(1) Urethane hensei Acryl Toryo ha Toryo no
jushi(resin) to naru mono de. Kore ha Urethane kei(iroiro na Uretane group ga arimasu ) no oligo-mer ya polymer no end-
groups( 2-ends, 3-ends, 4-ends) o hannou-sei
no aru acryl group o tsuketa mono de.
(2) Senjou(2-ends) nara ba
Acryl--Urethane--Uretane--Uretane--Acryl
-- ha iroiro ha chain ga kangae raremasu.
(3) Mannaka ni aru Urethane mo -- mo, acryl
mo thuujo Cl(enso) ki ha fukunde imasen ga.