Plastic optical fiber, optical fiber cable, optical fiber...

Details Plastic optical fiber, optical fiber cable, optical fiber... Plastic optical fiber, optical fiber cable, optical fiber...

2006-08-29

2006-08-29

Pezzuto, Helen L. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S088000, C526S089000, C526S224000, C526S245000, C526S329700

Reexamination Certificate

active

07098281

ABSTRACT:
This invention provides a process for manufacturing a methyl methacrylate polymer comprising the steps of feeding a monomer containing at least 80 wt % of methyl methacrylate and a radical polymerization initiator represented formula (III) to a reactor; polymerizing the material at a polymerization temperature of 110 to 160° C. under the conditions satisfying particular equations between an initiator concentration and a polymerization temperature; feeding a reaction mixture taken out from the reactor to a devolatilization step (feeding step); and separating and removing volatiles from the reaction mixture (devolatilization step). A methyl methacrylate polymer having adequately good optical properties and a plastic optical fiber having improved transmission performance can be prepared according to this invention

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