33 results about "Methyl vinyl ether-maleic anhydride copolymer" patented technology

The invention relates to drugs for treating mouth mucosa diseases and the manufacture field of the drugs for treating mouth mucosa diseases, in particular to a mouth mucosa drug sustained release preparation for treating a mouth periodontal disease by doxycycline. The preparation is composed of a mouth mucosa contacted layer and a non-adhesiveness sealing layer. The mouth mucosa contacted layer comprises, by weight, 2-20 / 80-98 of antibiotic drugs and auxiliary materials. The components of the non-adhesiveness sealing layer are non-adhesiveness low water-solubility high-molecular polymers. The non-adhesiveness low water-solubility high-molecular polymers are chosen from polyvinyl alcohol. The components of mouth mucosa drug sustained release preparation comprise 2.0g of methyl vinyl ether-maleic anhydride copolymers, 2.0g of polyoxyethylene, 2.0g of carboxymethyl cellulose sodium, 12.0g of natural starch, 2.0g of menthol and 0.5g of doxycycline, and the rest is poval. The mouth mucosa drug sustained release preparation has the advantages that drug delivering is convenient, drug releasing time is long, drug releasing speed is even, targeting is strong, and adhesive force with mucosas is strong. In addition, the manufacturing method is simple in operation, low in cost, environment-friendly and suitable for industrial production.

The invention discloses a fiber shrinkage-reducing and anti-cracking agent and a preparation method thereof. The fiber shrinkage-reducing and anti-cracking agent is prepared from the following components in percentage by mass: 1 to 2.5 percent of micro-pore fibers, 0.5 to 1 percent of a shrinkage-reducing component, 30 to 45 percent of alunite powder, 20 to 30 percent of coal gangue powder and 30to 40 percent of gypsum; the shrinkage-reducing component is prepared by mixing a methyl vinyl ether-maleic anhydride copolymer and polyether glycol according to the mass ratio of 1 to (1.5 to 2.5); aplurality of micro-pores are formed in the surfaces of the micro-pore fibers, and the shrinkage-reducing component is adsorbed in the micro-pores by adopting a spraying drying method. According to the fiber shrinkage-reducing and anti-cracking agent, three types of anti-cracking materials are compounded to improve the anti-cracking capability of a concrete structure; the shrinkage-reducing component is adsorbed on the micro-pore fibers and a shrinkage-reducing effect is alleviated in a concrete hydration process; the micro-pore fibers and cement stones are more tightly combined and the earlytensile strength of concrete is increased; an expanded product is generated through the coal gangue powder, the alunite powder and the gypsum and the shrinkage of the concrete is compensated.

The invention provides rendering test paper for quick detection of cyanides, comprising a cyanide detection layer. The cyanide detection layer is composed of, by weight, 3-12 parts of sodium hydroxide, 8-15 parts of isonicotinic acid, 1-5 parts of triton X-100, 3-15 parts of barbituric acid, and 30-90 parts of methyl vinyl ether-maleic anhydride copolymer. The rendering test paper herein uses no bitter acids and other flammable explosive dangerous reagents during the detection process, the reaction time is short, the operating process is simple and fast, the detection cost is low, the detection cost for single sample detection is about 0.1 Yuan, the detection sensitivity and accuracy are high, rendered color uniformity is good, and the shelf life is long.