Patent application number | Description | Published |
20090209674 | RESIN COMPOSITION FOR STEREOLITHOGRAPHY - Provided is a resin composition for stereolithography that absorbs little water and moisture over time in uncured state, maintains a low moisture absorption rate even under high humidity, and has high curing sensitivity, from which a stereolithography product excellent in the properties, such as dimensional accuracy, mechanical properties, and dimensional stability can be smoothly produced for reduced light irradiation time. | 08-20-2009 |
20090306380 | Process for preparing 4-amino-2-alkylthio-5-pyrimidinecarbaldehyde - Provided are a process for preparing a 4-amino-2-alkylthio-5-pyrimidinecarbaldehyde, which is industrially advantageous in that a 4-amino-2-alkylthio-5-pyrimidinecarbaldehyde can be prepared in high yield in a simple way, an intermediate used in the process, and a process for preparing the intermediate, which is industrially advantageous in that the intermediate can be prepared safely in high yield with ease. | 12-10-2009 |
20100174098 | 3-ETHYLOXETHANE COMPOUND HAVING HYDROXYL GROUP AND METHOD FOR PRODUCING THE SAME - Disclosed is a 3-ethyloxethane compound having a hydroxyl group which is represented by the following general formula (1). (1) (In the formula, A represents an alkylene group having 3-5 carbon atoms which may have an ether bond or an alkylene group having 3-5 carbon atoms which may be substituted by a hydroxyl group.) The 3-ethyloxethane compound having a hydroxyl group can be produced by reacting a 3-ethyloxethane compound represented by the general formula (2) below, a diol compound represented by the general formula (3) below and a base. (2) (In the formula, X represents a leaving group.) (3) (In the formula, A is as defined above.) | 07-08-2010 |
Patent application number | Description | Published |
20100207293 | PROCESS OF PRODUCING POLYIMIDE FILM AND POLYAMIC ACID SOLUTION COMPOSITION - A process of producing a polyimide film including applying a polyamic acid solution composition to a substrate to form a coating layer and heating the coating layer, wherein the polyamic acid solution composition contains a mixed solvent system of at least two solvents selected from N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, and 1,3-dimethyl-2-imidazolidinone, each solvent being present in a proportion ranging from 7% to 93% based on the total mixed solvent system, and a polyamic acid composed mainly of s-BPDA and PPD. The process enables a film with a thickness exceeding 40 μm to be formed without involving bubble formation. | 08-19-2010 |
20100305295 | PROCESS FOR PRODUCING POLYAMIC ACID SOLUTION AND POLYAMIC ACID SOLUTION - Disclosed is a process for producing a polyamic acid solution by reacting a diamine component consisting essentially of 20 mol % to 80 mol % of p-phenylenediamine and 80 mol % to 20 mol % of diaminodiphenyl ether with a tetracarboxylic acid component consisting essentially of 10 mol % to 60 mol % of 2,3,3′,4′-biphenyltetracarboxylic dianhydride and 90 mol % to 40 mol % of 3,3′,4,4′-biphenyltetracarboxylic dianhydride in a solvent, comprising: | 12-02-2010 |
Patent application number | Description | Published |
20090236566 | CARBON BLACK-DISPERSED POLYAMIC ACID SOLUTION COMPOSITION, AND PROCESS FOR PRODUCING SEMICONDUCTIVE POLYIMIDE RESIN BELT THEREWITH - A carbon black-dispersed polyamic acid solution composition that utilizes carbon black excelling in safety and environmental adaptability and excels in the dispersion stability and fluidity of carbon black dispersed in polyamic acid solution, and that realizes high solid content and high carbon black content. Further, an intermediate transfer belt of polyimide, which produces a transfer image of high quality in a color image-forming apparatus, is provided with the use of the above polyamic acid solution composition. In particular, there is provided a carbon black-dispersed polyamic acid solution composition containing a polyamic acid solution obtained by reaction of approximately equimolar amounts of biphenyltetracarboxylic acid dianhydride and an aromatic diamine, and containing a carbon black of 2 to 6% volatile content produced by oil furnace process, wherein the solid content of the solution composition is 23 wt. % or more and wherein the carbon black content of the solid is in the range of 20 to 30 wt. %. | 09-24-2009 |
20100247888 | POLYAMIC ACID SOLUTION COMPOSITION HAVING CARBON BLACK DISPERSED THEREIN, PROCESS FOR PRODUCTION OF SEMICONDUCTIVE POLYIMIDE RESIN BELT USING THE COMPOSITION, AND SEMICONDUCTIVE POLYIMIDE RESIN BELT - The present invention provides a carbon black-dispersed polyamic acid solution composition having a high solids content and a high carbon black content. The invention further provides an intermediate transfer belt using the polyamic acid solution composition. The carbon black-dispersed polyamic acid solution composition is obtained by uniformly dispersing carbon black in a polyamic acid solution obtained by reacting biphenyltetracarboxylic dianhydride and an aromatic diamine in an organic polar solvent. The biphenyltetracarboxylic dianhydride includes 2,3,3′,4′-biphenyltetracarboxylic dianhydride and 3,3′,4,4′-biphenyltetracarboxylic dianhydride. The aromatic diamine includes 4,4′-diaminodiphenyl ether and p-phenylenediamine. The polyamic acid solution has a solids content of 25 weight % or more. | 09-30-2010 |