56 results about "Polytrimethylene carbonate" patented technology

The invention discloses a bone cement filling balloon structure, which comprises a pipeline-shaped injector, and a balloon connected onto the lower end of the injector, wherein a preassembled rod extending into the balloon is arranged in an inner cavity of the injector; the balloon is made of absorbable materials, such as poly-L-lactic acid, poly-DL-lactic acid, polyglycolic acid, polycaprolactone, polyethylene glycol, poly-di-chalk alkyl ketone, polytrimethylene carbonate, and a copolymer or a polymer blend thereof; and the molecular weight of the absorbable materials is 5,000-1,000,000. The bone cement filling balloon structure disclosed by the invention has the advantages that not only is the distribution of bone cement in a vertebral body be effectively controlled to prevent the bone cement from leaking in quantity, but also the bone cement can be absorbed in the body; and the bone cement filling balloon structure is simple to operate during an operation.

The invention discloses a method for improving the water resistance and flexibility of polyvinyl alcohol film by using polytrimethylene carbonate and polylactic acid glycolic acid. The following steps are adopted: 1) adding carboxyl-terminated polytrimethylene carbonate to the reactor Ester monolauryl ether, solvent, condensing agent and polyvinyl alcohol, react to obtain polyvinyl alcohol-polytrimethylene carbonate graft copolymer; 2) add polyvinyl alcohol-polytrimethylene carbonate to the reactor Graft copolymer, carboxyl-terminated poly(lactic-co-glycolic acid monododecyl ether), solvent and condensing agent, react to obtain polyvinyl alcohol-polytrimethylene carbonate-poly(lactic-co-glycolic acid) double graft copolymer; 3) Reaction Add polyvinyl alcohol-polytrimethylene carbonate-polylactic acid glycolic acid double-graft copolymer, polytrimethylene carbonate monolauryl ether and solvent into the vessel, mix and form a film to obtain the object of the present invention. The preparation process of the invention is simple and easy to master, and the water resistance and flexibility of the obtained modified membrane are greatly improved.

The invention discloses a method for improving the flexibility of a polypeptide film by using polypropylene glycol and polytrimethylene carbonate, which adopts the following steps: 1) Synthesis of a graft copolymer of polypeptide-polypropylene glycol: adding Polypeptide homopolymer, polypropylene glycol monobutyl ether, solvent and catalyst, under an inert atmosphere, stirred and reacted at 55-57°C for 2-3 days, then obtained the target product by filtration, dialysis and drying; 2) Polypropylene glycol and polysanya Preparation of methylcarbonate-modified polypeptide film: Add polypeptide-polypropylene glycol graft copolymer, polytrimethylene carbonate and solvent into a dry reactor, stir and mix at 45-50°C for 40 minutes under an inert atmosphere ~60 minutes later, film was formed by casting method and dried to obtain the object of the present invention. The preparation process of the invention is simple and easy to master, and the flexibility of the obtained modified membrane is greatly improved.

The invention discloses a stereotactic polylactic acid (sc-PLA) / polytrimethylene carbonate (PTMC) biomass composite fiber and a preparation method thereof. The sc-PLA / PTMC biomass composite fiber is sc-PLA and PTMC Blended melt spinning, the melting peak temperature is above 200°C when measured by differential scanning calorimeter, the crystal diffraction peak 2θ=12°, 16°, 21°, 24° is measured by XRD, and the degree of crystallinity is 20~ 70%. The melting temperature, breaking strength and elongation at break of the sc-PLA / PTMC biomass composite fiber prepared by the present invention are all much higher than ordinary PLA fibers; the biomass composite fiber is drawn after being hydrolyzed in a solution of pH 5 at 130°C for 1 hour The tensile strength retention rate is 65%~96%, which is much higher than ordinary PLA fibers. The composite fiber processing method has simple process, is easy to process, has excellent product performance, and has broad application prospects.

The invention discloses a flexible biodegradable polytrimethylene carbonate composite film and a preparation method thereof. The composite film is formed by blowing a film after melting and mixing polytrimethylene carbonate, thermoplastic polyurethane elastomers, a bulking agent, antioxygen, a heat resistant stabilizing agent, a slipping agent, an antiblocking agent, a filling agent, a biodegradation accelerating agent and a light decomposition agent. In the invention, PPC and elastomers TPU are effectively compounded, thereby solving the problems of brittleness and low-temperature viscous flow of materials; the processing temperature of unsealed PPC is expanded to 170 DEG C, and the thermal degradation temperature is improved to 210 DEG C. Meanwhile, the composite film has good mechanical property and film blowing stability, can be applied to the fields of soft film materials, such as disposable shopping bags, land films, preservative films, and the like, and opens a new approach forthe popularization and the application of PPC.

The invention provides a gel coating suite capable of preventing adverse events such as wound infection, and the like after an eye surgery, comprising: a fluid component in a buffer solution which includes lysine, polylysine or polyethyleneglycol multi-branch isomer and has a pH value between 3 and 12 in a first container; and a solid component of a group formed by polytrimethylene carbonate, polylactic acid, polyethyleneglycol, polyethyleneglycol multi-branch isomer, glutin, polyurethane, gelatin, polyphosphate ester, polyglycolic acid, as well as copolymer and blend thereof in a second container. When the fluid component and the solid component are mixed, the gel is formed and directly coated to the parts for preventing the infection and the leakage after the eye surgery.

The invention belongs to the field of biomedical materials and regenerative medicine, and in particular relates to a silk fibroin / functionalized polytrimethylene carbonate hydrogel for repairing endometrium and a preparation method thereof. The hydrogel comprises silk fibroin, functionalized polytrimethylene carbonate and living cells, and the mass ratio of silk fibroin to functionalized polytrimethylene carbonate is 5-1:1. The present invention improves the biocompatibility of the hydrogel by introducing a functionalized polytrimethylene carbonate that contains a hydrophilic segment and does not contain any ester bonds, no acidic degradation products are generated during the degradation process, and its performance can be controlled and adjusted , and regulate the gelation time and gelation method of silk fibroin hydrogel through the structure, composition, content and other factors of functionalized polytrimethylene carbonate, and load cells / stem cells at the same time, without side effects on the loaded cells, And it is not irritating to the implantation site, so as to achieve the purpose of repairing the endometrium.

The invention discloses a method for improving the hydrophilicity of a polypeptide film by using polytrimethylene carbonate and polyvinylpyrrolidone. The following steps are adopted: 1) Synthesis of a graft copolymer of polytrimethylene carbonate-polytrimethylene carbonate: Add polypeptide homopolymer, polytrimethylene carbonate monododecyl ether, solvent and catalyst into the drying reactor, under inert atmosphere, stir and react at 55-58°C for 3-4 days, then filter, dialyze, Drying to obtain the target product; 2) Preparation of polytrimethylene carbonate and polyvinylpyrrolidone modified polypeptide film: add polypeptide-polytrimethylene carbonate graft copolymer, polyvinylpyrrolidone to the drying reactor and a solvent, under an inert atmosphere, stir and mix at 40-50°C for 50-70 minutes, then form a film by casting method and dry to obtain the object of the present invention. The preparation process of the invention is simple and easy to master, and the hydrophilicity of the obtained modified membrane is greatly improved.

The invention discloses an ABS material for a magnetic piece toy and a preparation method thereof. The ABS material for magnetic sheet toys includes the following components by weight: 25-40 parts of ABS resin, 3-9 parts of biodegradation agent, 4-7 parts of composite reinforcing agent, 0.5-2 parts of toughening agent, 1-2.5 parts of lubricant agent, 1-4 parts of plasticizer, 2-5 parts of silane coupling agent; biodegradation agent includes the following components: modified polytrimethylene carbonate, organic acid, polylactic acid, 0.8-1.6 parts of diatomaceous earth, Glutamic acid, biological enzyme, 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine-2-yl)-5-octoxyphenol, hydrophilic Sexual fibers. The ABS material for the magnetic sheet toy has the advantages of being biodegradable, fast in degradation speed, high in degradation rate, harmless to the environment, good in flame retardancy and capable of purifying the air.