Abstract:
Described is paper or cardboard packaging produced from mineral oil contaminated, (e.g., recycled) paper, wherein the packaging includes a barrier layer obtainable by applying an aqueous polycarbonate dispersion. The barrier layer may be situated on one of the surfaces of the packaging or form one of multiple layers of a multilayered packaging coating or be situated as a coating on one side of an inner bag situated within the packaging
Abstract:
The present invention relates to a polyester comprising units derived from monomers A, B and C, wherein the group of monomers A consists of (a1) monomers A1, or (a2) monomers A1 and monomers A2, with monomers A1 and monomers A2 being present in a molar ratio of at least 31:69, preferably at least 4:1, wherein the monomers A1 are selected from the group consisting of aromatic sulfonated dicarboxylic acid based monomers of general formulae (I), (II), (III) and (IV), and wherein the monomers A2 are selected from the group consisting of non-sulfonated aromatic dicarboxylic acid based monomers of general formulae (V), (VI) and (VII); and wherein the group of monomers B consists of (b1) monomers B1, or (b2) monomers B1 and monomers B2, with monomers B1 and monomers B2 being present in a molar ratio of at least 1:9, preferably at least 4:1, wherein the monomers B1 are selected from the group consisting of unsaturated dicarboxylic acid based monomers of general formula (VIII), and wherein the monomers B2 are selected from the group consisting of saturated dicarboxylic acid based monomers of general formula (IX); and wherein the group of monomers C consists of (c1) monomers C1, (c2) monomers C2, or (c3) monomers C1 and C2, wherein the monomers C1 are selected from the group consisting of ethylene glycol based monomers of general formula (X), and wherein the monomers C2 are selected from the group consisting of propylene glycol based monomers of general formula (XI), and wherein the molar ratio of the units derived from the group of monomers A to the units derived from the group of monomers B is from 9:1 to 1:2.4, and wherein the molar ratio of the units derived from the groups of monomers A and B to the units derived from the group of monomers C is from 1.3:1 to 1:1.3. The polyester of the invention is preferably cross-linked.
Abstract:
Cross-linked polyester derived from unsaturated polyester chains, which are inter-molecularly cross-linked and comprise units derived from unsaturated dicarboxylic acid based monomers and ethylene glycol based monomers.
Abstract:
Die vorliegende Erfindung betrifft die Verwendung einer wässrigen Dispersion wenigstens eines biologisch abbaubaren Polyesters in Form einer Beschichtung zur Verbesserung der Barriereeigenschaften von Verpackungsmaterialien aus Papier oder Karton, insbesondere von Verpackungsmaterialien aus recyceltem Papier oder Karton, gegenüber Mineralölen. Die vorliegende Erfindung betrifft auch ein Verfahren zur Herstellung von Barrierebeschichtungen auf Papier oder Karton, insbesondere auf recyceltem Papier oder Karton.
Abstract:
The present invention is directed to a process for preparing a porous material, at least comprising the steps of providing a gel comprising a solvent (S), wherein the solvent (S) has a volume (V1), pressurizing the gel with carbon dioxide at a temperature and a pressure at which carbon dioxide solubilizes in the solvent (S) forming gas-expanded liquid (EL), wherein the gas-expanded liquid (EL) has a volume (V2) and (V2) is greater than (V1); removing supernatant liquid, and drying the gel. The present invention further is directed to the porous material obtained or obtainable according to the process as such as well as the use of the porous material according to the invention in particular for medical, biomedical and pharmaceutical applications or for thermal insulation.
Abstract:
Die vorliegende Erfindung betrifft eine wässrige Polymerdispersion aliphatischer Polycarbonat-Polymere, ein Verfahren zu deren Herstellung und deren Verwendung in Beschichtungszusammensetzungen, insbesondere als Bindemittel in Papierstreichfarben, als Leimungsmittel für Papier, als Papierverfestigungsmittel, als Bindemittelzusammensetzungen für Vliesstoffe, in Klebstoffen,oder zur Formulierung von Wirkstoffen. Die erfindungsgemäße wässrige Polymerdispersion, enthält: i) 5 bis 50 Gew.-%, insbesondere 8 bis 40 Gew.-%, bezogen auf das Gesamtgewicht der Dispersion, wenigstens eines aliphatischen Polycarbonat-Polymeren, insbesondere Polypropylencarbonat; ii) 1 bis 20 Gew.-%, insbesondere 2 bis 15 Gew.-%, bezogen auf das Gesamtgewicht der Dispersion, wenigstens eines teil- oder vollverseiften Polyvinylalkohols; und iii) Wasser, wobei das Gewichtsverhältnis von aliphatischen Polycarbonat-Polymeren zu dem teil- oder vollverseiften Polyvinylalkohol im Bereich von 1 : 1 bis 20 : 1, insbesondere im Bereich von 1,2 : 1 bis 10 : 1 liegt.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung wässriger Dispersionen von thermoplastischen Polymeren, die eine Vielzahl von Estergruppen und/oder Carbonatgruppen im Polymerrückgrad aufweisen, die eine Säurezahl von weniger als 5 mg KOH/g insbesondere maximal 3 mg KOH/g besitzen und bei 180°C eine Nullscherviskosität η 0 (180°C) von wenigstens 60 Pa·s aufweisen. Die Erfindung betrifft auch die nach diesem Verfahren erhältlichen Polymerdispersionen und deren Verwendung.
Abstract:
Cross-linked polyester derived from unsaturated polyester chains, which are inter-molecularly cross-linked and comprise units derived from unsaturated dicarboxylic acid based monomers and ethylene glycol based monomers.
Abstract:
The present invention relates to a process for producing aqueous dispersions of thermoplastic polymers which have a multitude of ester groups and/or carbonate groups in the polymer backbone, and which have an acid number of less than 5 mg KOH/g, especially not more than 3 mg KOH/g, and a zero-shear viscosity η 0 (180°C) at 180°C of at least 60 Pa·s. The invention also relates to polymer dispersions obtainable by this process and to the use thereof.