Patent ID: 8940833
Filing Date: 2015-01-27
Classification: C09J,Y10T

Abstract:
1. A pressure sensitive, non-biodegradable adhesive (PSA) comprising: (A) 50 to 99 weight percent (wt %) of an aromatic polyester comprising at least two hydroxyl groups per polymer chain and selected from the group consisting of polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyethylene naphthalene and combinations of two or more of these polyesters, polyesters having a: (B) 1 to 40 wt % of at least one of a plasticizer or tackifier; and (C) 0.1 to 10 wt % of crosslinkers having an average 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; (iv) Melt flow in excess of 70° C.; and (v) Self-adhesion failure temperature from 124° C. to 167° C.