Polymerisable compositions for making transparent polymer substrates, resulting transparent polymer substrates and uses thereof in optics
US6794474B2 · kind B2 · utility
1Cited by
6References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2003 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Dec 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/937
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is a composition comprising: 40 to 95 parts by weight of one or several monomers (I) of formula (a) wherein: R1 and R2 represent H or CH; A represents a divalent radical of formula (b) or (c) wherein m1 and m2 represent each an integer ranging between 2 and 6; and 5 to 50 parts by weight of a monomer (II) comprising at least a urethane unit and at least two (meth)acrylate functions. The invention is useful for making optical and ophthalmic articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.