申请人:3M INNOVATIVE PROPERTIES COMPANY
公开号:US10858558B2
公开(公告)日:2020-12-08
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.
所提供的密封剂组合物包括第一组分和第二组分。第一组分含有聚硫化物、聚硫醚或含有悬挂或末端硫醇基团的共聚物或其组合,而第二组分含有乙烯不饱和化合物,第一或第二组分还含有光引发剂。或者,第二组份可以含有聚环氧化物,第一或第二组份可以含有光柔性碱和光敏剂。第一或第二组份还含有一种着色剂,可在 350 纳米到 500 纳米的波长范围内基本反射或基本透过光。这些组合物可提供按需固化的密封剂配方,符合 B 级密封剂对颜色的规定,提供可接受的固化深度,并使双组分混合易于区分。