56 results about "Polytrimethylene carbonate" patented technology

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 for the popularization and the application of PPC.

A method for producing trimethylene carbonate poly(trimethylene carbonate which comprises (a) introducing liquid poly(trimethylene carbonate) and an optional catalyst into a wiped film evaporator reactor under a vacuum about 15 kPa or less, said reactor having walls heated to at least about 230° C. and an internal condenser heated to a temperature above the boiling point of trimethylene carbonate, (b) spreading the poly(trimethylene carbonate) into a thin film and allowing it to flow down the interior surface of the heated walls, (c) depolymerizing the poly(trimethylene carbonate) to form trimethylene carbonate which is driven to the internal condenser and residue poly(trimethylene carbonate) which continues down the reactor, and (d) collecting the trimethylene carbonate in a cooled distillate receiver.

The invention discloses a method for improving water resistance and flexibility of a polyvinyl alcohol film by polytrimethylene carbonate and polycaprolactone. The method includes the steps of 1), adding carboxyl-terminated polytrimethylene carbonate monododecyl ether, a solvent, a condensing agent and polyvinyl alcohol into a dry reactor and reacting to obtain a polyvinyl alcohol-polytrimethylene carbonate grafted copolymer; 2), adding the polyvinyl alcohol-polytrimethylene carbonate grafted copolymer, carboxyl-terminated polycaprolactone monododecyl ether, the solvent and the condensing agent into the dry reactor and reacting to obtain a polyvinyl alcohol-polytrimethylene carbonate-polycaprolactone double-grafted copolymer; 3) adding the polyvinyl alcohol-polytrimethylene carbonate-polycaprolactone double-grafted copolymer, the polytrimethylene carbonate monododecyl ether and the solvent into the dry reactor, and mixing to form the film so as to obtain a target object. The method for improving the water resistance and the flexibility of the polyvinyl alcohol film by the polytrimethylene carbonate and the polycaprolactone is simple in preparation process and easy to master, and the water resistance and the flexibility of the obtained modified film are improved greatly.

The invention provides a solid polymeric electrolyte and a preparation method thereof, and a lithium ion secondary battery, belonging to the technical field of lithium ion secondary batteries. The solid polymeric electrolyte comprises polytrimethylene carbonate polymerized from trimethylene carbonate, a plasticizer, a lithium salt, a bridging agent and a second initiator. The invention also relates to the preparation method for the above solid polymeric electrolyte, and the lithium ion secondary battery. Compared with the prior art, the solid polymeric electrolyte of the invention has the advantage that the solid polymeric electrolyte is applicable to preparation of the lithium ion secondary battery with high capacity and high voltage. The preparation method is simple and convenient in process, low in cost and easy for industrial production.

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 discloses a polylactic acid blending composite and a preparation method thereof. The polylactic acid blending composite is prepared by blending one or a mixture of more of polytrimethylene carbonate, polytetramethylene carbonate, polypentamethylene carbonate and polyhexamethylene carbonate with polylactic acid. The method comprises the following steps of: performing ring-opening polymerization on a cyclic carbonate monomer to obtain a polylactic acid modifying agent; and blending a polylactic acid material and the modifying agent in a required ratio to prepare composite granules or tablets, namely the polylactic acid blending composite. Membranes, fibers and injection molding products can be prepared from the modified polylactic acid blending composite by the ordinary method for processing high molecular materials.

The invention belongs to the field of biomedical materials and regenerative medicine, and particularly relates to silk fibroin/functionalized polytrimethylene carbonate hydrogel for repairing endometrium and a preparation method. The hydrogel comprises silk fibroin, functionalized polytrimethylene carbonate and living cells, wherein the mass ratio of the silk fibroin to the functionalized polytrimethylene carbonate is (5-1):1. According to the invention, the biocompatibility of the hydrogel is improved by introducing the functionalized polytrimethylene carbonate which contains a hydrophilic chain segment, does not contain any ester bond, does not generate an acidic degradation product in a degradation process and has controllable and adjustable performance; and the gelling time and the gelling mode of the silk fibroin hydrogel are regulated and controlled through the structure, composition, content and other factors of the functionalized polytrimethylene carbonate, and cells/stem cellsare loaded at the same time, so that the hydrogel has no side effect on the loaded cells and has no irritation to an implanted part, and the purpose of repairing endometrium is achieved.

The invention provides a superfine flexible fiber material and a preparation method thereof and belongs to the field of fiber materials. The superfine flexible fiber material comprises the following raw materials in parts by weight: 60-80 parts of polyphenylene sulfide slices, 100-120 parts of alpha-naphthalene chloride, 2-5 parts of pectin, 50-80 parts of deionized water, 5-8 parts of an antioxidant, 2-5 parts of a dispersing agent, 9-24 parts of polylactic acid, 3-8 parts of polytrimethylene carbonate, 3-8 parts of polydioxanone and 3-8 parts of polycaprolactone. The fiber material has highflexibility, and is difficult to age, long in service life, green and environmentally friendly. The preparation method of the superfine flexible fiber material is simple, and the prepared superfine flexible fiber material is better in property.

A biodegradable triblock copolymer comprising: an A-B-A' structure wherein the A and A'blocks each include polylactide, the B block includes from about 55 to about 100 mole percent of polytrimethylenecarbonate and 0 to about 45 mole percent polylactide, and the biodegradable triblock copolymer overall includes from about 15 to about 25 mole percent of the polytrimethylene carbonate and from about75 to about 85 mole percent of the polylactide. Also provided are compositions and implantable medical devices made therefrom.

The invention discloses a nano-silver deposited medical antibacterial polycarbonate material and a preparation method thereof. Firstly, amino groups on the surface of chitosan and bisphthalonitrile are subjected to a crosslinking reaction, an obtained amino-nitrile compound participates in an acrylonitrile polymerization reaction in the presence of an initiator, an antibacterial crosslinked polymer is obtained, antibacterial fiber is obtained through spinning and treated with hydrogen peroxide, hydroxylated antibacterial fiber is obtained, hydroxy of polytrimethylene carbonate is activated through glycol and is subjected with a condensation reaction with hydroxy on the surface of the antibacterial fiber, a silver nitrate water solution is added in the condensation reaction process, a reduction reaction is performed through polyvinylpyrrolidone, obtained nano-silver is deposited on the surface of the polymer through a condensation reaction, and the polycarbonate material is obtained.

The invention discloses low shrinkage mortar, and relates to the technical field of building materials, wherein the low shrinkage mortar contains a polytrimethylene carbonate modified kaolin and zeolite powder complex with a mass of 6.5 to 6.9% of the mass of the low shrinkage mortar. The low shrinkage mortar has lower shrinkage and higher crack resistance.

The invention relates to larotaxel which is a new-generation taxane medicine. The larotaxel is loaded in a carrier auxiliary material to form nanoscale particles which are lyophilized to form a powder injection. The carrier auxiliary material is an amphipathic segmented copolymer comprising a hydrophilic segment and a hydrophobic segment, the hydrophilic segment refers to methoxy polyethylene glycol, and the hydrophobic segment comprises polylactic acid, polycaprolactone, polyglutamic acid, polytrimethylene carbonate, polymethyl methacrylate and the like. Prepared drug loading micelles are high in drug loading capacity, encapsulation efficacy and stability, and water solubility of drugs is greatly improved; particle sizes of the prepared micelles range from 10nm to 100nm, and recognition and elimination of a reticuloendothelial system can be avoided by pegylation, in-vivo circulation is prolonged, passive targeting to tumor tissues is realized, and accordingly curative effect improvement and toxic and side effect reduction are realized.