Title:
OXYGEN-PERMEABLE HARD CONTACT LENS
Document Type and Number:
WIPO Patent Application WO/1984/000619
Kind Code:
A1
Abstract:
An oxygen-permeable hard contact lens obtained by cast-polymerizing a composition composed of 30 to 50 wt. % of alkyl (meth)acrylate, 10 to 40 wt. % of fluorine-containing monomer, 10 to 35 wt. % of silicone (meth)acrylate, 5 to 15 wt. % of unsaturated carboxylic acid, and 0.1 to 15 wt. % of di(meth)acrylate or tri(meth)acrylate of polyhydric alcohol according to a process of continuously or stepwise raising the temperature from 40 to 100oC, and subjecting the resulting product to ordinary machining and abrading to form lens. This lens has excellent staining resistance, flawing resistance, and hydrophilicity.
Inventors:
KAWAMURA KAZUNORI (JP)
YAMASHITA SHINICHI (JP)
YOKOYAMA YUICHI (JP)
TSUCHIYA MAKOTO (JP)
YAMASHITA SHINICHI (JP)
YOKOYAMA YUICHI (JP)
TSUCHIYA MAKOTO (JP)
Application Number:
PCT/JP1983/000237
Publication Date:
February 16, 1984
Filing Date:
July 25, 1983
Export Citation:
Assignee:
HOYA LENS CORP (JP)
International Classes:
C08F2/00; C08F2/02; C08F20/00; C08F20/22; C08F30/00; C08F30/08; C08F220/00; C08F220/10; G02B1/04; G02C7/04; (IPC1-7): G02C7/04
Foreign References:
| JPS4856532A | 1973-08-08 | |||
| JPS5455455A | 1979-05-02 | |||
| JPS5466853A | 1979-05-29 | |||
| JPS54118455A | 1979-09-13 | |||
| JPS5515110A | 1980-02-02 | |||
| JPS55102613A | 1980-08-06 | |||
| JPS56118408A | 1981-09-17 | |||
| JPS587124A | 1983-01-14 | |||
| JPS587418A | 1983-01-17 |
Other References:
See also references of EP 0114894A4
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