摘要:
Die Erfindung betrifft Polykondensationsprodukte, hergestellt durch Umsetzung von Bisphenol-Rückständen mit einem Aldehyd in saurem Medium. Die Produkte eignen sich insbesondere zur Herstellung von feuerfesten Formkörpern, von ungeformten Massen, die im Feuerfestbereich eingesetzt werden sowie zusammen mit Pulverlackrückständen als Bindemittel oder Bindemittelkomponenten zur Herstellung von Faservlies-Formteilen.
摘要:
The present invention provides a method for producing a film forming, fractionated novolak resin having consistent molecular weight and reduced polydispersity, by isolating such novolak resin fractions in a continuous fractionation and separation method using a liquid/liquid centrifuge, thereby reducing processing time and isolation steps which can cause undesirable changes in the novolak resin. A method is also provided for producing photoresist composition from such a fractionated novolak resin and for producing semiconductor devices using such a photoresist composition.
摘要:
A process for producing a water insoluble, aqueous alkali soluble, film forming novolak resin having low metal ions, made by the fractionation of a phenol formaldehyde condensation product, a process for producing a resin, a photoresist composition of superior quality containing such novolak resin, and a method for producing a semiconductor device using such photoresist composition.
摘要:
A photosensitive resin composition for color filters, which comprises a novolak resin containing repeating units represented by general formula (I) and having a molecular weight of about 1,000 to 50,000, a solvent, and a dye or pigment, and which is excellent in various performances including resolution, heat resistance and transparency. In formula (I) R1 through R5 represent each hydrogen, alkyl, etc.; and R6 and R7 represent each hydrogen, alkyl, etc., provided that the alpha group is located at the o- or p-position with respect to the OH group.
摘要:
Das erfindungsgemäße Bindemittelsystem besteht aus einem Resol mit einem freien Aldehydgehalt von maximal 0,3 % und einem Salz einer Verbindung, die mit Aldehyd reagieren kann. Das System ist lagerstabil und härtet bei Erwärmung innerhalb kurzer Zeit.
摘要:
A phenol resin is produced by reacting phenolic compounds, preferably compounds based on bisphenol, in particular bis(hydroxyphenyl)alkane, with formaldehyde and/or a formaldehyde-splitting compound in the presence of a catalyst. The ratio of the total number of reactive sites (A) in the phenol resin to the total number of sites (B) in the phenol resin to which formaldehyde is added, to the total number of sites (C) in the phenol resin in which two molecules of the phenolic compounds are condensed with each other through a methylene group, is as follows: (A):(B):(C)=1:(0.85 to 1.0):(less than or equal to 0.05, in particular less than or equal to 0.02). The phenol resin is produced in a relatively short reaction time of not more than 15 minutes.
摘要:
A suspension of a phenolic resin containing residual phenols is treated by adding a peroxidase enzyme and a peroxide material or an oxidase enzyme and an oxygen material to the suspension to polymerize residual phenolic monomer.
摘要:
A method for preparing branched novolak polymers possessing excellent lithographic performance is provided. The method involves the acid catalyzed reaction of a tris- or tetrakis(dialkylaminoalkyl) phenol or bisphenol with one or more phenol having at least one unsubstituted ortho- or para- ring position. The branched novolaks are soluble in aqueous base and organic solvent solutions and are particularly useful as the polyeric component of either positive-acting or negative-acting photoresist compositions.