10 results about "Biodegradable copolymers" patented technology

The invention discloses a degradable antibacterial plastic product and a preparation method thereof, and relates to the technical field of plastics. The high-strength plastic product is prepared through a double-layer plastic sintering technology. The surface layer is made of biodegradable copolymer, and the bottom layer is made of rigid modified copolymer reinforced plastic layer, so that the overall mechanical property is improved. In addition, a composite natural antibacterial agent composed of zanthoxylum oil resin and a tea leaf extract is utilized, so that the applicability of the plastic product is improved, and the mechanical property of a surface layer structure is enhanced through a cross-linked network. The composite antibacterial agent is environment-friendly, has biodegradability, can be decomposed by microorganisms after being discarded, and participates in natural carbon circulation.

The present invention relates to polydithioacetal copolymers, preferably which are degradable or biodegradable, to a method for manufacturing same by free-radical polymerization, to the uses thereof, to the use of dithiolactones as precursor comonomers in a free-radical polymerization, and to dithiolactones for the preparation of said copolymer or for the implementation of said method. More particularly, the present invention relates to a method for preparing copolymers, preferably which are degradable or biodegradable, by free-radical polymerization using in particular at least one dithiolactone monomer and at least one monomer comprising an ethylenic unsaturation.

Non-metallic and compostable twist-tie based on PLA compositions The present invention refers to a non-metallic and compostable twist-tie based on a composition comprising a poly(L-lactide) homopolymer and at least one biodegradable copolymer; and its preparation process.

This invention relates to the field of snow melting and de-icing technology, specifically to an environmentally friendly calcium-magnesium acetate composite snow melting agent and its preparation method, comprising the following raw materials: dolomite, biodegradable copolymer, nano-silica, and calcium carbonate. In this invention, the biodegradable copolymer, with its hydrophilic and hydrophobic segments in its molecular chain, can effectively regulate the crystal growth morphology and uniformly disperse within the system during the crystallization process. Subsequently, it synergistically works with nano-silica to form a composite coating network on the surface of calcium-magnesium acetate crystals, with the organic polymer as the continuous phase and nano-silica as the reinforcing phase. Simultaneously, the added calcium carbonate portion plays a role in inducing crystallization and regulating crystal morphology, while its micron-sized particles are embedded in the composite coating network as reinforcing fillers, jointly improving the physical properties of the product, including enhancing compressive strength, preventing storage agglomeration, and enabling the slow release of snow melting components, thus extending the effective action time.

Each biomimetic drug delivery particle includes a microparticle and one or more types of endogenous peptides. The microparticle is a biodegradable copolymer. The one or more types of endogenous peptides are bonded to a surface of the microparticle in an amount ranging from about 15% to about 50% coverage of the surface of the microparticle.

Disclosed herein are biodegradable copolymer compositions essentially consisting of a polyethylene terephthalate (PET) component and a polycondensation component chosen from a linear aliphatic diol or diamine with from 3 to 12 carbon atoms, a linear aliphatic dicarboxylic acid with from 7 to 10 carbon atoms, a branched aliphatic diol or diamine with from 3 to 12 carbon atoms, a branched aliphatic dicarboxylic acid with from 3 to 32 carbon atoms, an aliphatic hydroxy acid with from 2 to 5 carbon atoms, an aliphatic amino acid with from 2 to 20 carbon atoms and / or acetylated modifications thereof, wherein the molar ratio of PET to polycondensation component ranges between 1:4 to 4:1.

Method of preparation of an elastomeric thermoplastic biodegradable polymer material based on natural components (bio-based) contains the following steps: - components A and B are used, while: component A is a biodegradable polymer from renewable sources, or biodegradable copolymer from renewable sources, which is amorphous or low-crystalline, or a blend of two or more such amorphous polymers or copolymers, while the total content of the crystalline phase of component A is a maximum of 2 Wt %; and component B is a biodegradable polymer from renewable sources or biodegradable copolymer from renewable sources which is semi-crystalline, or a blend of two or more such semi-crystalline polymers or copolymers, while the total content of the crystalline phase of component B is at least 20 Wt %; - components A and B are blended together, and the blend is subsequently thoroughly homogenized; while the resulting homogenized blend shows an elastically reversible deformation of at least 80%, which is determined according to method M4 stated in the description of the invention.

A foam precursor, a foam, and methods for making the foam precursor and the foam is described. The foam precursor includes unmodified starch, polybutylene adipate-co-therephthalate (PBAT), and water. A PBAT weight percent representative of the PBAT included in the foam precursor is from 10% to 40%. A starch weight percent representative of the unmodified starch included in the foam precursor is greater than the PBAT weight percent. A water weight percent representative of the water included in the foam precursor is 20% or less. The PBAT weight percent is greater than the water weight percent. A density of the foam precursor is from 400 kg / m3 to 1500 kg / m3.

A foam precursor, a foam, and methods for making the foam precursor and the foam is described. The foam includes unmodified starch, polybutylene adipate-co-therephthalate (PBAT), and water. A PBAT weight percent representative of the PBAT included in the foam precursor is from 10% to 40%. A water weight percent representative of the water included in the foam precursor is from 1% to 14%. The PBAT weight percent is greater than the water weight percent. A density of the foam is from 10 kg / m3 to 80 kg / m3.