- HIGH REFRACTIVE INDEX MONOMERS, COMPOSITIONS AND USES THEREOF
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The invention relates to novel sulfur-containing (meth)acrylic monomers and compositions thereof characterized by a high refractive index, for optical and industrial applications. The invention also relates to a method for preparing high refractive index polymeric materials and more specifically to a method for formation of ultraviolet cast optical lenses and compositions thereof comprising the sulfur-containing (meth)acrylic monomers.
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Page/Page column 44
(2008/12/08)
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- Tandem type polymerization. Synthesis and characterization of ordered poly(amide-thioether) from 2,6-dichlorophenyl methacrylate, 4,4′-thiobis(benznenethiol), and 4,4′-oxydianiline
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Ordered poly(amide-thioether) (17) was prepared by tandem type polymerization of 2,4-dichlorophenyl acrylate (11), 4,4′-thiobis(benznenthiol) (12), and 4,4′-oxydianiline (16). The polymerization was carried out by mixing all monomers in the presence of catalytic amounts of triethylamine (TEA) and 1-hydroxybenzotriazole (HOBt) in 1-methyl-2-pyrrolidinone (NMP) at 20 °C for 2 h and then 80 °C for 2 days, yielding polymer 17 with a number-average molecular weight (Mn) of 25 000. Authentic ordered poly(amide-thioether) (18) was prepared to verify the structure of polymer 17. The microstructure of polymers obtained was investigated by 1H and 13C NMR spectroscopy, and it has been found the polymer obtained has the expected ordered structure. Furthermore, model reactions were studied in detail to demonstrate the feasibility of ordered polymer formation.
- Tsuchiya, Kousuke,Shibasaki, Yuji,Ueda, Mitsuru
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p. 1815 - 1818
(2007/10/03)
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- Method of manufacturing a (meth)acryloylthio compound
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The invention relates to a method of producing (meth)acryloylthio esters of general formula I STR1 where R represents hydrogen or methyl, and R1 represents a phenyl group, a substituted phenyl group, a C1-24 alkyl group, a substitute
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