摘要:
The invention relates to pre-impregnating agents for high-resistant and elastic composite fibres having 50-85 mass % textile surface components and 15-50 mass % polyaminotriazine ether containing carbamide acid ester groups. The invention also relates to methods for making the pre-impregnating agents. The pre-impregnating agents can be used for heat-protecting cloths, flameproof covers, electric insulating papers, construction parts and for vehicle equipment.
摘要:
Compositions for producing aminoplast products by means of melt processing consisting of: A) 95 to 99.9% by mass of solvent-free meltable polycondensates of melamine resins having molar masses ranging from 300 to 300 000; A) from 0.1 to 5% by mass of weak acids serving as thermoinducible curing agents consisting of: acidifiers of the blocked sulfonic acid type; aliphatic C4-C18 carboxylic acids; aromatic C7-C18 carboxylic acids; alkali salts or ammonium salts of phosphoric acid; C1-C12-alkyl esters or C2-C8-hydroxyalkyl esters of C7-C14 aromatic carboxylic acids or of inorganic acids; salts of melamine or of guanamines having C1-18 aliphatic carboxylic acids; anhydrides, half-esters or half-amides of C4-C20 dicarboxylic acids; half-esters or half-amides of copolymers consisting of ethylenically unsaturated C4-C20 dicarboxylic acid anhydrides and ethylenically unsaturated monomers of the C2-C20 olefin type and/or C8-C20 vinyl aromatic compounds; and/or salts of C1-C12-alkyl amines or alkanolamines having C1-C18 aliphatic, C7-C14 aromatic or alkylaromatic carboxylic acids and inorganic acids of the hydrochloric acid, sulphuric acid or phosphoric acid type, and; B) optionally up to 400% by mass of fillers and or reinforcing fibers, up to 30% by mass of additional reactive polymers of the ethylene copolymer, maleic anhyudride copolymer, modified maleic anhydride copolymer, poly(meth)acrylate, polyamide, polyester and/or polyurethane type, and up to 4% by mass, each time with regard to the polycondensates of melamine resins, of stabilizes, UV absorbers and/or auxiliary agents. These inventive compositions can be processed by means of melt processing into products such as panels, coated supporting materials, profiled pieces, pipes, injection-molded articles, fibrous products and laminates.
摘要:
The invention relates to a method for producing at least one compound having at least one at least monosubstituted amino group. According to the invention, a starting substance having at least one amino group is reacted with an alcohol in a reaction mixture in the presence of ammonia.
摘要:
Determining the structure of permanent charge for an ion channel formulates an abstract operator, describing ion channel parameters, comprising equations that are ill-posed. The model of ion channel behavior relates the function of the ion channel to the structure of permanent charge within the ion channel and concentrations ions around the ion channel under certain properties and boundary conditions. The model also includes regularization of the abstract operator by approximating the ill-posed equations with a family of well-posed equations. An estimate of the closeness of the well-posed solution to the ill-posed solution is provided. Providing stable and convergent algorithms allows the model to determine a stability for the regularized solution, so that a regularization parameter can determine a balance between the stability and accuracy of the solution.
摘要:
Tidal modulators are described by which the tidal flow may be started, stopped, or regulated by movable parts that open, shut, or partially obstruct one or more passageways to modulate the tidal flow so as to enhance capturing its energy.
摘要:
A module conveying device including a main conveying mechanism conveying products in a main conveying direction between an input location and an output location of the main conveying mechanism. The output location can be swiveled between two vertically arranged first transfer positions. A transverse mechanism accepts the conveyed products that likewise includes an input location and an output location, which input location is positioned in one of the two first transfer positions and the output location of the transverse conveying mechanism is positioned in a second transfer position. The output location of the main conveying mechanism can be swiveled between at least one additional first transfer position and the two first transfer positions. Each additional first transfer position is positioned in the event of one input location of an additional transverse conveying mechanism. The additional output locations of the additional transverse conveying mechanism are positioned in additional transfer positions arranged vertically to the second transfer position. The conveying device also includes a collecting conveying mechanism, including an input location and an output location, that can be positioned selectively between the transfer positions of the transverse conveying mechanism to accept products temporarily stored on a transverse conveying mechanism.
摘要:
The invention relates to a method for producing at least one compound having at least one at least monosubstituted amino group. According to the invention, a starting substance having at least one amino group is reacted with an alcohol in a reaction mixture in the presence of ammonia.
摘要:
The invention relates to a laminate, the top layer thereof comprising a paper impregnated with an aminoplast resin and surface modified silica nanoparticles. According to the invention the surface modified silica nanoparticles comprise at least one silane on the surfaces thereof, said silane carrying at least one functional group. The invention further relates to a method for the production of a laminate of said type.