Zero-birefringence pressure-sensitive adhesives

Hiroto Ito, Satoshi Yanai, Sumihisa Oda, Akihiro Tagaya, Yasuhiro Koike

Research output: Contribution to journalArticlepeer-review


We have developed zero-birefringence pressure-sensitive adhesives (PSAs) that exhibit almost no birefringence at any orientation of polymer chains. To evaluate the birefringence of PSAs quantitatively, we report a novel birefringence-measurement method utilizing zero-zero-birefringence polymers that exhibit no birefringence at any orientation of polymer chains and in elastic deformation. By employing this method, we designed and synthesized poly(butyl acrylate/phenoxyethyl acrylate/ acrylic acid/hydroxyethyl acrylate)=80.0:20.0:1. 5:1.0 (by weight) that contains 1.8 wt% isocyanate-type crosslinker that exhibited almost zero birefringence. Furthermore, we demonstrated that after the accelerated aging test by applying heat, this zero-birefringence PSA almost completely prevented light leakage through crossed polarizers.

Original languageEnglish
Article number022142
JournalAIP Advances
Issue number2
Publication statusPublished - 2012 Jun

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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