287 results about "Methacrylate copolymer" patented technology

A polymer of hydrophobic monomers and hydrophilic monomers is provided. It is also provided a polymer blend that contains the polymer and another biocompatible polymer. The polymer or polymer blend and optionally a biobeneficial material and/or a bioactive agent can form a coating on an implantable device such as a drug delivery stent. The implantable device can be used for treating or preventing a disorder such as atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, patent foramen ovale, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, or combinations thereof.

Extrusion of a mix containing a pharmaceutically active agent can be achieved using a plasticising excipient in an amount sufficient to act as plasticiser and also act as lubricant, thereby avoiding the need for inclusion of a lubricant. The invention provides multiparticulates with controlled release properties, substantially free of lubricant. The present invention is preferably directed to extruded multiparticulates containing an opioid such as oxycodone, an ammonium methacrylate copolymer such as Eudragit® RSPO, a plasticising excipient such as preferably stearyl alcohol and a water permeability modifier such as preferably Eudragit® RLPO. The obtained multiparticulates show a release rate profile which is pH-independent.

Device structure 100 for iontophoresis provides electrode 101 and electrically conductive layer 102. Electrically conductive layer 102 contains active ingredient D and basic water swelling methacrylate copolymer P1 and/or acidic water swelling methacrylate copolymer P2. Electrode 101 and electrically conductive layer 102 are placed into a hollow of backing 103 and electrode terminal 104 is connected to electrode 101 through backing 103. Adhesive layer 105 is set around backing 103, and liner 106 to be removed when using the device, is placed so as to cover the hollow of backing 103.

The invention relates to a multilayer dosage form comprised of: a) a neutral core; b) an inner coating consisting of a methacrylate copolymer; c) an outer coating consisting of a copolymer of which 40 to 95% by weight is composed of radically polymerized C₁ to C₄ alkyl esters of acrylic acid or of methacrylic acid and of which 5 to 60% by weight is composed of (meth)acrylate monomers having an anionic group in the alkyl radical. The invention is characterized in that the inner coating is essentially comprised of a methacrylate copolymer, of which at least up to 90% by weight consists of (meth)acrylate monomers with neutral radicals, which, in accordance with DIN 53 787, has a minimum film formation temperature of no higher than 30° C., and which contains the pharmaceutical active substance in bound form.

A two-part high aqueous-content system for oxidative coloration of hair utilizing a developer formulation of water, a peroxide oxidizer and an anionic acrylate/beheneth-25 methacrylate copolymer. The system has efficient conditioning properties and substantially less or no dry-out problems.

The present invention discloses water suspended nano pesticide capsule preparation prepared via emulsion polymerization process. It has capsule shell of styrene, isocyanate, acrylate and methacrylate copolymer, and core comprising ididacloprid, high effect cypermethrin or diflubenzuron as effective component; contains pesticide 0.2-5 wt%, capsule shell 5-30 wt%, additive 10-35 wt% and water in proper proportion. The nano capsule is disersive spherical particle of size smaller than 100 nm. Compared with traditional pesticide preparation forms, the present invention has the features of water based solvent, nano level dispersive effective component, high stability, etc. and may be used in killing various pests of fruit tree, vegetable, flower, cotton, tobacco, etc.

The invention discloses a B1-grade flame-retardant irradiation crosslinking low-smoke halogen-free insulated cable material and a preparation method thereof. The B1-grade flame-retardant irradiation crosslinking low-smoke halogen-free insulated cable material is prepared from, by mass, 5-30% of ethylene-vinyl acetate copolymer (EVA), 1-20% of ethylene-octylene copolymer (POE), 1-20% of polyethylene (PE), 1-10% of ethylene-ethyl methacrylate copolymer (EMA), 1-5% of silane, 1-10% of a compatilizer, 40-70% of a flame retardant, 1-5% of an antioxidant, 0-5% of other auxiliaries and 10-40% of inert filler. The cable material can meet B1-grade flame-retardant requirements and has good mechanical performance and processing performance.

The present invention relates to amphoteric copolymers which comprise ethyl methacrylate, if appropriate a N-vinyllactam compound, at least one monoethylenically unsaturated carboxylic acid and at least one compound with α,β-ethylenically unsaturated double bond and at least one cationogenic and/or cationic group in copolymerized form, to cosmetic and pharmaceutical compositions which comprise such copolymers, to preparation methods, and to the use of these copolymers.

The invention discloses a high compressive polystyrene-co-octadecyl methacrylate copolymer resin microsphere which is a crosslinking copolymer prepared by taking divinylbenzene as a cross-linking agent, taking styrene as a first monomer, taking octadecyl methacrylate as a second monomer and adding a pore-foaming agent. According to the high compressive polystyrene-co-octadecyl methacrylate copolymer resin microsphere, a long-chain flexible monomer of the octadecyl methacrylate is introduced to be copolymerized with the styrene, and therefore, the compressive strength of the resin microsphere as parents of ion exchange resin or adsorbent resin is obviously improved, the strength increase efficiency reaches more than a dozen times, and the resin microsphere cannot be crushed on account of structural defects per se in the use process.

The invention relates to a dispersion suitable for use as coating agent and binder for pharmaceutical forms, having a solids content of 10-70% by weight consisting of a) from 90 to 99% by weight of a methacrylate copolymer consisting of at least 90% by weight of (meth)acrylate monomers containing neutral radicals and having a glass transition temperature Tg of from -20° C. to +20° C. as determined by the DSC method, and b) 1-10% by weight of a nonionic emulsifier having an HLB of from 15.2 to 17.3.

The invention relates to modified methacrylic resin, and discloses silicone-modified methacrylic resin as well as a preparation method and application thereof. The silicone-modified methacrylic resin is prepared from 100 parts of functional methacrylate copolymer, 20-70 parts of active MQ silicone, 100-500 parts of organic solvent, and 0.2-10 parts of catalyst in a manner of evenly mixing. The silicone-modified methacrylic resin is firstly kept still for 10-20 minutes at 70-100 DEG C, and then cured for 1-2 hours at 140-180 DEGC to obtain a heat-resistant hydrophobic coating of the silicone-modified methacrylic resin. The heat resistance of the silicone-modified methacrylic resin disclosed by the invention is obviously improved; the glass-transition temperature can be up to over 250 DEG C; the hydrophobicity and the stain resistance are obviously improved; the water contact angle of a copolymer film can be up to over 120 DEG C; the water absorption of three days is smaller than 0.1%; and the stain resistance is level zero.

The present invention discloses a method for treating or preventing a bone disorder in a mammal in need thereof comprising orally administering to said mammal a pharmaceutically effective amount of a pharmaceutical composition of at least one bisphosphonate, or a pharmaceutically acceptable salt or esters thereof, and at least one aminoalky methacrylate copolymer, according to a dosing schedule having a dosing interval selected from once-weekly dosing, twice-monthly dosing, once-monthly, once-quarterly and once-annually dosing. The present invention further discloses a method for treating or preventing a bone disorder in a mammal in need thereof comprising continuously orally administering a unit dosage per-day to said mammal in a short time for a long time therapy.

The invention provides a bath cream and a preparation method thereof. The bath cream mainly comprises the following components in weight percent: 12-20% of surface active agent, 3-7% of crylic acid (ester)/stearyl alcohol polyether-20 methacrylate copolymer, 0.5-1% of coconut oil amide DEA, 0.05-0.3% of methyl isothiazolinone, 0.3-0.5% of sodium hydroxide, 0.5-1% of dehydrated plant smashed particles and 1-1.5% of sodium chloride. The bath cream of the invention improves the utilization efficiency of plants, and plays a certain action of massage on skins by adding stable suspended dehydrated plant smashed particles, and improves the cleaning efficacy of the bath cream.

Poly methacrylate copolymers are disclosed which comprising from about 60 to about 96 weight percent of a C12-C16 alkyl methacrylate and from about 40 to about 4 weight percent of a C18-C30 alkyl methacrylate and provide excellent low temperature properties to lubricating oils.

The invention provides water moisturizing cream. The water moisturizing cream is prepared from the following components: cyclopentasiloxane, polydimethylsiloxane, cetyl PEG/PPG-10/1 polydimethylsiloxane, cyclopentasiloxane/polydimethylsiloxane cross-linked polymer, essence, glycerol, butanediol, propylene glycol, panthenol, glycine betaine, sodium chloride, crylic acid (ester)/beheneth-25 methacrylate copolymer, sodium hydroxide, sodium hyaluronate, daisy flower extract, kappaphycus alvarezii extract, chlorella/white lupine protein fermented product, glycyrrhiza glabra root extract, extract of all-grass of Bacopa monnieri ( L .) Wettst., bio-saccharide gum, phenoxyethanol/ethylhexylglycerin and deionized water. The water moisturizing cream provided by the invention is good in stability, good in closing property, and durable in moisture retention, and has soft and smooth applying feel.

The invention relates to a preparation method of an anti-coagulation hemodialysis membrane. The preparation method includes the steps of: a) adding acrylonitrile and ethyl methacrylate into a reaction kettle according to mass ratio of 0.1-5.5:1, stirring the mixture and dropwise adding a polymerization initiator to initiate free radical polymerization to obtain an acrylonitrile-ethyl methacrylate copolymer; b) blending 1-5.5% of the acrylonitrile-ethyl methacrylate copolymer, 12-18% of polysulfone, 1-12% of an additive, and 65-85% of a solvent to prepare a membrane solution, and spinning the membrane solution to manufacture hollow-fiber hemodialysis membrane; and c) dissolving an active monomer containing an alkene double bond and a hydrophilic group in deionized water, and adding a cerium ammonium nitrate grafting initiator to prepare a soaking water solution, and soaking the hollow-fiber hemodialysis membrane in the soaking water solution to initiate a grafting reaction of the active monomer on the surface of the hollow-fiber hemodialysis membrane, and cleaning the hollow-fiber hemodialysis membrane. The surface hydrophilicity of the hemodialysis membrane is significantly improved. The hemodialysis membrane has high biocompatibility and anti-coagulation performance.

The invention discloses a method for preparing an inorganic aluminosilicate polymer and organic macromolecule composite gelled material. In the method, phosphatic slag or slag capable of providing inorganic aluminosilicate components and styrene/methacrylate copolymer emulsion are utilized to produce phosphatic slag or slag inorganic aluminosilicate polyer and organic macromolecule composite gelled material under the action of sodium silicate excitants; wherein the amount of the styrene/methacrylate copolymer emulsion is 5-25 percent of the weight of the phosphatic slag or slag, and the amount of the alkali excitant sodium silicate is 13 percent of the weight of the phosphatic slag or slag; and the flexural strength of the inorganic aluminosilicate polymer and organic macromolecule composite is superior to the inorganic aluminosilicate polymer in 28-day age, and the 28-day maximum flexural strength is 2.08 times of that of the inorganic aluminosilicate polymer. The preparation process has no discharge of waste water, waste gas and waste slag, does not need heating, is green, environment-friendly and energy-saving, reduces the consumption, and is one effective approach for large-scale resource utilization of industrial solid wastes.

The invention relates to the technical field of cosmetics and particularly relates to a film-forming oil-control composition and a cosmetic. The film-forming oil-control composition disclosed by the invention is prepared from the following ingredients: trimethylsiloxysilicate, hydroxyapatite and an acrylic(acrylate)/polytrimethylsiloxane methacrylate copolymer. High-polymer film formers, i.e., the trimethylsiloxysilicate and the acrylic(acrylate)/polytrimethylsiloxane methacrylate copolymer and special oil taking powder, i.e., the hydroxyapatite are compounded and have a synergistic effect, the anti-sweat friction-resistant effect of a base makeup can be effectively improved, skin can be kept dry and clear through continuously absorbing excessive sebum, the problem of makeup dissolving caused by sebum secretion is solved, and a base makeup choice with excellent makeup holding performance is provided for customers.