JPH0334492B2 - - Google Patents
Info
- Publication number
- JPH0334492B2 JPH0334492B2 JP57162126A JP16212682A JPH0334492B2 JP H0334492 B2 JPH0334492 B2 JP H0334492B2 JP 57162126 A JP57162126 A JP 57162126A JP 16212682 A JP16212682 A JP 16212682A JP H0334492 B2 JPH0334492 B2 JP H0334492B2
- Authority
- JP
- Japan
- Prior art keywords
- polycarbonate
- granules
- solution
- solvent
- gap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920000515 polycarbonate Polymers 0.000 claims description 66
- 239000004417 polycarbonate Substances 0.000 claims description 66
- 239000008187 granular material Substances 0.000 claims description 29
- 239000002904 solvent Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 15
- 230000008016 vaporization Effects 0.000 claims description 5
- 238000009834 vaporization Methods 0.000 claims description 3
- 238000010924 continuous production Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 description 15
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 12
- 238000010008 shearing Methods 0.000 description 11
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- 238000005469 granulation Methods 0.000 description 5
- 230000003179 granulation Effects 0.000 description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 150000002989 phenols Chemical class 0.000 description 3
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical compound C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 2
- RQCACQIALULDSK-UHFFFAOYSA-N 4-(4-hydroxyphenyl)sulfinylphenol Chemical compound C1=CC(O)=CC=C1S(=O)C1=CC=C(O)C=C1 RQCACQIALULDSK-UHFFFAOYSA-N 0.000 description 2
- 229930185605 Bisphenol Natural products 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- VEORPZCZECFIRK-UHFFFAOYSA-N 3,3',5,5'-tetrabromobisphenol A Chemical compound C=1C(Br)=C(O)C(Br)=CC=1C(C)(C)C1=CC(Br)=C(O)C(Br)=C1 VEORPZCZECFIRK-UHFFFAOYSA-N 0.000 description 1
- VWGKEVWFBOUAND-UHFFFAOYSA-N 4,4'-thiodiphenol Chemical compound C1=CC(O)=CC=C1SC1=CC=C(O)C=C1 VWGKEVWFBOUAND-UHFFFAOYSA-N 0.000 description 1
- ODJUOZPKKHIEOZ-UHFFFAOYSA-N 4-[2-(4-hydroxy-3,5-dimethylphenyl)propan-2-yl]-2,6-dimethylphenol Chemical compound CC1=C(O)C(C)=CC(C(C)(C)C=2C=C(C)C(O)=C(C)C=2)=C1 ODJUOZPKKHIEOZ-UHFFFAOYSA-N 0.000 description 1
- 125000004203 4-hydroxyphenyl group Chemical group [H]OC1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- SDDLEVPIDBLVHC-UHFFFAOYSA-N Bisphenol Z Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)CCCCC1 SDDLEVPIDBLVHC-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- VCCBEIPGXKNHFW-UHFFFAOYSA-N biphenyl-4,4'-diol Chemical group C1=CC(O)=CC=C1C1=CC=C(O)C=C1 VCCBEIPGXKNHFW-UHFFFAOYSA-N 0.000 description 1
- 238000011437 continuous method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
Description
【発明の詳細な説明】
本発明はポリカーボネート粒状体の連続製造方
法に関するものである。更に詳しくはポリカーボ
ネート溶液から嵩密度が大きく、粒径の揃つたポ
リカーボネート粒状体を連続的に製造する方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuously producing polycarbonate granules. More specifically, the present invention relates to a method for continuously producing polycarbonate granules having a large bulk density and uniform particle size from a polycarbonate solution.
ポリカーボネート溶液からポリカーボネート粒
状体を連続的に得る方法として、従来多数の提案
がなされており、ポリカーボネート溶液を特殊２
軸ニーダーで粉末化する方法（特公昭53−15899
号、特開昭54−3897号）、ポリカーボネート溶液
と水蒸気を、均一に撹拌されているポリカーボネ
ート粒状体を収納した容器中に供給する方法（特
開昭54−162753号）などが提案されている。 Many proposals have been made in the past as a method for continuously obtaining polycarbonate granules from a polycarbonate solution.
Method of powdering with a shaft kneader (Special Publication No. 53-15899)
(Japanese Patent Application Laid-Open No. 1983-162753), and a method of supplying a polycarbonate solution and water vapor into a container containing uniformly stirred polycarbonate granules (Japanese Patent Application Laid-open No. 162753/1989), etc. .
しかしながら、これらの公知の方法では、装置
内においてポリカーボネート溶液とポリカーボネ
ート粒状体を同時に撹拌させる為、長時間の連続
運転において塊状物の生成によるトラブルが生じ
たり、また装置内壁へのポリカーボネートの付着
焼き付きを防止する為に除去した溶媒を再度添加
するなど熱的に不利な操作を要し、しかも粒度分
布が広くなりやすく、粒度調整用の粉砕機を必要
とする場合もあり、いずれも満足すべきものとは
いい難い。 However, in these known methods, since the polycarbonate solution and polycarbonate granules are simultaneously stirred in the equipment, troubles may occur due to the formation of lumps during long-term continuous operation, and the polycarbonate may adhere to the inner walls of the equipment. In order to prevent this, thermally disadvantageous operations such as re-adding the removed solvent are required, and the particle size distribution tends to become wide, and a pulverizer for particle size adjustment may be required. Yes, it's difficult.
本発明者は、上述の如き困難を克服してポリカ
ーボネート溶液から嵩密度が大きく粒径の揃つた
ポリカーボネート粒状体を連続的に製造する方法
について鋭意研究を重ねた結果、回転により剪断
力を生ずるようにした間隙にポリカーボネート溶
液を通過させて該溶液に剪断力と遠心作用を加
え、同時に溶媒の一部を気化させてポリカーボネ
ートの結晶化と粒状化を促進させ、これによつて
溶媒を吸蔵したポリカーボネートの粒状体を得、
しかるのち残留する溶媒を公知の方法で除去する
ことによつて容易に目的を達し得ことを見い出
し、本発明に到達したものである。 The inventor of the present invention has conducted extensive research into a method for continuously producing polycarbonate granules with large bulk density and uniform particle size from a polycarbonate solution by overcoming the above-mentioned difficulties. A polycarbonate solution is passed through the gap formed by the polycarbonate, applying shearing force and centrifugal action to the solution, and at the same time vaporizing a portion of the solvent to promote crystallization and granulation of the polycarbonate, thereby creating a polycarbonate that has occluded the solvent. Obtain granules of
The inventors have discovered that the objective can be easily achieved by removing the remaining solvent by a known method, and have thus arrived at the present invention.
本発明は、工業的に有利に良好な性状のポリカ
ーボネート粒状体を連続的製造する方法を提供す
ることを目的とするものである。 An object of the present invention is to provide an industrially advantageous method for continuously producing polycarbonate granules with good properties.
かかる目的は、本発明の主たる特徴、すなわち
ポリカーボネート溶液からポリカーボネート粒状
体を製造する方法において、回転により剪断力を
生ずるようにした間隙にポリカーボネート溶液を
通過させて該溶液に剪断力と遠心作用を加え、同
時に溶媒の一部を気化させて溶媒を吸蔵したポリ
カーボネート粒状体を得、しかるのち該粒状体中
の溶媒を除去することを特徴とするポリカーボネ
ート粒状体の連続製造方法によつて達成される。 This purpose is achieved by the main feature of the present invention, that is, in the method of producing polycarbonate granules from a polycarbonate solution, the polycarbonate solution is passed through a gap in which shear force is generated by rotation, and shear force and centrifugal action are applied to the solution. This is achieved by a continuous method for producing polycarbonate granules, which is characterized by simultaneously vaporizing a part of the solvent to obtain polycarbonate granules that occlude the solvent, and then removing the solvent in the granules.
本発明の特徴は、上記した如く、間隙内におけ
るポリカーボネート溶液に、回転により剪断力と
遠心作用を加える点であり、該溶液は遠心作用に
よつて滞留すことなくゆつくりと移動し、この間
剪断作用によつてポリカーボネートは結晶体とな
り、続いて継続する剪断作用によつて嵩密度およ
び粒度分布がその後の乾燥および溶融押出しに好
適な状態で得られる。 As mentioned above, the feature of the present invention is that rotation applies shear force and centrifugal action to the polycarbonate solution in the gap, and the solution moves slowly without stagnation due to the centrifugal action, and during this time shear The action crystallizes the polycarbonate and the subsequent shear action provides a bulk density and particle size distribution suitable for subsequent drying and melt extrusion.
本発明に用いられるポリカーボネートは、通常
酸受容体および分子量調節剤の存在下での２価フ
エノールとホスゲンの如きカーボネート前駆体と
の反応によつて製造される。上記２価フエノール
はビスフエノール類が好ましく、特に2.2−ビス
（4′−ヒドロキシフエニル）プロパン（以下、ビ
スフエノールＡと称する）が好ましい。またビス
フエノールＡの一部または全部を他の２価フエノ
ールで置換してもよい。ビスフエノールＡ以外の
２価フエノールとしては、例えばハイドロキノ
ン、４，4′−ジヒドロキシジフエニル、ビス（４
−ヒドロキシフエニル）メタもしくはエタン、
１，１−ビス（４−ヒドロキシフエニル）シクロ
ヘキサン、ビス（４−ヒドロキシフエニル）スル
フイド、ビス（４−ヒドロキシフエニル）スルホ
ン、ビス（４−ヒドロキシフエニル）スルホキシ
ド、ビス（４−ヒドロキシフエニル）エーテル等
の如き化合物、または２，２−ビス（3′，5′−ジ
ブロモ−4′−ヒドロキシフエニル）プロパン、
２，２−ビス（3′，5′−ジメチル−4′−ヒドロキ
シフエニル）プロパンの如き核置換ビスフエノー
ル類があげられる。これらの２価フエノール類か
ら製造されるポリカーボネートは、ホモポリマー
またはコポリマーであつてよく、或はそれらの混
合物であつてもよい。 The polycarbonates used in this invention are usually prepared by the reaction of dihydric phenols with carbonate precursors such as phosgene in the presence of an acid acceptor and a molecular weight regulator. The divalent phenol is preferably a bisphenol, with 2,2-bis(4'-hydroxyphenyl)propane (hereinafter referred to as bisphenol A) being particularly preferred. Further, part or all of bisphenol A may be replaced with other divalent phenol. Examples of divalent phenols other than bisphenol A include hydroquinone, 4,4'-dihydroxydiphenyl, bis(4
-hydroxyphenyl) meta or ethane,
1,1-bis(4-hydroxyphenyl)cyclohexane, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)sulfone, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)sulfoxide or 2,2-bis(3',5'-dibromo-4'-hydroxyphenyl)propane,
Examples include nuclear substituted bisphenols such as 2,2-bis(3',5'-dimethyl-4'-hydroxyphenyl)propane. Polycarbonates made from these dihydric phenols may be homopolymers or copolymers, or mixtures thereof.
ポリカーボネート溶液を構成する溶媒として
は、塩化メチレン、クロロホルム、塩化エチレン
等の如き、ハロゲン化炭化水素を良溶媒としてあ
げることができる。 Good solvents constituting the polycarbonate solution include halogenated hydrocarbons such as methylene chloride, chloroform, and ethylene chloride.
本発明に用いられるポリカーボネート溶液は、
前記のポリカーボネートを前記の溶媒に溶解した
ものであつて、その濃度は特に制限されず、過飽
和領域のものまで用いることが可能である。しか
しながら、濃度の高い方が有利であり、好ましく
は20〜50重量％の範囲である。この濃度が20重量
％未満では間隙を構成する装置径を大きくする
か、時間当りの処理量を少なくすることが必要に
なり、また50重量％を越える濃度では本発明の方
法を実行する前段階での流動性を維持することが
非常に難しい。 The polycarbonate solution used in the present invention is
The above-mentioned polycarbonate is dissolved in the above-mentioned solvent, and its concentration is not particularly limited, and it is possible to use one up to a supersaturated region. However, higher concentrations are advantageous, preferably in the range 20-50% by weight. If this concentration is less than 20% by weight, it will be necessary to increase the diameter of the device forming the gap or reduce the processing amount per hour, and if the concentration exceeds 50% by weight, it will be necessary to It is very difficult to maintain liquidity.
本発明の方法においては、ポリカーボネート溶
液を剪断力が生ずるようにした間隙に連続的に供
給する導入部、並びに溶媒蒸気および生成したポ
リカーボネート粒状体の排出部を備え、かつポリ
カーボネートが固化する時間が得られるだけの移
動距離をもつた装置を用いる。剪断力を生じるよ
うにした間隙は、少なくとも１対の盤で構成され
るか、または外壁と内壁で２重構造をもつた円錐
体で構成されることが好ましい。一対の盤で構成
され、間隙でポリカーボネート溶液に剪断力を加
えることのできる装置として、例えば添付した第
１図に示されているような主要部を有する装置が
あげられる。第１図は造粒装置の主要部縦断側面
図である。第１図において剪断力を生じるように
した間隙とは固定盤２と回転盤３とによつて形成
される間隙４である。固定盤２には、図示してい
ない温度調節用媒体を通じ得るジヤケツト等を配
設することが可能である。駆動軸５によつて回転
盤３を回転させながらポリカーボネート溶液を供
給口１から供給すると、該溶液は間隙４において
固定盤２と回転盤３との速度差によつて剪断力を
受け、同時に遠心作用も受ける。また、一対の盤
で構成される間隙を有する装置としては、第１図
のように盤の一方を回転されるものと同様に、両
方の盤を異なる方向にまたは異なる速度で回転せ
るようにしたものを用いることもできる。 The method of the present invention includes an introduction section for continuously supplying the polycarbonate solution into the gap where shear force is generated, and a discharge section for the solvent vapor and the produced polycarbonate granules, and provides time for the polycarbonate to solidify. Use equipment with sufficient travel distance. Preferably, the gap that generates a shearing force is composed of at least one pair of discs or a conical body having a double structure with an outer wall and an inner wall. An example of an apparatus that is composed of a pair of discs and is capable of applying shearing force to the polycarbonate solution in the gap is an apparatus that has a main part as shown in the attached FIG. 1, for example. FIG. 1 is a longitudinal sectional side view of the main part of the granulation device. In FIG. 1, the gap that generates the shearing force is the gap 4 formed by the fixed plate 2 and the rotary plate 3. The fixed platen 2 can be provided with a jacket or the like through which a temperature regulating medium (not shown) can be passed. When a polycarbonate solution is supplied from the supply port 1 while rotating the rotary disk 3 by the drive shaft 5, the solution is subjected to shearing force in the gap 4 due to the speed difference between the fixed disk 2 and the rotary disk 3, and at the same time is centrifuged. It is also affected. Furthermore, as a device with a gap consisting of a pair of disks, both disks can be rotated in different directions or at different speeds, similar to the device in which one of the disks is rotated as shown in Figure 1. You can also use
また、二重構造の円錐体であつてその外壁と内
壁で形成する間隙でポリカーボネート溶液に剪断
力を加えることのできる装置としては、例えば切
除した形の截頭円錐体を含む装置があげられ、該
装置は軸方向断面の間隙が必ずしも直線である必
要はなく、回転によつて遠心作用が生ずる構造を
有すれば良い。この装置における剪断力を加える
機構は間隙が一対の盤で形成されているものと
ほゞ同様であることが理解されよう。 In addition, as a device that is a double-structured cone and can apply shearing force to the polycarbonate solution in the gap formed by its outer and inner walls, there is, for example, a device that includes a truncated cone, The device does not necessarily have to have a straight gap in its axial cross section, but only needs to have a structure in which centrifugal action is produced by rotation. It will be appreciated that the mechanism for applying shear force in this device is substantially similar to one in which the gap is formed by a pair of disks.
本発明における間隙の大きさは、ポリカーボネ
ート溶液にかかる剪断力の効果と反比例の関係に
あり、特に限定されるものではないが６mm以下程
度が有利であり、好ましくは0.1〜1.5mmである。 The size of the gap in the present invention is inversely proportional to the effect of shearing force applied to the polycarbonate solution, and is not particularly limited, but is advantageously about 6 mm or less, preferably 0.1 to 1.5 mm.
剪断力は大きい程ポリカーボネートの結晶化を
促進するが、工業的にはポリカーボネート粒状体
１Kg基準で少なくとも0.01kwhが必要である。 The larger the shearing force, the more the crystallization of polycarbonate is promoted, but industrially it is required to be at least 0.01 kwh based on 1 kg of polycarbonate granules.
本発明の方法ではポリカーボネート溶液をかか
る装置に連続供給すると、該溶液は強い剪断力を
受けるとともに回転による遠心作用で滞留するこ
となくゆつくりと移動し、ゲル化濃度に達するま
で濃縮が進み、やがて流動性を失ないやわらかい
ヒモ状物を形成するようになる。そしてヒモ状物
の末端から崩れるように粒状体に変化し、排出さ
れるまでに粉砕と造粒作用をくり返し受け、粒度
の揃つた状態で排出部から連続的に排出される。 In the method of the present invention, when a polycarbonate solution is continuously supplied to such an apparatus, the solution is subjected to a strong shearing force and moves slowly without stagnation due to the centrifugal action of rotation, and the concentration progresses until it reaches a gelling concentration, and eventually It forms a soft string-like substance that does not lose its fluidity. From the end of the string, the string-like material collapses into granules, undergoes repeated crushing and granulation actions before being discharged, and is continuously discharged from the discharge section with uniform particle size.
この場合、回転盤や回転円錐体に案内溝や山部
を入れてポリカーボネートの移動時間を調節する
ことも可能である。またポリカーボネートの結晶
化を促進する目的で貧溶媒としてベンゼン、トル
エン等の如き芳香族炭化水素を間隙に添加しても
かまわない。 In this case, it is also possible to adjust the travel time of the polycarbonate by inserting guide grooves or peaks into the rotary disk or rotating cone. Further, an aromatic hydrocarbon such as benzene, toluene, etc. may be added to the gap as a poor solvent for the purpose of promoting crystallization of polycarbonate.
かくして、溶媒を吸蔵したポリカーボネート粒
状体が連続的に得られる。 In this way, polycarbonate granules that occlude the solvent are continuously obtained.
本発明においては、次いで上記ポリカーボネー
ト粒状体から溶媒のみを公知の方法で除去する。
例えば、ポリカーボネート粉状体を、溶媒の気化
温度以上の温度に加熱して該溶媒を除去する。 In the present invention, only the solvent is then removed from the polycarbonate granules by a known method.
For example, polycarbonate powder is heated to a temperature higher than the vaporization temperature of the solvent to remove the solvent.
本発明は、溶媒を回収する目的で容器内で実施
することができ、この場合、その器内圧力は特に
制限されないが好ましくは常圧以下が良い。温度
は供給口付近を溶媒の沸点より２〜３℃以下に、
排出口付近は溶媒の沸点以上にした温度勾配をつ
ける方法が以下に述べる理由で良い。本発明にお
ける処理温度は、ポリカーボネート溶液濃度また
は雰囲気圧力（例えば器内圧力）などによつて左
右されるが、溶液供給口付近は溶媒の気化による
発泡がポリカーボネート溶液の流れを妨害するこ
とがあるので、供給圧力に合わせて温度を調節す
ることが好ましい。また排出口付近の温度を高く
し過ぎると、非晶質で嵩密度の小さい粒状体やフ
レークができることがあり、消費電力の増大を招
き、好ましくない。 The present invention can be carried out in a container for the purpose of recovering the solvent, and in this case, the pressure inside the container is not particularly limited, but is preferably equal to or lower than normal pressure. The temperature near the supply port should be 2 to 3 degrees Celsius below the boiling point of the solvent.
It is preferable to create a temperature gradient around the outlet near the boiling point of the solvent for the reasons described below. The processing temperature in the present invention depends on the concentration of the polycarbonate solution or the atmospheric pressure (for example, the pressure inside the vessel), but foaming caused by vaporization of the solvent may obstruct the flow of the polycarbonate solution near the solution supply port. , it is preferable to adjust the temperature in accordance with the supply pressure. Furthermore, if the temperature near the discharge port is made too high, amorphous particles or flakes with a low bulk density may be formed, which is undesirable as it increases power consumption.
本発明方法によれば0.3〜0.7ｇ／cm3程度の嵩密
度を有する多孔質のポリカーボネート粒状体を得
ることができ、粒径が揃つていて微粉や巨大粒子
を含まないので、以後の乾燥、加工に好都合であ
る。また間隙に、剪断力が常に作用している為、
加熱や冷却を実施しても、ポリカーボネートの固
着、焼き付きなど全く発生しなく工業的に極めて
有利である。 According to the method of the present invention, porous polycarbonate granules having a bulk density of about 0.3 to 0.7 g/cm 3 can be obtained, and since the particle size is uniform and does not contain fine powder or giant particles, subsequent drying is possible. , which is convenient for processing. Also, since shearing force is constantly acting on the gap,
Even when heated or cooled, the polycarbonate does not stick or seize at all, which is extremely advantageous industrially.
以下、実施例によつて本発明を具体的に説明す
る。 Hereinafter, the present invention will be specifically explained with reference to Examples.
実施例 １
直径500mmの１方を固定した回転円盤よりなる。
添付図面（第１図）に示す。主要部を有する造粒
装置を用い、常圧状態において、ポリカーボネー
ト粒状体の製造を行なつた。ポリカーボネート溶
液としてビスフエノールＡを用いて合成された平
均分子量23000のポリカーボネートを32重量％含
有する塩化メチレン溶液を毎時100Kgで供給口１
より供給したところ間隙４の末端より毎時45Kgの
ポリカーボネート粒状体が得られた。この時、間
隙４の大きさは0.75mm、間隙末端（排出口）付近
温度は50℃、回転盤３の回転数は180rpmであり
ポリカーボネート１Kg当りの剪断力は0.15kwhで
あつた。Example 1 Consists of a rotating disk with a diameter of 500 mm and one side fixed.
This is shown in the accompanying drawing (Figure 1). Polycarbonate granules were produced under normal pressure using a granulation apparatus having a main part. A methylene chloride solution containing 32% by weight of polycarbonate with an average molecular weight of 23,000 synthesized using bisphenol A as a polycarbonate solution was fed to port 1 at a rate of 100 kg per hour.
When the polycarbonate particles were fed from the end of gap 4, 45 kg of polycarbonate granules were obtained per hour. At this time, the size of the gap 4 was 0.75 mm, the temperature near the end of the gap (discharge port) was 50°C, the rotation speed of the rotary disk 3 was 180 rpm, and the shearing force per 1 kg of polycarbonate was 0.15 kwh.
吸蔵する溶媒を50〜60℃の温度に該粒状体を加
熱して除去した後のポリカーボネート粒状体の嵩
密度は0.62ｇ／cm3であつた。この粒度分布は24メ
ツシユの篩を通過しないものは１％、80メツシユ
を通過するものは12％であつた。 After the occluded solvent was removed by heating the granules to a temperature of 50 to 60°C, the bulk density of the polycarbonate granules was 0.62 g/cm 3 . In this particle size distribution, 1% of the particles did not pass through a 24-mesh sieve, and 12% passed through an 80-mesh sieve.
実施例 ２
実施例１と同じ装置で常圧状態においてポリカ
ーボネート粒状体の製造を行なつた。ポリカーボ
ネート溶液としてビスフエノールＡを用いて合成
された平均分子量23000のポリカーボネートを25
重量％含有する塩化メチレン溶液を毎時90Kgで供
給口１より供給したところ間隙４の末端（排出
口）より毎時38Kgのポリカーボネート粒状体が得
られた。この時、間隙４の大きさは1.5mm、排出
口付近温度は60℃、回転盤３の回転数は180rpm
であり、ポリカーボネート１Kg当りの剪断力は
0.09kwhであつた。吸蔵する溶媒を、50〜60℃の
温度で除去した後のポリカーボネート粒状体の嵩
密度は0.57ｇ／cm3であつた。この粒度分布は12メ
ツシユの篩を通過しないものは０％、80メツシユ
を通過するものは５％であつた。Example 2 Polycarbonate granules were produced using the same equipment as in Example 1 under normal pressure conditions. Polycarbonate with an average molecular weight of 23,000 synthesized using bisphenol A as a polycarbonate solution was
When a methylene chloride solution containing % by weight was fed from the feed port 1 at a rate of 90 kg per hour, 38 kg of polycarbonate granules were obtained from the end of the gap 4 (discharge port) per hour. At this time, the size of gap 4 is 1.5 mm, the temperature near the discharge port is 60°C, and the rotation speed of rotary plate 3 is 180 rpm.
The shear force per 1 kg of polycarbonate is
It was 0.09kwh. After removing the occluded solvent at a temperature of 50-60°C, the bulk density of the polycarbonate granules was 0.57 g/cm 3 . In this particle size distribution, 0% of particles did not pass through a 12-mesh sieve, and 5% of particles passed through an 80-mesh sieve.
※タイラー標準篩によつて測定した。 *Measured using Tyler standard sieve.
第１図は本発明に用い得る造粒装置の主要部分
を示す主要部縦断側面図である。
１……供給口、２……固定盤、３……回転盤、
４……間隙（排出兼脱気口）、５……駆動軸。
FIG. 1 is a longitudinal sectional side view showing the main parts of a granulation device that can be used in the present invention. 1... Supply port, 2... Fixed plate, 3... Rotating plate,
4... Gap (discharge/deaeration port), 5... Drive shaft.
Claims (1)
粒状体を製造する方法において、回転によつて剪
断力を生ずようにした間隙にポリカーボネート溶
液を通過させて該溶液に剪断力と遠心作用を加
え、同時に溶媒の一部を気化させて溶媒を吸蔵し
たポリカーボネート粒状体を得、しかるのちに該
粒状体中の溶媒を除去することを特徴とするポリ
カーボネート粒状体の連続製造方法。1. In a method for producing polycarbonate granules from a polycarbonate solution, a polycarbonate solution is passed through a gap in which shear force is generated by rotation to apply shear force and centrifugal action to the solution, and at the same time a part of the solvent is removed. 1. A method for continuous production of polycarbonate granules, which comprises obtaining polycarbonate granules in which a solvent is occluded by vaporization, and then removing the solvent in the granules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16212682A JPS5952609A (en) | 1982-09-20 | 1982-09-20 | Continuous production of polycarbonate granules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16212682A JPS5952609A (en) | 1982-09-20 | 1982-09-20 | Continuous production of polycarbonate granules |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5952609A JPS5952609A (en) | 1984-03-27 |
| JPH0334492B2 true JPH0334492B2 (en) | 1991-05-22 |
Family
ID=15748530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16212682A Granted JPS5952609A (en) | 1982-09-20 | 1982-09-20 | Continuous production of polycarbonate granules |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5952609A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6172055A (en) * | 1984-09-18 | 1986-04-14 | Mitsubishi Chem Ind Ltd | Granular polycarbonate resin composition |
| JP2546724B2 (en) * | 1989-03-28 | 1996-10-23 | 旭化成工業株式会社 | Polycarbonate prepolymer porous body, method for producing the same, and method for producing aromatic polycarbonate using the same |
| DE4022232A1 (en) * | 1990-07-12 | 1992-01-16 | Bayer Ag | CONTINUOUS DEPOSITION OF AROMATIC POLYCARBONATES IN PART CRYSTALLINE FORM FROM SOLUTIONS IN CH (DOWN ARROW) 2 (DOWN ARROW) CL (DOWN ARROW) 2 (DOWN ARROW) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51123266A (en) * | 1975-04-19 | 1976-10-27 | Idemitsu Kosan Co | Method of continuous production of copolymer type polycarbonate resin powder |
-
1982
- 1982-09-20 JP JP16212682A patent/JPS5952609A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51123266A (en) * | 1975-04-19 | 1976-10-27 | Idemitsu Kosan Co | Method of continuous production of copolymer type polycarbonate resin powder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5952609A (en) | 1984-03-27 |
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