Process for producing shaped articles having improved surfaces
US4550001A · kind A · utility
9Cited by
13References
14Claims
0Family size
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Inventors
Key dates
| Filing date | Mar 9, 1984 |
| Grant date | Oct 29, 1985 |
| Priority date | — |
| Expiry date | Mar 9, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing shaped articles having improved surfaces, characterized by subjecting a shaped article of a polymer derived from a monomeric material comprising an acrylate and/or methacrylate to at least one of a hot water treatment, an aqueous alkali solution treatment and an aqueous acid solution treatment. Shaped articles obtained by this process have an advantage that when the surfaces thereof are stained the removal of the stains is quite easy. Moreover, they are hydrophilic and have excellent wettability by water. Therefore, said shaped articles are extremely suitable for use as contact lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.