OPTICAL FIBER COATING WITH NON-RADIATION-CURABLE ACRYLIC HARD-SOFT BLOCK COPOLYMER

摘要

An optical fiber coating composition that includes an acrylic copolymer. The acrylic copolymer is a block copolymer that includes two or more acrylic blocks. The two or more acrylic blocks differ in glass transition temperature (Tg). The acrylic copolymer may include an acrylic block with a Tg above 50° C. and an acrylic block with a Tg below 0° C. Representative monomers from which the repeat units of the acrylic blocks are derived include alkyl(meth)acrylates. In one embodiment, the acrylic copolymer includes an acrylic block with repeat units derived from methylmethacrylate and an acrylic block derived from butylacrylate. The acrylic copolymer lacks urethane groups, lacks urea groups, lacks radiation-curable groups, and is otherwise unreactive with other components in the coating composition. The acrylic copolymer features high solubility in common acrylate-based radiation-curable coating compositions and can be provided at high concentrations in acrylate-based coating compositions.

主权项

1. An optical fiber coating composition comprising:
a radiation-curable component; a photoinitiator; and a non-radiation-curable acrylic copolymer, said acrylic copolymer lacking urethane groups and urea groups, said acrylic copolymer comprising a first acrylic block and a second acrylic block, said first acrylic block including repeat units derived from a first acrylic monomer, said second acrylic block including repeat units derived from a second acrylic monomer, said second acrylic monomer differing from said first acrylic monomer.