4results about How to "Inhibit devitrification" patented technology

The invention discloses a low-dielectric low-loss high-strength borosilicate glass ceramic composite material and a preparation method thereof, and belongs to the technical field of borosilicate glass ceramic composites.The low-dielectric low-loss high-strength borosilicate glass ceramic composite material is prepared from, by weight, 70% of low-alkali borosilicate glass ceramics with the low borosilicate ratio, 29% of Al2O3 and 1% of Bi2O3. The preparation method comprises the following steps: preparing low-alkali borosilicate glass ceramics with a high borosilicate ratio, melting the low-alkali borosilicate glass ceramics with the high borosilicate ratio and amorphous SiO2 at a set temperature to obtain the required low-alkali borosilicate glass ceramics with the low borosilicate ratio, and finally mixing and ball-milling the crushed and ground low-alkali borosilicate glass ceramics with Al2O3 and Bi2O3 to obtain the low-alkali borosilicate glass ceramics with the low borosilicate ratio. And finally, the borosilicate glass ceramic composite material is sintered at the temperature of 880-900 DEG C. The borosilicate microcrystalline glass ceramic composite material is low in dielectric, low in loss and high in strength.

The application belongs to the technical field of pharmaceutical preparations, and particularly relates to a mononitrate isosorbide oral dissolving film and a preparation method thereof. The mononitrate isosorbide oral dissolving film preparation is composed of a drug-containing layer and isolation layers which are compounded on the upper and lower surfaces of the drug-containing layer. The drug-containing layer comprises the following raw materials in percentage by mass: cyclodextrin-encapsulated mononitrate isosorbide 10-60%, film-forming material 20-80%, plasticizer 0-20% and auxiliary material 0-10%. The isolation layer comprises the following raw materials in percentage by mass: film-forming material 70-100%, plasticizer 0-30% and auxiliary material 0-10%. The mononitrate isosorbide oral dissolving film prepared by the application has the advantages of smooth appearance, good taste, uniform drug content, rapid dissolution under the action of saliva after entering the mouth, and further release and absorption, which greatly improves the drug administration compliance and solves the problem of surface crystallization of mononitrate isosorbide after long-term storage.

The present application relates to the technical field of pharmaceutical preparation, and discloses a tulobuterol transdermal patch and a preparation method thereof.The tulobuterol transdermal patch comprises a backing layer, a paste layer and an anti-sticking layer, the paste layer comprises tulobuterol, pressure-sensitive adhesive and a penetration enhancer, the pressure-sensitive adhesive is a copolymer of 2-ethylhexyl acrylate, butyl acrylate, tertiary octyl acrylamide and methyl methacrylate, and the penetration enhancer contains propylene glycol and ethyl oleate.The present application adopts a new pressure-sensitive adhesive matrix, solves the problem that tulobuterol is easy to crystallize out in the patch, and enhances the transdermal effect of tulobuterol by using a penetration enhancer.The present application also discloses a preparation method of the tulobuterol transdermal patch, and the preparation process is improved, so that the loss of tulobuterol in the preparation process is reduced, the quality of the medicine is improved, and the cost is reduced.

The application belongs to the technical field of alkali-free glass fiber, and particularly relates to a modified low-boron and low-fluorine alkali-free glass fiber composition and a preparation method thereof. The modified low-boron and low-fluorine alkali-free glass fiber composition comprises the following components: SiO2, Al2O3, B2O3, CaO, MgO, Fe2O3, TiO2, F2, R2O, X2O3, Li2O and ZnO, wherein R2O is a mixture of K2O and Na2O, and X2O3 is a mixture of La2O3 and Y2O3. The application provides the modified low-boron and low-fluorine alkali-free glass fiber composition and the preparation method thereof. Through the introduction of rare earth elements and the synergistic effect of Li2O and B2O3 components, the problems of high viscosity, high crystallization risk and narrow temperature window of the existing low-boron and low-fluorine glass fiber are effectively solved while the content of boron and fluorine is greatly reduced, and the elastic modulus, breaking strength and water resistance of the glass fiber are significantly improved.