Industrial production of cast plastic lenses

Details Industrial production of cast plastic lenses Industrial production of cast plastic lenses

1978-02-27

1979-03-27

Wong, Jr., Harry

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

264 1, 351159, 526 74, 5262305, 5262321, 526279, 526314, 528484, 528491, C08F 1824, G02C 702

Patent

active

041466969

ABSTRACT:
The process of the preparation of production quantities of lens devices fabricated from synthetic resinous substances, normally referred to as "plastic lenses." The process utilizes a molding formulation which enables reusable mold cavities to be utilized, the formulation providing a proper balance between a number of processing parameters or variables, one of the primary parameters being the maintenance of a proper adherence or release capability between the surface of the lens being fabricated and the surface of the mold cavity. Specifically, it has been found that certain silanes when incorporated in the molding formulation controls the parameters so as to provide for controllable release of the lens product from the mold.

REFERENCES:
patent: 2445535 (1948-07-01), Parsons et al.
patent: 2445536 (1948-07-01), Parsons et al.
patent: 2701245 (1955-02-01), Lynn
patent: 3872042 (1975-03-01), Bond
patent: 3988274 (1976-10-01), Masuhara et al.

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