Abstract:
PROBLEM TO BE SOLVED: To provide an expanded polyester material having a good flame-resistant behavior. SOLUTION: The expanded polyester material is an expanded cellular material which is obtained from an aromatic polyester resin by a reactive extrusion foaming of the polyester resin, wherein the polyester foam provided with flame retardancy achieves a total heat release (THR 600s ) less than 6.0 MJ, a fire growth rate (FIGRA) less than 430.0 W/s, a total smoke production (TSP 600s ) less than 165.0 MJ and no flaming droplets/particles within 600 s according to Single Burning Item (SBI) prEN 13823. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To produce a foaming material comprising an aromatic polyester and a polyester blend, foamable by a stable foaming process and containing fine and uniform closed cells. SOLUTION: A chain-extending concentrate is used in production of the foaming material comprising the aromatic polyester and the polyester blend. The chain-extending concentrate comprises an ethylene-acrylate copolymer, a high-temperature thermoplastic resin and a multifunctional compound. The preparation process consists of two steps; (1) mixing and melt blending of the multifunctional compound and the HT thermoplastic resin into a matrix of the ethylene-acrylate copolymer in a closed-type mixer and (2) extrusion of the mixture at a temperature below the melting point or reaction temperature of the multifunctional compound. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a foamed cellular material having high-temperature resistance and rigidity, but is flexible and has a low density. SOLUTION: The foamed cellular material having high-temperature resistance and rigidity, but is flexible and has a low density comprises a polyester blend including about 80-about 98 wt.% high viscosity polyethylene terephthalate (intrinsic viscosity=1.0-1.9 dl/g), about 2-about 20 wt.%, preferably about 5 wt.% polycarbonate having an average molecular weight higher than 4,000 g/mol. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
Material de poliéster expandido dúctil, rígido y altamente resistente a los impactos que comprende unacombinación de poliéster/elastómero acrílico consistente en un mínimo de un 2% en peso de uno o máscopolímeros de acrilato con un contenido en acrilato del 3 al 50% en peso con respecto al copolímero deacrilato y un índice de flujo en fusión de 0,1 a 200 g/10 min a 190ºC/2,16 kg, teniendo el material de poliésteruna elongación antes de rotura por cizalladura superior al 15% (de acuerdo con ISO 1922) y un aceleraciónmáxima g-max inferior a 93 y unos criterios de lesión de cabeza HIC menores de 316 (de acuerdo con ASTMF1292), consistiendo el copolímero de acrilato en una mezcla de una resina de acrilato de etileno no reactiva yuna resina de acrilato de etileno reactiva y obteniéndose el material de poliéster expandido mediantecombinación en fusión del copolímero de acrilato con el poliéster, dispersión de la combinación con uncompuesto multifuncional, un agente de soplado y un agente de nucleación, y expansión de la mezcla,caracterizado por una descompresión inducida por un cambio en el estado termodinámico, a saber por presióno temperatura, o por una deformación, alargamiento o estiramiento uniaxial o biaxial de la mezcla fundida.
Abstract:
Material celular expandido ignífugo de resinas de poliéster aromáticas, obtenido mediante espumado porextrusión de resinas de poliéster, comprendiendo la espuma de poliéster un fosfinato de zinc fundible o una mezcla defosfinatos de zinc fundibles, de fórmula,donde R1 y R2, idénticos o diferentes, son hidrógeno, alquilo(C1-C18) lineal o ramificado y/o arilo, preferentementealquilo(C1-C6) lineal o ramificado y/o fenilo, de forma particularmente preferente metilo, etilo, n-propilo, isopropilo, nbutilo,terc-butilo, n-pentilo o fenilo, en particular fosfinatos de zinc fundibles tales como dimetilfosfinato de zinc,metiletilfosfinato de zinc, difenilfosfinato de zinc, dietilfosfinato de zinc, etilbutilfosfinato de zinc o dibutilfosfinato de zinc,donde los fosfinatos de zinc fundibles tienen un punto de fusión de 40 a 250ºC, preferentemente un punto de fusiónsuperior a 200ºC, una temperatura de descomposición no inferior a 300ºC, y una liberación de calor total (THR600s)inferior a 6,0 MJ, una velocidad de propagación del fuego (FIGRA) inferior a 430,0 W/s, una producción total de humo(TSP600s) inferior a 165,0 MJ y ninguna gota/partícula llameante en un tiempo de 600 s, todos estos parámetrosevaluados de acuerdo con prEN 13823.
Abstract:
La presente invención se refiere a material celular espumoso de baja densidad, resistente a temperaturas altas, rígido, pero flexible comprendido de mezcla de poliéster que consiste desde 80 hasta 98 por ciento por peso de tereftalato de polietileno de alta viscosidad (I.V.=O.1-l.9 dl/g) y desde aproximadamente 2 hasta 20, preferiblemente hasta 5, por ciento por peso de policarbonato con MW promedio más alto que 4000 g/mol.
Abstract:
Manufacturing of polyester based expanded materials made mostly of pre-cleaned and compounded post-consumer polyester by increasing the intrinsic viscosity (IV) during an extrusion process is described. By careful selection of processing conditions and parameters, it is possible to obtain low density polyester foam material with good cellular structure and under stable processing conditions.
Abstract:
The present invention relates to an extrusion line for reactive foam extrusion comprising a primary extruder (1) having a hopper (5) for loading of raw materials into feeding zone of the primary extruder (1), and further comprising a gas injector (7) being arranged in the primary extruder (1), and an extrusion die (9). A side feeding equipment (6a, 12, 16) for loading of reactive additives into the primary extruder (1) is positioned between the feeding zone of the primary extruder 1) and the gas injector (7). The invention further relates to a reactive extrusion process to produce foamed cellular material comprised of a thermoplastic polymer using the above mentioned extrusion line, wherein the thermoplastic polymer is fed into the hopper (5), while reactive additives are loaded into the primary extruder (1) by using a side feeding equipment (6a, 12, 16) located between the feeding zone of the primary extruder (1) and the gas injector (7).
Abstract:
Manufacturing of polyester based expanded materials made mostly of pre-cleaned and compounded post-consumer polyester by increasing the intrinsic viscosity (IV) during an extrusion process is described. By careful selection of processing conditions and parameters, it is possible to obtain low density polyester foam material with good cellular structure and under stable processing conditions.