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公开(公告)号：SE324240C
公开(公告)日：1974-01-17
申请号：SE1431165
申请日：1965-11-05
Applicant: HOECHST AG
Inventor： WEISSERMEL K , KUELLMAR K , REIHER M , FISCHER E
Abstract: A polyoxymethylene of high molecular weight is prepared by polymerizing trioxane by bulk polymerization in the absence of an inert solvent and in the presence of a cationic catalyst. Specified catalysts are borontrifluoride, stannic chloride, antimony pentachloride, methyl aluminium dichloride, methyl tin trichloride, an organo-aluminium or organo-tin compound in combination with an alpha-halogenated ether, saline compounds of halides of boron, iron, tin and antimony (but not antimony fluoride) where an aryldiazonium-fluoroborate is the preferred saline compound, an aryldiazonium salts. The catalyst may be diluted with an inert medium.
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Patent Agency Ranking
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公开(公告)号：SE320505B
公开(公告)日：1970-02-09
申请号：SE1431265
申请日：1965-11-05
Applicant: HOECHST AG
Inventor： WEISSERMEL K , FISCHER E , KUELLMAR K , REIHER M
Abstract: A polyoxymethylene of high molecular weight is prepared by polymerizing trioxane by bulk polymerization in the absence of an inert solvent and in the presence of a cationic catalyst. Specified catalysts are borontrifluoride, stannic chloride, antimony pentachloride, methyl aluminium dichloride, methyl tin trichloride, an organo-aluminium or organo-tin compound in combination with an alpha-halogenated ether, saline compounds of halides of boron, iron, tin and antimony (but not antimony fluoride) where an aryldiazonium-fluoroborate is the preferred saline compound, an aryldiazonium salts. The catalyst may be diluted with an inert medium.
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公开(公告)号：SE324455B
公开(公告)日：1970-06-01
申请号：SE1429369
申请日：1969-10-17
Applicant: HOECHST AG
Inventor： WEISSERMEL K , KUELLMAR K , REIHER M , FISCHER E
Abstract: A polyoxymethylene of high molecular weight is prepared by polymerizing trioxane by bulk polymerization in the absence of an inert solvent and in the presence of a cationic catalyst. Specified catalysts are borontrifluoride, stannic chloride, antimony pentachloride, methyl aluminium dichloride, methyl tin trichloride, an organo-aluminium or organo-tin compound in combination with an alpha-halogenated ether, saline compounds of halides of boron, iron, tin and antimony (but not antimony fluoride) where an aryldiazonium-fluoroborate is the preferred saline compound, an aryldiazonium salts. The catalyst may be diluted with an inert medium.
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公开(公告)号：SE324240B
公开(公告)日：1970-05-25
申请号：SE1431165
申请日：1965-11-05
Applicant: HOECHST AG
Inventor： WEISSERMEL K , KUELLMAR K , REIHER M , FISCHER E
Abstract: A polyoxymethylene of high molecular weight is prepared by polymerizing trioxane by bulk polymerization in the absence of an inert solvent and in the presence of a cationic catalyst. Specified catalysts are borontrifluoride, stannic chloride, antimony pentachloride, methyl aluminium dichloride, methyl tin trichloride, an organo-aluminium or organo-tin compound in combination with an alpha-halogenated ether, saline compounds of halides of boron, iron, tin and antimony (but not antimony fluoride) where an aryldiazonium-fluoroborate is the preferred saline compound, an aryldiazonium salts. The catalyst may be diluted with an inert medium.
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公开(公告)号：SE316580B
公开(公告)日：1969-10-27
申请号：SE649165
申请日：1965-05-18
Applicant: BUDERUS EDELSTAHLWERKE AG , HOECHST AG
Abstract: 1,083,524. Casting processes; mould linings. FARBWERKE HOECHST A.G. and EDELSTAHLWERKE BUDERUS A.G. May 20, 1965 [May 21, 1964], No. 21399/65. Heading B3F. To deposit carbon between melt and mould so that a smooth-surfaced ingot is obtained when chill casting, a granular chlorine-containing synthetic resin and/or a granular chlorinecontaining paraffin is added to the melt before or during casting or both. The added material may be polyvinyl chloride, a co-polymer of vinyl chloride, e.g. with vinyl acetate, polyvinylidene chloride, chlorinated polyolefin or mixtures of these. Polyvinyl chloride mixed with chlorinated polyethylene may be used. The material may be mixed withup to four times its weight of a fluoride flux such as fluorspar.
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