Process for the preparation of reaction products of polybutadiene and sulphur dioxide and the products so produced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 the preparation of reaction products of polybutadiene and sulphur dioxide and the products so produced
申请号	GB477950	申请日	1950-02-24	公开(公告)号	GB687720A	公开(公告)日	1953-02-18
申请人	BATAAFSCHE PETROLEUM;			发明人
摘要	The reaction of polybutadiene with sulphur dioxide, in which a solution of polybutadiene activated by a hydroperoxide or by another oxygen-yielding substance in combination with an ether, is extruded into a sulphur dioxide solution to form threads, fibres, tapes or films, is characterized by using polybutadiene obtained by emulsion polymerization. The polymerization temperature is preferably not above 25 DEG C. The products are stated to be mechanically and chemically more stable than those obtained from sodium polybutadiene, and the stability is independent of the sulphur content. The sulphur content also is independent, within wide limits, of the sulphur dioxide concentration, which is preferably 60-200 gms./litre, and of the temperature, which may be between 12 DEG and 30 DEG C. Comparisons are given of tensile strengths, stability, elongation, &c. Plasticized rubber or unsaturated, low molecular weight compounds such as 1,5-hexadiene, allyl alcohol or diallyl phthalate, may be present in the polymer solution. Specifications 611,919, 616,276 and 666,640 are referred to.ALSO:The reaction of polybutadiene with sulphurdioxide, in which a solution of polybutadiene activated by a hydroperoxide or by another oxygen-yielding substance in combination with an ether, is extruded into a sulphur dioxide solution to form threads, fibres, tapes or films, is characterised by using polybutadiene obtained by emulsion polymerisation. The polymerisation temperature is preferably not above 25 DEG C. The products are stated to be mechanically and chemically more stable than those obtained from sodium polybutadiene, and the stability is independent of the sulphur content. The sulphur content, also, is independent, within wide limits, of the sulphur dioxide concentration, which is preferably 60-200 gms./litre, and of the temperature, which may be between 12 DEG and 30 DEG C. Comparisons are given of tensile strengths, stability, elongation, &c. Plasticised rubber or unsaturated, low molecular weight compounds such as 1,5-hexadiene, allyl alcohol or diallyl phthalate, may be present in the polymer solution. Specifications 611,919, 616,276 and 666,640 are referred to.
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