公开(公告)号：US20220403215A1

公开(公告)日：2022-12-22

申请号：US17638300

申请日：2020-08-25

Applicant: Bostik, Inc.

Inventor： David P. Keuler ,  Cory C. Bausch ,  Mark D. Alper

IPC: C09J7/38 ,  E04D12/00 ,  C09J7/40 ,  C09J11/04 ,  C09J11/08 ,  C09J119/00 ,  C09J125/08 ,  C09J153/00

Abstract: A roofing underlayment capable of adhering to a roof deck comprising: (a) a roofing membrane having a first and a second major surface; and (b) a pressure-sensitive adhesive disposed on the first major surface of the roofing membrane and comprising: (i) at least one of butyl rubber or polyisobutylene; (ii) a first liquid plasticizer, preferably polybutene; and (iii) a tackifier, wherein the Tg of the adhesive is at most about 100 C. The adhesive provides high bond strength and excellent long-term heat aging, weathering resistance, as well as good low temperature properties while providing a moisture proof seam. A method for making the roofing underlayment includes applying the adhesive to the membrane then applying a release liner over the adhesive layer. A method for using the roofing underlayment comprises removing the release liner then adhering the underlayment to the roof deck by contacting the first to the roof deck.