Molded polymer article having a hydrophilic surface and process for producing the same
US6310116A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1998 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Sep 18, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J5/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molded polymer article comprises a main molded body having on the surface thereof a hydrophilic polymer layer, the article being obtained by polymerizing both a monomer having a hydrophilic group and coated on the surface of a hydrophilic mold, and a polymerizable composition consisting essentially of a monomer and/or oligomer and placed in the mold. The hydrophilic polymer layer has excellent adhesiveness to the main body of the molded polymer article and excellent durability, so that the high hydrophilic property can be maintained, even when the article is exposed to external forces such as friction, over a long period of time. The molded articles are therefore useful as, in particular, contact lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.