43 results about "Polycarbonyl" patented technology

A self-tanning aqueous gel composition containing: (a) a cosmetically acceptable support; (b) at least one monocarbonyl or polycarbonyl self-tanning agent; (c) at least one aqueous phase gelling agent comprising at least one water-soluble or water-dispersible, crosslinked or non-crosslinked polymer or copolymer; d) at least one tinting agent; and (e) optionally, at least one water-soluble or water-dispersible film-forming agent.

Fiber-containing composites are described that contain woven or non-woven fibers, and a cured binder formed from a binder composition that includes (1) a reducing sugar and (2) a crosslinking agent that includes a reaction product of a urea compound and a polycarbonyl compound. Exemplary reaction products for the crosslinking agent may include the reaction product of urea and an α,β-bicarbonyl compound or an α,γ-bicarbonyl compound. Exemplary fiber-containing composites may include fiberglass insulation.

Cosmetic compositions for artificially coloring the skin contain, formulated into a physiologically acceptable medium,a) at least dehydroascorbic acid and / or a monomeric derivative and / or isomeric form and / or polymeric derivative thereof, andb) at least one preferably monocarbonyl or polycarbonyl self-tanning agent;the dehydroascorbic acid may be formed “in situ” from ascorbic acid or a derivative thereof or a salt thereof via chemical oxidation and / or via enzymatic oxidation.

The invention discloses a method for preparing nano-silver particles coated with a novel polymer protective agent, which belongs to the technical field of printing electronic materials. The steps are: a) preparing a polymer protective agent solution with a certain temperature, concentration and pH value; b) adding the silver ammonia solution and reducing agent solution dropwise to the above polymer protective agent solution; c) stirring and monitoring in real time The pH value of the above-mentioned mixed solution is kept greater than 7 by adding a pH regulator; the nano-silver particles can be prepared through chemical reaction. Compared with the prior art, the beneficial effect of the present invention is: the acrylic resin with polycarbonyl structure is used as a protective agent prepared by nano-silver in an alkaline environment, and there is no domestic research report on this aspect; since the acrylic resin itself has outstanding Aging resistance (strong corrosion resistance to acids, weak bases, and salts) and adhesion, so that the prepared nano-silver particles can meet the requirements for adhesion and aging resistance in applications without adding other resins.

The invention discloses a carbonyl-substituted six-membered half cucurbit ring and a preparation method thereof, and is a novel organic heterocyclic compound and a synthesis method. In the synthesis method, imidazoline trione and paraformaldehyde are used as raw materials, the acidity and alkalinity thereof are adjusted in the reaction process, and the carbonyl-substituted six-membered half-cucurbit ring is obtained after the reaction for 36-48 hours. The reaction progress is controlled by adjusting the acidity and alkalinity. The advantage of this half-melon ring is that due to the inversion of the conformation, the port can be controlled, and its structure has multiple carbonyl groups, and its ring-shaped outer wall has a strong negative charge, which is used for the adsorption of metal ions, sewage treatment, etc. The application provides a theoretical basis.

The invention discloses a photocatalytic hydrogen production system containing a polycarbonyl diiron dithiolate cluster compound. The system comprises the polycarbonyl diiron dithiolate cluster compound, CdTe quantum dots, ascorbic acid and a water-containing solvent. The photocatalytic hydrogen production system is high in hydrogen production efficiency and stability and comprises cheap and readily available components, 786mu mol of hydrogen is produced when the total volume of the system is 10ml, and a hydrogen conversion number calculated based on a catalyst is 505.