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    • 3. 发明授权
    • Process for producing aliphatically N-substituted maleimides
    • 生产脂肪族N-取代马来酰亚胺的方法
    • US4229351A
    • 1980-10-21
    • US24847
    • 1979-03-28
    • Jurg KieferTheobald Haug
    • Jurg KieferTheobald Haug
    • C07D207/44C07D207/448C07D207/452
    • C07D207/448C07D207/452
    • In the production of maleimides of the general formula I ##STR1## in which n is one of the numbers 1, 2 or 3, R.sup.1 and R.sup.2 are each a hydrogen atom or methyl, and A is an n-valent aliphatic, cycloaliphatic, aliphatic-cycloaliphatic or aliphatic-aromatic radical having up to 30 C atoms, by means of cyclising dehydration of a maleamic acid of the formula II ##STR2## in which the acid amide group (s) is (are) attached to aliphatic or cycloaliphatic C atoms, in the presence of low-molecular dehydrating carboxylic anhydrides in an organic solvent and in the present of catalysts, there is advantageously used as solvent a polar aprotic solvent containing at least one N-lower-alkyl-substituted acid amide group in the molecule, or a solvent mixture containing an aprotic solvent of this type, and as catalyst a metal compound, and the cyclising dehydration is performed in the temperature range of 40.degree. to 100.degree. C.
    • 在制备其中n为数字1,2或3之一的通式I(I)的马来酰亚胺中,R 1和R 2各自为氢原子或甲基,A为n价脂肪族基, 具有至多30个C原子的脂环族脂肪族脂环族脂肪族或脂肪族 - 芳族基团,通过使其中连接有酰胺基团的式II的马来酰胺酸(II)的环化脱水 在脂族或脂环族C原子的存在下,在有机溶剂中和在催化剂的存在下,在低分子脱水羧酸酐存在下,有利地使用含有至少一个N-低级烷基取代的酸的极性非质子溶剂 酰胺基,或含有这种非质子溶剂的溶剂混合物,作为金属化合物的催化剂,环化脱水在40℃〜100℃的温度范围内进行。
    • 5. 发明授权
    • Heat-curable mixtures based on polyimides and
poly-.beta.-iminocrotononitriles
    • 基于聚酰亚胺和聚-β-亚胺基腈的热固化混合物
    • US4247672A
    • 1981-01-27
    • US58223
    • 1979-07-16
    • Theobald HaugJurg Kiefer
    • Theobald HaugJurg Kiefer
    • C08F20/00C08F20/52C08F26/00C08G73/12C08F22/40
    • C08G73/12
    • Heat-curable mixtures which are stable on storage and consist of (a) poly-imides of specific unsaturated dicarboxylic acids of the general formula I ##STR1## in which A is a x-valent organic radical having at least 2 and not more than 30 carbon atoms, Z is a radical of the formulae ##STR2## and x is the number 2 or 3, and (b) poly-(.beta.-iminocrotononitriles) of the formula II, III and/or IV ##STR3## in which Y is a m-valent organic radical having at least 2 and at most 30 carbon atoms, R' is a hydrogen atom or an alkyl having 1 to 6 carbon atoms, cycloalkyl having 5 or 6 carbon atoms or aryl having 6 to 10 carbon atoms, R is an aliphatic or aromatic radical having not more than 30 carbon atoms, E, together with the two nitrogen atoms, is a five-membered or six-membered ring, m is 2 or 3 and n is 1 or 2, are suitable for the production of moulded materials, preferably by casting the resin mixture or by laminating or bonding substrates.
    • 在存储时稳定的由以下组成的可热固化的混合物:(a)通式I 的特定不饱和二羧酸的聚酰亚胺,其中A是具有至少2并且不大于30的x价有机基团 碳原子,Z是式“IMAGE”的基团,x是数字2或3,和(b)式II,III和/或IV的多 - (β-亚氨基加成蒙尼酮) IMAGE>其中Y是具有至少2个且至多30个碳原子的m价有机基团,R'是氢原子或具有1至6个碳原子的烷基,具有5或6个碳原子的环烷基或具有6个 至10个碳原子,R为不大于30个碳原子的脂族或芳族基团,E与两个氮原子一起为五元或六元环,m为2或3,n为1或 2,适用于模制材料的生产,优选通过浇铸树脂混合物或通过层压或粘结基材。