公开(公告)号：US20250066646A1

公开(公告)日：2025-02-27

申请号：US18720807

申请日：2022-12-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kerstin Unverhau ,  Silke D. Mechernich ,  Frank Kuester ,  Olaf W. van GAnsewinkel ,  Hans Peter Dette

IPC: C09J133/08 ,  C08F220/06 ,  C08F220/14 ,  C08F220/18 ,  C08F222/10 ,  C09J5/08 ,  C09J133/12

Abstract: An adhesive film includes a first (meth)acrylate copolymer containing at least 55 weight percent (wt. %) of linear or branched alkyl (meth)acrylate monomer units, from 15 to 40 wt. % of (meth)acrylic acid monomer units, and 0.1 to 5 wt. % of monomer units of a crosslinking monomer having more than one (meth)acrylate group. If the first (meth)acrylate copolymer comprises 15 wt. % (meth)acrylic acid monomer units, the first (meth)acrylate copolymer comprises at least five wt. % monomer units of a high Tg monomer. The adhesive film comprises not more than five wt. % of a further (meth)acrylate copolymer comprising from 0.1 to 15 wt. % of (meth)acrylic acid monomer units. The adhesive film can be a multilayer adhesive assembly including a first layer of the first (meth)acrylate copolymer and a second adhesive layer adjacent to the first layer. A process for making and a system including the adhesive film and a primer are also described.

公开(公告)号：US20250051614A1

公开(公告)日：2025-02-13

申请号：US18720307

申请日：2022-12-15

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Alexander J. Kugel ,  Nicholas W. Lang ,  Tzu-Yu Lai ,  Dean A. Miner ,  Matthew T. Holbrook ,  Scott M. Spear ,  Kristen L. Bellmer ,  Frank Kuester ,  Hans Peter Dette ,  Kerstin Unverhau ,  Silke Mechernich ,  Duane D. Fansler ,  Anthony F. Schultz ,  Jonathan E. Janoski

IPC: C09J7/35 ,  C09J7/26 ,  C09J7/29

Abstract: An adhesive system comprising a tape and an activator, wherein the activator includes an oxidizing agent and is a liquid at normal temperature and pressure; and wherein the tape includes a curable adhesive free-standing film adjacent to a curable foam support layer, wherein the curable adhesive free-standing film comprises: a) a film-forming polymer or oligomer; b) a species comprising unsaturated free-radically polymerizable groups, which may be a) or a species other than a); and c) a transition metal cation.