11 results about "Polylactic acid polymer" patented technology

An article is described comprising a first film layer comprising polylactic acid polymer (semicrystalline polylactic acid polymer; amorphous polylactic acid polymer; or a mixture thereof); a second (e.g. polyvinyl acetate) polymer having a Tg of at least 25° C.; plasticizer. In some embodiment, the film layer further comprises inorganic pigment and / or hydrolysis stabilizer. In other embodiments, the film has a net melting endotherm, ΔHnm1, of less than 10 J / g. Also described are methods of making a graphic film.

The invention relates to the technical field of pharmaceutical preparations, and particularly discloses rasagiline pamoate long-acting sustained-release microspheres and a preparation method thereof, the long-acting sustained-release microspheres comprise rasagiline pamoate and a polylactic acid polymer, and the long-acting sustained-release microspheres have a good sustained-release effect. The preparation method comprises the following steps: firstly, preparing rasagiline into pamoate so as to reduce the solubility of rasagiline; in the preparation process of the long-acting sustained-release microspheres, the drug release rate is regulated and controlled by adjusting the proportion of the low-molecular-weight polylactic acid, the sudden drug release phenomenon is reduced by reducing the curing temperature, and the preparation process is suitable for industrial large-scale production. The finally obtained long-acting sustained-release microsphere composition can be used for preparing a medicine for treating Parkinson's disease.

The invention relates to a process for producing a lactic acid-based polymer, which process comprises copolymerizing lactide with a cyclic dimer of another alpha-hydroxy acid as a copolymerized monomer of opposite alpha-carbon chirality.

Degradable extruded nettings are provided. Degradable extruded nettings may include a plurality of interconnected strands, at least some of the strands being made from a polymeric blend, the polymeric blend including a polylactic acid polymer composition, polybutylene succinate, and a degradation additive, the degradation additive including a degrader in a carrier resin are provided. Grass sod and methods for preparing grass sod using such degradable extruded nettings are also provided.

A process for the production of a nonwoven fabric. In particular, it relates to the production of a nonwoven fabric having desirable tactile and haptic as well as mechanical properties, as well as to the nonwoven fabric itself. The process requires the selection of specific polylactic acid polymers and corresponding process conditions.

The invention discloses a multi-arm polymer coupled prodrug, a nano-micelle thereof, a preparation method and application, a hydrophobic drug is structurally modified by multi-arm polylactic acid to construct a prodrug, and a multi-arm polylactic acid prodrug is prepared. Specifically, the multi-arm polylactic acid is prepared by taking small molecules with different hydroxyl numbers as initiators and carrying out ring-opening polymerization reaction on the initiators and lactide; the multi-arm type polymer coupling prodrug is formed by performing carboxyl modification on multi-arm type polylactic acid through succinic anhydride and then performing esterification reaction on the multi-arm type polylactic acid and hydroxyl of a hydrophobic drug. Compared with a traditional single-arm polylactic acid polymer prodrug, the multi-arm polylactic acid prodrug has the unique space structure advantage, the encapsulation efficiency, the drug loading capacity and the stability of polymer nano-micelles are remarkably improved, and the multi-arm polylactic acid prodrug has the advantages of high permeability and the retention effect and high bioavailability. The enrichment of the polymer nano-micelle at a tumor part is effectively improved; and the systematic toxic and side effects of the polymer nano-micelle are reduced.

An article is described comprising a first film layer comprising polylactic acid polymer (semicrystalline polylactic acid polymer; amorphous polylactic acid polymer; or a mixture thereof); a second (e.g. polyvinyl acetate) polymer having a Tg of at least 25° C.; plasticizer. In some embodiment, the film layer further comprises inorganic pigment and / or hydrolysis stabilizer. In other embodiments, the film has a net melting endotherm, ΔHnm1, of less than 10 J / g. Also described are methods of making a graphic film.

The present disclosure relates to a method of preparing a polylactic acid polymer, and more particularly, to a method of preparing a polylactic acid polymer having a desired high molecular weight by using a specific catalyst in a lactide ring-opening polymerization reaction.

The invention relates to the field of high polymer materials, and discloses a lactic acid polymer three-dimensional fiber membrane as well as a preparation method and application thereof. The fiber membrane has a diffraction peak when 2theta is equal to 11-13 degrees through XRD (X-Ray Diffraction) measurement, the half-peak width of the diffraction peak is 0.5-1.5 degrees, and the diffraction peak belongs to a stereocomplex crystal (110) SC. The three-dimensional fiber membrane has a three-dimensional composite structure and can regulate and control molecular chain conformation, so that the lactic acid copolymer three-dimensional composite fiber membrane has excellent biodegradability and also has excellent piezoelectric property and mechanical property.

Provided is a nonwoven fabric including fibers formed from a resin composition containing: a polyester resin (A); and a polylactic acid polymer (B). The polyester resin (A) includes: a unit derived from a polyhydric alcohol (a1); and a unit derived from a polyvalent carboxylic acid (a2). The polyhydric alcohol (a1) includes a C4 or higher aliphatic diol (a1-1) having an alkyl group as a branched chain.

The application discloses a polylactic acid-gallium-indium alloy adhesive material based on electrostatic spinning and a preparation and application thereof, relates to the technical field of flexible electronic materials, and the polylactic acid-gallium-indium alloy adhesive material is mainly obtained through electrostatic spinning and surface post-processing technology from a gallium-indium alloy suspension and a polylactic acid polymer solution, the surface post-processing technology comprises one-side soaking in a tannic acid aqueous solution and an iron ion-polydopamine solution and the other-side soaking in a polypyrrole solution, and the prepared polylactic acid-gallium-indium alloy adhesive material has the characteristics of good adhesion, strong light-heat conversion capacity and excellent electric conductivity, can be widely applied to self-adhesive strain sensors as flexible electronic materials, and realizes real-time and accurate monitoring of health conditions of different parts of a body.