JP3316891B2 - Method for producing vinyl chloride polymer - Google Patents
Method for producing vinyl chloride polymerInfo
- Publication number
- JP3316891B2 JP3316891B2 JP33044392A JP33044392A JP3316891B2 JP 3316891 B2 JP3316891 B2 JP 3316891B2 JP 33044392 A JP33044392 A JP 33044392A JP 33044392 A JP33044392 A JP 33044392A JP 3316891 B2 JP3316891 B2 JP 3316891B2
- Authority
- JP
- Japan
- Prior art keywords
- vinyl chloride
- chloride polymer
- polymer
- weight
- vinyl
- 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 - Fee Related
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、懸濁重合法により塩化
ビニル系重合体を製造する方法に関し、特に、優れた流
動性を有する塩化ビニル系重合体の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a vinyl chloride polymer by a suspension polymerization method, and more particularly to a method for producing a vinyl chloride polymer having excellent fluidity.
【０００２】[0002]
【従来の技術】塩化ビニル系重合体は、通常、懸濁重合
法によって製造され、スラリーからの分離、乾燥等の精
製の後、空気輸送により搬送後保管され、あるいは袋詰
めされる。2. Description of the Related Art A vinyl chloride polymer is usually produced by a suspension polymerization method, separated from a slurry, purified by drying and the like, and then conveyed by pneumatic transportation and then stored or packed in a bag.
【０００３】しかしながら、このようにして得られた塩
化ビニル系重合体は、搬送や袋詰の過程でそれ自体およ
び他の物との摩擦により静電気を帯び流動性が低下し、
製造直後の塩化ビニル系重合体に比べて嵩比重が減少す
るため、著しく取り扱いにくくなり、作業に重大な支障
をきたすという問題がある。このような重合体の帯電に
よる悪影響を低減する方法として、従来、帯電防止剤で
ある非イオン系界面活性剤またはカチオン系界面活性剤
等を塩化ビニル系重合体に添加する方法やスチームを塩
化ビニル重合体に吹込んで湿度を調整する方法が用いら
れてきた。[0003] However, the vinyl chloride polymer thus obtained is charged with static electricity due to friction with itself and other objects in the process of transportation and bagging, and its fluidity is reduced.
Since the bulk specific gravity is lower than that of the vinyl chloride polymer immediately after the production, there is a problem that the handling becomes extremely difficult and the operation is seriously hindered. Conventionally, as a method of reducing the adverse effect of such a polymer charge, a method of adding a nonionic surfactant or a cationic surfactant which is an antistatic agent to a vinyl chloride polymer, or a method of adding steam to vinyl chloride. A method of adjusting humidity by blowing into a polymer has been used.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記の界面活
性剤を添加する方法は、重合体の嵩比重の減少を十分に
防止することができず、さらに製品の熱安定性および初
期着色性に悪影響を与えるという欠点を有している。ま
た、スチームを吹込む方法では必要な労働力の増加、設
備の複雑化等を招くという欠点を有している。そこで、
本発明の目的は、帯電による嵩比重の減少が起こりにく
く、しかも、良好な品質を有する塩化ビニル系重合体を
製造する方法を提供することにある。However, the above method of adding a surfactant cannot sufficiently prevent a decrease in bulk specific gravity of the polymer, and furthermore, has an adverse effect on the thermal stability and initial coloring property of the product. It has the disadvantage of adverse effects. Further, the method of injecting steam has a drawback that the required labor increases and the equipment becomes complicated. Therefore,
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a vinyl chloride polymer having a good quality, in which a decrease in bulk specific gravity due to charging hardly occurs.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、上記目的
を達成するために鋭意検討を行った結果、本発明を完成
するに至った。すなわち本発明は塩化ビニル単量体また
は塩化ビニルを主成分とするビニル系単量体の混合物を
水性媒体中で懸濁重合し、塩化ビニル系重合体を製造す
るに際し、塩化ビニル系重合体を含有するスラリーを脱
水した後に、エチレングリコール、プロピレングリコー
ル、ペンタエリスリトール及びこれらの多量体並びにグ
リセリンから選ばれる多価アルコールを濃度５〜９０％
の水溶液として前記塩化ビニル系重合体に対して０．０
０１〜０．５重量部添加することからなる塩化ビニル系
重合体の製造方法である。Means for Solving the Problems The present inventors have made intensive studies to achieve the above object, and as a result, completed the present invention. That is, in the present invention, a vinyl chloride monomer or a mixture of vinyl monomers containing vinyl chloride as a main component is subjected to suspension polymerization in an aqueous medium to produce a vinyl chloride polymer. After dehydrating the slurry, ethylene glycol, propylene glycol
And pentaerythritol and their multimers and
Polyhydric alcohol selected from Lyserine at a concentration of 5-90%
Of the vinyl chloride polymer as an aqueous solution of
This is a method for producing a vinyl chloride-based polymer comprising adding 0.01 to 0.5 parts by weight.
【０００６】本発明の方法では、まず、懸濁重合方法に
より塩化ビニル系重合体が合成される。塩化ビニル系重
合体として、塩化ビニルの単独重合体あるいは塩化ビニ
ルと共重合可能な他の重合性ビニル系単量体との共重合
体が挙げられる。塩化ビニルと共重合可能なビニル系単
量体としては、例えば、酢酸ビニルのようなアルキルビ
ニルエステル、セチルビニルエーテルのようなアルキル
ビニルエーテル、エチレンまたはプロピレンなどのα−
モノオレフィン系単量体、アクリル酸メチルのようなア
クリル酸アルキルエステル、メタクリル酸メチルのよう
なメタクリル酸アルキルエステルが挙げられる。In the method of the present invention, first, a vinyl chloride polymer is synthesized by a suspension polymerization method. Examples of the vinyl chloride polymer include a homopolymer of vinyl chloride and a copolymer with another polymerizable vinyl monomer copolymerizable with vinyl chloride. Examples of vinyl monomers copolymerizable with vinyl chloride include alkyl vinyl esters such as vinyl acetate, alkyl vinyl ethers such as cetyl vinyl ether, α-
Monoolefinic monomers, alkyl acrylates such as methyl acrylate, and alkyl methacrylates such as methyl methacrylate are exemplified.
【０００７】塩化ビニル系重合体の懸濁重合は良く知ら
れており、塩化ビニル単量体または塩化ビニル単量体と
他の重合性ビニル単量体とを懸濁剤、重合開始剤の存在
下、水性媒体中で重合させる。こうして、懸濁重合法に
より塩化ビニル系重合体を含有するスラリーを得ること
ができる。[0007] Suspension polymerization of vinyl chloride polymers is well known and involves the use of a vinyl chloride monomer or a vinyl chloride monomer and another polymerizable vinyl monomer in the presence of a suspending agent and a polymerization initiator. Below, it is polymerized in an aqueous medium. Thus, a slurry containing the vinyl chloride polymer can be obtained by the suspension polymerization method.
【０００８】次に、本発明の方法によると、塩化ビニル
系重合体を含有するスラリーを脱水した後、得られた重
合体ケーキまたは該重合体ケーキを乾燥した塩化ビニル
系重合体の粉末にエチレングリコール、プロピレングリ
コール、ペンタエリスリトール及びこれらの多量体並び
にグリセリンから選ばれる多価アルコールを濃度５〜９
０％の水溶液として添加する。このような多価アルコー
ルとしては、これらを主成分とする水溶性多価アルコー
ル類であってもよい。上記の多価アルコールの添加量
は、塩化ビニル重合体１００重量部に対して０．００１
〜０．５重量部添加することが望ましい。その添加量が
０．００１重量部未満であると帯電によるかさ比重の極
端な低下を防止できない。添加量が０．５重量部を超え
ても添加の効果はそれ以上高まらないので経済的でな
い。Next, according to the method of the present invention, after the slurry containing the vinyl chloride polymer is dehydrated, ethylene polymer is added to the obtained polymer cake or the dried vinyl chloride polymer powder. Glycol, propylene glycol
Cole, pentaerythritol and their multimers
And a polyhydric alcohol selected from glycerin in a concentration of 5 to 9
Add as 0% aqueous solution. Such polyhydric alcohols may be water-soluble polyhydric alcohols containing these as main components. The amount of the polyhydric alcohol added is 0.001 to 100 parts by weight of the vinyl chloride polymer.
It is desirable to add 0.5 parts by weight. If the amount is less than 0.001 part by weight, it is not possible to prevent an extreme decrease in bulk specific gravity due to charging. If the amount exceeds 0.5 parts by weight, the effect of the addition does not increase any more, so it is not economical.
【０００９】[0009]
【実施例】以下、本発明を実施例によって具体的に説明
するが、本発明はこれに限定されるものではない。EXAMPLES Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited thereto.
【００１０】実施例１ ステンレス製重合器に、塩化ビニル単量体１００重量
部、脱イオン水１５０重量部、部分鹸化ポリビニルアル
コール０．１重量部、および２−エチルヘキシルパーオ
キシジカーボネート０．０４重量部を仕込み、温度５７
℃で重合を行い重合器内の圧力が６．０ｋｇ／ｃｍ2Ｇ
に達したときに未反応の塩化ビニル単量体を回収し、脱
水して２０重量％の水を含む塩化ビニル重合体ケーキを
得た。こうして得られた重合体ケーキにエチレングリコ
ールを５０％水溶液として重合体に対して０．１重量部
添加した後、７０℃で２時間流動乾燥し塩化ビニル重合
体を得た。Example 1 In a stainless steel polymerization vessel, 100 parts by weight of vinyl chloride monomer, 150 parts by weight of deionized water, 0.1 part by weight of partially saponified polyvinyl alcohol, and 0.04 part by weight of 2-ethylhexyl peroxydicarbonate Parts, temperature 57
C. and the pressure in the polymerization vessel was 6.0 kg / cm 2 G
Was reached, unreacted vinyl chloride monomer was recovered and dehydrated to obtain a vinyl chloride polymer cake containing 20% by weight of water. To the polymer cake thus obtained, ethylene glycol was added as a 50% aqueous solution in an amount of 0.1 part by weight based on the polymer, and then flow-dried at 70 ° C. for 2 hours to obtain a vinyl chloride polymer.
【００１１】実施例２ ステンレス製重合器に、塩化ビニル単量体１００重量
部、脱イオン水１５０重量部、部分鹸化ポリビニルアル
コール０．１重量部、および２−エチルヘキシルパーオ
キシジカーボネート０．０４重量部を仕込み、温度５７
℃で重合を行い重合器内の圧力が６．０ｋｇ／ｃｍ2Ｇ
に達したときに未反応の塩化ビニル単量体を回収し、脱
水した後、７０℃で２時間流動乾燥し塩化ビニル重合体
を得た。得られた塩化ビニル重合体に流動状態下で、エ
チレングリコールを５０％水溶液として重合体に対して
０．１重量部添加した。Example 2 In a stainless steel polymerization vessel, 100 parts by weight of vinyl chloride monomer, 150 parts by weight of deionized water, 0.1 part by weight of partially saponified polyvinyl alcohol, and 0.04 part by weight of 2-ethylhexyl peroxydicarbonate Parts, temperature 57
C. and the pressure in the polymerization vessel was 6.0 kg / cm 2 G
Unreacted vinyl chloride monomer was recovered when the temperature reached, and after dehydration, it was fluid-dried at 70 ° C for 2 hours to obtain a vinyl chloride polymer. Under a fluidized state, 0.1 parts by weight of ethylene glycol was added to the obtained vinyl chloride polymer as a 50% aqueous solution with respect to the polymer.
【００１２】実施例３〜４ 実施例２において、多価アルコールの種類、添加量、水
溶液濃度を表１に示す条件とした以外は、実施例２と同
様にして塩化ビニル重合体を得た。Examples 3 to 4 A vinyl chloride polymer was obtained in the same manner as in Example 2 except that the kind, amount of addition and concentration of the aqueous solution of the polyhydric alcohol were changed to the conditions shown in Table 1.
【００１３】比較例１ 実施例２において、エチレングリコールを添加しない以
外は、実施例１と同様にして塩化ビニル重合体を得た。Comparative Example 1 A vinyl chloride polymer was obtained in the same manner as in Example 2 except that ethylene glycol was not added.
【００１４】比較例２ 実施例１において、エチレングリコールンの代わりにポ
リオキシエチレンソルビタンモノラウレートの５％水溶
液をを用いた以外は、実施例１と同様にして塩化ビニル
重合体を得た。Comparative Example 2 A vinyl chloride polymer was obtained in the same manner as in Example 1, except that a 5% aqueous solution of polyoxyethylene sorbitan monolaurate was used instead of ethylene glycol.
【００１５】上記の実施例１〜３および比較例１〜２で
得られた塩化ビニル重合体について、かさ比重測定試験
および熱安定性試験を行った。その結果を表１に示す。The vinyl chloride polymers obtained in Examples 1 to 3 and Comparative Examples 1 and 2 were subjected to a bulk specific gravity measurement test and a thermal stability test. Table 1 shows the results.
【００１６】１．かさ比重測定試験 塩化ビニル重合体を温度２３℃、相対湿度５０％の恒温
恒湿室内に４８時間放置した後、かさ比重をＪＩＳ Ｋ
−６７２１の方法により測定した。また、上記と同様な
条件で４８時間放置した塩化ビニル重合体を、ブラベン
ダープラネタリーミキサーで６０ｒｐｍ、２分間撹拌
後、上記と同じ方法でかさ比重を比較した。1. Bulk specific gravity measurement test After the vinyl chloride polymer was left in a constant temperature and humidity room at a temperature of 23 ° C and a relative humidity of 50% for 48 hours, the bulk specific gravity was measured according to JIS K.
It measured by the method of -6721. Further, the vinyl chloride polymer left for 48 hours under the same conditions as above was stirred at 60 rpm for 2 minutes with a Brabender planetary mixer, and the bulk specific gravity was compared by the same method as above.
【００１７】２．熱安定性 塩化ビニル重合体１００重量部に対して、 三塩基性硫酸鉛 １．０重量部 ステアリン酸鉛 １．５ 〃 ステアリン酸カルシウム ０．５ 〃 を配合し、１９０℃のロールで５分間混練した後、暑さ
１ｍｍのシートを作成し、このシートを１９０℃のオー
ブンに入れて黒化するまでの時間を測定した。2. Thermal stability 100 parts by weight of vinyl chloride polymer, 1.0 part by weight of tribasic lead sulfate 1.5 parts by weight of lead stearate 0.5% by weight of calcium stearate were mixed and kneaded with a roll at 190 ° C. for 5 minutes. Thereafter, a sheet having a heat of 1 mm was prepared, and the sheet was placed in an oven at 190 ° C., and the time until blackening was measured.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【発明の効果】以上述べたとおり、本発明によれば、嵩
比重の減少が起こりにくく、熱安定性などの特性に優れ
た塩ビ系重合体を得ることができる。As described above, according to the present invention, it is possible to obtain a vinyl chloride polymer which is less likely to decrease in bulk specific gravity and has excellent properties such as thermal stability.
Claims (1)
分とするビニル系単量体の混合物を水性媒体中で懸濁重
合し、塩化ビニル系重合体を製造するに際し、塩化ビニ
ル系重合体を含有するスラリーを脱水した後に、エチレ
ングリコール、プロピレングリコール、ペンタエリスリ
トール及びこれらの多量体並びにグリセリンから選ばれ
る多価アルコールを濃度５〜９０％の水溶液として前記
塩化ビニル系重合体に対して０．００１〜０．５重量部
添加することを特徴とする塩化ビニル系重合体の製造方
法。1. A vinyl chloride polymer or a mixture of vinyl monomers containing vinyl chloride as a main component is subjected to suspension polymerization in an aqueous medium to produce a vinyl chloride polymer. after dewatering the slurry containing, ethylene
Glycol, propylene glycol, pentaerythri
Selected from tolls and their multimers and glycerin
Polyhydric method for producing a vinyl chloride polymer, characterized in that alcohol is added 0.001 to 0.5 parts by weight based on the vinyl chloride polymer as an aqueous solution of concentration 5% to 90% that.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33044392A JP3316891B2 (en) | 1992-12-10 | 1992-12-10 | Method for producing vinyl chloride polymer |
| DE69330421T DE69330421T2 (en) | 1992-12-10 | 1993-12-09 | Process for producing a vinyl chloride type polymer |
| EP93119895A EP0601586B1 (en) | 1992-12-10 | 1993-12-09 | Method of producing vinyl chloride type polymer |
| US08/510,938 US5665836A (en) | 1992-12-10 | 1995-08-03 | Method of preparing vinyl chloride polymers and copolymers of improved antistatic performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33044392A JP3316891B2 (en) | 1992-12-10 | 1992-12-10 | Method for producing vinyl chloride polymer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06172420A JPH06172420A (en) | 1994-06-21 |
| JP3316891B2 true JP3316891B2 (en) | 2002-08-19 |
Family
ID=18232680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33044392A Expired - Fee Related JP3316891B2 (en) | 1992-12-10 | 1992-12-10 | Method for producing vinyl chloride polymer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3316891B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10221268B2 (en) | 2014-03-20 | 2019-03-05 | Mitsubishi Chemical Corporation | Vinyl polymer powder, thermoplastic resin composition, and molded body thereof |
-
1992
- 1992-12-10 JP JP33044392A patent/JP3316891B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06172420A (en) | 1994-06-21 |
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