Abstract: The present invention relates to a method for producing flexible polyurethane foams based on polyoxymethylene-polyoxyalkylene block copolymers. The invention also relates to the use of the flexible polyurethane foams thus produced and their use for producing furniture upholstery, textile inlays, mattresses, automobile seats, headrests, armrests, sponges, foam sheets for use in automobile parts such as roof linings, door panel upholstery, seat covers and technical components. The invention finally relates to a two-component system for producing flexible polyurethane foams.

Abstract: The present invention relates to open- and fine-celled rigid polyurethane foams which contain not only urethane groups (PUR) but also isocyanurate groups (PIR) and carbodiimide groups (CD) and to the use thereof in vacuum insulation panels.

Abstract: The present invention relates to a quality inspection method for polyurethane samples, an electronic nose device and a storage medium. The quality inspection method for a polyurethane sample comprises the following steps: comparing measured spectrum information of a polyurethane sample to be inspected to reference spectrum information of a plurality of inspected polyurethane samples to determine the reference spectrum information with a predetermined confidence interval to which the measured spectrum information conforms, wherein each of the reference spectrum information is associated with property information of corresponding inspected polyurethane samples; and obtaining a quality inspection result of the polyurethane sample to be inspected on the basis of the property information associated with the determined reference spectrum information.

Abstract: The invention relates to a method for producing methylene-diphenylene-diisocyanate and optionally a mixture of methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, wherein, in a step ?), a fraction (142) containing a methylene-diphenylene-diisocyanate and secondary components is provided, optionally via a step ?.1), the separating of methylene-diphenylene-diisocyanate and secondary components from a fraction (100) containing methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, and wherein, in a step ?), the fraction (142) containing methylene-diphenylene-diisocyanate and secondary components is subjected to a purification comprising an isomer separation by distillation and/or crystallization in two or more sub-steps (a, b, . . . ), obtaining two or more methylene-diphenylene-diisocyanate-reinfractions (140-1, 140-2, . . .

Abstract: The present invention relates to an aqueous composition comprising cells of at least one strain of a halophilic microorganism, and alkali sulfate in a concentration of at least 30 g/l based on the total volume of the aqueous composition. The present invention further relates to a method for treating a waste water, comprising obtaining or providing a waste water, contacting said waste water with cells of at least one strain of a halophilic microorganism, and thereby generating an aqueous composition comprising alkali sulfate in a concentration of at least 30 g/l, and incubating said aqueous composition under conditions which allow for the treatment of the waste water.

Abstract: The invention relates to a method for producing polyurethane foams by reacting the following components A a polyol component containing A1 40 to 100 parts by weight of polyether carbonate polyol with a hydroxyl number according to DIN 53240-1 June 2013 of 20 mg KOH/g to 120 mg KOH/g, A2 0 to 60 parts by weight of polyether polyol with a hydroxyl number according to DIN 53240-1 June 2013 of 20 mg KOH/g to 250 mg KOH/g and an ethylene oxide content of 0 to 60 wt. %, wherein polyether polyol A2 is free from carbonate units, B B1 a catalyst and B2 optionally auxiliary and additional materials, C water and/or physical blowing agents with D di- and/or polyisocyanates, wherein the production occurs at a characteristic value of 90 to 120, characterised in that the component A contains a component A5 of 0.05 to 10.00 parts by weight of polyester polyol, in relation to the sum of the parts by weight of the components A1+A2=100 parts by weight, said polyester polyol containing units derived from malonic acid.

Abstract: The invention relates to a method for the preparation of di- and polyamines of the diphenylmethane series, care being taken during the shutdown of the production process that an excess of aniline and respect to formalin is ensured.