Patent GB-601783-A (GB)
Title: Improvements in production of wood pulp products
IPC: C08B1/08
Filed: 1945-10-20
Abstract: In order to suppress the formation of incrustations in the spinneret orifices and to improve the emulsification or dispersion of opacifying agents such as oils or pigments in cellulose spinning solutions, e.g. viscose, there is incorporated in the chemically prepared wood pulp used in the production of the solutions from 0.01 to 0.2 per cent of a mixed ether containing a polyalkylene oxide radical and an aryl hydrocarbon radicle substituted by at least one alkyl, acyl or cycloalkyl radical.  In addition to the mixed ether, a small amount of a cation-active amino compound such as a mixture of the mono- and diamides of triethylene triamine and coconut fatty acids or a reaction product consisting substantially of mixed diethylene triamine diamides from coconut fatty acids and a lower acid such as acetic, may also be added to the pulp.  The mixed ethers may be prepared by etherifying substituted phenols with polyalkenoxy glycols or with mixtures of ethylene and propylene oxides. Alternatively, the substituted phenol or the glycol ether thereof may be reacted with ethylene oxide in the presence of alkali as catalyst, the product being finally neutralised by acid and decolourized.  The alkyl-substituted phenols may be prepared by reacting the phenol, e.g., phenol, cresol, xylenol or naphthol with alcohols, alkyl halides, alkyl esters or an olefine such as diisobutylene or isododecylene or a mixture of olefines or alkyl compounds such as chlorinated kerosene fractions. Acyl-substituted phenols may be prepared by the Friedel-Crafts reaction.  Many alkyl, cycloalkyl and acyl phenols are specified examples of which are p.n-butyl phenol, p.tert. a a g g  tetramethyl butyl phenol, di- and tri-octyl phenol, amyl cresol, isopropyl naphthol; p.cyclohexyl phenol, bornyl phenol; butyryl, valeryl, dodecoyl and stearoyl phenol.  The Specification as open to inspection under Sect. 91 comprises also the incorporation of the mixed ethers in the spinning solution, e.g. viscose, instead of in the pulp.  This subject-matter does not appear in the Specification as accepted.ALSO:In order to suppress the formation of incrustations in the spinneret orifices and to improve the emulsification or dispersion of opacifying agents such as oils or pigments in cellulose spinning solutions, e.g. viscose, there is incorporated in the chemically prepared wood pulp used in the production of the solutions from 0.01 to 0.2 per cent of a mixed ether containing a polyalkylene oxide radical and an aryl hydrocarbon radicle substituted by at least one alkyl, acyl or cycloalkyl radical. The mixed ethers may be prepared by etherifying substituted phenols with polyalkenoxy glycols or with mixtures of ethylene and propylene oxides.  Alternatively, the substituted phenol or the glycol ether thereof may be reacted with ethylene oxide in the presence of alkali as catalyst, the product being finally neutralized by acid and decolourized.  The alkyl-substituted phenols may be prepared by reacting the phenol, e.g. phenol, cresol, xylenol or naphthol with alcohols, alkyl halides, alkyl esters or an olefine such as disobutylene or isododecylene or a mixture of olefines or alkyl compounds such as chlorinated kerosene fractions. Acyl-substituted phenols may be prepared by the Friedel-Crafts reaction.  Many alkyl, cycloalkyl and acyl phenols are specified, examples of which are p-n-butyl phenol, p-tert-a a b b -tetramethyl butyl phenol, di- and tri-octyl phenol, amyl cresol, isopropyl naphthol; p-cyclohexyl phenol, bornyl phenol; butyryl, valeryl, dodecoyl and stearoyl phenol.