Polyester-Based, Pressure Sensitive Adhesive

Abstract

A pressure sensitive adhesive (PSA) comprising: (A) 50 to 99 weight percent (wt %) of a partially aromatic polyester comprising at least two hydroxyl groups per polymer chain and having a: (1) Storage modulus of >0.33 Megapascals (MPa) at 23° C., (2) Mn of 20,000 to 200,000 grams per mole (g/mol), and (3) Glass transition (Tg) temperature of −60° C. to 20° C.; (B) 1 to 40 wt % of at least one of a plasticizer or tackifier; and (C) 0.1 to 10 wt % of a crosslinker with a functionality of >2.5; with the provisos that the PSA has a: (i) Tg of −60° C. to 10° C.; (ii) Storage modulus of <0.33 MPa at 23° C.; (iii) Rubbery plateau in excess of its Tg; and (iv) Melt flow in excess of 70° C.

Dependencies are inferred from the claim text.