摘要:
The present invention relates to biodegradable polymer mixtures comprising i) 40% to 95% by weight, based on the total weight of components i to ii, of at least one polyester based on aliphatic or aliphatic and aromatic dicarboxylic acids and aliphatic dihydroxy compounds; ii) 5% to 60% by weight, based on the total weight of said components i to ii, of polyalkylene carbonate, particularly polypropylene carbonate; iii) 0% to 60% by weight, based on the total weight of said components i to iii, of at least one biodegradable homo- or copolyester selected from the group consisting of polylactic acid, polycaprolactone and polyhydroxyalkanoate, and/or of an inorganic or organic filler; iv) 0% to 10% by weight, based on the total weight of said components i to ii, of an epoxy-containing copolymer based on styrene, acrylic ester and/or methacrylic ester, and v) 0% to 15% by weight of an additive selected from the group consisting of lubricant, antiblocking agent, antistat, UV absorber, UV stabilizer, thermal stabilizer, dye, pigment, colorant, plasticizer, fertilizer and active crop protection ingredient. The present invention further relates to processes for producing biodegradable polymer mixtures, to the use of biodegradable polymer mixtures in the production of moldings, films or fibers and also moldings, films or fibers comprising biodegradable polymer mixtures.
摘要:
The present invention relates to a process for the production of polymer mixtures of i) polypropylene carbonate and ii) at least one further polymer, including the following steps: (a) reaction of propylene carbonate with carbon dioxide in the presence of a zinc catalyst, cobalt catalyst, or lanthanoid catalyst—in excess propylene carbonate or in an aprotic non-water-miscible solvent, (b) addition of an aqueous acidic solution to the reaction mixture after termination of the reaction, (c) removal of the aqueous phase, (d) optionally washing of the remaining organic phase with water, (e) addition of polymer component ii), (f) degassing and drying of the resultant polymer mixture and optionally removal of the aprotic, non-water-miscible solvent, and (g) pelletization of the polymer melt.
摘要:
The present invention relates to biodegradable polymer mixtures comprising i) 40% to 95% by weight, based on the total weight of components i to ii, of at least one polyester based on aliphatic or aliphatic and aromatic dicarboxylic acids and aliphatic dihydroxy compounds; ii) 5% to 60% by weight, based on the total weight of said components i to ii, of polyalkylene carbonate, particularly polypropylene carbonate; iii) 0% to 60% by weight, based on the total weight of said components i to iii, of at least one biodegradable homo- or copolyester selected from the group consisting of polylactic acid, polycaprolactone and polyhydroxyalkanoate, and/or of an inorganic or organic filler; iv) 0% to 10% by weight, based on the total weight of said components i to ii, of an epoxy-containing copolymer based on styrene, acrylic ester and/or methacrylic ester, and v) 0% to 15% by weight of an additive selected from the group consisting of lubricant, antiblocking agent, antistat, UV absorber, UV stabilizer, thermal stabilizer, dye, pigment, colorant, plasticizer, fertilizer and active crop protection ingredient. The present invention further relates to processes for producing biodegradable polymer mixtures, to the use of biodegradable polymer mixtures in the production of moldings, films or fibers and also moldings, films or fibers comprising biodegradable polymer mixtures.
摘要:
Production of polyalkylene carbonates via polymerization of carbon dioxide with at least one epoxide of the general formula (I): where R re mutually independently H, halogen, NO2, CN, COOR′ or C1-20-hydrocarbon moiety, which can have substitution, where one of the moieties R can also be OH, and where two moieties R can together form a C3-5-alkylene moiety, R′ is H or C1-20-hydrocarbon moiety, which can have substitution; n a zinc salt of C4-8-alkanedicarboxylic acids as catalysts, where a carboxylic acid or an acidic ion exchanger and a non-water-miscible organic solvent which dissolves the polyalkylene carbonate are admixed with the reaction mixture obtained after the reaction, and the organic phase is washed with water, and the polyalkylene carbonate is optionally obtained from the organic phase.
摘要:
Zinc salts of C4-8-alkanedicarboxylic acids, obtainable by reacting C4-8-alkanedicarboxylic acids with surface-modified zinc oxide particles, said surface-modified zinc oxide particles being obtainable by treatment of zinc oxide particles with organosilanes, silazanes and/or polysiloxanes and subsequent heat treatment and/or UV irradiation of treated zinc oxide particles, and the use thereof as polymerization catalysts for the preparation of polyalkylene carbonates.
摘要:
The invention relates to foam comprising hollow microbeads and intended for sound absorption, comprising from 40 to 85% by weight of open-cell polymer foam and from 15 to 60% by weight of hollow microbeads with flexible external layer, where the D50 value of the hollow microbeads is at least 70 μm and at most 250 μm, based on the total weight of polymer foam and hollow microbeads, and also to a process for producing the same, comprising the following steps: I) impregnation of an open-cell polymer foam with a liquid dispersion comprising expandable hollow microbeads, II) if appropriate, pressing/compression and/or drying of the polymer foam, and III) heat-treatment of the impregnated polymer foam at a temperature above the expansion temperature and below the decomposition temperature of the expandable hollow microbeads, for the expansion of the hollow microbeads.
摘要:
The present invention relates to a cleaning implement based on melamine-formaldehyde foam comprising hollow microspheres, wherein said hollow microspheres have a median particle diameter (D50, volume averaged, Malvern, Fraunhofer diffraction) in the range from 260 μm to 490 μm, and wherein the hollow microsphere are at least partly filled with a benefit agent. Additionally the present invention encompasses a method for cleaning a hard surface with a cleaning implement according to the present invention.
摘要:
The invention relates to open-cell melamine resin foams filled with nanoporous particles, especially aerogels or aerosils, and production and use of said foams.
摘要:
Novel melamine-formaldehyde foams comprising microcapsules built into the structure of the condensation products and also processes for the production thereof and uses thereof.
摘要:
The present invention relates to melamine-formaldehyde foams comprising hollow microspheres wherein said hollow microspheres have a median particle diameter (D50, volume averaged, Malvern, Fraunhofer diffraction) in the range from 260 μm to 490 μm, and also processes for producing these melamine-formaldehyde foams and their uses.