43 results about "Mass composition" patented technology

The invention relates to a levetiracetam slow release pellet capsule preparation and a preparation method thereof. The levetiracetam slow release pellet capsule preparation comprises the following components in percentage by mass: 50-70 percent of levetiracetam, 15-30 percent of blank pellet, 5-10 percent of hydroxypropylmethyl cellulose or polyvidone, 7-15 percent of ethylcellulose or acrylic resin, 1-8 percent of talc powder and 0.5-2 percent of cataloid. The preparation method comprises the following steps: coating levetiracetam fine powder on the blank pellet by a binding agent to be madeinto a medicine-contained pellet; coating an isolating layer on the medicine-contained pellet; coating a slow release coating film on the medicine-contained pellet coated with the isolating layer to prepare a slow release pellet; and mixing the slow release pellet, the talc powder and the cataloid and filling the mixture into a capsule. The levetiracetam is made into the slow release capsule preparation by a pellet and slow release technology, and the slow release preparation can stabilize blood medicine concentration, reduce the generating frequency and degree of the side effect and fundamentally solve the problems of great influence on a tablet by gastric pyloric sphincter and big differences of gastric emptying individuals.

The invention discloses a microwave dielectric resonator, comprising a cavity and a dielectric resonator, the dielectric resonator is a cylinder with a through hole; the dielectric resonator is composed of the following components in mass percentage: calcium carbonate, Aluminum oxide, neodymium oxide, titanium dioxide; one end of the dielectric resonator is coated with a silver layer, and the other end of the dielectric resonator is welded in the cavity; the cavity is composed of the following components in mass percentage: alumina 95~ 96%, calcium carbonate 2~3%, lanthanum oxide 0.8~1.5%, samarium oxide 0.2~0.5%; the relative dielectric constant of the cavity is 9.5; the surface roughness of the inner wall of the cavity is about 0.8; the cavity The internal wall is covered with a metal layer through sputtering or electroless plating. The microwave dielectric resonator of the invention has a high Q value, and the tuning range can reach 7%-10% at a specified frequency. The general tuning range of the TE mode resonator is 3%-4%.

The invention relates to a cationic polyurethane and modified silicone oil composite nano aqueous dispersion and a preparation method and an application thereof. The dispersion particles of the dispersion are compounded with cationic polyurethane and modified silicone oil, the diameters of the dispersion particles are less than 100nm. The mass composition of the modified silicone oil in the dispersion particles is 10 to 50 percent. High molecular weight polyether glycol and cationic diol chain extender react with isophorone diisocyanate(IPDI) to form ionic polyurethane after end capping and neutralization. The ionic polyurethane and the modified silicone oil are compounded and added with water to conduct self-emulsification at the room temperature to form the polyurethane and modified silicone oil composite nano aqueous dispersion. The nano aqueous dispersion can be used as a multifunction finishing material cotton cloth and can effectively improve the crease resistant, draping property and strength conservation rate and improve the hand feeling of fabrics and hydrophilcity and hydrophobicity of the surfaces of the fabrics.

Provided is a corrosion inhibitor that, when used on a connection section of a covered electrical cable with a terminal, said covered electrical cable having a covering material that includes a plasticizer, maintains anticorrosive performance even if exposed to high temperatures. Also provided is a covered electrical cable with a terminal, the anticorrosive property of said covered electrical cable having been improved using said corrosion inhibitor. A corrosion inhibitor including a base oil (A) that has a viscosity of 30 mPa.s or greater at 100 DEG C, and a metal adsorption component (B) that includes a phosphorus compound, wherein the mass composition ratio of (A) to (B) is within the range of (A):(B)=50:50 to 98:2. A covered electrical cable 1 with a terminal, wherein a film 7 comprising the corrosion inhibitor of the present invention covers a part 6 where a terminal metal fitting 5 and an electrical cable conductor 3 are electrically connected.

The invention discloses a sulfur-free and pearlite-free firecracker reagent and a preparation method thereof. The reagent comprises the following mass components: 35-65 percent of A component and 35-65 percent of B component, wherein the A component comprises the mass compositions: a mixture formed by 20-50 percent of potassium perchlorate, 0-30 percent of potassium nitrate and 30-50 percent of barium nitrate and a complexing agent occupying 1-5 percent of the mixture, and the B component comprises the mass compositions: 50-80 percent of aluminum powder, 10-25 percent of charcoal powder and 10-25 percent of organic foaming powder. The burning rate of a firecracker prepared from the reagent is more than 98 percent, the sound level value is no less than 100dB and is no more than 140dB, the time the gas product pressure rises from 0.69MPa to 2.07MPa is 1.74ms, a pH value of the pyrotechnic composition is 5-9, the moisture is no more than 1.5 percent, the hygroscopicity is no more than 2.0 percent, the thermal stability is 75 DEG C plus / minus 2 DEG C, the firecracker has no decomposition phenomenon under the condition of 48h, the friction sensitivity is no more than 40 percent, and the impact sensitivity of the pyrotechnic composition is no more than 0 percent. The key is that the reagent reduces the environmental pollution without harm to human bodies and has great application prospect.