Abstract:
The invention relates to a method for producing expandable granulates containing polylactic acid, comprising the following steps: a) melting and mixing the constituents i) between 50 and 99.9 wt. %, relative to the total weight of constituents i) to iii), of polylactic acid, ii) between 0 and 49.9 wt. %, relative to the total weight of constituents i) to iii), of at least one other polymer, iii) between 0.1 and 2 wt. %, relative to the total weight of constituents i) to iii), of a diepoxide or polyepoxide, and iv) between 0 and 10 wt. % of at least one additive, b) mixing v) between 3 and 7 wt. %, relative to the total weight of constituents i) to iv), of an organic blowing agent, into the melted polymer mass, by means of a static or dynamic mixer, at a temperature of at least 40°C, c) discharging the mixture via a nozzle plate with boreholes having a maximum on the nozzle outlet diameter of 1.5 mm, and d) granulating the melted mass containing the blowing agent directly behind the nozzle plate, under water, at a pressure of between 1 and 20 bar. The invention also relates to expandable granulates containing polylactic acid, that can be obtained according to said method, and to special expandable granulates containing polylactic acid, and between 3 and 7 wt. % of an organic blowing agent, preferably n-pentane, and especially preferably iso-pentane. The invention also relates to a preferred method for producing expandable granulates containing polylactic acid and a blowing agent, with a low bulk density.
Abstract:
Described are microorganism which are able to reduce the generation of feces odor by decreasing the amount of at least one of the compounds methyl mercaptan, a sulphide compound, cadavarine, putrescine, indole or skatole, and wherein said decrease in the amount of said compounds is independent of the growth of the microorganism. Also described are compositions, comprising such microorganisms, e.g. food, feed or pharmaceutical compositions and the use of such microorganisms for suppressing feces odor or the preparation of foodstuff or feedstuff, as well as corresponding methods for the production of food or feed composition and additives for food, feed or drinks.
Abstract:
The invention relates to a method for producing expandable granulates containing polylactic acid, comprising the following steps: a) melting and mixing the constituents i) between 50 and 99.9 wt. %, relative to the total weight of constituents i) to iii), of polylactic acid, ii) between 0 and 49.9 wt. %, relative to the total weight of constituents i) to iii), of at least one other polymer, iii) between 0.1 and 2 wt. %, relative to the total weight of constituents i) to iii), of a diepoxide or polyepoxide, and iv) between 0 and 10 wt. % of at least one additive, b) mixing v) between 3 and 7 wt. %, relative to the total weight of constituents i) to iv), of an organic blowing agent, into the melted polymer mass, by means of a static or dynamic mixer, at a temperature of at least 40°C, c) discharging the mixture via a nozzle plate with boreholes having a maximum on the nozzle outlet diameter of 1.5 mm, and d) granulating the melted mass containing the blowing agent directly behind the nozzle plate, under water, at a pressure of between 1 and 20 bar. The invention also relates to expandable granulates containing polylactic acid, that can be obtained according to said method, and to special expandable granulates containing polylactic acid, and between 3 and 7 wt. % of an organic blowing agent, preferably n-pentane, and especially preferably iso-pentane. The invention also relates to a preferred method for producing expandable granulates containing polylactic acid and a blowing agent, with a low bulk density.
Abstract:
Película de poliéster de tres capas, biodegradable, de 8 a 20 μm de espesor con una estructura de capas A/B/C o preferiblemente A/B/A, y las dos capas exteriores (A) o (A, C) están compuestas por: Ai) 55 a 99,99% en peso, referido a la mezcla de poliéster de las capas exteriores, de un poliéster seleccionado del grupo compuesto por: polisebacato-co-tereftalato de butileno, polisebacato-co-adipato-co-tereftalato de butileno, polisebacato-co-succinato-co-tereftalato de butileno o mezclas de los mismos o una mezcla de polisebacato-co- tereftalato de butileno y poliadipato-co-tereftalato de butileno; Aii) 0,01 a 5% en peso, referido a la mezcla de poliéster de las capas exteriores, de al menos un aditivo seleccionado del grupo compuesto por: una cera, un plastificante, un agente de nucleación, un agente antiempañante, un material de carga y un agente antibloqueo; y Aiii) 0 a 44,99% en peso, referido a la mezcla de poliéster de las capas exteriores, de otro polímero biodegradable seleccionado del grupo compuesto por: poliácido láctico (PLA), policaprolactona (PCL), polihidroxialcanoato, policarbonato de propileno (PPC) o poliéster preparado a partir de ácidos dicarboxílicos alifáticos y un compuesto dihidroxi-alifático; y la capa intermedia B se compone de: Bai) 40 a 75% en peso, referido a la mezcla de la capa intermedia, de un poliéster alifático-aromático biodegradable; Baii) 25 a 40% en peso, referido a la mezcla de la capa intermedia, almidón con un contenido de plastificante de 0 a 5% en peso, referido al peso total del componente Baii); y Baiii) 0 a 20% en peso, referido a la mezcla de la capa intermedia, de otro polímero biodegradable seleccionado del grupo compuesto por: poliácido láctico (PLA), policaprolactona (PCL), polihidroxialcanoato, policarbonato de propileno (PPC) o poliéster preparado a partir de ácidos dicarboxílicos alifáticos y un compuesto dihidroxi-alifático; o Bbi) 25 a 70% en peso, referido a la mezcla de la capa intermedia, de un poliéster alifático-aromático biodegradable Bbii) 30 a 55% en peso, referido a la mezcla de la capa intermedia de almidón con un contenido de plastificante de 5 a 35% en peso, referido al peso total del componente Bbii); y Bbiii) 0 a 20% en peso, referido a la mezcla de la capa intermedia, de otro polímero biodegradable seleccionado del grupo compuesto por: poliácido láctico (PLA), policaprolactona (PCL), polihidroxialcanoato, policarbonato de propileno (PPC) o poliéster preparado a partir de ácidos dicarboxílicos alifáticos y un compuesto dihidroxi-alifático.
Abstract:
Método para la producción de un compuesto II o una mezcla que contiene el compuesto II, (Compuesto II) donde el método incluye por lo menos las siguientes etapas: (a) poner a disposición un caldo de fermentación que contiene el compuesto I(Compuesto I) Donde R1 es igual a NH4 +, H o a otro catión y R2 puede ser igual a NH4 +, H o a otro catión, y donde por lo menos R1 o R2 es igual NH4 +;(b) transformar el compuesto I en el caldo de fermentación hasta tener el compuesto II (c) separar por destilación en forma simultánea, intermitente o subsiguiente el amoníaco y/o agua; (d) subsiguiente destilación del fondo de destilación de la etapa (c) a presión reducida, donde surge un destiladoque contiene el compuesto II; y (e) aislar el compuesto II o transformar el destilado de la etapa (d).
Abstract:
La presente invención se refiere a un proceso para la obtención de películas de contracción, que contienen: A) 20 a 90 % en peso de un poliéster alifático-aromático biodegradable y B) 10 a 80 % en peso de uno o varios polímeros seleccionados del grupo que consiste de: ácido poliláctico, polipropileno carbonato, policaprolactona, polihidroxialcanoato, quitosan, gluten y uno o varios poliésteres alifático/aromáticos, tales como polibutileno succinato, polibutileno succinatoadipato o polibutileno succinato-sebacato, polibutileno tereftalato-co-adipato; y C) 0 a 2 % en peso de un compatibitizante, seleccionando una relación de soplado inferior o igual a 4:1.
Abstract:
The present invention relates to a method for producing shrink films, comprising: A) 20 to 90 wt % of a biodegradable aliphatic aromatic polyester; B) 10 to 80 wt % of one or more polymers selected from the group comprising: polylactic acid, polypropylene carbonate, polycaprolactone, polyhydroxyalkanoate, chitosan, gluten, and one or more aliphatic/aromatic polyesters such as polybutylene succinate, polybutylene succinate-adipate, or polybutylene succinate-sebacate, polybutylene terephthalate-coadipate; and C) 0 to 2 wt % of a compatibility agent, wherein a blow up ratio of less than or equal to 4:1 is selected.
Abstract:
A process for producing expandable pelletized material comprising polylactic acid by: a) melting and incorporating by mixing i) 50-98.9 wt.-% of polylactic acid, ii) 1-49.9 wt.-% of at least one polyester, iii) 0.1-2 wt.-% of a copolymer comprising epoxy groups and based on styrene, acrylate and/or methacrylate, and iv) 1-5 wt.-% of a nucleating agent, b) incorporating by mixing v) 1-7 wt.-% of an organic blowing agent and 0.01-5 wt-% of a co-blowing agent, into the polymer melt at >= 140°C, c) discharging through a die plate with holes
Abstract:
The invention relates to a method for recycling paper products glued and/or coated with polymers, wherein the paper products glued and/or coated with polymers are placed in an aqueous wastepaper suspension, said wastepaper suspension a) is broken down in the presence of at least one hydrolase, b) is broken down in an alkaline medium, and/or c) is treated in a de-inking process in an alkaline medium, and the polymers are subsequently separated from the wastepaper suspension, wherein the polymers are biodegradable polymers.