US 7,512,309 B2
	Polymer composition, plastic optical fiber, plastic optical fiber cable, and method for manufacturing plastic optical fiber
Amane Aoyagi, Otake (Japan); Yoshihiro Tsukamoto, Otake (Japan); Keiji Iwasaka, Otake (Japan); and Keiichi Sakashita, Otake (Japan)
Assigned to Mitsubishi Rayon Co, Ltd., Tokyo (Japan)
Appl. No. 11/794,313 PCT Filed Dec. 27, 2005, PCT No. PCT/JP2005/023939 § 371(c)(1), (2), (4) Date Jun. 27, 2007, PCT Pub. No. WO2006/070824, PCT Pub. Date Jul. 06, 2006.
Claims priority of application No. 2004-377186 (JP), filed on Dec. 27, 2004; application No. 2005-073121 (JP), filed on Mar. 15, 2005; and application No. 2005-258279 (JP), filed on Sep. 06, 2005.
Prior Publication US 2008/0166091 A1, Jul. 10, 2008
Int. Cl. G02B 6/00 (2006.01)

U.S. Cl. 385—145  [385/143]

14 Claims

1. A polymer composition comprising 5 to 100% by mass of a unit (A) of a lactone compound represented by a general formula (1) and 0 to 95% by mass of a unit (B) of (meth)acrylate as constitutional units, wherein the unit (A) of lactone compound comprises a unit of an (S) isomer represented by a general formula (2) and a unit of an (R) isomer represented by a general formula (3) at a mass ratio of from 70/30 to 30/70, and wherein the polymer composition has a total light scattering loss of not more than 100 dB/km, wherein, in the formulae (1) to (3), R1 represents a methyl group, an ethyl group, or a propyl group; and R2 and R3 independently represent a hydrogen atom, a C1-12 alkyl group that may be unsubstituted or substituted with one or more than two fluorine atoms, a phenyl group that may be unsubstituted or substituted with one or more than two alkyl groups, or a cyclohexyl group that may be unsubstituted or substituted with one or more than two fluorine atoms, or alternatively R2 and R3 may unite each other to form a 5- or 6-membered ring including the carbon atom to which R2 and R3 are bonded, where the 5- or 6-membered ring may be substituted with one or more than two fluorine atoms.