Abstract:
Dispersions comprising functionalized metal oxide particles, polymerizable compounds and optionally a solvent, and the use thereof for stabilizing polymers.
Abstract:
The invention provides a thermoplastic polyurethane having at least one plasticizer, with at least one first plasticizer (i) being based on a glycerol, and at least one hydroxyl group of the glycerol being esterified with a monocarboxylic acid (ii) which contains 1, 2, 3, 4, 5 or 6 carbon atoms, more preferably 2, 3 or 4 carbon atoms and very preferably 2 carbon atoms. The invention further encompasses a process for preparing the thermoplastic polyurethane having the plasticizer (i), a method for coating products with this thermoplastic polyurethane, the use of the thermoplastic polyurethane, and the use of plasticizers based on glycerol for thermoplastic polyurethane.
Abstract:
The invention relates to a process for preparing polyesterols from at least one base polyesterol and at least one further reagent, wherein (a) the at least one base polyesterol and the at least one further reagent are mixed, (b) the mixture produced in (a) flows through a reactor in which at least one packing comprising at least one immobilized enzyme on a support is present, with the at least one base polyesterol and the at least one further reagent being reacted to form the polyesterol.
Abstract:
Thermoplastic polyurethane (I) having a hardness of 50-80 Shore-A, where the polyurethane are based on polyester diols, where polyester diols (a) are based on butane-1,4-diol and at least one additional diol with at least five carbon atoms, and polyester diols (b) are based on butane-1,4-diol and at least one additional diol with two or three carbon atoms, is new. Independent claims are included for: (1) the preparation of (I); and (2) a thermoplastic polyurethane obtained by the process.
Abstract:
Thermoplastic polyurethane (I) having a hardness of 50-80 Shore-A, where the polyurethane are based on polyester diols, where polyester diols (a) are based on butane-1,4-diol and at least one additional diol with at least five carbon atoms, and polyester diols (b) are based on butane-1,4-diol and at least one additional diol with two or three carbon atoms, is new. Independent claims are included for: (1) the preparation of (I); and (2) a thermoplastic polyurethane obtained by the process.
Abstract:
The present invention relates to a method for producing polyurethane foams with a density of 30 g/dm3 to 70 g/dm3, in which (a) aromatic polyisocyanate is mixed with (b) polymer compounds with groups reactive to isocyanates, (c) optionally chain elongation and/or cross-linking agents, (d) a catalyst, (e) propellant, containing water, (f) 0.1 to 5 wt. pcnt lactam, in relation to the total weight of the components (a) to (f), and (g) optionally additives, at an isocyanate index of 50 to 95, to form a reaction mixture; the reaction mixture reacts to form polyurethane foam, the catalyst contains metal catalyst and amine catalyst, and the amine catalyst comprises tertiary nitrogen atoms and is used in sufficient quantity that the tertiary nitrogen atom content in the amine catalyst, in relation to the weight of the starting components (a) to (e), amounts to between 0.0001 and 0.003 mol /100 g of foam. The present invention further relates to a polyurethane foam which may be obtained by a method of this kind, and the use of a soft polyurethane foam of this kind for producing pillows, seat cushions and mattresses.
Abstract:
Método para la preparación de poliesteroles, que son diferentes de al menos un poliesterol base, a partir de el poliesterol base, al menos uno, y al menos otro reactivo, en cuyo caso el otro reactivo es un poliesterol, un poliol, un ácido orgánico o un oligómero o un polímero con al menos un residuo hidroxilo o de ácido carboxílico y el método se realiza continuamente y en el cual (a) se mezclan el poliesterol base, al menos uno, y el reactivo, al menos otro, (b) la mezcla generada en (a) fluye a través de un reactor, en cuyo caso en el reactor está contenido al menos un paquete con al menos una enzima inmovilizada en un soporte, en cuyo caso el poliesterol base, al menos uno, y el reactivo, al menos otro, se convierten en poliesterol mediante una reacción de esterificación catalizada enzimáticamente, en cuyo caso en el paquete que contiene la enzima inmovilizada la proporción de la sección transversal de flujo libre, respecto de la sección transversal del empaque se encuentra en el rango de 10 a 80 %.
Abstract:
The present invention relates to a method for producing polyurethane foams with a density of 30 g/dm3 to 70 g/dm3, in which (a) aromatic polyisocyanate is mixed with (b) polymer compounds with groups reactive to isocyanates, (c) optionally chain elongation and/or cross-linking agents, (d) a catalyst, (e) propellant, containing water, (f) 0.1 to 5 wt.% lactam, in relation to the total weight of the components (a) to (f), and (g) optionally additives, at an isocyanate index of 50 to 95, to form a reaction mixture; the reaction mixture reacts to form polyurethane foam, the catalyst contains metal catalyst and amine catalyst, and the amine catalyst comprises tertiary nitrogen atoms and is used in sufficient quantity that the tertiary nitrogen atom content in the amine catalyst, in relation to the weight of the starting components (a) to (e), amounts to between 0.0001 and 0.003 mol /100 g of foam. The present invention further relates to a polyurethane foam which may be obtained by a method of this kind, and the use of a soft polyurethane foam of this kind for producing pillows, seat cushions and mattresses.