347 results about "Polybutylene" patented technology

A biodegradable polymer composite, a method of making the same and use for same are provided. The biodegradable polymer composite has about 30 to 99.5% by weight of a polymer selected from a group consisting of polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), polyhydroxyalkanoates (PHA), and polycaprolactone (PCL) grafted with a compatibilizer selected from a group consisting of maleic anhydride, glycidyl methacrylate, pyromellitic anhydride, acrylic acid, polyacrylic acid, methylene diphenyl diisocyanate, poly(glycidyl methacrylate, copolymer(s) of glycidyl methacrylate; and about 0.5 to 50 % by weight a nano-filler or a micro-filler. The biodegradable polymer composite does not contain polylactic acid. Surfaces of the nano-filler or the micro-filler may be modified using a grafting agent so that the biodegradable polymer composite has enhanced mechanical properties, increased heat resistance, compostablity and / or improved processability. The biodegradable polymer composite may be used to make flexible articles, such as a freezer wrap and a farming sheet.

The present application relates to the technical field of bio-based polymer material, and more particularly to a full bio-based PBAT-PLA copolymer, a preparation method and an application thereof, which is prepared by melt mixing bio-based polybutylene adipate terephthalate, bio-based polylactic acid and bio-based multi-epoxy chain extender through a twin-screw extruder, so that the tensile strength of the full bio-based PBAT-PLA copolymer is 31.5-44.3 MPa, and the elongation at break is 85-498%. The bio-based multi-epoxy chain extender prepared by specific selection can simultaneously improve the tensile strength and elongation at break of the full bio-based PBAT-PLA copolymer, and solve the technical problems of poor compatibility of traditional bio-based polylactic acid and non-bio-based polybutylene adipate terephthalate, and the technical problem that the addition of existing chain extenders cannot simultaneously improve the tensile strength and elongation at break of the copolymer.

The invention relates to a thermoplastic composition comprising A) polybutylene adipate terephthalate (PBAT), B) CaCO3 powder, C) one or more citric acid triesters, and optionally D) optional auxiliary components, wherein the components A) to D) add up to 100 weight-%. The invention further relates to article comprising such compositions, a stone paper comprising a sheet structure consisting of the thermoplastic composition, and a method for the manufacture of such stone paper.

The invention discloses a degradable express bag material and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a degradable express bag material. The composite material is prepared from the following raw materials in parts by weight: 40 to 50 parts of poly (butylene adipate-co-terephthalate), 20 to 30 parts of polycaprolactone, 5 to 8 parts of modified bamboo fiber, 2 to 4 parts of modified nano montmorillonite, 3 to 6 parts of tributyl citrate, 0.1 to 0.3 part of antioxidant 1076, 1 to 2 parts of iron dithiocarbamate master batch, 2 to 3 parts of maleic anhydride grafted poly (butylene adipate-co-terephthalate) and 0.3 to 0.6 part of zinc stearate. 0.1 to 0.3 part of baicalein; and 1 to 3 parts of chitosan-sorbitol composite coating liquid. According to the degradable express bag material, poly (butylene adipate-co-terephthalate) and polycaprolactone are used as main degradable raw materials, modified bamboo fibers and modified nano-montmorillonite are matched to enhance the mechanical property, an antioxidant 1076, baicalein and the like are added to guarantee the stability and functionality, temperature is accurately controlled in the preparation process, multi-step modification is adopted for optimizing component combination, and the degradable express bag material is prepared. The performance is improved through the composite coating, degradability is achieved, and good usability is achieved.

The present disclosure relates to a biodegradable multilayer film comprising stacked on each other in the following order: a) a first outer layer comprising a first polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof; b) a core layer comprising a blend of thermoplastic starch (TPS) and polybutylene adipate terephthalate (PBAT); c) a second outer layer comprising a second polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof. The present disclosure also relates to a disposable bag, a bioreactor and a container suitable for mixing, packaging, storing or transporting biopharmaceutical substances, wherein the disposable bag, bioreactor and container comprise the biodegradable multilayer film.

The invention relates to the technical field of anti-yellowing, in particular to anti-yellowing lining cloth with a hot melt coating and a preparation method of the anti-yellowing lining cloth. Composite carbon dots, an anti-yellowing agent and a composite chitosan solution are adopted to prepare finishing liquid for finishing the lining cloth; the preparation method comprises the following steps: selecting furfural and urea as a carbon source and a nitrogen source, performing one-step hydrothermal synthesis to obtain a nitrogen-doped furfural-based carbon dot, and grafting an amino-terminated polyimidazolium salt antibacterial compound to obtain a composite carbon dot; wherein the amino-terminated polyimidazolium salt antibacterial compound is an amino-terminated halogen-free polyimidazolium salt antibacterial compound which is prepared by taking ethylenediamine, butyric acid, glyoxal and formaldehyde as raw materials based on amine-aldehyde polycondensation and has good biocompatibility; the preparation method comprises the following steps: by taking polybutylene adipate, toluene diisocynate and isophorone diisocyanate as main monomers, polypropylene oxide triol as a crosslinking monomer, 2, 2-dimethylolpropionic acid and 4, 4 '-diaminodiphenyl disulfide as chain extenders and composite carbon dots as an end-capping reagent, adding water and emulsifying to obtain the waterborne polyurethane hot melt adhesive.

The invention discloses a silane-crosslinked low-smoke halogen-free flame-retardant oil-resistant polyolefin cable material and a preparation method thereof. The method comprises the following steps: preparing a bio-based polyesteramide toughening phase which is pre-polymerized by castor oil-based polyamide and poly (butylene adipate-co-terephthalate) and is terminated by itaconic anhydride; the preparation method comprises the following steps: self-assembling phytic acid and melamine to wrap ammonium polyphosphate, so as to prepare supramolecular flame-retardant gel powder; the method comprises the following steps: grafting aramid pulp fibers by using a phosphorus-containing silane coupling agent to prepare a reactive liquid crystal reinforced phase; the preparation method comprises the following steps: blending and banburying the components with a hydrogenated styrene-isoprene-styrene block copolymer, an antioxidant and a peroxide cross-linking agent, carrying out dynamic vulcanization and interface bonding, and carrying out extrusion and electron beam irradiation to finally crosslink. An interpenetrating-topology network structure is formed in the prepared cable material, the crosslinking degree is larger than or equal to 82%, and the cable material is rapid in crosslinking, excellent in oil resistance, low in smoke and free of toxicity and is particularly suitable for super high-rise building hanging cables, deep sea exploration cables and new energy automobile liquid cooling cables.

The invention provides a food packaging bag and a preparation method thereof. The food packaging bag comprises the following raw materials in parts by mass: 50 parts of polylactic acid, 50-100 parts of poly (butylene adipate-co-terephthalate), 5-10 parts of a plasticizer and 5-10 parts of a modified filler, wherein the modified filler comprises a multi-arm grafted filler, the end group of each arm is an acyl chloride group, and each arm comprises a polyethylene glycol chain segment. According to the food packaging bag, polylactic acid and poly (butylene adipate-co-terephthalate) are used as main materials, meanwhile, the brittleness of the food packaging bag is further reduced and the flexibility of the food packaging bag is improved by using a plasticizer, and in addition, by adding a modified filler comprising a multi-arm grafted filler, the food packaging bag is more environment-friendly. The multi-arm grafted filler can improve the barrier property of the food packaging bag on the premise of not deteriorating the flexibility of the food packaging bag, so that the obtained food packaging bag has good flexibility and barrier property.

The invention discloses an antibacterial sanitary towel packaging bag and a preparation method thereof. The antibacterial sanitary towel packaging bag comprises a base material layer, an antibacterial layer and a leakage-proof layer. The base material layer is prepared by blending modified polylactic acid, polybutylene adipate and the like and contains a degradation accelerant; the antibacterial layer contains antibacterial peptide-loaded nano montmorillonite, chitosan and the like, and loofah sponge fiber enhances slow release; and the leakage-proof layer is an ethylene-vinyl acetate copolymer and modified silicon dioxide blended film and is provided with breathable micropores. The preparation method comprises the steps of forming the base material layer, coating the antibacterial layer and the like, and process parameters of each layer are accurately controlled. According to the packaging bag, through cooperation of three layers, the bacteriostasis rate of the packaging bag on escherichia coli and staphylococcus aureus in 24 hours is higher than 99%, the degradation rate of the packaging bag in 83 days is higher than 88%, the oxygen permeability is 4.5-5.2 cm < 3 > / (m224h 0.1 MPa), and the packaging bag has the advantages of long-acting antibiosis, air permeability, leakage prevention, environmental protection, degradation and good mechanical properties, and meets the storage and use requirements of sanitary napkins.

The invention relates to the technical field of composite film preparation, in particular to a multi-additive synergistic enhanced degradable packaging composite film and a preparation method thereof, and the multi-additive synergistic enhanced degradable packaging composite film comprises a matrix material group, a barrier system, an anti-hydrolysis system and a stable system; the base material comprises the following components in parts by mass: 25-35 parts of polylactic acid; 15 to 25 parts of poly (butylene adipate / terephthalate); and 8-15 parts of thermoplastic starch. Through multi-dimensional collaborative design of the matrix material, the barrier system, the hydrolysis-resistant system and the stable system, the performance bottleneck of a traditional material is broken through, and the contradiction between brittleness and flexibility is solved through rigid-flexible blending of matrix components; according to the present invention, the uniform dispersion and the interface strengthening of the nano-filler are ensured by using the melt co-extrusion and the directional arrangement technology, and the composite film prepared by using the process has characteristics of excellent degradation rate, high strength, high barrier property and environmental adaptability, can be widely used in the high-end fields of cold chain food and medicine packaging, and solves the problems existing in the traditional technology.

The application belongs to the technical field of plastics, and particularly relates to a degradable antibacterial plastic packaging bag and a preparation method thereof. The degradable antibacterial plastic packaging bag comprises the following raw materials in parts by weight: polycaprolactone 70-90 parts; polybutylene adipate terephthalate 20-40 parts; Cr and Cu co-modified ZIF-8 5-20 parts; and cerium oxide tannic acid material 2-6 parts. The Cr and Cu co-modified ZIF-8 synergistically improves the antibacterial performance of the packaging bag, and the addition of the cerium oxide tannic acid material further improves the antibacterial performance of the packaging bag. Moreover, the degradable antibacterial plastic packaging bag prepared by the application has excellent mechanical properties.

The invention relates to the field of processing of full-biodegradable high polymer materials, in particular to a weather-resistant master batch and a preparation method and application thereof, and the weather-resistant master batch comprises the following components: 40-70 parts by weight of poly (butylene adipate-co-terephthalate); 10 to 20 parts of polylactic acid; 20-40 parts by weight of a supported ultraviolet absorbent; 15-25 parts by weight of modified talcum powder; 1-3 parts by weight of a light stabilizer; 1-3 parts by weight of a lubricant; 1-3 parts by weight of an antioxidant; the invention discloses a degradable mulching film and a preparation method thereof.The degradable mulching film is prepared from, by weight, 1-3 parts of a supported ultraviolet absorbent, 1-3 parts of modified talcum powder and 1-3 parts of a chain extender, the degradable mulching film comprises weather-proof master batches and poly (adipic acid) / butylene terephthalate, and the mass ratio of the weather-proof master batches to the poly (adipic acid) / butylene terephthalate is (5-15): (85-95). The ultraviolet aging resistance of the degradable mulching film is further improved.

The invention discloses a high-elastic material for an anti-slip sole and a preparation method of the high-elastic material in the field of high polymer materials. The high-elastic material is prepared from the following raw materials: modified polyurethane, modified silicone rubber, calcium carbonate, dicumyl peroxide, 2-mercaptobenzothiazole, N-isopropyl-N '-phenyl p-phenylenediamine and naphthenic oil. Wherein the modified polyurethane is prepared by the following steps: carrying out vacuum dehydration on polybutylene adipate, reacting with toluene diisocynate to prepare an isocyanate-terminated prepolymer, adding dimethylolpropionic acid, triethylamine and deionized water to obtain a water-based dispersion, and carrying out graft copolymerization on the water-based dispersion, methyl methacrylate and the like; the preparation method comprises the following steps: preheating modified polyurethane, mixing with modified silicone rubber at a high speed, adding calcium carbonate and naphthenic oil, carrying out double-roller open milling and thin-passing, adding a vulcanizing agent and the like, carrying out overturning milling, and carrying out flat plate vulcanization molding. The material is used for anti-skid soles, and has the advantages of high elasticity, lasting skid resistance and excellent weather resistance.

The invention provides a hyaluronic acid liposome with double anti-wrinkle and skin feeling improving functions, a preparation method thereof, essence, a mask, a toning lotion and application, and relates to the field of cosmetics. The hyaluronic acid liposome with the dual anti-wrinkle and skin feeling improving functions is prepared from the following raw materials in percentage by mass: 1 percent to 5 percent of hydrogenated lecithin, 0.5 percent to 1.5 percent of PEG-60 hydrogenated castor oil, 0.5 percent to 2 percent of Pellicer L-30, 2 percent to 10 percent of PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerol, 2 percent to 50 percent of glycerol, 1 percent to 2 percent of hexanediol, 5 percent to 15 percent of polydimethylsiloxane, 0.05 percent to 0.5 percent of micromolecular hydrolyzed sodium hyaluronate, 0.05 percent to 0.1 percent of macromolecular sodium hyaluronate and the balance of water, wherein the total mass of the raw materials is 100 percent. Meanwhile, micromolecular hyaluronic acid and macromolecular hyaluronic acid are wrapped, so that the synergistic effect of the large and small molecular hyaluronic acid is realized.

The invention discloses a jacquard vamp material based on bio-based degradable polylactic acid (PLA) and a preparation method thereof, and relates to the technical field of shoe materials. The jacquard vamp material is of a three-layer jacquard structure formed by integrally weaving PLA composite filaments through a jacquard warp knitting machine. The PLA composite filament is prepared from the following raw materials in parts by weight: 80-95 parts of polylactic acid (PLA) slices, 5-15 parts of poly (butylene adipate / terephthalate) (PBAT), 3-8 parts of a flexibilizer, 1-3 parts of a compatilizer, 0.5-2 parts of an anti-hydrolysis agent and 0.5-1.5 parts of a lubricant. According to the invention, the bio-based PLA is used as a main raw material and is matched with degradable auxiliaries such as PBAT, so that the whole vamp material can be completely biodegraded under a composting condition, the problem of environmental pollution of a traditional vamp is fundamentally solved, and meanwhile, through blending modification of PBAT and the flexibilizer, the flexibility and impact resistance of the PLA material are remarkably improved, and the vamp material has good application prospects. The requirements of the vamp material on softness, wear resistance and durability can be met.

The invention relates to the technical field of biodegradable high polymer materials, in particular to a tear-resistant high-barrier biodegradable mulching film and a preparation method thereof, and the tear-resistant high-barrier biodegradable mulching film is prepared from the following raw materials in parts by weight: 60-90 parts of poly (butylene adipate-co-terephthalate); 10 to 40 parts of poly (propylene carbonate); 0.5-5 parts of a plasticizer; 0.05 to 0.3 part of a cross-linking agent; 0.1 to 10 parts of talcum powder; 0.1 to 2 parts of a lubricant; 0.1-1 part of an anti-blocking agent; 0.1 to 1 part of an antioxidant; 0.1 to 1 part of an anti-ultraviolet agent; 0.1-1 part of a light stabilizer; 0.1 to 1 part of an anti-hydrolysis agent; 0.1-1 part of a nucleating agent; the plasticizer is poly (1, 2-propylene glycol adipate); and the cross-linking agent is 1, 4-bis (tert-butylperoxy) diisopropyl benzene. The film has good mechanical properties and water vapor transmission amount, can be completely biodegraded, and has good aging resistance.

The invention relates to a fully-degradable PLA composite material with ceramic characteristics and a preparation method thereof. The fully-degradable PLA composite material is prepared from the following raw materials in percentage by weight: 25-45% of PLA, 5-13% of PBS, 48-60% of a filling agent and the balance of a processing aid, the filler is obtained by modifying an inorganic filler through a modifier; the modifier is prepared from methyl hydrogen-containing polysilazane and a bio-based maleic anhydride graft; the bio-based maleic anhydride graft is a composition of one or more of maleic anhydride grafted poly (butylene adipate-co-terephthalate), maleic anhydride grafted polyvinyl alcohol and octenyl succinic anhydride modified starch. Through the synergistic effect of the inorganic components of the filling agent, the proportion of PLA / PBS and the modifier, the filling agent has the advantages that the filling effect is good; the material is matched with the use requirement of the ceramic flying saucer on key indexes, and all components have bio-based or degradable characteristics, so that the dual targets of'ceramic performance bionics' and'environment-friendly controllable degradation 'are achieved.

To provide a new microorganism capable of decomposing biodegradable plastic, especially polylactic acid (PLA) or polybutylene adipate terephthalate (PBAT).　The microorganism according to the present disclosure belongs to the family Bacillaceae, and has been deposited under Accession No. NITE BP-04083.

The invention belongs to the technical field of preparation of molecular materials and adhesive tapes, and discloses a degradable mylar adhesive tape and a preparation method thereof, the degradable mylar adhesive tape comprises a degradable base material layer and a degradable adhesive layer; the degradable base material layer is prepared from the following raw materials in parts by mass: 25-35 parts of poly (butylene succinate) (PBS), 20-30 parts of polylactic acid (PLA), 10-15 parts of polycaprolactone (PCL), 8-12 parts of modified bamboo fiber powder, 3-5 parts of a compatibilizer and 0.5-1 part of an antioxidant; the degradable adhesive layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of a modified starch-based adhesive, 15 to 25 parts of poly (butylene adipate-co-terephthalate) (PBAT), 10 to 15 parts of polyhydroxyalkanoate (PHA), 5 to 8 parts of sodium alginate-chitosan composite gel, 5 to 8 parts of an epoxypropane modifier, 1 to 2 parts of a cross-linking agent and 0.3 to 0.5 part of a de-foaming agent; by optimizing the raw material composition and the preparation process of the base material and the adhesive, the full-life-cycle degradability of the adhesive tape is realized, and meanwhile, excellent mechanical properties, insulativity and temperature resistance are ensured.

To provide a new microorganism capable of decomposing biodegradable plastic, especially polylactic acid (PLA) or polybutylene adipate terephthalate (PBAT).SOLUTION: The microorganism according to the present disclosure belongs to the family Bacillaceae, and has been deposited under Accession No. NITE BP-04083.SELECTED DRAWING: Figure 3

The invention discloses a method for enhancing the biological nitrogen fixation capacity of soil based on micro-plastics, which comprises the following steps: adding poly (adipic acid-butylene terephthalate) micro-plastics into target soil, and the addition amount is 0.2-2% of the mass of the soil. The activity of dehydrogenase and urease of rhizosphere microorganisms is activated through the degradation process of the poly (butylene adipate-co-terephthalate) micro-plastic in soil, and microorganism groups with a nitrogen fixation function are specifically enriched, so that the expression of nitrogen fixation genes is up-regulated, the biological nitrogen fixation capacity of the soil is enhanced, and the nitrogen condition of the soil is improved.

The invention discloses a preparation method of a high-resilience foaming material, which comprises the following steps: S10, by taking modified thermoplastic polyurethane as a base material, carrying out permeation saturation on the base material by adopting supercritical fluid to obtain a saturated material; the soft segment of the base material is formed by copolymerizing polybutylene adipate and polycaprolactone, and the mass ratio of the polybutylene adipate to the polycaprolactone is (8: 1)-(9: 1); s20, the saturated material is subjected to injection molding to form a small blank; wherein during injection molding, the melt temperature ranges from 200 DEG C to 230 DEG C, the melt pressure ranges from 15 MPa to 25 MPa, and the mold temperature ranges from 20 DEG C to 40 DEG C; and S30, heating and foaming the small blank to obtain the high-resilience foaming material. Wherein the heating temperature of the foaming mold is that the upper mold is 185 DEG C + / -2 DEG C, the lower mold is 190 DEG C + / -2 DEG C, and the holding pressure is 7-9 MPa. The foaming material prepared by the preparation method has a rebound rate which is greater than 80%.

The invention relates to the technical field of environment-friendly materials, and discloses an environment-friendly plastic bag which is of a three-layer composite structure composed of the following raw materials in parts by weight: an outer layer, 60-80 parts of polylactic acid, 40-60 parts of poly (adipic acid) or butylene terephthalate with a thickness ratio of 40%, and a middle layer, 75-90 parts of modified cassava starch, 25-35 parts of polyvinyl alcohol and 3-8 parts of a citrate cross-linking agent with a thickness ratio of 30%. The inner layer comprises 80-95 parts of polyhydroxybutyrate valerate and 15-25 parts of surface treatment calcium carbonate, the thickness ratio of the inner layer is 30%, the three layers are integrally formed through a co-extrusion film blowing process, and a micron-sized groove array is arranged on the surface of the outer layer. The outer layer adopts the blend of polylactic acid and dibutyl phthalate, the brittleness of polylactic acid is made up by utilizing the flexibility of dibutyl phthalate, and meanwhile, the use amount of pure polylactic acid is reduced, so that the cost is reduced by 40% compared with that of a pure polylactic acid bag; and 15 wt% of stearic acid is added into the inner layer polyhydroxybutyrate valerate to treat calcium carbonate, so that the performance is ensured, and the cost is controlled at the same time.

The invention provides a non-metallocene catalyst as well as a preparation method and application thereof, the molecular structure of the non-metallocene catalyst is as shown in formula 1: in the formula 1, R1 and R2 are independently one of H, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl and tert-butyl. The non-metallocene catalyst provided by the invention has an open space structure and a multi-metal active center, and can catalyze butene-1 to generate a polymerization reaction with high activity, so that a bimodal wide-distribution polybutylene product is prepared.

The invention discloses a full-biodegradable bag and a preparation method thereof in the technical field of biodegradable materials.According to the full-biodegradable bag, polylactic acid and poly (butylene adipate-co-terephthalate) serve as matrixes, and performance optimization is achieved by adding a specially-made nanofiber interpenetrating network compatibilizer and a star-shaped structure bio-based plasticizer; wherein the nanofiber interpenetrating network compatibilizer is prepared by grafting polylactic acid and poly (butylene adipate-co-terephthalate) chain segments on cellulose nanofibers through an atom transfer radical polymerization technology, and the star-shaped structure bio-based plasticizer is prepared through ring opening polymerization and melt grafting technologies. In addition, the formula also comprises a maleimide modified lignin filler, an ethylene bis stearamide lubricant and an antioxidant. Through the synergistic effect of the two specially-made modified compounds, the compatibility of all the components is remarkably improved, the preparation process is simple and reliable and suitable for industrial production, and the problem of white pollution of traditional plastic products can be effectively solved.

The invention relates to the technical field of polyester degradable plastics, and particularly discloses an automotive trim composite material with antistatic and sound-absorbing functions and a preparation method thereof. The composite material comprises a composite material body and a sound absorbing material compounded on the surface of the composite material body, comprising the following components in parts by weight: 50-70 parts of a compound resin matrix of polylactic acid and poly (adipic acid-butylene terephthalate), 20-35 parts of multifunctional reinforced fibers, 5-10 parts of a structural conductive antistatic agent and 0.05-0.21 part of a microbial degradation triggering agent. The preparation method comprises the steps of fiber pretreatment and modification, conductive master batch preparation, raw material drying, mixing molding, sound-absorbing material compounding and the like. According to the invention, synergism of long-acting antistatic property, high sound absorption, controllable degradation and excellent mechanical property is realized, migration of an antistatic agent is avoided, the sound absorption coefficient is high, degradation is controllable, the process is simple, industrialization is feasible, and the composite material is suitable for automotive interior parts.

The invention belongs to the technical field of high polymer materials, and particularly relates to an anti-aging sole material and a preparation method thereof.The anti-aging sole material comprises, by weight, 60-80 parts of SBS, 20-30 parts of HNBR, 3-6 parts of an antibacterial agent, 12-14 parts of inorganic filler, 6-8 parts of softening oil, 3-5 parts of a silane coupling agent, 2-3 parts of a vulcanizing agent, 3-5 parts of a vulcanization accelerator, 2-6 parts of D230 polyether amine and 2-6 parts of a phenolic resin tanning agent. SBS comprises hydrogenated SBS and oil-filled SBS, the hydrogenated SBS and HNBR have a synergistic effect, the hydrogenated SBS converts a polybutadiene chain segment into a more stable polyethylene / polybutylene chain segment through hydrogenation saturated double bonds, and the ultraviolet aging resistance is remarkably improved; and a hydrogenated structure of HNBR further blocks an oxidation chain reaction, so that the tensile strength of the material after QUV aging is relatively high. The oil-filled SBS improves the processability, reduces the melt viscosity, improves the mixing efficiency, and maintains the elasticity of the material at the same time.

This invention provides a high-performance implantable biomedical product based on polylactic acid (PLA) and its preparation method. The preparation method, by weight, involves first melt-blending 10-20 parts of polybutylene adipate succinate (PSA) with 1-2 parts of hydroxyapatite to obtain a PBSA / HA mixture; then mixing 78-89 parts of PLA with PBSA / HA and extruding the mixture via a twin-screw extruder to obtain PLA / PBSA / HA granules; finally, using a micro-injection molding process to prepare the high-performance implantable biomedical product. This method induces a strong shear field through micro-injection molding, enabling in-situ fiber formation of the PBSA dispersed phase within the PLA matrix. Simultaneously, the addition of a specific amount of hydroxyapatite significantly enhances the product's toughness, resulting in a product with excellent biocompatibility and osteoinductive activity.

The present invention relates to a polybutylene adipate terephthalate resin having a controlled biodegradation rate and excellent coatability and an article comprising same.

An optically anisotropic polymer thin film includes a crystallizable polymer and an additive configured to interact with the polymer (e.g., via π-π interactions) to facilitate chain alignment and, in some examples, create a higher crystalline content within the polymer thin film. The polymer thin film may be characterized by a bimodal molecular weight distribution where the molecular weight of the additive may be less than approximately 50% of the molecular weight of the crystallizable polymer. Example crystallizable polymers include polyethylene naphthalate, polyethylene terephthalate, polybutylene naphthalate, polybutylene terephthalate, as well as derivatives thereof. Example additives, which may occupy up to approximately 10 wt. % of the polymer thin film, include aromatic ester oligomers, aromatic amide oligomers, and polycyclic aromatic hydrocarbons, for example. The optically anisotropic polymer thin film may be characterized by a refractive index greater than approximately 1.7 and an in-plane birefringence greater than approximately 0.2.