摘要:
The invention is directed to a process for the production of molded articles by deep-drawing a prefabricated polyurethane(urea) part produced from a polyisocyanate polyaddition product having a specific gravity of at least 0.8 g/cm.sup.3. The part is placed inside a deep-drawing mold and pressed at a temperature of up to 230.degree. C. and a pressure of up to 1,000 bar. After the deep-drawing process, the part is subjected to a dwell time of at least 10 seconds at a temperature of up to 230.degree. C. and a pressure of up to 1,000 and is immediately thereafter removed from the mold.
摘要翻译:本发明涉及通过深冲压由比重至少为0.8g / cm 3的多异氰酸酯加聚产物制成的预制聚氨酯(尿素)部分来生产模制品的方法。 将该部件放置在深拉模具内并在高达230℃的温度和高达1,000巴的压力下压制。 在深拉伸工艺之后,该部件在高达230℃的温度和至多1000的压力下进行至少10秒的停留时间,并立即从模具中取出。
摘要:
The invention relates to a process for the preparation of single-layered or multilayered molded articles from particles of polyisocyanate-polyaddition products by shaping a specified mixtures under heat and pressure. The mixture contains quasi-thermoplastic particles of polyisocyanate-polyaddition products and one or more processing aids.
摘要:
The present invention relates to a process for the preparation of moldings or films based on polyisocyanate polyadducts comprising thermoplastically molding, at a temperature of at least 50.degree. C. and at a pressure of at least 5 bar, polyisocyanate polyadducts obtained by reacting in closed molds using the reaction injection molding technique aromatic polyisocyanates; compounds having a molecular weight of from 1800 to 12,000 and containing on a statistical average at least 2.5 isocyanate-reactive groups; and one or more components selected from a diamine containing two primary and/or secondary aromatically bound amino groups and and an aliphatic or cycloaliphatic polyol or polyamine; with the provisos that the quantity of isocyanate-reactive compound is at least 30% by weight based on the total quantity of the components and that at least one of the diamine, polyol, or polyamine components comprises at least 5% by weight based on the weight of the isocyanate-reactive compound.
摘要:
The present invention is directed to a process of thermoplastically molding a specific foam composition. The composition is formed by reacting an isocyanate and a relatively low molecular weight tri or higher polyol in the presence of a blowing agent.
摘要:
Composite structures are produced by placing at least two flat, thermoplastically formable plastic materials one above the other and thermoplasticially molding the materials under sufficient conditions of temperature and pressure that molding is accompanied by intimate union of individual layers of the structure. At least one of the plastic materials is based on a polyisocyanate polyaddition product having a density of at least 0.8 g/cm.sup.3 and is prepared by reacting:a) an aromatic polyisocyanate,b) a compound having a molecular weight of about 1800 to 12,000 and containing an average of at least 2.5 isocyanate reactive groups,c) optionally a diamine having a molecular weight of from 108 to 400 and containing two primary and/or secondary aromatically bound amino groups, andd) optionally an aliphatic or cycloaliphatic polyol and/or an aliphatic or cycloaliphatic polyamine having a molecular weight of from 60 to 1799 and which may contain ether groups,at an isocyanate index of from about 60 to 140. The total combined amount of components c) and d) is at least 5% by weight, based on the weight of component b).
摘要翻译:通过在足够的温度和压力条件下放置至少两个平坦的,热塑性可成形的塑料材料一个在另一个之上并热塑性地模制材料来生产复合结构,该模塑伴随着结构的各个层的紧密结合。 至少一种塑料材料是基于密度为至少0.8g / cm 3的多异氰酸酯加聚产物,其通过以下方法制备:a)芳族多异氰酸酯,b)分子量为约1800至12,000的化合物和 含有至少2.5个异氰酸酯反应性基团的平均值,c)任选分子量为108-400的二胺,并含有两个伯和/或二次芳香结合的氨基,和d)任选的脂族或脂环族多元醇和/或 分子量为60至1799的脂族或脂环族多胺,其可含有醚基,异氰酸酯指数为约60至140.组分c)和d)的总组合量为至少5重量% ,基于组分b)的重量。
摘要:
The present invention is directed to composite structures by thermoplastically shaping an assembly of at least two flat thermoplastically formable plastic materials placed in layers one above the other and optionally at least one upper, lower and/or intermediate layer containing a reinforcing or filler material under such conditions of temperature and pressure that shaping is accompanied by intimate union of the individual layers of the assembly, characterized in that at least one of the flat plastic materials is based on a polyisocyanate polyaddition product having a density of at least 0.8 g/cm.sup.3 which has been prepared by the reaction of(a) aromatic polyisocyanates,(b) compounds having a molecular weight of 1800 to about 12000 and containing a statistical average of at least 2.5 isocyanate-reactive groups, optionally(c) diamines in the molecular weight range of 108 to 400 containing two primary and/or secondary aromatically bound amino groups, and optionally(d) (cyclo)alkanepolyols and/or (cyclo)alkanepolyamines in the molecular weight range of 60 to 1799 optionally containing ether groups,by a single stage or multi-stage process at an isocyanate index of 60 to 140, wherein at least one of components (c) or (d) is used in a quantity such that the total quantity of components (c) and (d) is at least 5% by weight, based on the weight of component (b).
摘要翻译:本发明涉及复合结构,其通过将至少两个平坦的可塑成形塑料材料的组件热塑成形,一个层叠在另一层之上,以及任选地至少一层含有增强或填充材料的上,下和/或中间层 温度和压力的条件是成形伴随着组件的各个层的紧密结合,其特征在于,所述扁平塑料材料中的至少一种基于密度为至少0.8g / cm 3的多异氰酸酯加聚产物,其具有 通过(a)芳族多异氰酸酯的反应制备,(b)分子量为1800至约12000的化合物,并且含有至少2.5个异氰酸酯反应性基团的统计平均值,任选(c)分子量范围内的二胺 108至400,其含有两个伯和/或二次芳香结合的氨基,以及任选的(d)(环)烷撑多糖 通过在异氰酸酯指数为60至140的单级或多级方法,任选地含有醚基的分子量范围为60至1799的(环)链烷多胺和/或(环)链烷多胺,其中至少一种组分(c)或 (d)的使用量使得组分(c)和(d)的总量基于组分(b)的重量为至少5重量%。
摘要:
The present invention is directed to a process for the production of moldings from plastic forming materials in metal molds comprising coating at least a portion of the internal walls of the mold with an external mold release agent, introducing the plastic forming material into the mold, closing the mold, and removing the product from the mold, the improvement wherein the external mold release agent comprises one or more organic compounds the molecules of contain on a statistical average A) from 0.5 to 1.2 polar groups selected from the group consisting of --CN, --NC, --NCO, --CNO, --OCN, --SCN and --NCS and B) at least one non-polar hydrocarbon chain with at least 12 carbon atoms, which chain may be at least partially fluorinated, and which may be interrupted by heteroatoms and/or carbonyl groups.
摘要:
The present invention relates to a process for preparing solid, microcellular or expanded plastic molded items, characterized in that said molded items are produced in molds in which the internal surfaces consist of steel with the percentage composition:a) Fe: having a wt % greater than 0 wt % and less than 100 wt %;b) at least one element selected from the group consisting of W, Mo, or V, wherein if W is selected, W is present from a range greater than 0 wt % to 40 wt %; wherein if Mo is selected, Mo is present from a range greater than 0 wt % to 12 wt %; and if V is selected, V is present from a range greater than 0 wt % to 5 wt %;c) at least one element selected from the group consisting of Cr, Al, wherein if Cr is selected, Cr is present in a concentration of greater than 0 wt % to 15 wt %; and if Al is selected, Al is present in a concentration of greater than 0 wt % to 15 wt %;d) optionally, carbon at a concentration ranging from 0.1 to 1.5 wt %;e) optionally, cobalt at a concentration ranging from 0.1 to 10 wt %; andf) optionally, nitrogen in a nitriding layer at a concentration ranging from greater than 0 wt % to 10 wt %.
摘要:
Liquid polyamine crosslinking agent formulations based on trimerized toluylene 2,4- and/or 2,6-diisocyanate, with formation of an isocyanurate structure and hydrolysis of the isocyanate groups to amine groups, are described. The novel crosslinking agent formulations have a content of 40 to 80% of the total weight of the solids content of the crosslinking agent formulation of 1,3,5-tris-(3-amino-4-methyl-phenyl,2-methyl-3-aminophenyl) isocyanurate (I) which is not further condensed, and a content of not more than 1.0% of the total weight of the crosslinking agent formulations of toluylene-2,4- and/or -2,6-diamine (III). For the preparation, toluylene diisocyanate is trimerized, to form the isocyanurate structure, until 10 to 25% of the NCO groups have been reacted. The toluylene diisocyanate which has not undergone condensation is then distilled off, the bottom product formed by this operation is taken up directly in a solvent A and the 30 to 70% strength by weight solution formed by this procedure is metered into a hydrolysis in water/N,N-dialkyl-carboxylic acid amide in the presence of a catalytic amount of a basic catalyst. After the hydrolysis, the crosslinking agent formulations are brought to a solids content of 35 to 60% of the total weight of the formulation by distilling off a portion of the solvents and adding a solvent B.
摘要:
The present invention relates to N,N'-bis-(4-isocyanatocyclohexyl)urea obtained from the reaction with water of cyclohexane-1,4-diisocyanate having a high trans isomer content. This invention further relates to the process for preparing the N,N'-bis(4-isocyanatocyclohexyl)urea and to its use in the synthesis of polyurethanes.