Novel perfluoroalkyl vinyl ether compound, process for preparing copolymer by using the compound, and optical plastic materials comprising copolymer prepared by the process
The present disclosure provides, for example, a method that can produce a fluorolactone compound from hexafluoropropylene oxide or the like in a single step. The present disclosure relates to a method for producing a compound represented by formula (1):
wherein two R
1
are the same and each is a fluorine atom or a fluoroalkyl group,
the method comprising step A of reacting a compound represented by formula (2):
wherein R
1
is as defined above, with a compound (3) represented by formula (3-1) or the like:
wherein R
31
, R
32
, and R
33
are the same or different and each is a hydrogen atom or a C
1-10
alkyl group, or two of them are optionally linked to each other to form a ring optionally having one or more substituents,
in the presence of a fluorine compound (4) represented by formula (4-1) or the like:
MH
n
F
m
(4-1)
wherein M is a metal atom, n is 0 or 1, and the sum of the valence number of M and n is m, and
an organic solvent, provided that the compound represented by formula (3) is excluded from the organic solvent.
Novel perfluoroalkyl vinyl ether compound, process for preparing copolymer by using the compound, and optical plastic materials comprising copolymer prepared by the process
申请人:Hwang Taek Jin
公开号:US20050148800A1
公开(公告)日:2005-07-07
Disclosed herein are a novel perfluoroalkyl vinyl ether compound, a process for preparing a copolymer by using the perfluoroalkyl vinyl ether compound, and an optical plastic material comprising a copolymer prepared by the process. More specifically, the perfluoroalkyl vinyl ether has a particular molecular structure; the process is performed by copolymerizing the perfluoroalkyl vinyl ether compound with a common fluorinated olefin in the presence of a perfluorinated radical initiator; and, the optical plastic material comprises a copolymer prepared by the process and optionally a dopant.
The copolymerization of the perfluoroalkyl vinyl ether with a common fluorinated olefin can provide a copolymer having a high molecular weight. In addition, appropriate control of the composition of the monomers can provide a completely amorphous copolymer. Since the polymer prepared by the process exhibits excellent thermal properties and is substantially transparent in the UV and near IR regions, it can be usefully applied to various optical plastic materials. Furthermore, a preform for a GI type plastic optical fiber fabricated by using the copolymer and the dopant has a high T
g
, thus being stable, and a parabolic refractive index profile due to the presence of the dopant.