[C:1]1([CH:8]=[CH:7][C:5](O)=[CH:4][CH:3]=1)O.[C:9](O)(=[O:12])C=C.[C:14](O)(=O)C=C.C(O)(=O)C=C.C(C(CO)(CO)CC)O.[C:33]([O:44][CH2:45]COC(=O)C=C)(=[O:43])[C:34]1[C:35](=[CH:39][CH:40]=[CH:41][CH:42]=1)C([O-])=O>C(OC)(=O)C1C(=CC=CC=1)C(OC)=O>[CH3:45][O:44][C:33]([O:43][CH3:14])([C:34]1[CH:42]=[CH:41][CH:40]=[CH:39][CH:35]=1)[C:9]([C:1]1[CH:8]=[CH:7][CH:5]=[CH:4][CH:3]=1)=[O:12]Isotactic polymethyl methacrylate (1.0 g), syndiotactic polymethyl methacrylate (3.0 g) and hydroquinone (0.03 g) were dissolved in a mixture of dimethyl phthalate (6.81 g), trimethylolpropane triacrylate (1.59 g) and HOA-MPL 2-acryloxyethyl phthalate (14.30 g), a product from Kyoeisha Oil and Fats K.K.) and heated to 120° C. After a clear sol was obtained 2,2-dimethyloxy-2-phenyl acetophenone (0.33 g) was added to the sol. The sol thus obtained was cast onto a 50 μm-thick polyester sheet and cooled at -5° C. for one hour to give a photocurable self-retainable gelled sheet having a thickness of 5 mm.
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