摘要:
The present invention provides a method for providing a muscle relaxant, wherein said muscle relaxant is a reconstituted solution comprising the neurotoxic component of botulinum toxin free of complexing proteins, which exhibits at least one of the following characteristics, more preferably all characteristics a) to d): a. Stable at storage temperatures above 20° C. b. Stable in the presence of preservatives and/or analgesics c. Resistant against “freeze and thaw”-cycles d. Stable if stored in containers of different material.
摘要:
Sheet-like reinforced materials consisting ofA. a core layer comprising a sheet-like textile structure, preferably a glass fiber mat,B. a plastic matrix composed of a nylon which has been polymerized under alkaline conditions and penetrates both the core layer and the surface layer of layers,are produced batchwise by the RIM method or continuously on a double-belt press by impregnating the sheet-line textile structure and the foam sheets with a lactam melt and polymerizing the latter. The reinforced material can be used for the production of finished articles having a satisfactory surface, for example for the automotive or aircraft industry.
摘要:
The invention relates to urea group-containing polyisocyanate mixtures which are liquid at room temperature and have an isocyanate group content of from 15 to 30 weight percent and a diphenylmethane diisocyanate content of from 55 to 90 weight percent, obtained through the reaction of(A) polyoxyalkylene polyamines having a functionality of from 2 to 5 and an amine number from 20 to 250 with a polyisocyanate (B) selected from the group consisting of(B1) a mixture of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates having a diphenylmethane diisocyanate content of from 55 to 90 weight percent or(B2) at least one diphenylmethane diisocyanate isomer.The polyisocyanate mixtures claimed in the invention are used to prepare dense or cellular polyurethane and/or polyisocyanurate plastics, in particular, flexible polyurethane foams.
摘要:
The invention relates to a one-shot process for the preparation of cellular or noncellular polyurethane polyurea parts having a modulus of flexural elasticity greater than 600 N/mm.sup.2 and densities of from 0.8 to 1.2 g/cm.sup.3 using the reaction injection molding technique, by reacting organic polyisocyanates, a polyol component, aromatic diamines, additional chain extenders and/or cross-linking agents in the presence of catalysts and optionally blowing agents, auxiliaries and/or additives, wherein the polyol component is a mixture containing(i) from 95 to 60 percent by weight of at least one compound selected from the group consisting of polyols, polyether polyamines, polyesteramides, and their mixtures having functionalities of from 2 to 6 and a molecular weight of from 1000 to 8000 and(ii) from 5 to 40 percent by weight of a least one aromatic and/or aromatic-aliphatic polyester polyol having a functionality of from 2 to 3 and a molecular weight of from 254 to 700, wherein the percents by weight are based on the total weight of the polyol component.
摘要:
The invention relates to storage-stable tris(hydroxyalkyl)isocyanurate polyol dispersions containing(a) from 2 to 70 parts by weight tris(hydroxyalkyl)isocyanurate,(b) from 98 to 30 parts by weight of at least one polyol having a functionality of from 2 to 8 and a hydroxyl number from 20 to 1800, and(c) from 0 to 20 parts by weight of one or more dispersion stabilizers.The dispersions are prepared by dissolving starting components A and B at temperatures in excess of 100.degree. C., in some cases adding a dispersion stabilizer and/or crystallization accelerator, with continuous and step-wise cooling of the mixture while stirring. The products are utilized for the preparation of polyurethane plastics, in particular polyisocyanurate foams containing polyurethane or polyurethane groups.
摘要:
A process for purifying crude polyether polyols which are prepared by anionic polymerization of alkylene oxides in the presence of basic catalysts. The polyols are mixed with water and ortho-phosphoric acid in certain quantity ratios, an adsorption agent is incorporated in the reaction mixture, the mixture is filtered and the water is removed from the polyether polyol by distillation.
摘要:
Self-adhesive coatings are produced on sheet materials in a simple and particularly trouble-free manner by applying to said materials mixtures of1. acrylic ester copolymers containing polymerized units of unsaturated carboxylic acids or hydroxyl-containing vinyl monomers in addition to polymerized units of higher alkyl acrylates,2. melamine/formaldehyde resins and, optionally,3. solvents for components (1) and (2),And evaporating off any solvents.