Laminates comprising weatherable coatings and primer compositions comprising a mixture of an acrylic polymer and a cellulosic ester

Claim 1

A multi-layered article comprising an acrylic substrate comprising at least 70% by weight of units having the formula: ##STR6## having coated on one surface thereof a composition comprising: (a) 10 to 85 percent by weight of an acrylic polymer comprising repeating units of the formula ##STR7## wherein R is H or CH 3 and R 4 is an alkyl group of 1 to 4 carbon atoms, said polymer having no more than 50% by weight of said repeating units having R 4 groups of more than 2 carbon atoms, (b) 15 to 90 percent by weight of cellulose esters of carboxylic acids, said esters having 0.5 to 5.5 percent by weight of unesterified hydroxyl groups, a viscosity at 25° C. of 300 to 10,000 centipoise, and an acyl content of no more than 56 percent by weight derived from carboxylic acids having 2 to 4 carbon atoms and no more than 20 percent by weight of said acyl content being derived from carboxylic acids having fewer than 3 carbon atoms, and (c) 0 to 65 percent by weight of an aliphatic epoxy compound, and coated over said composition an abrasion resistant coating comprising the cured product of an epoxy-terminated silane.