Photopolymerizable compositions including a urethane component and a reactive diluent, articles, and methods
US11584827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2018 |
| Grant date | Feb 21, 2023 |
| Priority date | — |
| Expiry date | Jul 29, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/1025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure provides a photopolymerizable composition comprising 50-90 wt % of at least one urethane component, 5-50 wt % of at least one reactive diluent, 0.1-5 wt % of a photoinitiator, and optionally an inhibitor, wherein said composition has a viscosity at a temperature of 40 degrees Celsius of 10 Pa·s or less, as determined using a magnetic bearing rheometer using a 40 mm cone and plate measuring system at a shear rate of 0.1 l/s. The present disclosure also provides an article including the reaction product of the photopolymerizable composition, in which the article exhibits an elongation at break of 25% or greater. Further, the present disclosure provides a method of making an article including (i) providing a photopolymerizable composition and (ii) selectively curing the photopolymerizable composition to form an article. The method optionally also includes (iii) curing unpolymerized urethane component and/or reactive diluent remaining after step (ii). Further, methods are provided, including receiving, by a manufacturing device having one or more processors, a digital object comprising data specifying an article; and generating, with the manufacturing device by a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.