Increasing the yield of cast plastic lenses

Details Increasing the yield of cast plastic lenses Increasing the yield of cast plastic lenses

1974-02-11

1976-03-16

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

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

260 8081, 264300, 264331, 351160, B29D 1100

Patent

active

039446379

ABSTRACT:
A terpolymer plastic lens having equal or greater light transmission, greater hardness and scratch resistance equal to the monomers used in prior art plastic lenses is obtained by the co-polymerization of diethylene glycol bis (allyl carbonate), methyl methacrylate and methacrylic acid or acrylic acid.

REFERENCES:
patent: 2542386 (1951-02-01), Beattie
patent: 3422168 (1969-01-01), Bowser
patent: 3465076 (1969-09-01), Asami et al.

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