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3. 发明专利

GB679040A Improvements in and relating to the manufacture of artificial threads, fibres, filaments and the like 未知
公开(公告)号：GB679040A
公开(公告)日：1952-09-10
申请号：GB669850
申请日：1950-03-17
申请人： COURTAULDS LTD
发明人： CARPENTER ALBERT STANLEY , WALLSGROVE ERIC RICHARD , WILLIAMS HAROLD MALCOLM GORDON
IPC分类号： D01F6/24
摘要： Artificial threads are obtained by extruding a solution of a polydiene such as polybutadiene or polychloroprene or a copolymer of butadiene or chloroprene with styrene or acrylonitrile, containing a hydroperoxide as catalyst into a coagulant bath containing sulphur dioxide wherein the coagulant bath contains at least 5 per cent by weight of the solvent used to dissolve the polydiene. The solvents for the polydiene may be aromatic hydrocarbons such as benzene, toluene, xylene and cumene, and chlorinated hydrocarbons such as trichloroethylene, carbon tetrachloride, chloroform and chlorobenzene. The preferred solvents for the sulphur dioxide are mixtures of the above hydrocarbons with methanol, ethanol, a propanol or acetone. The spinning solution may contain at least 10 per cent of the polydiene as claimed in Specification 679,274, and may contain small proportions of methanol or isopropanol to reduce viscosity and is activated by a hydroperoxide such as tetralin hydroperoxide or tertiary butyl hydroperoxide. Specifications 527,075 and 616,276 also are referred to.

4. 发明专利

GB693980A Process for preparing linear polyethers 未知
公开(公告)号：GB693980A
公开(公告)日：1953-07-08
申请号：GB1950650
申请日：1950-08-04
申请人： COURTAULDS LTD
发明人： REEDER FRANK , WALLSGROVE ERIC RICHARD
IPC分类号： C08G65/40
摘要： Linear polyethers having a recurrent unit [Ar-O-R-O], where Ar is an arylene group and R is a divalent linkage group, are made by reacting substantially equimolecular proportions of a dihydric phenol and a disulphonic ester of a diol in presence of an alkali the molecular proportion of which is at least twice the molecular proportion of the disulphonic ester. Specified dihydric phenols are resorcinol, hydroquinone and 3,31- or 4, 41-dihydroxydiphenyl. Specified disulphonic esters are the di-paratoluene sulphonates of ethylene glycol; 1 : 4-bis - (beta - hydroxyethoxy) - benzene; propane - 1,3 - diol; butane - 1,4 - diol; pentane-1,5 - diol; hexane - 1,6 - diol; decane - 1,10-diol; and diethylene glycol. Reaction may be performed in presence of a mixture of dioxane and water. The polymers may be purified by washing with boiling water and boiling hydrochloric acid. They are soluble in meta-cresol and nitrobenzene. Examples are given. Specification 433,452 is referred to.

6. 发明专利

GB679274A Improvements in and relating to the manufacture of artificial threads, fibres, filaments and the like 未知
公开(公告)号：GB679274A
公开(公告)日：1952-09-17
申请号：GB669950
申请日：1950-03-17
申请人： COURTAULDS LTD
发明人： CARPENTER ALBERT STANLEY , HAMPSON HENRY , WALLSGROVE ERIC RICHARD
IPC分类号： D01F6/24
摘要： Artificial threads are produced by extruding a solution of a polydiene such as polybutadiene or polychloroprene or a copolymer of butadiene or chloroprene with styrene or acrylonitrile, containing a catalyst into a coagulant bath containing sulphur dioxide, the polydiene solution having a concentration of at least 10 per cent by weight, and preferably 20 to 40 per cent. The solvents and coagulant baths may be the same, or those described in Specification 679,040. The viscosity of the polydiene solution may be reduced by passing a stream of ozonized oxygen p through it. Specifications 527,075 and 616,276 also are referred to.

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