Detail of "5919-74-4"

Reference

Polymer compositions for contact lenses

Polymer compositions for contact lenses. Kunzler, Jay F.; Nandu, Mahendra P. (Bausch and Lomb Incorporated, USA). PCT Int. Appl. WO 9640810 A1 19 Dec 1996, 22 pp. DESIGNATED STATES: W: AL, AM, AU, BB, BG, BR, CA, CN, CZ, EE, FI, GE, HU, IS, JP, KG, KP, KR, LK, LR, LT, LV, MD, MG, MK, MN, MX, NO, NZ, PL, RO, SG, SI, SK, TR, TT, UA, UZ, VN, AM, AZ, BY, KG, KZ, MD, RU, TJ, TM; RW: AT, BE, BF, BJ, CF, CG, CH, CI, CM, DE, DK, ES, FI, FR, GA, GB, GR, IE, IT, LU, MC, ML, MR, NE, NL, PT, SE, SN, TD, TG. (English). (World Intellectual Property Organization). CODEN: PIXXD2. CLASS: ICM: C08F220-28. ICS: G02B001-04. APPLICATION: WO 1996-US6999 16 May 1996. PRIORITY: US 1995-482063 7 Jun 1995. DOCUMENT TYPE: Patent CA Section: 63 (Pharmaceuticals) An improved hydrogel formed from hydrated polymn. products of monomer mixts. There are some commonly used reagents like 2680-03-7 in this article. contg. a major amt. of at least one hydrophilic monomer and a strengthening monomer wherein the strengthening monomer is 2-hydroxycyclohexyl methacrylate. Contact lenses made from the hydrogels are also disclosed. .

Migration phenomena in methacrylic esters and polymers derived from glycerol

Migration phenomena in methacrylic esters and polymers derived from glycerol. Garcia, Nuria; Guzman, Julio; Riande, Evaristo (Instituto de Polimeros, CSIC, Madrid 28006, Spain). Macromolecular Chemistry and Physics, 203(15), 2225-2231 (English) 2002 Wiley-VCH Verlag GmbH & Co. KGaA. CODEN: MCHPES. ISSN: 1022-1352. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Isomerization reactions were analyzed in methacrylic monomers and polymers derived from glycerol. It was obsd. that this kind of reactions takes place in similar way on both 1,3-dihydroxypropyl methacrylate and poly(1,3-dihydroxypropyl methacrylate). This polymer only could be synthesized in pure state by acid hydrolysis from precursor polymers such as poly(cis-(2-phenyl-1,3-dioxan-5-yl) methacrylate) (PCPDM) or poly(trans-(2-phenyl-1,3-dioxan-5-yl) methacrylate) (PTPDM), which were prepd. by radical polymn. of the corresponding monomers.Except for chemicals metioned above, 5919-74-4 is also used. The isomerization reactions were analyzed qual. and quant. by means of high resoln. 5919-74-4 are also occured in this study. 1H NMR spectroscopy. It was shown that, as a consequence of migration of the ester group in the methacrylic residue, the 1,3-dihydroxy units in poly(1,3GM) evolved to 2,3-dihydroxy units, giving a copolymer poly(1,3-dihydroxypropyl methacrylate-est-2,3-dihydroxypropyl methacrylate). The copolymer is very rich in the 2,3-dihydroxy units that are thermodynamically more favored by around 900 cal×mol-1 at room temp. ..