发明授权
US3677922A Polymerization of tetraoxane in the presence of an acetal and a sulfur initiator
失效
在乙醇和硫酸钠引发剂存在下，四氢呋喃的聚合
- 专利标题： Polymerization of tetraoxane in the presence of an acetal and a sulfur initiator
- 专利标题（中）： 在乙醇和硫酸钠引发剂存在下，四氢呋喃的聚合
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申请号： US3677922D申请日： 1970-06-19
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公开(公告)号： US3677922A公开(公告)日： 1972-07-18
- 发明人: ITO AKIHIKO , NAKASE YOSHIAKI , KOJIMA KATSUMI , YOSHIDA MASARU , IWAI TADASHI , HAYASHI KOICHIRO , OKAMURA SEIZO
- 申请人： JAPAN ATOMIC ENERGY RES INST
- 专利权人： Japan Atomic Energy Res Inst
- 当前专利权人： Japan Atomic Energy Res Inst
- 优先权： JP4828569 1969-06-20
- 主分类号： C08G2/00
- IPC分类号： C08G2/00 ; C08G4/00 ; C08D1/00 ; C08F1/16 ; C08F3/40
摘要：
A THERMALLY STABILIZED OXYMETHYLENE POLYMER IS OBTAINED BY POLYMERIZING TETRAOXANE IN THE PRESENCE OF AN ACETAL AND A POLYMERIZATION INITATOR SELECTED FROM THE GROUP CONSISTING OF SULFUR AND AN ORGANIC SULFUR COMPOUND. IRRADIATION BY AN IONIZING RADIATION OF AN ACTINIC LIGHT CAN ADVANTAGEOUSLY BE EMPLOYED IN THE POLYMERIZATION. SAID THERMAL STABILITY IS FURTHER IMPROVED, WHEN TETRAOXANE IS POLYMERIZED BY USING A SPECIFIC COMBINATION OF AN ACETAL SUCH AS METHYLAL, ETHYLAL, 1,3-DIOXOLANE, 1,3DIOXANE, ETC. AND AN INITIATOR SUCH AS THIIRANES, THIOCYANATES, ISOTHIOCYANATES, ETHYLENETHIOUREA, TRITHIANOXIDES, ECT.
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