摘要:
An assembly of an article and a polyimide composition is prepared. The assembly resists dimensional change, delamination, or debonding when exposed to changes in temperature. An article is provided. A polyamic acid solution which yields a polyimide having a low coefficient of thermal expansion (CTE) was prepared. Equimolar quantities of an aromatic diamine and an aromatic dianhydride were reacted in a solvent medium to form a polyamic acid solution. A metal ion-containing additive was added to the solution. Examples of this additive are: TbCl.sub.3, DyCl.sub.3, ErCl.sub.3, TmCl.sub.3, Al(C.sub.5 H.sub.7 O.sub.2).sub.3, and Er.sub.2 S.sub.3. The polyamic acid solution was imidized and is combined with the article to form the assembly.
摘要翻译:制备制品和聚酰亚胺组合物的组合物。 当暴露于温度变化时,组件抵抗尺寸变化,分层或剥离。 提供了一篇文章。 制备具有低热膨胀系数(CTE)的聚酰亚胺的聚酰胺酸溶液。 将等摩尔量的芳族二胺和芳族二酐在溶剂介质中反应形成聚酰胺酸溶液。 向溶液中加入含金属离子的添加剂。 该添加剂的实例是:TbCl 3,DyCl 3,ErCl 3,TmCl 3,Al(C 5 H 7 O 2)3和Er 2 S 3。 将聚酰胺酸溶液酰亚胺化并与制品组合以形成组件。
摘要:
Linear aromatic polyimides with low dielectric constants are produced by adding a diamic acid additive to the polyamic acid resin formed by the condensation of an aromatic dianhydride with an aromatic diamine. The resulting modified polyimide is a better electrical insulator than state-of-the-art commercially available polyimides.
摘要:
Self-metallizing polyimide films are created by doping polyamic acid solutions with metallic ions and solubilizing agents. Upon creating a film, the film is exposed to coherent light for a specific time and then cured. The resulting film has been found to have a metallic surface layer and a metallic subsurface layer (interlayer). The layer separating the metallic layer has a uniform dispersion of small metal particulates within the polymer. The layer below the interlayer has larger metal particulates uniformly distributed within the polymer. By varying the intensity or time of exposure to the coherent light, three-dimensional control of metal formation within the film is provided.
摘要:
This invention relates generally to poly(aryl ether ketones) bearing alkylated side chains. It relates particularly to soluble, thermally stable, low dielectric poly(aryl ether ketones) with alkylated side chains and especially to films and coatings thereof. These poly(aryl ether ketones) have the following structural formula: wherein Y is selected from the group consisting of CF3 and CH3; and wherein R is CnH(2n+1) and n=11-18.
摘要:
A product and the process for preparing the same to improve the moisture resistance properties of epoxidized TGMDA and DGEBA resin systems by chemically incorporating chromium (III) ions therein without impairing the mechanical strength properties of the resins.
摘要:
A resin product useful as an adhesive, composite or casting resin and the process for preparing same to improve the flexural strength mechanical property characteristics thereof. This improved flexural strength is attained with little or no change in density, thermal stability or moisture resistance by chemically incorporating 1.2 to 10.6% by weight Co(III) ions in an epoxidized resin system.
摘要:
An adhesive composition comprising Components A, B and C as follows:A. a polymerizable monomeric allyl 2-cyanoacrylate containing portion comprising1. from about 75 to about 92 parts by weight of allyl 2-cyanoacrylate;2. from about 1 to about 12 parts by weight of a difunctional monomer diester of an acid from the group consisting of acrylic and methacrylic acid and an aromatic diol; and3. from about 3 to 20 parts by weight of a thickening agent selected from poly(methylacrylate-coacrylonitrile) polymers;B. from 0.1 to 3.0 weight percent based upon the weight of component A of a hydrophobic cyclic imino initiator selected from 2,4,6-tri(allyloxy)-S-triazine, tri(alkyloxy)-S-triazines having 1 to about 20 exocyclic carbon atoms, benzoxazole and substituted benzoxazoles; andC. an amount of an organic peroxide free radical providing compound sufficient to cause cross linking of the difunctional monomer diester with the allyl 2-cyanoacrylate.
摘要:
An electrically conductive, thermooxidatively stable poltimide, especially a film thereof, is prepared from an intimate admixture of a particular polyimide and gold (III) ions, in an amount sufficient to provide between 17 and 21 percent by weight of gold (III) ions, based on the weight of electrically conductive, thermooxidatively stable polyimide. The particular polyimide is prepared from a polyamic acid which has been synthesized from a dianhydride/diamine combination selected from the group consisting of 3,3',4,4'-benzophenonetetracarboxylic dianhydride and 2,2-bis[4-(4 -aminophenoxy)phenyl]hexafluoropropane; 3,3',4,4'-benzophenonetetracarboxylic dianhydride and 4,4'-oxydianiline; 2,2'-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride and 4,4'-oxydianiline; and 3,3'4,4'-benzophenonetetracarboxylic dianhydride and 2,2-bis(3-aminophenyl)hexafluoropropane.
摘要:
An assembly of an article and a polyimide is prepared. The assembly resists dimensional change, delamination, or debonding when exposed to changes in temperature. An article is provided. A soluble polyimide resin solution having a low coefficient of thermal expansion (CTE) was prepared by dissolving the polyimide in solvent and adding a metal ion-containing additive to the solution. Examples of this additive are: Ho(OOCCH.sub.3).sub.3, Er(NPPA).sub.3, TmCl.sub.3, and Er(C.sub.5 H.sub.7 O.sub.2).sub.3. The soluble polyimide resin is combined with the article to form the assembly.
摘要翻译:制备制品和聚酰亚胺的组件。 当暴露于温度变化时,组件抵抗尺寸变化,分层或剥离。 提供了一篇文章。 通过将聚酰亚胺溶解在溶液中并向溶液中加入含金属离子的添加剂,制备热膨胀系数(CTE)的可溶性聚酰亚胺树脂溶液。 这种添加剂的实例是:Ho(OOCCH 3)3,Er(NPPA)3,TmCl 3和Er(C 5 H 7 O 2)3。 可溶性聚酰亚胺树脂与制品组合以形成组件。
摘要:
An adhesive composition comprising Components A, B and C as follows:A. a polymerizable monomeric 2-cyanoacrylate containing portion comprising1. from 60 to 90 parts by weight of allyl 2-cyanoacrylate;2. from 3 to 25 parts by weight of an alkyl 2-cyanoacrylate having the formula ##STR1## wherein R is alkyl having 60 to 10 carbon atoms; 3. FROM 0.25 TO 5 PARTS BY WEIGHT OF A DIFUNCTIONAL MONOMER DIESTER OF AN ACID FROM THE GROUP CONSISTING OF ACRYLIC AND METHACRYLIC ACID AND AN AROMATIC DIOL; AND4. from 3 to 15 parts by weight of a 2-cyanoacrylate compatible polymeric thickener;B. from 0.05 to about 1.5 weight percent based upon the weight of component A of a cyclic imino initiator selected from 2,4,6-tri(allyloxy)-S-triazine, 2,4,6-tri(alkyloxy)-S-triazines having 1 to about 20 exocyclic carbon atoms, benzoxazole and substituted benzoxazoles; andC. an amount of an organic peroxide free radical providing compound sufficient to cause crosslinking of a difunctional monomer diester with the 2-cyanoacrylates.