公开(公告)号：US20190256751A1

公开(公告)日：2019-08-22

申请号：US16340365

申请日：2017-11-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Erik M. TOWNSEND ,  Sheng YE ,  Jonathan D. ZOOK ,  Michael D. SWAN

IPC: C09J181/02

Abstract: Provided are sealant compositions that include a first component and second component. The first component contains a polysulfide, a polythioether, or a copolymer or combination thereof containing pendant or terminal thiol groups, while the second in component contains an ethylenically-unsaturated compound and either the first or second component further contains a photoinitiator. Alternatively, the second component can contain a polyepoxide and either the first or second component can contain a photolatent base and a photosensitizer. The first or second component further contains a colorant that substantially reflects or substantially transmits light over the wavelength range from 350 nm to 500 nm. These compositions can provide cure-on-demand sealant formulations that comply with Class B sealant regulations on color, provide an acceptable depth of cure, and allow two-part mixing to be easily distinguishable.