JPH0745679B2 - Method for cleaning and removing polymer substances - Google Patents
Method for cleaning and removing polymer substancesInfo
- Publication number
- JPH0745679B2 JPH0745679B2 JP18122586A JP18122586A JPH0745679B2 JP H0745679 B2 JPH0745679 B2 JP H0745679B2 JP 18122586 A JP18122586 A JP 18122586A JP 18122586 A JP18122586 A JP 18122586A JP H0745679 B2 JPH0745679 B2 JP H0745679B2
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- polymer substance
- washing
- acrylonitrile
- cleaning
- 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
Links
- 239000000126 substance Substances 0.000 title claims description 31
- 229920000642 polymer Polymers 0.000 title claims description 30
- 238000000034 method Methods 0.000 title claims description 25
- 238000004140 cleaning Methods 0.000 title description 11
- 239000002904 solvent Substances 0.000 claims description 33
- 238000005406 washing Methods 0.000 claims description 18
- 229920001577 copolymer Polymers 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 11
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 10
- 125000003118 aryl group Chemical group 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 9
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 8
- 229920002554 vinyl polymer Polymers 0.000 claims description 7
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 229910052783 alkali metal Inorganic materials 0.000 claims description 3
- 150000001340 alkali metals Chemical class 0.000 claims description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 3
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- -1 alkyl amides Chemical class 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 2
- 125000005360 alkyl sulfoxide group Chemical group 0.000 description 2
- 238000012662 bulk polymerization Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- AVQQQNCBBIEMEU-UHFFFAOYSA-N 1,1,3,3-tetramethylurea Chemical compound CN(C)C(=O)N(C)C AVQQQNCBBIEMEU-UHFFFAOYSA-N 0.000 description 1
- MFGOFGRYDNHJTA-UHFFFAOYSA-N 2-amino-1-(2-fluorophenyl)ethanol Chemical compound NCC(O)C1=CC=CC=C1F MFGOFGRYDNHJTA-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 1
- 229910001863 barium hydroxide Inorganic materials 0.000 description 1
- HUCVOHYBFXVBRW-UHFFFAOYSA-M caesium hydroxide Inorganic materials [OH-].[Cs+] HUCVOHYBFXVBRW-UHFFFAOYSA-M 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 150000001923 cyclic compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 150000001470 diamides Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- YAMHXTCMCPHKLN-UHFFFAOYSA-N imidazolidin-2-one Chemical compound O=C1NCCN1 YAMHXTCMCPHKLN-UHFFFAOYSA-N 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/70—Maintenance
- B29C33/72—Cleaning
- B29C33/722—Compositions for cleaning moulds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Detergent Compositions (AREA)
- Polymerisation Methods In General (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、芳香族ビニル−アクリロニトリル共重合体の
製造装置または成形装置に付着する高分子物質の洗浄方
法に関する。TECHNICAL FIELD The present invention relates to a method for cleaning a polymer substance attached to an aromatic vinyl-acrylonitrile copolymer production apparatus or a molding apparatus.
一般に、芳香族ビニル−アクリロニトリル共重合体の製
造時もしくは成形時に、その製造装置または成形装置内
に単量体や重合溶媒に不溶性ないし難溶性の高分子物質
が付着することは公知である。It is generally known that, during production or molding of an aromatic vinyl-acrylonitrile copolymer, a polymer substance that is insoluble or hardly soluble in a monomer or a polymerization solvent adheres to the production apparatus or molding apparatus.
この高分子物質は主として反応槽内や伝熱装置などに生
成して、その伝熱性能の低下や配管閉塞を引き起し、反
応制御性の低下や生産性の低下による安定操業の大きな
障害となる。さらには、付着した高分子物質の一部は製
品中にも混入して製品外観や色相の悪化の原因となる。
このため、現状ではしばしば操業を停止して付着した高
分子物質の除去が必要な状況にある。This polymer substance is mainly generated in the reaction tank or in the heat transfer device, which causes the deterioration of the heat transfer performance and the blockage of the pipe, which causes a serious obstacle to stable operation due to the deterioration of the reaction controllability and the productivity. Become. Furthermore, a part of the adhered polymer substance is mixed in the product and causes deterioration of the appearance and hue of the product.
For this reason, at present, it is often necessary to stop the operation and remove the adhered polymer substance.
上記高分子物質の除去方法には、人力による方法もある
が、この方法では多くの人手を要すると供に作業時間が
長くなるのみならず、装置の破損や作業者の残存する化
学物質による汚染などが発生する欠点がある。一方、高
圧流体を用いて付着した高分子物質を剥離除去する方法
もあるが、この方法には装置の構造上高圧流体が直接吹
き付けられない箇所の存在する場合や装置の強度が不足
の場合には適用できない。There is also a method of removing the polymer substance by human power, but this method not only requires a lot of manpower but also increases the working time, and also damages the device and contaminates the operator with chemical substances remaining. There are drawbacks such as occurrence. On the other hand, there is also a method of peeling off the adhered polymer substance using a high-pressure fluid, but this method is used when there is a place where the high-pressure fluid cannot be directly sprayed due to the structure of the equipment or when the strength of the equipment is insufficient. Is not applicable.
上記欠点を解決するため、溶媒による洗浄方法が一般に
行なわれている。しかし、この場合は単量体溶媒では低
温での溶解性が劣り、一方高温になると単量体の重合を
起すので重合体を溶解できる溶媒を使用する必要があ
る。例えば、ジメチルホルムアマイドなどのアルキルア
マイドやジメチルスルホキシドなどのアルキルスルホキ
シドが芳香族ビニル−アクリロニトリル共重合体に対し
て良好な溶媒であることは知られている。しかしなが
ら、これらの溶媒にも架橋もしくは変性された高分子物
質の中には溶解不可能のものがあり、この場合には未溶
解の高分子物質が装置内に残存し、これが核となつて新
たに高分子物質がこれに付着する原因になる。さらに、
完全に溶解除去されなかつた高分子物質は、溶媒、熱な
どの作用によつて変色し、これが製品中に混入すると製
品品質、特に色相の悪化を招来する。In order to solve the above drawbacks, a cleaning method using a solvent is generally performed. However, in this case, the monomer solvent is inferior in solubility at a low temperature, while the monomer solvent is polymerized at a high temperature, so that it is necessary to use a solvent capable of dissolving the polymer. For example, it is known that alkyl amides such as dimethylformamide and alkyl sulfoxides such as dimethyl sulfoxide are good solvents for aromatic vinyl-acrylonitrile copolymers. However, some of these cross-linked or modified polymer substances cannot be dissolved in these solvents, and in this case, undissolved polymer substance remains in the device, which becomes a new nucleus. In addition, it causes high molecular substances to adhere to it. further,
The polymer substance which is not completely dissolved and removed is discolored by the action of a solvent, heat and the like, and when it is mixed in the product, the quality of the product, especially the hue is deteriorated.
一方、特公昭55−8087号公報には、少なくとも50モル％
のアクリロニトリルを含有する高ニトリルビニル系樹脂
製造時のゲル化物を、アルカリ金属及びアルカリ土類金
属などを含有する溶液を用いて溶解除去する方法が開示
されている。しかしながら、この方法はアクリロニトリ
ル含量が比較的低いビニル系樹脂製造時に生成する高分
子物質に適用した場合、その溶解能力の劣ることが判明
している。この低ニトリル含量の芳香族ビニル−アクリ
ロニトリル共重合体の製造時または成形時に装置内に付
着する高分子物質の洗浄方法として特公昭61−848号公
報があるが短時間に除去できる方法とは必らずしも言い
難くいつそうの改良が望まれていた。On the other hand, JP-B-55-8087 discloses that at least 50 mol%
The method of dissolving and removing the gelled product at the time of producing the high nitrile vinyl resin containing acrylonitrile is dissolved and removed using a solution containing an alkali metal, an alkaline earth metal and the like. However, it has been found that this method is inferior in its dissolving ability when it is applied to a polymer substance produced during the production of a vinyl resin having a relatively low acrylonitrile content. Japanese Patent Publication No. Sho 61-848 discloses a method for cleaning a polymer substance that adheres to the inside of an apparatus during the production or molding of this low nitrile content aromatic vinyl-acrylonitrile copolymer, but it is not necessary to remove it in a short time. It was hard to say, and there was a desire for such improvements.
本発明の目的は低ニトリル含量の芳香族ビニル−アクリ
ロニトリル共重合体の製造時または成形時に装置内に付
着する高分子物質を従来法よりも短時間に、容易かつ完
全に洗浄所超する方法を提供することにある。An object of the present invention is to provide a method for easily and completely cleaning a polymer substance adhered in an apparatus at the time of producing or molding an aromatic vinyl-acrylonitrile copolymer having a low nitrile content in a shorter time than a conventional method. To provide.
本発明者らは上記の目的を達成するため種々検討を行な
つた結果特定のジアマイド溶媒とアルカリ性水酸化物を
混用することにより従来法の比較し大巾に短い時間で高
分子物質を洗浄除去する方法を見出し、これに基いて本
発明を完成した。The present inventors have conducted various studies in order to achieve the above-mentioned object, and as a result, by using a specific diamide solvent and an alkaline hydroxide in combination, the polymer substance is removed by washing in a significantly shorter time compared with the conventional method. The present invention has been completed based on the finding method.
即ち本発明は、 芳香族ビニル−アクリロニトリル共重合体であつてその
芳香族ビニル成分をスチレンに換算して５〜33重量％の
アクリロニトリルを含有する共重合体の製造または成形
時に、製造装置または成形装置内に付着する高分子物質
を、＞Ｎ−CO−Ｎ＜の構造を有するジアマイド溶媒に 一般式（Ｉ） Ｍ（OH）ｎ （Ｉ） （式中、ｎは１または２で、ｎ＝１のときはＭはアルカ
リ金属、ｎ＝２のときＭはアルカリ土類金属である） で示される水酸化物の少なくとも一種を1.0×10-4〜1.0
グラム当量／（溶媒）含有せしめてなる洗浄液を用い
て洗浄することを特徴とする高分子物質の洗浄除去方法
である。That is, the present invention relates to an aromatic vinyl-acrylonitrile copolymer, wherein the aromatic vinyl component is converted into styrene and the copolymer containing 5 to 33% by weight of acrylonitrile is produced or molded at the time of production or molding. The polymer substance adhering to the inside of the device is added to a diamide solvent having a structure of> N-CO-N <, and is represented by the general formula (I) M (OH) n (I) (wherein n is 1 or 2, and n = 1 is M is an alkali metal, and when n = 2, M is an alkaline earth metal.) 1.0 × 10 −4 to 1.0
This is a method for washing and removing a polymer substance, which comprises washing with a washing liquid containing gram equivalents / (solvent).
本発明に適用される芳香族ビニル−アクリロニトリル共
重合体は、その芳香族ビニル成分をスチレンに換算して
重合体中にアクリロニトリルを５〜33重量％含有する低
ニトリルビニル系樹脂であつて、アクリロニトリル代り
にメタアクリロニトリルなどのニトリル単量体を含有し
てもよい。芳香族ビニル単量体としてはスチレン、α−
メチルスチレンなどがあげられ、また本共重合体の製造
には、懸濁重合法、溶液重合法、塊状重合法などの方法
が適用可能である。The aromatic vinyl-acrylonitrile copolymer applied to the present invention is a low nitrile vinyl resin containing 5 to 33% by weight of acrylonitrile in the polymer by converting the aromatic vinyl component into styrene. Alternatively, it may contain a nitrile monomer such as methacrylonitrile. Aromatic vinyl monomers include styrene and α-
Examples of the copolymer include methyl styrene and the like, and methods such as a suspension polymerization method, a solution polymerization method, and a bulk polymerization method can be applied to the production of the present copolymer.
本発明に使用されるジアマイド溶媒は の構造を有するもので、鎖式化合物としては、テトラメ
チル尿素など環式化合物としては1,3−ジメチル−２−
イミダゾリジノンなどが挙げられ、特に1,3−ジメチル
−２−イミダゾリジノンが好ましい。The diamide solvent used in the present invention is As a chain compound, a cyclic compound such as tetramethylurea has a structure of 1,3-dimethyl-2-
Examples thereof include imidazolidinone, and particularly 1,3-dimethyl-2-imidazolidinone is preferable.
これらジアマイド化合物を溶媒として使用することによ
り、特公昭61−848号に示されるアルキルアマイドを溶
媒とする従来技術に後述の実施例，比較例で明らかなよ
うに、大巾な改良が可能になつた。By using these diamide compounds as a solvent, it is possible to make a great improvement in the prior art using an alkyl amide as a solvent as disclosed in JP-B-61-848, as will be apparent from the examples and comparative examples described later. It was
上記溶媒には他のアルキルアマイド，アルキルスルホキ
シドが混合されていても良く、これはさらにアクリロニ
トリルがメタアクリロニトリル、スチレン、α−メチル
スチレンなどの単量体、ベンゼン、トルエン、エチルベ
ンゼンなどの芳香族炭化水素またはアセトン、メチルエ
チルケトンなどの他の溶媒を若干含有してもよい。The above-mentioned solvent may be mixed with other alkyl amides and alkyl sulfoxides, in which acrylonitrile is a monomer such as methacrylonitrile, styrene and α-methylstyrene, aromatic hydrocarbon such as benzene, toluene and ethylbenzene. Alternatively, some other solvent such as acetone or methyl ethyl ketone may be contained.
本発明では洗浄液中の含有水分には特に制限はないが水
の含有量が多くなると高分子物質の溶解能力が低下し好
ましくない。特公昭61−848号によれば溶媒に対し0.03
重量％以上の水を必要としているが、本発明ではその必
要がなく、これ以下の量でも洗浄は可能である。In the present invention, the water content in the cleaning liquid is not particularly limited, but if the water content increases, the dissolving ability of the polymer substance decreases, which is not preferable. According to Japanese Examined Patent Publication No. 61-848, 0.03 is added to the solvent.
Although water is required in an amount of not less than wt%, this is not necessary in the present invention and washing can be performed with an amount less than this.
さらに、上記の溶媒に共存させる一般式（Ｉ）で示され
る水酸化物は、具体的には水酸化リチウム、水酸化ナト
リウム、水酸化カリウム、水酸化セシウム、水酸化カル
シウム、水酸化バリウムなどで、その添加量は溶媒容量
に対して通常1.0×10-4〜1.0グラム当量／、好ましく
は１×10-3〜１×10-2グラム当量／である。Further, the hydroxide represented by the general formula (I) to be coexisted in the above-mentioned solvent is specifically lithium hydroxide, sodium hydroxide, potassium hydroxide, cesium hydroxide, calcium hydroxide, barium hydroxide or the like. The addition amount thereof is usually 1.0 × 10 −4 to 1.0 gram equivalents /, preferably 1 × 10 −3 to 1 × 10 −2 gram equivalents /, relative to the solvent volume.
溶媒に水酸化物を含有させる方法には、あらかじめ溶媒
中に水酸化物を添加しておく方法や溶媒による高分子物
質の洗浄操作中に添加する方法例えば、重合装置内に溶
媒を装入後、水酸化物を添加して加温、撹拌する方法な
どがある。The method of adding hydroxide to the solvent includes a method of adding hydroxide to the solvent in advance and a method of adding during the washing operation of the polymer substance with the solvent, for example, after charging the solvent into the polymerization apparatus. , A method of adding hydroxide and heating and stirring.
また、洗浄に当つては前もつて付着した高分子物質の一
部を前述した単量体または適当な溶媒で除去した後に、
本発明による水酸化物を含有する溶媒で洗浄する方法も
行なわれる。In the case of washing, after removing a part of the polymer substance previously attached with the above-mentioned monomer or a suitable solvent,
A method of washing with a solvent containing a hydroxide according to the present invention is also carried out.
本発明の方法によつて高分子物質を洗浄除去する場合の
温度には特に限定はなく、高分子物質の付着場所や使用
する装置に応じて適当に選ぶことができる。しかし、高
分子物質のガラス転位温度付近またはそれ以上の温度を
用いることによつて洗浄効果を一層高めることが可能で
ある。The temperature at which the polymer substance is washed and removed by the method of the present invention is not particularly limited, and can be appropriately selected depending on the place where the polymer substance is attached and the apparatus used. However, it is possible to further enhance the cleaning effect by using a temperature around the glass transition temperature of the polymer material or higher.
以下、実施例および比較例を示して本発明およびその効
果を具体的に説明する。Hereinafter, the present invention and its effects will be specifically described with reference to Examples and Comparative Examples.
実施例１〜４ スチレン−アクリロニトリル共重合体を製造する装置を
用いて、アクリロニトリル含有率の異なるスチレン−ア
クリロニトリル共重合体４種類を各々１カ月間連続塊状
重合法で製造した。一方、この装置には各製造毎に3cm
×3cmのステンレス製の試験片を取付け各試験片へ高分
子物質を付着させた。Examples 1 to 4 Using a device for producing a styrene-acrylonitrile copolymer, four kinds of styrene-acrylonitrile copolymers having different acrylonitrile contents were produced by a continuous bulk polymerization method for one month each. On the other hand, this device has 3 cm for each production.
A 3 cm stainless steel test piece was attached and a polymer substance was attached to each test piece.
次に、これら試験片を容量1000mlのフラスコ内に入れ、
1,3−ジメチル−２−イミダゾリジノン溶媒500mlに、溶
媒当り4.0×10-3グラム当量のNaOHおよび1.0重量％の
水を含む洗浄液を用いて撹拌しながら130℃で洗浄を行
なつた。この試験結果を表１の実施例１〜４に示した。Next, put these test pieces in a flask with a capacity of 1000 ml,
Washing was carried out at 130 ° C. with stirring in 500 ml of 1,3-dimethyl-2-imidazolidinone solvent using a washing solution containing 4.0 × 10 −3 gram equivalents of NaOH and 1.0% by weight of water per solvent. The test results are shown in Examples 1 to 4 in Table 1.
比較例１〜４ 洗浄液として1,3−ジメチル−２−イミダゾリジノン溶
媒の代りにジメチルホルムアマイド溶媒500mlを用いた
以外は実施例１〜４と同様の洗浄試験を行ない試験結果
を表１の比較例１〜４に示した。Comparative Examples 1 to 4 The same cleaning test as in Examples 1 to 4 was performed except that 500 ml of dimethylformamide solvent was used instead of the 1,3-dimethyl-2-imidazolidinone solvent as the cleaning liquid, and the test results are shown in Table 1. The results are shown in Comparative Examples 1 to 4.
実施例５〜10,比較例５〜10 実施例３のアクリロニトリル含有量24重量％のスチレン
−アクリロニトリル共重合体の製造装置内に取付けた、
高分子物質の付着した試験片を実施例１〜４と同じ装置
で、表２に示した12種類の洗浄液を用いて洗浄試験を行
ない、結果を同表に示した。 Examples 5 to 10, Comparative Examples 5 to 10 Installed in an apparatus for producing a styrene-acrylonitrile copolymer having an acrylonitrile content of 24% by weight of Example 3,
The test piece to which the polymer substance was attached was subjected to a washing test using the same apparatus as in Examples 1 to 4 using the 12 types of washing solutions shown in Table 2, and the results are shown in the same table.
〔発明の効果〕 以上のように、本発明によるジアマイド溶媒にアルカリ
性水酸化物を含有せしめた洗浄液を用いて芳香族ビニル
−アクリロニトリル共重合体の製造時または成形時に装
置に付着する高分子物質を洗浄除去する場合は、従来の
溶媒洗浄法と比較して、より短時間で完全に近い洗浄除
去が可能になる。すなわち、高分子物質の除去のための
所要作業時間およびその頻度が減少すると共に、不完全
な洗浄で除去されずに装置内に残存する高分子物質に起
因する製品品質の悪化も大幅に減少して、その効果は絶
大である。 [Effects of the Invention] As described above, the polymeric substance that adheres to the apparatus during the production or molding of the aromatic vinyl-acrylonitrile copolymer using the cleaning liquid containing the alkaline hydroxide in the diamide solvent according to the present invention is used. In the case of washing and removing, as compared with the conventional solvent washing method, almost perfect washing and removal can be performed in a shorter time. That is, the work time and the frequency for removing the polymer substance are reduced, and the deterioration of the product quality due to the polymer substance remaining in the device without being removed by the incomplete cleaning is also significantly reduced. The effect is enormous.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｆ 220/44 ＭＭＸ 7242−4Ｊ Ｃ１１Ｄ 7/06 // Ｂ２９Ｃ 33/56 8823−4Ｆ Ｃ０８Ｊ 11/08 7310−4Ｆ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location C08F 220/44 MMX 7242-4J C11D 7/06 // B29C 33/56 8823-4F C08J 11/08 7310-4F
Claims (1)
であつてその芳香族ビニル成分をスチレンに換算して５
〜33重量％のアクリロニトリルを含有する共重合体の製
造または成形時に、製造装置または成形装置内に付着す
る高分子物質を、＞Ｎ−CO−Ｎ＜の構造を有するジアマ
イド溶媒に 一般式（Ｉ） Ｍ（OH）ｎ （Ｉ） （式中、ｎは１または２で、ｎ＝１のときはＭはアルカ
リ金属、ｎ＝２のときＭはアルカリ土類金属である） で示される水酸化物の少なくとも一種を1.0×10-4〜1.0
グラム当量／（溶媒）含有せしめてなる洗浄液を用い
て洗浄することを特徴とする高分子物質の洗浄除去方
法。1. An aromatic vinyl-acrylonitrile copolymer, wherein the aromatic vinyl component is converted to styrene to obtain 5
During the production or molding of a copolymer containing ~ 33% by weight of acrylonitrile, the polymer substance deposited in the manufacturing apparatus or the molding apparatus is added to a diamide solvent having a structure of> N-CO-N <by the general formula (I ) M (OH) n (I) (wherein n is 1 or 2, when n = 1, M is an alkali metal, and when n = 2, M is an alkaline earth metal) At least one type of object 1.0 × 10 -4 ~ 1.0
A method for washing and removing a polymer substance, which comprises washing with a washing liquid containing gram equivalents / (solvent).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18122586A JPH0745679B2 (en) | 1986-08-02 | 1986-08-02 | Method for cleaning and removing polymer substances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18122586A JPH0745679B2 (en) | 1986-08-02 | 1986-08-02 | Method for cleaning and removing polymer substances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6339995A JPS6339995A (en) | 1988-02-20 |
| JPH0745679B2 true JPH0745679B2 (en) | 1995-05-17 |
Family
ID=16096999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18122586A Expired - Fee Related JPH0745679B2 (en) | 1986-08-02 | 1986-08-02 | Method for cleaning and removing polymer substances |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745679B2 (en) |
-
1986
- 1986-08-02 JP JP18122586A patent/JPH0745679B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6339995A (en) | 1988-02-20 |
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