发明授权
US3644319A Aftertreatment of vinylidene fluoride polymers prepared in the presence of alkylperoxydicarbonate comprising heat treatment of the polymers with water
失效
在含有聚合物与水的热处理的烷基二氧化硅的存在下制备的乙烯基氟化物聚合物的后处理
- 专利标题： Aftertreatment of vinylidene fluoride polymers prepared in the presence of alkylperoxydicarbonate comprising heat treatment of the polymers with water
- 专利标题（中）： 在含有聚合物与水的热处理的烷基二氧化硅的存在下制备的乙烯基氟化物聚合物的后处理
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申请号： US3644319D申请日： 1968-04-10
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公开(公告)号： US3644319A公开(公告)日： 1972-02-22
- 发明人: SEKI SHIGERU , SANADA HISAO
- 申请人： KUREHA CHEMICAL IND CO LTD
- 专利权人： Kureha Chemical Ind Co Ltd
- 当前专利权人： Kureha Chemical Ind Co Ltd
- 优先权： JP2536167 1967-04-20
- 主分类号： C08F6/10
- IPC分类号： C08F6/10 ; C08F3/22
摘要：
A VINYLIDENE FLUORIDE POLYMER OBTAINED BY POLYMERIZATION WITH THE USE OF ORGANIC PEROXIDE AS A CATALYST IS SUBJECTED, PRIOR TO DRYING, TO A HEAT TREATMENT AT A TEMPERATURE FROM 70 TO 120 DEGREES C. AND IN THE CONSTANT PRESENCE OF WATER IN ORDER TO CAUSE DECOMPOSITION AND REMOVAL OF RESIDUAL CATALYST, WHEREBY THE THERMAL STABILITY OF THE POLYMER IS GREATLY IMPROVED. THE HEAT TREATMENT CAN BE CARRIED OUT BY INDIRECT HEATING FROM OUTSIDE, BY BLOWING STEAM INTO A SSPENSION OF THE POLYMER IN WATER, OR BY FLUIDIZED TREATMENT OF THE POLYMER WITH STEAM.
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