An adhesive coated article comprises a layer of microsphere adhesive onto a portion of at least one major surface of a substrate. The microspheres in the adhesive are obtained as the reaction product of (a) at least one alkyl (meth)acrylate ester wherein the alkyl group contains four to about 14 carbon atoms, preferably four to about 10 carbon atoms and (b) a comonomer(s). The comonomer may be a nonpolar, ionic, polar comonomer or mixtures of such monomers. This microsphere adhesive either contains a (meth)acrylamide comonomer or a polyacrylamide material is post-added to the microsphere adhesive. The adhesive exhibits a lower than expected adhesion to coated papers without sacrificing the adhesion to standard uncoated (bond) papers and the 90° peel adhesion, as measured on Kromkote® paper (used as an industry standard) is in the range of 20 to 250 grams/inch.
一种涂有粘合剂的物品包括在基材的至少一个主要表面的一部分上涂上一层微球粘合剂。粘合剂中的微球是由(a)至少一种烷基(甲基)
丙烯酸酯和(b)一种(或多种)共聚单体反应生成的,其中烷基含有 4 至 14 个碳原子,最好是 4 至 10 个碳原子。共聚单体可以是非极性、离子性、极性共聚单体或此类单体的混合物。这种微球粘合剂要么含有(甲基)
丙烯酰胺共聚单体,要么在微球粘合剂中后添加聚
丙烯酰胺材料。这种粘合剂对涂布纸的粘合力低于预期,但对标准非涂布(粘合)纸的粘合力却没有降低,在 Kromkote® 纸(用作行业标准)上测得的 90° 剥离粘合力在 20 至 250 克/英寸之间。