Stabilized adhesive compositions containing highly soluble, photostable benzotriazole UV absorbers and laminated articles derived therefrom
US6268415A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | May 3, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Adhesive compositions are rendered stable against degradation caused by ultraviolet light through the incorporation of a highly soluble, photostable benzotriazole UV absorber which is substituted in the ortho position of the hydroxyphenyl ring by .alpha.-cumyl or phenyl. Examples of such compounds are 2-(2-hydroxy-3-.alpha.-cumyl-5-tert-octylphenyl)-2H-benzotriazole, 5-chloro-2-(2-hydroxy-3-.alpha.-cumyl-5-tert-octylphenyl)-2H-benzotriazole , 5-fluoro-2-(2-hydroxy-3-.alpha.-cumyl-5-tert-octylphenyl)-2H-benzotriazole , 2-(2-hydroxy-3-.alpha.-cumyl-5-tert-butylphenyl)-2H-benzotriazole, 5-chloro-2-(2-hydroxy-3-.alpha.-cumyl-5-tert-butylphenyl)-2H-benzotriazole and 5-fluoro-2-(2-hydroxy-3-.alpha.-cumyl-5-tert-butylphenyl)-2H-benzotriazole . These compounds exhibit excellent photostability and are highly soluble in adhesive formulations. The laminated articles derived from these compositions include, for example, solar control films, films and glazings, UV absorbing glasses and glass coatings, windscreens, retroreflective sheetings and signs, solar reflectors, optical films and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.