摘要:
A polyimide/metallic foil composite film having a curvature radius of at least 25 cm and which is substantially free from curling is described, comprising coating a solution of a polyimide precursor in an organic polar solvent on a 1 to 500 .mu.m thick metallic foil, the polyimide precursor being prepared by reacting a diamine component comprising p-phenylenediamine and an aromatic tetracarboxylic acid component comprising 3,3',4,4'-biphenyltetracarboxylic dianhydride or its derivative; heat-drying the above-prepared coating in the state that the metallic foil is fixed; and then heating it at a high temperature to form a 5 to 200 .mu.m thick polymide film. This composite film does not substantially curl in either the lengthwise and widthwise directions and is very suitable for use in the production of an electrical circuit board.
摘要:
A process for producing a polyimide/metallic foil composite film having a curvature radius of at least 25 cm and which is substantially free from curling is described, comprising coating a solution of a polyimide precursor in an organic polar solvent on a 1 to 500 .mu.m thick metallic foil, the polyimide precursor being prepared by reacting a diamine component comprising p-phenylenediamine and an aromatic tetracarboxylic acid component comprising 3,3',4,4'-biphenyltetracarboxylic dianhydride or its derivative; heat-drying the above-prepared coating in the state that the metallic foil is fixed; and then heating it at a high temperature to form a 5 to 200 .mu.m thick polyimide film. This composite film does not substantially curl in either the lengthwise and widthwise directions and is very suitable for use in the production of an electric circuit board.
摘要:
A polyimide powder which can provide a molding having excellent both strength and heat resistance by heat-press molding, and a method for producing such polyimide powder are disclosed. The polyimide powder comprises spherical polyimide particles having a particle size distribution of from 0.5 to 20 .mu.m and a mean particle diameter of from 1 to 15 .mu.m, and comprising a repeating unit represented by the formula ##STR1## wherein Ar represents an aromatic diamine residue.
摘要:
A laminate sheet that can be easily produced together with improving the heat resistance and the water absorbency. Provided is a laminate sheet prepared by laminating plural sheet materials by a resin composition, wherein the resin composition is comprised of an aromatic polyamide resin and an epoxy group-containing phenoxy resin having an epoxy group in the molecule, and the resin composition is a polyamide resin composition that contains 30 to 50% by mass of the epoxy group-containing phenoxy resin.
摘要:
A light-sensitive composition comprises (A) a polymer comprising structural units represented by the following general formula (I): ##STR1## (wherein R.sup.1 represents a hydrogen atom or a methyl group; R.sup.2 represents a hydrogen atom, an alkyl group or an aryl group; and Z represents a bivalent connecting group having at least 3 non-metallic atoms in the main chain); (B) a monomer or an oligomer having at least two polymerizable ethylenically unsaturatred double bonds; and (C) a photopolymerization initiator. The light-sensitive composition has high sensitivity and is excellent in stability of sensitivities such as storage stability, temperature dependency and latent image sensitization.
摘要翻译:光敏性组合物包含(A)包含由以下通式(I)表示的结构单元的聚合物:其中R 1表示氢原子或甲基; R 2表示氢原子,烷基 基团或芳基; Z表示在主链中具有至少3个非金属原子的二价连接基团); (B)具有至少两个可聚合烯属不饱和双键的单体或低聚物; 和(C)光聚合引发剂。 感光性组合物具有高灵敏度,并且在保存稳定性,温度依赖性和潜像敏化等敏感性的稳定性方面优异。
摘要:
A light-sensitive composition comprises a photo-crosslinkable polymer having a photo-dimerizable unsaturated bond and a sensitizer represented by the following general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group or a substituted or unsubstituted allyl group, provided that R.sub.1 and R.sub.2 may form a ring together with the carbon atoms to which they are attached; n represents 0, 1 or 2; and G.sub.1 and G.sub.2 each independently represents a hydrogen atom, a cyano group, a substituted or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted aryloxycarbonyl group, a substituted or unsubstituted acyl group, a substituted or unsubstituted arylcarbonyl group, an alkylthio group, an arylthio group, an alkylsulfonyl group, an arylsulfonyl group or a fluoroalkylsulfonyl group, provided that G.sub.1 and G.sub.2 do not represent a hydrogen atom simulataneously and that G.sub.1 and G.sub.2 may form a ring comprising a non-metallic atom and the carbon atoms to which they are attached. According to the present invention, the sensitivity of the light-sensitive composition is greatly improved by the use of the above sensitizer.
摘要:
The present invention relates to a porous membrane containing cellulose fibers, wherein the cellulose fibers contain 5% by weight or more of cellulose fibers with a diameter of 1 μm or more, relative to the total weight of the cellulose, and the porous membrane has a tensile strength of 50 N·m/g or more, and/or has a tear strength of 0.40 kN/m or more. The porous membrane according to the present invention can provide a separator for electrochemical devices with superior properties, at a reasonable cost.
摘要:
A light-sensitive composition which comprises at least one polymeric compound having both photocross-linkable groups and functional groups carrying P--OH bonds. The light-sensitive composition can effectively be employed for making lithographic printing plates, IC circuits and photomasks. The light-sensitive composition shows excellent practically acceptable developability with either of an aqueous alkali developer and an aqueous alkaline solution containing or free of organic substances such as organic solvents and/or surfacants. Moreover, when it is used to form PS plates, the resulting lithographic printing plates never cause background contamination and can provide a large number of good printed matters. The composition makes it possible to develop negative working PS plates with developers for positive working PS plates. Therefore, when both positive and negative working PS plates are processed, the use of the composition can save various troubles.
摘要:
A light-sensitive composition which comprises, (a) an ethylenically unsaturated addition polymerizable compound, (b) an alkaline water-soluble or swellable, and film-forming polymer, (c) a photopolymerization initiator, (d) a negative working diazo resin, and (e) at least one compound selected from the group consisting of a higher fatty acid and a higher fatty acid amide which are solid at ordinary temperatures.The light-sensitive composition is hardly influenced by oxygen and is suitable for a presensitized plate from which a printing plate is to be prepared.
摘要:
A presensitized plate for use in making a lithographic printing plate which comprises an aluminum substrate provided thereon with a light-sensitive layer comprising a polymer having at least two photodimerizable unsaturated double bonds in the molecule, wherein the light-sensitive layer further comprises a compound having at least one photodimerizable unsaturated double bond and at least one phosphinyl group in each molecule as well as a molecular weight of not more than 2,000. The presensitized plate shows excellent sensitivity and makes it possible to provide a lithographic printing plate showing high printing durability.