Polymerization regulators and compositions for resin

Details Polymerization regulators and compositions for resin Polymerization regulators and compositions for resin

2007-01-30

2007-01-30

Zimmer, Marc S. (Department: 1712)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S742000, C524S750000, C524S751000, C524S752000, C524S792000, C528S377000, C528S378000, C528S380000

Reexamination Certificate

active

10297383

ABSTRACT:
In the present invention, an episulfide compound having, in one molecule, at least one epithio structure represented by the following Formula 2:wherein R5is C1–C10 hydrocarbylene or single bond, R6, R7and R8are each independently C1–C10 hydrocarbyl or hydrogen, Y is O, S, Se or Te, p is an integer from 1 to 5 and q is an integer from 0 to 5,is polymerized in the presence of a halide of a 13–16 group element of the long periodic table and/or a polymerization regulator represented by the following Formula 1:wherein R1, R2and R3are each C1–C10 hydocarbyl or hydrogen, R4is C1–C10 hydrocarbylene or single bond, X is F, Cl, Br, I, As, SH, OH, C1–C10 alkoxyl, C1–C10 alkylthio, or C1–C10 mercaptoalkythio, and m is an integer from 1 to 5,to produce a cured resin suitable as an optical material. By using the polymerization regulator, the polymerization rate of the episulfide compound can be suitably regulated to obtain a cured resin with less defect. By using the halide, the increase in the viscosity of the starting composition during the storage or the casting operation can be prevented.

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