- AROMATIC GLYCOL ETHERS AS WRITING MONOMERS IN HOLOGRAPHIC PHOTOPOLYMER FORMULATIONS
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The invention relates to a photopolymer formulation comprising specific aromatic glycol ethers as writing monomers, matrix polymers and a photoinitiator. The invention further provides an unexposed holographic medium obtainable using an inventive photopolymer formulation, and an exposed holographic medium obtainable by exposing a hologram into an inventive unexposed holographic medium. The invention likewise provides a visual display comprising an inventive exposed holographic medium, for the use of an inventive exposed holographic medium for production of chip cards, identification documents, 3D images, product protection labels, labels, banknotes or holographic optical elements, and specific aromatic glycol ethers.
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Paragraph 0178; 0179; 0180; 0181; 0182; 0183; 0184; 0185
(2017/04/11)
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- Reactivity of some carboxylic acids in reactions with some epoxides in the presence chromium (III) ethanoate
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Reactivities have been compared of acetic, acrylic, and methacrylic acid in reactions with epichlorohydrin, phenylglycidyl ether, glycidyl acetate, and glycidyl methacrylate carried in the presence of chromium (III) ethanoate. The acid reactivities changed differently with respect to the oxirane series. The effect of solvents on the reactions of acids with epichlorohydrin has also been observed.
- Bukowska, Agnieszka,Bukowski, Wiktor
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p. 234 - 237
(2013/09/06)
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- Epoxy-acrylic macromolecular compounds on the basis of phenol and para-alkyl substituted phenol
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Some phenolic glycidyl ethers and suitable acrylic monomers on the basis of phenol and para-alkyl [-CH3, -C(CH3)3, -C9H19] substituted phenols were synthesized and characterized. The monomers were thermally polymerized in the presence of benzoyl peroxide. The polymerization reaction was studied by viscometry, as well as by curing process. The synthesized polymers degrade statistically by a radical mechanism. The apparent thermal stability is higher for para-tert-butylphenol epoxy-acrylic polymer and lower for phenol epoxy-acrylic polymer.
- Ca?caval, Constantin N.,Ro?u, Dan
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p. 731 - 737
(2007/10/03)
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- Kinetic study of addition of some carboxylic acids to 1,2-epoxy-3-phenoxypropane
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The kinetics of addition of acetic, acrylic, or methacrylic acids to l,2-epoxy-3-phenoxypropane (glycidyl phenyl ether) carried out in the presence of chromium(III) ethanoate have been studied. A kinetic model of the reaction has been proposed. The rate constants as well as the activation parameters have been evaluated. The reactivity of the acids in reactions with GPE and 1-chloro-2,3-epoxypropane (epichlorohydrin) without any solvent are compared. The compositions of reaction mixtures have been carefully determined.
- Bukowska, Agnieszka,Bukowski, Wiktor
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p. 432 - 436
(2013/09/08)
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