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公开(公告)号：US5128380A
公开(公告)日：1992-07-07
申请号：US513660
申请日：1990-04-24
IPC分类号： C08J9/18 , C08F2/44 , C08F259/02 , C08J9/00 , C08J9/20
CPC分类号： C08J9/20 , C08F259/02 , C08J9/0028
摘要： The present invention provides a method for producing expandable thermoplastic polymer particles which comprises conducting polymerization by adding a polymerizable monomer either continuously or intermittently to thermoplastic polymer particles having a uniform particle size suspended in water, the improvement wherein an amide compound is added when the added amount of the polymerizable monomer is not more than one half of the total amount to be added in the course of polymerization and resulting polymer particles are impregnated with an easily volatile blowing agent after completion of addition of the amide compound and the polymerizable monomer. According to the present invention, expandable thermoplastic particles which are capable of giving cells, fine and uniform in size, are obtainable even by expanding immediately after production without any aging period.
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公开(公告)号：US4870143A
公开(公告)日：1989-09-26
申请号：US135452
申请日：1987-12-21
CPC分类号： B01J19/2435 , B01J8/20 , C08F2/18 , Y10S526/91
摘要： By a process for suspension polymerization, which comprises steps of:supplying a slurry comprising droplets of a monomer liquid having a substantially uniform size dispersed in an aqueous dispersion medium to a tower type reactor in which said medium forms a downflow, andsuspension polymerizing the monomer with avoiding merging or splitting of the droplets in a fluidized bed which is formed by the downflow of said medium and buoyancy of the monomer liquid droplets, whereinthe specific gravity of said medium is made larger than that of a polymer particle to be produced by the addition of a water soluble inorganic salt to said medium, anda polycarboxylic acid type anionic polymeric surfactant is used as a suspension stabilizer for the monomer liquid droplets,polymer particles having a substantially uniform size are produced with high polymerization conversion.
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公开(公告)号：US5276113A
公开(公告)日：1994-01-04
申请号：US938515
申请日：1992-09-02
CPC分类号： B01J4/04 , B01J19/1862 , B01J19/1881 , C08F2/18 , B01J2219/00103 , B01J2219/0011 , B01J2219/00164 , B01J2219/182
摘要： There is provided a suspension polymerization process for production of polymer particles having a substantially uniform size, which process comprises the steps of: (a) applying regular vibration to a flow of a monomer liquid which has a specific gravity smaller than that of an aqueous dispersion medium, (b) introducing the aqueous dispersion medium containing the droplets in a first reactor comprising a recycling means which discharges the aqueous dispersion medium from the bottom of the reactor and recycles it to the top of the reactor, (c) partially polymerizing the monomer liquid in the first reactor so that the specific gravity of the droplets does not exceed that of the aqueous dispersion medium while maintaining the suspended condition of the droplets, and (d) discharging the partially polymerized droplets together with the aqueous dispersion medium from a lower portion of the first reactor and introducing them in a second reactor, and (e) further polymerizing the partially polymerized droplets in the second reactor.
摘要翻译： 提供了一种用于生产具有基本均匀尺寸的聚合物颗粒的悬浮聚合方法，该方法包括以下步骤：（a）对比重小于水分散体的比重的单体液体的流动施加规则的振动 介质，（b）将含有液滴的水性分散介质引入第一反应器，该第一反应器包括从反应器底部排出水分散介质并将其再循环到反应器顶部的再循环装置，（c）将单体部分聚合 液体在第一反应器中，使得液滴的比重不超过水分散介质的比重，同时保持液滴的悬浮状态，并且（d）将部分聚合的液滴与水分散介质一起从下部排出 的第一反应器并将其引入第二反应器，和（e）进一步聚合部分聚合物 在第二反应器中精馏液滴。
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公开(公告)号：US5380496A
公开(公告)日：1995-01-10
申请号：US130391
申请日：1993-10-01
CPC分类号： B01J4/04 , B01J19/1862 , B01J19/1881 , C08F2/18 , B01J2219/00103 , B01J2219/0011 , B01J2219/00164 , B01J2219/182
摘要： There is provided an apparatus for suspension polymerization to produce polymer particles having uniform size. The apparatus has a droplet forming device with at least one orifice and a recycle line which recycles the aqueous dispersion medium through the droplet forming device, a first reactor and a second reactor. The apparatus can produce polymer particles having uniform particle size.
摘要翻译： 提供了一种用于制备具有均匀尺寸的聚合物颗粒的悬浮聚合装置。 该装置具有液滴形成装置，其具有至少一个孔口和再循环管线，该再循环管线通过液滴形成装置，第一反应器和第二反应器再循环水分散介质。 该装置可以生产具有均匀粒度的聚合物颗粒。
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