Premium
Properties of UV‐curable polyurethane acrylates for primary optical fiber coating
Author(s) -
Kim Han Do,
Kang Seung Gu,
Ha Chang Sik
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070460803
Subject(s) - prepolymer , polyurethane , isophorone diisocyanate , photoinitiator , materials science , acrylate , polymer chemistry , diluent , polybutadiene , coating , monomer , organic chemistry , composite material , chemistry , polymer , copolymer
Studies have been made on the effects of the chemical structure of reactive urethane acrylate prepolymers and diluents (reactive monomers) and overall composition of the prepolymer/diluent on the properties of the UV‐curable polyurethane acrylates for primary optical fiber coating. We prepared several urethane acrylate prepolymers from two different isocyanates, 4,4′‐dicyclohexylmethane diisocyanate (HMDI) or isophorone diisocyanate (IPDI), and two different polyols, polybutadiene diol (PBD) or polypropylene oxide diol (PPG), and 2‐hydroxyethyl acrylate (HEA) with dibutyl tin dilaurate as a photoinitiator. UV‐curable coating materials were formulated from the prepolymers and 2,2‐dimethyl 2‐phenyl acetophenone as a photoinitiator with one of four different diluents such as 1‐vinyl 2‐pyrrolidone (VP), lauryl methacrylate (LMA), acrylic acid 2‐ethyl hexyl ester (AEHE), and acrylic acid n ‐butyl ester (ABE). It was found that AEHE is the desirable diluent in the formulation of the primary fiber‐coating material. The desirable composition of PBD, when mixed PBD/PPG diols are used, should be about 50 wt % for optimum formulation. Most of the urethane acrylate prepolymers prepared in this study could be applied in the formulation of primary optical fiber coating and exhibited good properties of buffer functions, including low glass transition temperature, low modulus even at low temperature, say, below −40°C, high refractive index, and low viscosity. © 1992 John Wiley & Sons, Inc.