1. National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Central 5, 1–1-1 Higashi Tsukuba 305-8565 Ibaraki Japan
2. Graduate School of Pure and Applied Sciences University of Tsukuba 1-1-1 Tennodai Tsukuba 305-8573 Ibaraki Japan
3. Polyurethane Research Laboratory Tosoh Corporation 1-8 Kasumi Yokkaichi Mie 510-8540 Japan
4. Tosoh Corporation 3-8-2 Shiba Minato-ku Tokyo 105-8623 Japan