The process 1 wherein the cross linking agent comprises an oligourethane prepared by the reaction of 1,3 dioxan 5 hydroxy methyl 5 ethyl 2 one with an isocyanate functional compound comprising a member selected from {HEAD ~ 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 {TAIL ~ molecular weights} of 140 to 300 g/mol 
The process 1 wherein the cross linking agent comprises an oligourethane prepared by the reaction of 1,3 dioxan 5 hydroxy methyl 5 ethyl 2 one with an isocyanate functional compound comprising a member selected from { HEAD ~ 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 { TAIL ~ molecular weights } of 140 to 300 g / mol
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