Ultraviolet light (UV) absorbing compounds and compositions containing UV absorbing compounds
US7381762B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2004 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Mar 16, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D249/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Hydroxybenzotriazole-based compounds are useful for ultraviolet light absorbing additives for a variety of applications. Such compounds have particular usefulness in various applications, including plastics, automotive, coatings, and food packaging applications. Such inventive compound exhibit excellent UV radiation absorbing activity, high thermal stability, excellent low fogging, low extraction/low migration rates, and high lightfastness levels, particularly when incorporated within certain media and/or on the surface of certain substrates, particularly polyesters, polyolefins, and polyurethanes. Block copolymer chain or chains consisting of poly(oxyalkylene) and/or aliphatic polyester segments can be conveniently tailored to increase the solubility or compatibility in different solvents or resins thereby permitting the introduction of such excellent UV absorbing chromophores within diverse media and/or or diverse substrates. Compositions and articles comprising such compounds are provided as well as methods for producing such inventive compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.