Abstract:
The present invention relates to a method for enclosing either hydrophobic or hydrophilic substances in silica-based micro- and nanocapsules via emulsion techniques. More specifically, it relates to a method for the preparation of 0.01 - 100 µm, particularly 0.01 - 10 µm, silica-based microcapsules containing up to 99 % (w/w) payload using a silica precursor polymer, polyalkoxysiloxane (PAOS), preferentially polyalkylalkoxysiloxane (R-PAOS), which acts not only as a silica source but also an emulsifier. In order to obtain mechanically stable capsules, the conversion of PAOS or R-PAOS is accompanied with the solidification of the organic phase. For the encapsulation of hydrophobic substances, oil-in-water emulsions are formed. The formation of water-in-oil-in-water double emulsions is required to encapsulate hydrophilic compounds.
Abstract:
A process for the preparation of polymer lattices comprising polymer nanoparticles by a photo-initiated heterophase polymerization includes preparing a heterophase medium comprising a dispersed phase and a continuous phase and at least one of at least one surfactant, at least one photoinitiator, and at least one polymerizable monomer. The at least one polymerizable monomer is polymerized by irradiating the heterophase medium with electromagnetic radiation so as to induce a generation of radicals. The at least one photoinitiator is selected from compounds comprising at least one phosphorous oxide group (P═O) or at least one phosphorous sulfide (P═S) group. The irradiating of the heterophase medium is effected so that a ratio of an irradiated surface of the heterophase medium to a volume of the heterophase medium is at least 200 m−1.
Abstract:
There is provided provide a photosensitive resin composition which can markedly improve transparency, heat resistance, heat discoloration resistance, solvent resistance, and patterning properties. A photosensitive resin composition comprising: a polymer (A) in which a content of a unit structure containing a boronic acid group, a unit structure containing a boronic acid ester group, or a combination of these unit structures is 20 mol% to 100 mol% of a total molar number of unit structures constituting the polymer; and a photosensitizer (B). The polymer (A) preferably has a weight average molecular weight of 1,000 to 50,000. A cured film obtained from the photosensitive resin composition. A microlens prepared from the photosensitive resin composition.
Abstract:
The invention provides a polymerization initiator for producing a conjugated diene polymer by living radical polymerization comprising a halogenocyclopentadienyl triorganophosphine η 2 -olefin ruthenium complex represented by formula (6)
wherein R 11 , R 12 , R 13 and R 14 each represent a hydrogen atom, a cyano group, a carbonyl group represented by formula (7), an amide group represented by formula (9), a nitro group, or a halogen atom, with the proviso that at least two of R 11 , R 12 , R 13 and R 14 are not a hydrogen atom; R 15 represents a chlorine atom, a bromine atom or an iodine atom; R 16 , R 17 and R 18 each represent an optionally substituted organic group having 1 to 10 carbon atoms; R 16 , R 17 and R 18 may be the same as or different from each other; and L represents an optionally substituted cyclopentadienyl ring;
wherein Y 4 represents a hydrogen atom or an optionally substituted hydrocarbon group having 1 to 10 carbon atoms;
wherein Y 6 and Y 7 each represent a hydrogen atom or an optionally substituted hydrocarbon group having 1 to 10 carbon atoms.
Abstract translation:本发明提供一种用于通过活性自由基聚合制备共轭二烯聚合物的聚合引发剂,其包含由式(6)表示的卤代环戊二烯基三有机膦-2-烯烃钌络合物,其中R 11,R 12,R 13和R 14各自表示氢原子, 氰基,由式(7)表示的羰基,式(9)表示的酰胺基,硝基或卤素原子,条件是R 11,R 12,R 13和 R 14不是氢原子; R 15表示氯原子,溴原子或碘原子; R 16,R 17和R 18各自表示可以具有取代基的碳原子数1〜10的有机基团。 R 16,R 17和R 18可以相同或不同; L表示任意取代的环戊二烯基环; 其中Y 4表示氢原子或可具有取代基的碳原子数为1〜10的烃基; 其中Y 6和Y 7各自表示氢原子或具有1〜10个碳原子的任选取代的烃基。
Abstract:
A method of producing vinyl polymer particles by suspension polymerization comprising: combining an aqueous media and a tricalcium phosphate to a reaction vessel; adding a p H stabilizing agent to the reaction vessel; adding a vinyl monomer to the reaction vessel; adding a peroxide initiator, e.g., which also generates CO 2 as a result of primary or secondary decomposition, to the reaction vessel; adding surfactant or a water soluble free radical initiator to generate surfactant in situ to the reaction vessel; maintaining the reactor contents at greater than or equal to 90°C until a density of a dispersed phase becomes substantially equal to that of a continuous phase; adding a blowing agent to the reaction vessel; raising the temperature of the reaction vessel to greater than or equal to 100°C; and collecting polymer particles having a particle size distribution.
Abstract:
An object of the present invention is to provide a cyan toner having a high coloring ability, enabling suppression of fogging, and having high transfer efficiency. The object can be attained by a toner including toner particles containing a binder resin, a compound having a polymeric portion bound to an azo skeleton, and a phthalocyanine pigment as a colorant.