The process 1 wherein the cross linking agent comprises an oligourethane prepared by {HEAD ~ the reaction} of {TAIL ~ 1,3 dioxan} 5 hydroxy methyl 5 ethyl 2 one with an isocyanate functional compound comprising a member selected from the group consisting of polyisocyanates containing biuret groups, polyisocyanates containing isocyanurate groups, polyisocyanates containing uretdione groups, polyisocyanates containing urethane groups, polyisocyanates containing allophanate groups, and unmodified organic polyisocyanates having molecular weights of 140 to 300 g/mol 
The process 1 wherein the cross linking agent comprises an oligourethane prepared by { HEAD ~ the reaction } of { TAIL ~ 1,3 dioxan } 5 hydroxy methyl 5 ethyl 2 one with an isocyanate functional compound comprising a member selected from the group consisting of polyisocyanates containing biuret groups , polyisocyanates containing isocyanurate groups , polyisocyanates containing uretdione groups , polyisocyanates containing urethane groups , polyisocyanates containing allophanate groups , and unmodified organic polyisocyanates having molecular weights of 140 to 300 g / mol
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