5 results about "Biodegradable copolymers" patented technology

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.

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.

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 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.