Process for the manufacture of moldings

Details Process for the manufacture of moldings Process for the manufacture of moldings

2005-02-01

2005-02-01

Vargot, Mathieu D. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

C264S496000, C522S078000, C523S106000

Reexamination Certificate

active

06849210

ABSTRACT:
The invention relates to a process for the manufacture of a molding comprising the steps ofa) preparing an aqueous solution comprising a water-soluble prepolymer having crosslinkable groups and a further polymer which is devoid of crosslinkable groups,b) introducing the solution obtained into a mold,c) triggering the crosslinking, andd) opening the mold such that the molding can be removed from the mold. According to the process of the invention moldings such as contact lenses may be manufactured with an improved quality and an improved overall yield.

REFERENCES:
patent: 4812173 (1989-03-01), Tsao et al.
patent: 5508317 (1996-04-01), Muller
patent: 5807585 (1998-09-01), Martin et al.
patent: 6008281 (1999-12-01), Yang et al.
patent: 6149842 (2000-11-01), Lally et al.
patent: 0 486 294 (1991-11-01), None
patent: 2 064 556 (1981-06-01), None
patent: 2 086 400 (1982-05-01), None
patent: WO 9926087 (1999-05-01), None
International Search Report.
Copy of PCT/EP Office Action (source of cited references) showing date of the action or date of dispatch.

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