Compounds of the formula wherein R1=H, CH3 R2=H, CH3, CH2CH3, or CH2CH2CH3 n=1-10 X=halogen, (C1-C6) alkyl, (C1-C6) alkoxy, or aromatic radical are shown to be useful as coupling agents or adhesion promotors in free radically curable compositions such as UV curable and peroxide curable (meth)acrylate based coating compositions. The associated methods, curable compositions, coatings, adhesives and coated articles are also disclosed.