Process for preparing reaction products of natural rubber or synthetic rubber-like materials with sulphur dioxide专利检索-..用含不止一个碳—碳双键的脂肪族化合物的聚合物专利检索查询-专利查询网

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Process for preparing reaction products of natural rubber or synthetic rubber-like materials with sulphur dioxide
申请号	GB2663247	申请日	1947-10-03	公开(公告)号	GB642959A	公开(公告)日	1950-09-13
申请人	RUBBER STICHTING;			发明人
摘要	Synthetic rubber-like materials as such, or in solution, are reacted with sulphur dioxide, using as catalysts oxides of nitrogen or compounds from which oxides of nitrogen are liberated under the reaction conditions. Specified oxides of nitrogen are nitric oxide, nitrogen dioxide, nitrogen trioxide. Specified compounds are metal or organic nitrates in the presence of acids, nitric acid, nitrolic acids such as methyl nitrolic acid, and nitrosylsulphuric acid or metal or organic nitriles, preferably in the presence of water. Specified rubber-like materials are polymers and copolymers made from one or more of the following monomers: butadiene, methyl- and dimethyl-butadienes, pentadiene, chlorobutadiene, isobutene, acetylene, vinyl halides, vinyl esters, styrene, pentene-4-one-2, acrylic and methacrylic acids, and acrolein. Optionally the reaction may be effected in the presence of vinyl chloride, styrene, propene and methyl propene. Specified solvents for the materials are benzene and chloroform. Softening agents, fillers and pigments may be added to the rubber-like materials before, during or after the reaction. The reaction may be effected concurrently with conversion into filaments, threads, films and bands of the rubber-like material by spinning a solution of the material containing the catalyst into a medium containing sulphur dioxide. Specification 572,574, [Group V], is referred to.ALSO:Natural rubber, e.g. gutta percha, balata, deproteinized crepe, as such or in solution are reacted with sulphur dioxide using as catalysts oxides of nitrogen are liberated under the reaction conditions. Specified oxides of nitrogen are nitric oxide, nitrogen dioxide, nitrogen trioxide. Specified compounds are metal or organic nitrates, in the presence of acids, nitric acid, nitrolic acids such as methyl nitrolic acid and nitroxylsulphuric acid or metal or organic nitrites, preferably in the presence of water. Specified solvents are benzene and chloroform. Optionally the reaction may be effected in the presence of vinyl chloride, styrene, propene and methyl propene. Softening agents, fillers and pigments may be added to the natural rubber before, during, or after the reaction. The reaction may take place simultaneously with conversion into filaments, threads, films and bands of the rubber, by spinning a solution of the rubber containing the catalyst into a medium containing sulphur dioxide. Specification 572,574 is referred to.
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