Cavaille JY, Dufresne A et al (2000) Processing and characterization of new thermoset nanocomposites based on cellulose whiskers. Compos Interface 7 117-131 Ruiz MM, Cavaille JY, Dufresne A et al (2001) New waterborne epoxy coatings based on cellulose nanofillers. Macromol Symp 16 211-222 Saito T, Nishiyama Y, Putaux JL et al (2006) Homogeneous suspensions of individualized microfibrils from TEMPO-catalyzed oxidation of native cellulose. Biomacromolecules 7 1687-1691... 

In order to produce a waterborne epoxy coating, the resin must be made compatible with water. There are many methods used in achieving this and some are ... 

The latest achievements in the field are two-component paints produced without addition of auxiliary organic solvents. Two-component, waterborne epoxy coatings have properties similar to the coatings obtained from the use of solvent-based paints. 

Uses Curing agent intended for use with waterborne epoxy disp. in two-component, ambient-cure, waterborne epoxy coatings, esp. anticorrosive primers, white gloss enamels and clear coats... 

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