10 results about "Urea Peroxide" patented technology

The invention discloses a copper-titanium etching solution, and relates to the technical field of microelectronic device manufacturing, and the copper-titanium etching solution comprises the following components by mass: 4.5-8.5% of ammonium persulfate; 1.5%-3.5% of urea peroxide; 1.0% to 2.0% of 1-hydroxybenzotriazole-5-carboxylic acid; 0.3% to 0.9% of 2-mercapto benzimidazole; 0.5% to 1.5% of sulfobutyl ether-beta-cyclodextrin; 0.8%-2.2% of L-aspartic acid-N, N-diacetic acid; 0.1% to 0.7% of iso-tridecanol polyoxyethylene ether; 0.05%-0.15% of ceric ammonium nitrate; 0.02% to 0.08% of sodium polyacrylate; and the balance of deionized water. According to the method, the matching problem of the etching rate is solved, the stability is improved, and substrate corrosion is avoided.

The invention provides a UV-moisture dual-curing silicone adhesive as well as a preparation method and application thereof, and belongs to the technical field of sealants. The UV-moisture dual-curing silicone adhesive is prepared from the following components in parts by weight: 50 to 100 parts of vinyl alkoxy terminated polysiloxane, 10 to 50 parts of alkoxy terminated mercaptopropyl modified polysiloxane, 5 to 10 parts of white carbon black, 2 to 6 parts of a cross-linking agent, 1 to 4 parts of a silane coupling agent, 1 to 5 parts of a photoinitiator, 1 to 4 parts of a photosensitizer, 5 to 14 parts of a photoacid generator and 1 to 5 parts of urea peroxide. The silicone adhesive has excellent storage stability and deep curing speed.

The present application provides a kind of urea peroxide tooth whitening gel and its preparation method, comprising: sodium fluoride solution is mixed with gum arabic solution uniformly, under the condition of stirring and heating, gelatin solution is added, and microsphere suspension is obtained;Pentanedial is added to the microsphere suspension and stirred, and intermediate microspheres are obtained;The intermediate microspheres are added to sodium alginate solution, the suspension is dropped into calcium chloride solution for gelation, and the composite microspheres are taken out and soaked in chitosan solution for oscillation, to obtain double-layer sustained-release microspheres;Carbomer is dispersed in deionized water, and after standing and swelling, a dispersion is obtained, glycerol, xylitol, double-layer sustained-release microspheres, urea peroxide and stabilizer are added to the dispersion, and after mixing uniformly, triethanolamine is added, to obtain urea peroxide tooth whitening gel.The gel product obtained by the present application has the advantages of efficient whitening, long-term anticaries, low irritation and high stability, etc., effectively solving the problems of easy decomposition and easy sensitivity of active ingredients in traditional products.

The invention discloses a stable slow-release urea peroxide tooth whitening agent composition and a preparation method thereof. The composition comprises whitening glue and a catalyst, the whitening glue is prepared from urea peroxide micro powder, a thickening agent, essence and propylene glycol; the catalyst comprises inorganic salt, a thickening agent, a basic catalyst, essence and water. According to the anhydrous whitening gel, propylene glycol is used as a matrix carrier, and a catalyst is aqueous gel; when in use, the two components are mixed according to a ratio of 4: 1, the mixed product is slowly dissolved by water in oral saliva, the active ingredient of urea peroxide is continuously released, and the whitening effect of the product is remarkably improved.

The invention relates to the technical field of molecular biological experiments, in particular to a nucleic acid scavenger which comprises a solution A and a solution B. The solution A is an active oxygen source component in the nucleic acid scavenger, the main component of the solution A is urea peroxide (0.25%-3%), and the solution A can generate excessive oxygen free radicals and effectively destroy DNA single-chain and double-chain structures. The liquid B is a synergistic and auxiliary component in the nucleic acid scavenger, the main component is horse radish peroxidase (0.1%-1%), urea peroxide can be promoted to quickly release high-activity oxygen free radicals, and the purpose of scavenging nucleic acid molecules is achieved. According to the method, nucleic acid pollution including genome DNA and nucleic acid amplification product pollution in the laboratory can be effectively eliminated, chemical pollution to the environment cannot be caused, the method has the advantages of being non-toxic, harmless and easy and convenient to operate, and a safer and more effective anti-pollution scheme is provided for the molecular biology laboratory.

The application discloses a stable slow-release urea peroxide tooth whitening agent composition and a preparation method thereof. The composition comprises a whitening glue and a catalyst. The whitening glue comprises urea peroxide micro powder, a thickening agent, essence and propylene glycol. The catalyst comprises an inorganic salt, a thickening agent, an alkaline catalyst, essence and water. In the application, the anhydrous whitening glue component takes propylene glycol as a matrix carrier, and the catalyst is an aqueous gel. When used, the two are mixed at a ratio of 4:1. The mixed product is slowly dissolved by saliva moisture, continuously releases urea peroxide active ingredients, and significantly improves the whitening effect of the product.

A composition for the oxidative brightening of keratin fibers, present as an anhydrous multi-component kit, which is designed to produce a ready-to-use mixture by adding water or an aqueous carrier liquid, characterized in that the composition comprises at least: a) a first component containing solid, anhydrous urea peroxide (carbamide peroxide) as an oxidizing agent, and b) a second component containing at least one organic silicon compound from the group of silanols, silanetriols or silanetriol copolymers.

The invention relates to a tooth bleaching agent which is prepared from the following components in percentage by weight: 5%-15% of urea peroxide, 2%-8% of a stable synergist, 1%-5% of a desensitization soothing agent, 3%-10% of a humectant, 0.5%-3% of a thickening agent, 0.1%-0.5% of a preservative, 0.05%-0.2% of essence and a certain amount of deionized water. The invention also relates to a preparation method of the tooth bleaching agent. The tooth bleaching agent disclosed by the invention has the following beneficial effects that the tooth bleaching agent is good in stability, and bleaching components can be prevented from being decomposed in a storage process; the bleaching efficiency is high, and the color of teeth can be rapidly brightened; meanwhile, the irritation is extremely low, tooth sensitivity can be relieved, gingival irritation can be relieved, the use safety and comfort are improved, and the toothpaste is suitable for industrial production and long-term use; according to the technical scheme, the preparation method is simple and easy to implement, mild in process condition and suitable for industrial production.

The invention provides a urea peroxide tooth whitening gel and a preparation method thereof, and the preparation method comprises the following steps: uniformly mixing a sodium fluoride solution with an Arabic gum solution, and adding a gelatin solution under stirring and heating conditions to obtain a microsphere suspension; adding glutaraldehyde into the microsphere suspension, mixing and stirring to obtain intermediate microspheres; adding the intermediate microspheres into a sodium alginate solution, dropwise adding the suspension into a calcium chloride solution for gelation, taking out the composite microspheres, soaking the composite microspheres into a chitosan solution, and oscillating to obtain double-layer sustained-release microspheres; carbomer is dispersed in deionized water, after standing and swelling, dispersion liquid is obtained, glycerin, xylitol, the double-layer sustained-release microspheres, urea peroxide and a stabilizer are added into the dispersion liquid, triethanolamine is added after uniform mixing, and the urea peroxide tooth whitening gel is obtained. The obtained gel product has the advantages of efficient whitening, long-term caries prevention, low irritation, high stability and the like, and the problems that active ingredients of a traditional product are easy to decompose, sensitivity is easy to cause and the like are effectively solved.

This invention provides an acidic chemical mechanical polishing slurry for gallium arsenide substrates and its application, belonging to the field of chemical mechanical polishing technology. The polishing slurry comprises, by weight percentage, 0.5–5 wt% modified cerium oxide abrasive, 0.1–3 wt% peracetic acid, 0.05–2 wt% urea peroxide, and the balance deionized water, with a pH value of 3.0–5.0; wherein the modified cerium oxide abrasive is nano-cerium oxide particles with surface-grafted organic acid functional groups, with an average particle size of 20–80 nm. The acidic chemical mechanical polishing slurry for fine polishing of gallium arsenide substrates provided by this invention, by employing a dual oxidant system composed of peracetic acid and urea peroxide, combined with modified cerium oxide abrasive with surface-grafted organic acid functional groups, balances surface reaction stability, abrasive dispersibility, and low-load mechanical removal requirements under acidic conditions, thereby helping to reduce surface scratches, particle residue, and subsurface damage depth, and improving the surface integrity of gallium arsenide substrates after fine polishing.