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公开(公告)号：US4944902A
公开(公告)日：1990-07-31
申请号：US456512
申请日：1989-12-26
申请人： Carroll W. Lanier , Raymond Lee
发明人： Carroll W. Lanier , Raymond Lee
CPC分类号： C08J9/02 , C08G73/1025 , C08G73/1042 , C08J2379/08 , Y10S521/915
摘要： A copolyimide foam comprising the reaction product of one or more of an aromatic tetracarboxylic acid and a compound of the formula: ##STR1## where x is an integer from 1 to 12 and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl a mixture thereof with two or more diamines at least one of which being a heterocyclic diamine having a nitrogen atom in the ring and the other being a para- or meta-substituted aromatic diamine free of aliphatic substitution.Processes for producing the above copolyimide foam are also disclosed.
摘要翻译： 一种共聚酰亚胺泡沫体，其包含一种或多种芳族四羧酸和下式化合物的反应产物：其中x是1至12的整数，并且R 1，R 2，R 3和R 4相同或不同， 是氢或C1-C6直链或支链烷基，其与两个或多个二胺的混合物，其中至少一种是环中具有氮原子的杂环二胺，另一种是不含脂族的对位或间位取代的芳族二胺 代换。 还公开了用于生产上述共聚酰亚胺泡沫的方法。
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公开(公告)号：US4897432A
公开(公告)日：1990-01-30
申请号：US248618
申请日：1988-09-26
CPC分类号： C08J9/10 , B29C44/321 , B29C44/3415 , C08J9/00 , B29C2035/0855 , B29K2079/00 , B29K2105/12 , B29K2105/16 , C08J2379/08 , Y10S521/915
摘要： Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next by use of improvements in microwave-based foaming processes. While a body of polyimide precursor is exposed to microwave radiation, the body of polyimide precursor and of the foam structure as it is developing therefrom are kept under a substantially vapor-impermeable microwave-compatible shroud that does not substantially restrict or impede development of the foam structure. For this purpose use may be made of a shroud composed of a polymer film. Mechanisms by which the shroud produces the improved results are discussed, and methods based thereon are set forth.
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公开(公告)号：US4804504A
公开(公告)日：1989-02-14
申请号：US208757
申请日：1988-06-20
CPC分类号： C08J9/10 , B29C44/321 , B29C44/3415 , B29C2035/0855 , B29K2079/00 , B29K2105/12 , B29K2105/16 , C08J2379/08 , Y10S521/915
摘要： Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next by use of improvements in microwave-based foaming processes. While a body of polyimide precursor is exposed to microwave radiation, the body of polyimide precursor and of the foam structure as it is developing therefrom are kept under a substantially vapor-impermeable microwave-compatible shroud that does not substantially restrict or impede development of the foam structure. For this purpose use may be made of a shroud composed of a polymer film. Mechanisms by which the shroud produces the improved results are discussed, and methods based thereon are set forth.
摘要翻译： 描述了通过使用基于微波的发泡方法的改进，通过一次运行到下一个步骤来提高规格级聚酰亚胺泡沫的产率的方法。 当聚酰亚胺前体体暴露于微波辐射时，聚酰亚胺前体和泡沫结构的主体正在从其形成，保持在基本上不透气的微波相容的护罩下，其基本上不限制或阻碍泡沫的发展 结构体。 为此，可以使用由聚合物膜构成的护罩。 讨论了护罩产生改进结果的机理，并阐述了基于此的方法。
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公开(公告)号：US5234966A
公开(公告)日：1993-08-10
申请号：US960239
申请日：1992-10-13
CPC分类号： C08J9/142 , C08G73/1032 , C08J9/125 , C08J2379/08
摘要： Polyimide foam of desired density is produced by adding to a polyimide precursor comprising carboxylic and diamine components at least one foam-enhancing polar, protic additive of the formula ROH, where R is hydrogen, or C.sub.1 to C.sub.12 linear or branched alkyl or cycloalkyl, unsubstituted or substituted with halo, aryl, alkoxy or hydroxy, and heating the resultant slurry to a temperature that does not exceed about 105.degree. C. to form a homogeneous melt. When heated to a higher temperature the melt foams and cures. The density of the foam is affected by the amount of foam-enhancing additive which is utilized.
摘要翻译： 通过向包含羧酸和二胺组分的聚酰亚胺前体中加入至少一种式ROH的促进泡沫的极性的质子性添加剂，其中R为氢或C1至C12的直链或支链烷基或环烷基，未取代的 或被卤素，芳基，烷氧基或羟基取代，并将所得浆液加热至不超过约105℃的温度以形成均匀的熔体。 当加热到更高的温度时，熔体发泡并固化。 泡沫的密度受所使用的增泡添加剂的量的影响。
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公开(公告)号：US5064867A
公开(公告)日：1991-11-12
申请号：US466096
申请日：1990-04-05
申请人： James R. Barringer , H. Eugene Broemmelsiek , Porter W. Gregory , Carroll W. Lanier , Raymond Lee , Harold E. Schulz
发明人： James R. Barringer , H. Eugene Broemmelsiek , Porter W. Gregory , Carroll W. Lanier , Raymond Lee , Harold E. Schulz
CPC分类号： C08J9/00 , B29C35/08 , B29C2035/0855 , B29K2105/04 , C08J2379/08
摘要： Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next, by use of improved microwave-based foaming processes. In one such process, prior to the application of the microwave radiation, the body of polyimide precursor is compressed at a pressure that will reduce the bulk volume of the precursor and heated to a temperature below that at which any substantial foaming occurs. to accomplish the foaming, one further embodiment of the invention employs microwave radiation directed upon the top, sides and ends of the body of above-treated polyimide precursor and of the foam structure as it is developing maintaining the developing foam under a substantially vapor-impermeable microwave compatible shroud. The extent to which the microwave radiation impinges upwardly into the bottom of said body and said foam structure is curtailed, preferably by means of a metallic shield located below the precursor and developing foam structure.
摘要翻译： 通过使用改进的基于微波的发泡方法，描述了通过一次运行到下一个步骤来提高规格级聚酰亚胺泡沫的产率的方法。 在一个这样的方法中，在施加微波辐射之前，聚酰亚胺前体的体积被压缩，其压力将降低前体的体积，并加热至低于发生任何实际发泡的温度。 为了实现发泡，本发明的另一个实施方案使用微波辐射，其指向上述处理的聚酰亚胺前体和泡沫结构体的顶部，侧面和端部，因为其在显影下保持显影泡沫基本上不透气 微波兼容护罩。 微波辐射向上撞击到所述主体和所述泡沫结构的底部的程度优选地通过位于前体和显影泡沫结构下方的金属屏蔽被限制。
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公开(公告)号：US4900762A
公开(公告)日：1990-02-13
申请号：US255264
申请日：1988-10-11
CPC分类号： C08J9/00 , B01J19/126 , C08J2379/08 , Y10S521/915
摘要： Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next, by use of improved microwave-based foaming processes. In one such process, the microwave radiation is directed upon the top, sides and ends of the body of polyimide precursor and of the foam structure as it is developing, but the extent to which such radiation impinges upwardly into the bottom of said body and said foam structure is curtailed, preferably by means of a metallic shield located below the precursor and developing foam structure. Mechanisms by which the shields function to provide the improvements of the process are discussed, and methods based thereon are set forth.
摘要翻译： 通过使用改进的基于微波的发泡方法，描述了通过一次运行到下一个步骤来提高规格级聚酰亚胺泡沫的产率的方法。 在一个这样的过程中，微波辐射被引导到聚酰亚胺前体和泡沫结构体的顶部，侧面和端部，因为它正在显影，但是这种辐射向上侵入所述主体的底部的程度和所述的 泡沫结构被减少，优选地通过位于前体和显影泡沫结构下面的金属屏蔽。 讨论了屏蔽功能提供过程改进的机制，并阐述了基于此的方法。
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公开(公告)号：US4877563A
公开(公告)日：1989-10-31
申请号：US251797
申请日：1988-10-03
CPC分类号： C08J9/00 , B01J19/126 , C08J2379/08 , Y10S521/915
摘要： Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next, by use of improved microwave-based foaming processes. In one such process, the microwave radiation is directed upon the top, sides and ends of the body of polyimide precursor and of the foam structure as it is developing, but the extent to which such radiation impinges upwardly into the bottom of said body and said foam structure is curtailed, preferably by means of a metallic shield located below the precursor and developing foam structure. Mechanisms by which the shields function to provide the improvements of the process are discussed, and methods based thereon are set forth.
摘要翻译： 通过使用改进的基于微波的发泡方法，描述了通过一次运行到下一个步骤来提高规格级聚酰亚胺泡沫的产率的方法。 在一个这样的过程中，微波辐射被引导到聚酰亚胺前体和泡沫结构体的顶部，侧面和端部，因为它正在显影，但是这种辐射向上侵入所述主体的底部的程度和所述的 泡沫结构被减少，优选地通过位于前体和显影泡沫结构下面的金属屏蔽。 讨论了屏蔽功能提供过程改进的机制，并阐述了基于此的方法。
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公开(公告)号：US4822537A
公开(公告)日：1989-04-18
申请号：US209018
申请日：1988-06-20
CPC分类号： C08J9/00 , B29C35/08 , B29C44/3415 , B29C33/06 , B29K2079/00 , C08J2379/08 , Y10S264/05 , Y10S521/915
摘要： Described are ways of improving the yields of specification grade polyimide on a consistent basis from one run to the next, by use of improved microwave-based foaming processes. In one such process, during the application of the microwave radiation, the body of polyimide precursor and of the foam structure as it is developing therefrom are maintained under a substantially vapor-impermeable microwave-compatible shroud that does not substantially restrict or impede development of the foam structure; and the microwave radiation is directed upon the top, sides and ends of the body of polyimide precursor and of the foam structure as it is developing, but the extent to which such radiation impinges upwardly into the bottom of said body and said foam structure is curtailed, preferably by means of a metallic shield located below the precursor and developing foam structure. Mechanism by which the shields and shrouds function to provide the improvements of the process are discussed, and methods based thereon are set forth.
摘要翻译： 描述的是通过使用改进的基于微波的发泡方法，在一个运行到下一个的一致的基础上提高了规格级聚酰亚胺的产率。 在一个这样的方法中，在施加微波辐射期间，将聚酰亚胺前体和泡沫结构体从其显影的本体保持在基本上不透气的微波相容的护罩下，其基本上不会限制或阻碍 泡沫结构; 并且微波辐射在聚酰亚胺前体和泡沫结构的主体的顶部，侧面和端部被引导时，它们正在显影，但是这种辐射向上侵入所述主体的底部和所述泡沫结构的程度被限制 ，优选地通过位于前体下方的金属屏蔽和显影泡沫结构。 讨论了屏蔽罩和护罩作用于提供过程改进的机理，并阐述了基于此的方法。
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公开(公告)号：US5096932A
公开(公告)日：1992-03-17
申请号：US575982
申请日：1990-08-31
CPC分类号： C08J9/142 , C08G73/1032 , C08J9/125 , C08J2379/08
摘要： Polyimide foam of desired density is produced by adding to a polyimide precursor comprising carboxylic and diamine components at least one foam-enhancing polar, protic additive of the formula ROH, where R is hydrogen, or C.sub.1 to C.sub.12 linear or branched alkyl or cycloalkyl, unsubstituted or substituted with halo, aryl, alkoxy or hydroxy, and heating the resultant slurry to a temperature that does not exceed about 105.degree. C. to form a homogeneous melt. When heated to a higher temperature the melt foams and cures. The density of the foam is affected by the amount of foam-enhancing additive which is utilized.
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公开(公告)号：US5077318A
公开(公告)日：1991-12-31
申请号：US719920
申请日：1991-06-24
CPC分类号： C08J9/142 , C08G73/1032 , C08J9/125 , C08J2379/08
摘要： Polyimide foam of desired density is produced by adding to a polyimide precursor comprising carboxylic and diamine components at least one foam-enhancing polar, protic additive of the formula ROH, where R is hydrogen, or C.sub.1 to C.sub.12 linear or branched alkyl or cycloalkyl, unsubstituted or substituted with halo, aryl, alkoxy or hydroxy, and heating the resultant slurry to a temperature that does not exceed about 105.degree. C. to form a homogeneous melt. When heated to a higher temperature the melt foams and cures. The density of the foam is affected by the amount of foam-enhancing additive which is utilized.
摘要翻译： 通过向包含羧酸和二胺组分的聚酰亚胺前体中加入至少一种式ROH的促进泡沫的极性的质子性添加剂，其中R为氢或C1至C12的直链或支链烷基或环烷基，未取代的 或被卤素，芳基，烷氧基或羟基取代，并将所得浆液加热至不超过约105℃的温度以形成均匀的熔体。 当加热到更高的温度时，熔体发泡并固化。 泡沫的密度受所使用的增泡添加剂的量的影响。
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