Increasing the useful range of cationic photoinitiators in stereolithography
US5705116A · kind A · utility
18Cited by
4References
8Claims
0Family size
Inventors
Key dates
| Filing date | Jun 21, 1995 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Jun 21, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y30/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective mount of a cationic photoinitiator and an ultraviolet light-absorbing compound to provide a predetermined depth of cure. Preferably, the ultraviolet light-absorbing compound is anthracene or its derivatives. Anthracenes having pendant alkoxy groups are preferred for use with light wavelengths greater than 360 nm, particularly 9,10-dimethoxy-2-ethyl anthracene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.