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1. A cross-linked ethylene propylene diene terpolymer latex with a customer specified solids content from 30 weight percent to 60 weight percent based on the total weight of the latex, the cross-linked ethylene propylene diene terpolymer latex comprising:
a. 15 weight percent to 88 weight percent of a premixed ethylene propylene diene terpolymer component in 50 weight percent to 96 weight percent of a solvent, wherein the terpolymer component has a molecular weight from 1300000 Mw to 5000 Mw, and consists of:
(i) 4 weight percent to 50 weight percent of random covalently linked monomers of ethylene and propylene having weight ratios from 40:60 to 85:15 of ethylene:propylene respectively; and(ii) 0.25 weight percent to 15 weight percent of the polymer component is a non-conjugated diene; b. 10 weight percent to 70 weight percent of a water, wherein the water is selected from the group consisting of: distilled water, deionized water, tap water, process water, and combinations thereof; c. 1 weight percent to 30 weight percent of a surfactant; and d. at least a portion of at least one of: a sulfur donative curative and a free radical generating curative, wherein the portion is within a weight percent from 0.3 weight percent to 1.76 weight percent of a total amount of curative used in the formulation, thereby forming a cross-linked ethylene propylene diene terpolymer miscible with acrylic, urethane, alkyd, and epoxy lattices; and
wherein upon heating, the formulation crosslinks and if the formulation has a cross link density less than 50 percent when at least 99 percent of the water is removed from the latex as determined by ASTM test D3616 effective 2014, adding an additional portion of curative and heating a second time forming a dehydrated latex which when applied to a substrate, exhibits: a glass transition temperature of −50 degrees Celsius to −40 degrees Celsius; an impact resistance as measured by a falling dart test that has less than a 50 percent failure at 20 inch-pound at an ambient temperature; a moisture barrier of less than 1.0 perm unit as determined by ASTM D 1735 effective 2014 preventing penetration of water to a substrate; and providing a color change of delta E of less than 5 as measured by the accelerated weathering tests ASTM G 154 and ASTM D 3632 both with effective dates of 2014. |
