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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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公开(公告)号：SE344956B
公开(公告)日：1972-05-08
申请号：SE842265
申请日：1965-06-24
Applicant: HOECHST AG
Abstract: Copolymers of trioxane and at least one cyclic ether selected from 1,4-butene diol formal, 1,4-butane diglycidyl ether and cyclic ethers of formula in which both R1 groups are the same and each of R1, R2 and R3 represents a hydrogen atom, an alkyl group having 1 or 2 carbon atoms, a halogen-substituted alkyl group having 1 or 2 carbon atoms, and in which R4 is a methylene, oxymethylene, alkyl-substituted methylene, halogen-alkyl-substituted methylene, alkyl substituted oxymethylene or a halogen-substituted oxymethylene group, each halogen-alkyl or alkyl group having one or two carbon atoms, n being 0, 1, 2 or 3, or R4 is -CH2-CH2-O-CH2 or -OCH2-CH2-OCH2- n being 1, are treated at 100 DEG C. to 160 DEG C. with an aqueous solution having a pH of 10 to 10.5 containing a buffer system comprising 0.05 to 1 part of an amine, 0.25 to 2 parts of a compound of formula where x is oxygen and y is NH2 or x and y together are and 0.1 to 1 part of a weak organic or inorganic acid, the first dissociation constant of which is Acids specified are formic, acetic, oxalic, barbituric, phthalic, carbonic and boric acids.
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公开(公告)号：SE322912B
公开(公告)日：1970-04-20
申请号：SE937966
申请日：1966-07-08
Applicant: HOECHST AG
Abstract: Novel copolymers comprising 80 to 98% by weight of trioxan, 0 to 10% by weight of a cyclic ether or cyclic formal, and 0.1 to 10% by weight of a bisalkane triol-triformal of the formula in which n and m are integers of 3 to 9, are prepared by copolymerizing the monomers in the presence of a cationic catalyst, and at -50 DEG to + 100 DEG C. Specified triformals are bis-1,2,5-pentane triol triformal and bis-1,2,6-hexane-triol triformal. Specified cyclic ethers and formals are ethylene and propylene oxide, epichlorohydrin, 4-chloromethyldioxolan, glycol formal, and diglycol formal. Specified catalysts are organic and inorganic acids and acid halides, and Lewis acids, e.g. BF3, BF3-etherate, and diazonium fluoroborates. Heat, light and oxidation stabilizers may be incorporated into the copolymers.
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Patent Agency Ranking
公开(公告)号：SE318411B
公开(公告)日：1969-12-08
申请号：SE275866
申请日：1966-03-02
Applicant: HOECHST AG
Abstract: Copolymers comprise 97.9-88% by weight of trioxane, 2 to 10% by weight of a cyclice ether, and 0.1 to 2% by weight of an alkyl-glycidyl-formal. They are prepared using a cationic catalyst and a temperature range of -50 DEG C. to + 100 DEG C. Specified cyclic ethers are ethylene and propylene oxides, epichlorhydrin, glycol- and diglycol-formal, and 4-chloromethyl dioxolane. Suitable catalysts are inorganic and organic acids, acid halides, and Lewis Acids e.g. BF3 etherates, and diazonium fluoroborates. The polymerization may be in bulk, in solution, or in suspension. The catalysts may be inactivated after polymerisation using e.g. ammonia or a methanolic solution of an aromatic amine. The copolymers may be stabilized against heat by using e.g. polyamides, amides of polybasic carboxylic acids, amidines, and ureas, against oxidation by using e.g. phenols and aromatic amines, and against light by using e.g. a -hydroxybenzophenone derivatives. The copolymers may be formed into foils, films, or fibres, and may also be ground and comminuted.
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公开(公告)号：NO117658B
公开(公告)日：1969-09-08
申请号：NO16196166
申请日：1966-03-04
Applicant: HOECHST AG
Abstract: Copolymers comprise 97.9-88% by weight of trioxane, 2 to 10% by weight of a cyclice ether, and 0.1 to 2% by weight of an alkyl-glycidyl-formal. They are prepared using a cationic catalyst and a temperature range of -50 DEG C. to + 100 DEG C. Specified cyclic ethers are ethylene and propylene oxides, epichlorhydrin, glycol- and diglycol-formal, and 4-chloromethyl dioxolane. Suitable catalysts are inorganic and organic acids, acid halides, and Lewis Acids e.g. BF3 etherates, and diazonium fluoroborates. The polymerization may be in bulk, in solution, or in suspension. The catalysts may be inactivated after polymerisation using e.g. ammonia or a methanolic solution of an aromatic amine. The copolymers may be stabilized against heat by using e.g. polyamides, amides of polybasic carboxylic acids, amidines, and ureas, against oxidation by using e.g. phenols and aromatic amines, and against light by using e.g. a -hydroxybenzophenone derivatives. The copolymers may be formed into foils, films, or fibres, and may also be ground and comminuted.
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公开(公告)号：ZA802805B
公开(公告)日：1981-06-24
申请号：ZA802805
申请日：1980-05-09
Applicant: HOECHST AG
Inventor： FISCHER E , WEINLICH J , BRANDRUP J
IPC: C08F14/00 , C07D265/24 , C07D265/38 , C08F2/00 , C08F14/06 , C23F15/00 , C07D
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公开(公告)号：ZA792947B
公开(公告)日：1980-07-30
申请号：ZA792947
申请日：1979-06-14
Applicant: HOECHST AG
Inventor： MAYER G , FISCHER E , STRAMETZ H
Abstract: During the recovery of the unreacted propylene from the mother liquor obtained in the polymerization of liquid propylene, the major part of the propylene is evaporated in a first evaporation step at a low temperature and the remaining part is evaporated in a second evaporator at a high temperature. In this way an early agglomerization of the atactic and/or low-molecular weight polymer dissolved in the mother liquor and fouling of the heat exchanger tubes and/or of the column trays is avoided.
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公开(公告)号：DK139524C
公开(公告)日：1979-08-20
申请号：DK128273
申请日：1973-03-08
Applicant: HOECHST AG
IPC: C09K3/00 , B01J45/00 , C02F5/10 , C02F101/10 , C08F8/44 , C08F220/00 , C08F220/04 , C11D3/00 , C11D3/37 , C08F8/12 , C08F120/04
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