摘要:
This invention relates to polyurethane foams capable of being welded by high frequency welding and a process for producing the same, characterized by the addition of certain ammonium salts of acids containing phosphorus to the starting components for the polyurethane foam in order that the polyurethane starting materials and the polyurethanes contain from 0.1 to 10%, by weight, of ammonium salts of phosphorus-containing acids. Phosphorus-containing ammonium salts which are available in the liquid form and completely soluble in polyols are particularly suitable with salts of phosphoric acid mono- and dibutyl esters, dialkyl phosphinic acids, alkyl phosphonic acids and alkyl phosphonic acid monomethyl esters being preferred. The addition of these acids significantly increases the dielectric loss factor of thermoplastic polyurethane foams and, therefore, also considerably increases their capacity for being welded by high frequency welding.
摘要:
The instant invention is directed to hexahydrotriazine carboxylates, a method for their preparation, and their use as catalysts in the production of polyisocyanurate plastics.
摘要:
A process is disclosed for producing polyurethane resins using novel catalysts selected from the group consisting of a process for the production of cellular or non-cellular polyurethane resins comprising reacting:(a) polyisocyanates; with(b) compounds having at least 2 isocyanate reactive hydrogen atoms; in the presence of(c) tertiary amines as catalysts; optionally with the addition of(d) blowing agents, stabilizers and other known additives; characterized in that the substances used as component (c) comprise compounds selected from the group consisting of ##STR1## and mixtures thereof in which formulae: the symbols R may be the same or different and represent straight or branched-chain alkyl groups having from 1 to 4 carbon atoms;the symbols n may be the same or different and represent 2 or 3;the symbols m may be the same or different and represent 2 or 3; andk represents an integer of from 1 to 5.The process may also be carried out in the presence of other tertiary amine catalysts, particularly compounds containing one tertiary nitrogen atom and at least one amide group.The novel catalysts of the invention function as age-resistors and light-protective agents.
摘要:
The invention relates to a novel type of electric inductance arrangement for a series of applications in the field of distance measurement, sensor-based detection of objects, and construction of induction machines. The novelty consists in the type of inductance arrangement of the receiver or transmitter coil, said arrangement being designed in the form of a ladder rung arrangement, wherein the ladder spars short-circuit the rungs. The sum of all the short-circuit currents is an indicator of what is occurring in the surroundings of the arrangement. This could be changing magnetic fields caused by transmitter objects or additional ladder-rung systems acting as transmitters. Multiple such sensors and transmitters can be designed in the ladder-rung form, said sensors and transmitters being connected in parallel or in series according to the application under certain circumstances and if necessary assuming the excitation function by moving a conductor through which a direct current is flowing or by applying alternating currents. The aforementioned inductance arrangement results positively in that the coils can all have a completely crossover-free design and are therefore substantially simpler to technically implement for very different applications in electrical engineering. The applicability ranges from short-range distance measuring devices and long-range object location to light detection and efficient induction machines with large or also very small constructions.
摘要:
Systems and associated methods for highly parallel processing of parameterized simulations are described. Embodiments permit processing of stochastic data-intensive simulations in a highly parallel fashion in order to distribute the intensive workload. Embodiments utilize methods of seeding records in a database with a source of pseudo-random numbers, such as a compressed seed for a pseudo-random number generator, such that seeded records may be processed independently in a highly parallel fashion. Thus, embodiments provide systems and associated methods facilitating quicker data-intensive simulation by enabling highly parallel asynchronous simulations.
摘要:
An assembly to attach a belt buckle (12) to a vehicle, especially to a vehicle body part (16), has an attachment fitting (14) which is fixed in place directly at the belt buckle (12), is made in one piece, and is movable together with the belt buckle (12), the attachment fitting (14) being adapted to assume an initial position, an attachment member (22) and a spring member (28) which urges the attachment fitting (14) that is movable relative to the vehicle into the initial position. The attachment member (22) fixes the attachment fitting (14) in place directly at the vehicle body part (16).
摘要:
Foamed, lightfast polyurethane reaction mixtures, and moldings produced therefrom, comprising: (a) an isocyanate component comprising one or more selected from the group consisting of aliphatic isocyanates, aliphatic isocyanate prepolymers and mixtures thereof; (b) a polyol component having an average molecular weight of 1,000-15,000 g/mol and an average functionality of 2 to 8; (c) a chain extension/crosslinking component comprising one or more selected from the group consisting of polyols and polyamines having a molecular weight of 62-500 g/mol and a functionality of 2 to 8; and (e) a blowing agent comprising an ammonium carbamate salt of formula (I) having at least two OH groups: HO—X—N(R1)H2+−O—C(O)—N(R1)—X—OH (I) wherein each R1 independently represents a moiety selected from the group consisting of H, C1-C5 alkyl radicals, and —X—OH groups; wherein each X independently represents a moiety selected from the group consisting of —[CR2R3]n— wherein n represents a number of 2 to 6, —(CR2R3)pO—(—CR2R3p]q— wherein p represents a number of 2 to 4 and q represents a number of 1 to 10, and —(CR2R3)N(R4)CR2R3r]s— wherein r represents a number of 2 to 4 and s represents a number of 1 to 10; wherein each R2 and each R3 independently represents a moiety selected from the group consisting of H and C1-C5 alkyl radicals; and wherein each R4 independently represents a moiety selected from the group consisting of H, C1-C5 alkyl radicals, and —X—OH groups.
摘要翻译:发泡,耐光聚氨酯反应混合物和由其制备的模制品,包括:(a)异氰酸酯组分,其包含选自脂族异氰酸酯,脂族异氰酸酯预聚物及其混合物中的一种或多种; (b)平均分子量为1,000-15,000g / mol且平均官能度为2至8的多元醇组分; (c)包含选自分子量为62-500g / mol和官能度为2至8的多元醇和多胺的一种或多种的一种或多种链延伸/交联组分; 和(e)包含具有至少两个OH基团的式(I)的氨基甲酸铵盐的发泡剂:<?in-line-formula description =“In-line Formulas”end =“lead”?> HO-XN( R 1)H 2 + -OC(O)-N(R 1)-X-OH(I)<β在线公式描述=“在线式”末端=“尾”→其中每个R 1独立地表示选定的部分 由H,C 1 -C 5烷基和-X-OH基组成的组; 其中每个X独立地表示选自以下的部分: - [CR 2 R 3] n - 其中n表示2至6的数, - (CR 2 R 3)p H 10 - ( - CR 2 R 3),其中p表示数 2〜4,q表示1〜10的数, - (CR 2 R 3)N(R 4)CR 2 R 3的碳原子数,其中,r表示2〜4的数,s表示1〜10的数。 其中每个R 2和每个R 3独立地表示选自H和C 1 -C 5烷基的部分;并且其中每个R 4独立地表示选自H,C 1 -C 5烷基和-X- OH组。
摘要:
The present invention relates to PIPA polyols, to a process for the preparation of these PIPA polyols, and to a process for the production of highly elastic flexible polyurethane foams from these PIPA polyols.
摘要:
An assembly to attach a belt buckle (12) to a vehicle, especially to a vehicle body part (16), has an attachment fitting (14) which is fixed in place directly at the belt buckle (12), is made in one piece, and is movable together with the belt buckle (12), the attachment fitting (14) being adapted to assume an initial position, an attachment member (22) and a spring member (28) which urges the attachment fitting (14) that is movable relative to the vehicle into the initial position. The attachment member (22) fixes the attachment fitting (14) in place directly at the vehicle body part (16).
摘要:
The invention provides composite elements containing a thermoplastic polymer layer, adhering to a layer comprising the reaction product of a reaction mixture containing a prepolymer containing isocyanate groups produced by the reaction of at least one isocyanate and one polycarbonate polyalcohol with a functionality of 2 to 3 and a hydroxyl number of about 40 to about 400 mg KOH/g, based on the condensation of carbonates with diols and/or triols with a molecular weight of about 62 to about 3000 g/mol, the prepolymer having an isocyanate group content of about 5 to about 48%, compounds reactive with respect to isocyanates and optionally catalysts blowing agents and/or auxiliary substances and/or additives. The present invention further provides a process for the production the composite elements.