摘要:
Described is a polymerizable composition of a photochromic amount of at least one photochromic compound, at least one material having at least one carbonate group and at least one hydroxyl group, and at least one monoisocyanate containing material having at least one unsaturated group. The polymerizable composition optionally contains copolymerizable monomers. Also described are photochromic polymerizates, e.g., photochromic optical elements such as ophthalmic lenses, prepared from the polymerizable composition of the present invention.
摘要:
Describes polymerizable organic compositions of from about 30 to 95 weight percent of a first monomer component which is an alkoxylated diol, e.g., alkoxylated bisphenol, having acrylate or methacrylate groups, i.e., dimethacrylate of bisphenol A having an average of 1 to 4 ethoxy units, and from about 5 to 70 weight percent of a second monomer component which is an alkoxylated diol, e.g., alkoxylated bisphenol, having acrylate or methacrylate groups, i.e., dimethacrylate of bisphenol A having 25 to 70 ethoxy units. Optionally there may also be present from about 0 to 65 weight percent of at least one monomer component which is selected from: (i) a monoethylenically unsaturated monomer that is polymerizable by free radical initiation; (ii) a bis�(meth)acryloyl-terminated!polyethylene glycol monomer; and (iii) a monomer having at least three terminal ethylenically-unsaturated groups. Substantially completely cured polymerizates prepared from such compositions may be used to prepare photochromic articles, e.g., lenses, by incorporating a photochromic substance, e.g., by thermal transfer, into the polymerizate.
摘要:
Described are various methods of producing non-aqueous dispersions of photosensitive polymeric microparticles, comprising: (a) preparing one or more aqueous dispersions of a polymerizable component, at least one of which contains a photosensitive material and, wherein the polymerizable components comprise at least one hydrophilic functional group and/or at least one hydrophobic functional group; (b) subjecting the dispersion of (a) to conditions sufficient to form microparticles; (c) at least partially polymerizing the polymerizable component; (d) combining the dispersion with an organic continuous phase comprising an organic solvent; (e) removing water from the dispersion such that the final water content of the non-aqueous dispersion is less than 30 percent by weight; wherein e) is performed before or after d); and (f) reacting any acid functional groups on the surface of the microparticles with a reactive material having at least one epoxy functional group, at least one thiocarbonylthio functional group, at least one alkoxyamine functional group, or at least one halide functional group.
摘要:
Describes polymerizable organic compositions of a major amount of a first monomer component which is a polyol(allyl carbonate), e.g., diethylene glycol bis(allyl carbonate), and from about 2 to 35 weight percent of a second monomer component which is an alkoxylated bisphenol (or hydrogenated bisphenol) having acrylate or methacrylate groups, e.g., dimethacrylate of bisphenol A having 25 to 35 ethoxy units. Substantially completely cured polymerizates prepared from such compositions may be used to prepare photochromic articles, e.g., lenses, by incorporating a photochromic substance, e.g., by thermal transfer, into the polymerizate.
摘要:
Described are various methods of producing non-aqueous dispersions of photosensitive polymeric microparticles, comprising: (a) preparing one or more aqueous dispersions of a polymerizable component, at least one of which contains a photosensitive material and, wherein the polymerizable components comprise at least one hydrophilic functional group and/or at least one hydrophobic functional group; (b) subjecting the dispersion of (a) to conditions sufficient to form microparticles; (c) at least partially polymerizing the polymerizable component; (d) combining the dispersion with an organic continuous phase comprising an organic solvent; (e) removing water from the dispersion such that the final water content of the non-aqueous dispersion is less than 30 percent by weight; wherein e) is performed before or after d); and (f) reacting any acid functional groups on the surface of the microparticles with a reactive material having at least one epoxy functional group, at least one thiocarbonylthio functional group, at least one alkoxyamine functional group, or at least one halide functional group.
摘要:
Described is a photochromic article that includes a substrate and at least a partial coating of an at least partially cured polymerizable composition of a photochromic amount of at least one photochromic compound, at least one material having at least one carbonate group and at least one hydroxyl group, and at least one monoisocyanate containing material having at least one unsaturated group. Also described are photochromic optical elements such as ophthalmic lenses, prepared from an optical element substrate coated with the photochromic polymerizable composition.
摘要:
Describes a polymerizable composition of (a) a first allyl functional monomer, which is selected such that a substantially completely cured polymerizate of the first allyl functional monomer has a 15 second Barcol 934 hardness of at least 40, and (b) a second allyl functional monomer selected from polyether diol bis(allyl carbonate), polylactone diol bis(allyl carbonate) and mixtures thereof. The second allyl functional monomer is present in the composition in an amount to provide a substantially completely cured polymerizate having: (i) improved organic photochromic substance incorporation relative to a substantially completely cured polymerizate of the composition free of monomer (b); and (ii) heat distortion temperature of at least 40° C.
摘要:
The invention includes a thermosetting film-forming composition comprising a polytrialkanolamine reacted with a crosslinking agent composition. The composition forms a three-dimensional crosslinked network having atrane-containing linkages.
摘要:
The invention includes a thermosetting film-forming composition comprising a polytrialkanolamine reacted with a crosslinking agent composition. The composition forms a three-dimensional crosslinked network having atrane-containing linkages.