Polylactic Acid Resin Composition

The present invention relates to a polylactic acid resin composition having eco-friendly properties, which can be effectively used as a packaging material due to improved flexibility and moisture resistance, as well as superior general properties such as mechanical properties, transparency, heat resistance, an anti-blocking property, and film processability. 1. A polylactic acid resin composition comprising:{'sub': 'bio', 'a polylactic acid resin comprising a hard segment comprising a polylactic acid repeating unit of Formula 1 and a soft segment comprising a polyolefin-based polyol repeating unit in which polyolefin-based polyol structural units of Formula 2 are linked in a linear or branched manner via a urethane bond or an ester bond, wherein the organic carbon content (% C) of biomass-based carbon, as defined in Equation 1, is at least 60 wt %, wherein, in Formulae 1 and 2, n is an integer from 700 to 5,000, and m+1 is an integer from 5 to 200; and'} {'chemistry': {'@id': 'CHEM-US-00003', '@num': '00003', 'img': {'@id': 'EMI-C00003', '@he': '48.51mm', '@wi': '69.85mm', '@file': 'US20160053089A1-20160225-C00003.TIF', '@alt': 'embedded image', '@img-content': 'chem', '@img-format': 'tif'}}, 'br': None, 'sub': 'bio', 'sup': 14', '12', '14', '12, '% C=(weight ratio of C isotope to C of the total carbon content in the polylactic acid resin)/(weight ratio of C isotope to C of the total carbon content in a biomass-based carbon standard material). \u2003\u2003[Equation 1]'}, 'an antioxidant2. The polylactic acid resin composition of claim 1 , wherein the C isotope content based on the total weight of carbon in the polylactic acid resin is 7.2×10to 1.2×10wt %.3. The polylactic acid resin composition of claim 1 , wherein the soft segment has the organic carbon content (% C) of biomass-based carbon claim 1 , as defined in Equation 1 claim 1 , of at least 70 wt %.4. The polylactic acid resin composition of claim 1 , wherein the polylactic acid resin has a number average ...

Method for producing adipamide as intermediate for production of raw material for bio-based nylon

Disclosed is a method for producing adipamide, which may include the steps of: (a) reacting glucose, nitric acid (HNO 3 ), sodium nitrite (NaNO 2 ) and potassium hydroxide (KOH) to produce a glucaric acid potassium salt, (b) producing glucamide by reacting the glutaric acid potassium salt, with an acidic solution and removing a potassium ion from the glucaric acid potassium salt, (c) preparing an reaction admixture by adding the glucamide and a catalyst to hydrogen halide and acetic acid, and (d) treating the reaction admixture with hydrogen gas in a reactor thereby producing the adipamide.

POLYLACTIC ACID RESIN AND PACKAGING FILM COMPRISING THE SAME

The present invention relates to a polylactic acid resin which is environment-friendly and is useful as a packaging material due to its properties including excellent heat resistance and flexibility, and a packaging film comprising the same. 1. A polylactic acid resin , comprising:a hard segment comprising a polylactic acid repeating unit of the following Chemical Formula 1; anda soft segment comprising a polyurethane polyol repeating unit in which polyether polyol repeating units of the following Chemical Formula 2 are linearly linked via a urethane bond, {'chemistry': {'@id': 'CHEM-US-00003', '@num': '00003', 'img': {'@id': 'EMI-C00003', '@he': '29.97mm', '@wi': '69.85mm', '@file': 'US20150147549A1-20150528-C00003.TIF', '@alt': 'embedded image', '@img-content': 'chem', '@img-format': 'tif'}}, 'br': None, 'sup': 14', '12', '14', '12, '% Cbio=(Weight ratio of C isotope to C isotope among the total carbon atoms contained in the polylactic acid resin)/(Weight ratio of C isotope to C isotope among the total carbon atoms contained in a standard material from the biomass source)\u2003\u2003[Equation 1]'}, 'wherein the polylactic acid resin has an organic carbon content (% Cbio) from the biomass source defined by the following Equation 1 of 60 wt % or morein the Chemical Formulae 1 and 2, A is a linear or branched alkylene of 2 to 5 carbon atoms, m is an integer of 10 to 100, and n is an integer of 700 to 5000.2. The polylactic acid resin of claim 1 , wherein the C isotope is contained in a content of 0.7×10wt % to 1.2×10wt % based on the total content of the carbon atoms contained in the polylactic acid resin.3. The polylactic acid resin of claim 1 , having the organic carbon content (% Cbio) from the biomass source defined by the Equation 1 of 70 wt % or more.4. The polylactic acid resin of claim 1 , wherein a generating amount of COin preparation of 1 kg of the polylactic acid resin is 1.0 kg or less claim 1 , when the polylactic acid resin is evaluated by the standard ...

Thermally adhesive flexible polylactic acid resin composition

The present invention relates to a polylactic acid resin composition which has a low glass transition temperature, fusion temperature, and enthalpy of fusion, can be crystallized under commercially meaningful processing conditions, has good film processability such as extrusion properties, has excellent storage stability, and is highly biodegradable. The polylactic acid resin composition comprises a block copolymer comprising a hard segment and a soft segment, the hard segment comprising polylactic acid repeat units, and the soft segment comprising polyurethane polyol repeat units which have polyether-based polyol repeat units linearly connected via a urethane bond, wherein the soft segment is contained by 5% to 35% by weight based on the weight of the block copolymer, and the polylactic acid repeat units include poly(L-lactic acid) repeat units and poly(D-lactic acid) repeat units by a molar ratio of 94:6 to 88:12.

POLYLACTIC ACID RESIN COMPOSITION FOR 3D PRINTING

A polylactic acid resin composition, which comprises: a hard segment containing a polylactic acid repeat unit; and a soft segment containing a polyurethane polyol repeat unit in which polyether-based polyol repeat units are linearly connected to each other via a urethane linkage, can be processed at low temperatures and at high rates, has a high solidification rate, and is eco-friendly, due to a low melting point thereof, and thus is useful for 3D printing. 2. The composition according to claim 1 , wherein the composition comprises (a) the hard segment in an amount of 65 to 95% by weight and (b) the soft segment in an amount of 5 to 35% by weight claim 1 , relative to the total weight of the composition.3. The composition according to claim 1 , wherein the polyether-based polyol repeat unit is at least one selected from the group consisting of a polyetherglycol (PEG) repeat unit claim 1 , a poly(1 claim 1 ,2-propyleneglycol) repeat unit claim 1 , a poly(1 claim 1 ,3-propanediol) repeat unit claim 1 , a polytetramethyleneglycol repeat unit claim 1 , a polybutyleneglycol repeat unit claim 1 , a repeat unit of a polyol formed by copolymerization of propylene oxide and tetrahydrofurane claim 1 , a repeat unit of a polyol formed by copolymerization of ethylene oxide and tetrahydrofurane claim 1 , and a repeat unit of a polyol formed by copolymerization of ethylene oxide and propylene oxide.4. The composition according to claim 1 , wherein the urethane bond is formed by a reaction between a terminal hydroxyl group in the polyether-based polyol repeat unit and a diisocyanate compound.5. The composition according to claim 4 , wherein the diisocyanate compound is at least one selected from the group consisting of 1 claim 4 ,6-hexamethylene diisocyanate claim 4 , 2 claim 4 ,4-toluene diisocyanate claim 4 , 2 claim 4 ,6-toluene diisocyanate claim 4 , 1 claim 4 ,3-xylene diisocyanate claim 4 , 1 claim 4 ,4-xylene diisocyanate claim 4 , 1 claim 4 ,5-naphthalene diisocyanate ...

Polylactic acid resin composition for 3D printing

A polylactic acid resin composition, which comprises: a hard segment containing a polylactic acid repeat unit; and a soft segment containing a polyurethane polyol repeat unit in which polyether-based polyol repeat units are linearly connected to each other via a urethane linkage, can be processed at low temperatures and at high rates, has a high solidification rate, and is eco-friendly, due to a low melting point thereof, and thus is useful for 3D printing.

Method for producing adipamide as intermediate for production of raw material for bio-based nylon

Disclosed is a method for producing adipamide, which may include the steps of: (a) reacting glucose, nitric acid (HNO 3 ), sodium nitrite (NaNO 2 ) and potassium hydroxide (KOH) to produce a glucaric acid potassium salt, (b) producing glucamide by reacting the glucaric acid potassium salt, with an acidic solution and removing a potassium ion from the glucaric acid potassium salt, (c) preparing an reaction admixture by adding the glucamide and a catalyst to hydrogen halide and acetic acid, and (d) treating the reaction admixture with hydrogen gas in a reactor thereby producing the adipamide.

Polylactic acid resin composition

Composición de resina de ácido poliláctico

Una composición de resina de ácido poliláctico que comprende: una resina de ácido poliláctico que comprende un segmento duro que incluye una unidad repetitiva de ácido poliláctico de la fórmula 1 y un segmento blando que comprende una unidad repetitiva de poliol a base de poliolefina en el cual las unidades estructurales de poliol a base de poliolefina de la fórmula 2 están unidas de una manera lineal o ramificada vía un enlace uretano o un enlace éster, en la que el contenido de carbono orgánico (%Cbio) de carbono basado en biomasa, como se define en la ecuación 1, es por lo menos 60 % en peso, en la que, en las fórmulas 1 y 2, n es un entero de 700 a 5,000, y m + 1 es un entero de 5 a 200; y un antioxidante:**Fórmula** % Cbio >= (relación en peso del isótopo 14C al 12C del contenido de carbono total en la resina de ácido poliláctico) / (relación en peso del isótopo 14C al 12C del contenido de carbono total en un material estándar de carbono a base de biomasa)

Laminate for radiational cooling and material for radiational cooling containing the same

The present disclosure relates to a laminate for radiational cooling including a substrate layer containing a matrix of an infrared light-radiating polymer containing polycarbonate-based polyurethane and particles of a visible light-reflecting inorganic material, and an ultraviolet light-reflecting coating layer formed on the substrate layer and containing an expanded fluorine-based polymer, wherein the ultraviolet light-reflecting coating layer is porous.

Method for preparing nanocellulose using nonionic surfactants

A technique for physical interaction of nanocellulose, a method of separating nanocellulose from water in an aqueous solution using a physical interaction promoter, and a method for synthesis of a cellulose interaction promoter capable of increasing the dispersibility of nanocellulose in a polymer matrix and improving the physical properties of a polymer composite material are provided.

Manufacturing method for a composite sheet

A manufacturing method for a composite sheet having excellent rigidity, no shape deformation, and excellent transparency is disclosed. By laminating a film obtained by impregnating a composite resin on a wet cake including cellulose nanofibers and glycerol, rigidity and transparency may be maximized, and a flat and thick composite sheet may be provided.

Method for synthesizing compound in which acetoxylation reaction is applied to lactic acid derivative

A synthesis method according to the present disclosure includes preparing a mixture by mixing a lactic acid derivative, alkyl acetate, and methane sulfonic acid, and obtaining a final product by inputting alkyl acetate in the process of removing a distillate through fractional distillation of the mixture.

Method for nitrilation reaction of acrylic acid ester

A method for nitrilation reaction of acrylic acid ester using a metal-doped titanium dioxide (TiO2) catalyst includes synthesizing a metal-doped titanium dioxide (TiO2) catalyst by mixing a titanium precursor, a metal precursor and an acid solvent, and obtaining a final product by injecting a gas containing ammonia and ethyl acrylate to the catalyst.