Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1998-08-31
2000-08-01
Yoon, Tae
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526259, 526320, 523108, 351160R, 351160H, C08L 3904, C08F21808, C08F22606, G02C 704
Patent
active
06096846&
ABSTRACT:
An ultraviolet absorbing base material is disclosed in which a vinyl copolymerizable monomer and a benzotriazole ultraviolet absorbing monomer represented by formula (I) or (II) are copolymerized: ##STR1## wherein X represents H or a halogen, R.sub.1 is H or an alkyl group having 1 to 6 carbon atoms, R.sub.2 and R.sub.3 each represents a linear or branched C.sub.1 -C.sub.10 alkylene group and R.sub.4 represents H or CH.sub.3.
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Nakahata Yoshihiro
Oda Haruo
Sunada Tsutomu
Nidek Co. Ltd.
Yoon Tae
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