JPH05178976A - Method for treating molded polymer article - Google Patents
Method for treating molded polymer articleInfo
- Publication number
- JPH05178976A JPH05178976A JP36157991A JP36157991A JPH05178976A JP H05178976 A JPH05178976 A JP H05178976A JP 36157991 A JP36157991 A JP 36157991A JP 36157991 A JP36157991 A JP 36157991A JP H05178976 A JPH05178976 A JP H05178976A
- Authority
- JP
- Japan
- Prior art keywords
- polymer
- group
- carboxyl group
- molded article
- amino group
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/14—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with steam or water
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、廃棄物となるポリマー
成形品の処理方法に関する。更に詳しくは、ポリマー成
形品の分子量を低下させ、同時に形態を崩壊させること
により、ポリマー成形品の廃棄処理または再利用を便な
らしめるポリマー成形品の処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a polymer molded article which is a waste. More specifically, the present invention relates to a method for treating a polymer molded article, which reduces the molecular weight of the polymer molded article and at the same time disintegrates the morphology, thereby facilitating disposal or reuse of the polymer molded article.
【０００２】[0002]
【従来の技術】従来、主としてカルボキシル基と水酸
基、カルボキシル基とアミノ基、またはアルデヒド基と
アミノ基を縮重合させるか、またはこれらの基が環状に
縮合した化合物を開環重合させることによって合成され
たポリマーの成形品について、廃棄処理または再利用を
容易ならしめるような該成形品の簡易な処理方法は提案
されていなかった。ポリエステル化合物の処理法とし
て、リパーゼによる加水分解法が提案されていたが、リ
パーゼのような酵素剤は高価であると同時に反応時間が
長く、また分解されないポリエステルも多く存在し、こ
のためポリエステル成形品の廃棄処理、または再利用の
ための処理方法としては満足できるものではなかった。2. Description of the Related Art Conventionally, it has been mainly synthesized by subjecting a carboxyl group and a hydroxyl group, a carboxyl group and an amino group, or an aldehyde group and an amino group to polycondensation, or ring-opening polymerization of a compound in which these groups are condensed in a ring. Regarding a polymer molded article, a simple method for treating the molded article so as to facilitate disposal or reuse has not been proposed. As a method for treating a polyester compound, a hydrolysis method using lipase has been proposed, but an enzymatic agent such as lipase is expensive, has a long reaction time, and there are many polyesters which are not decomposed. Was not satisfactory as a disposal method for waste disposal or reuse.
【０００３】またポリマー成形品を強熱下に熱分解する
処理方法は多数提案されてきたが、いずれも大がかりな
装置を必要とし、ポリマー成形品の処理方法としては不
十分なものであった。Although many treatment methods for thermally decomposing polymer molded articles under strong heat have been proposed, all of them require a large-scale apparatus and are insufficient as a method for treating polymer molded articles.
【０００４】[0004]
【発明が解決しようとする課題】ポリマー成形品は、通
常容器等の内部に空間を有する形状に成形されているた
め、大きな容積を占め、使用後においても保管および輸
送の効率が悪かった。これを解決するため、機械的な力
によってポリマー成形品を破砕し、小さな空間に縮小す
る方法も提案されているが、簡便にポリマー成形品を粉
砕する装置がないため、現実には効率の悪い保管、輸送
を実施せざるを得なかった。Since a polymer molded article is usually molded into a shape having a space inside a container or the like, it occupies a large volume and is inefficient in storage and transportation even after use. In order to solve this, a method of crushing the polymer molded product by mechanical force and reducing it to a small space has also been proposed, but in reality there is no device for crushing the polymer molded product, so it is actually inefficient. I had no choice but to carry out storage and transportation.
【０００５】主としてカルボキシル基と水酸基、カルボ
キシル基とアミノ基、またはアルデヒド基とアミノ基を
縮重合させるか、またはこれらの基が環状に縮合した化
合物を開環重合させることによって合成されたポリマー
の一部は、生分解性のあることが知られている。このた
め、これらのポリマーを埋め立て用に使用すると、微生
物によって分解され、消滅する場合がある。しかし多く
の場合、そのままでは分解せず、分解する場合でも、分
解消滅には長い年月を必要とするため、膨大な面積の埋
め立て地が必要である。One of polymers synthesized by subjecting a carboxyl group and a hydroxyl group, a carboxyl group and an amino group, or an aldehyde group and an amino group to polycondensation, or ring-opening polymerization of a compound in which these groups are condensed into a ring. The part is known to be biodegradable. Therefore, when these polymers are used for landfill, they may be decomposed by microorganisms and disappear. However, in many cases, it does not decompose as it is, and even if it decomposes, it takes a long time to decompose and disappear, so a huge landfill is required.
【０００６】上記ポリマー成形品は、使用後の廃棄物を
焼却処分しようとすると、固形成形品のままでは局部的
に大量の酸素を必要とする。このため、通常の焼却炉で
固形成形品を燃焼させると、不完全燃焼となり、すすや
固まりで残ってしまう場合が多い。The above-mentioned polymer molded product locally requires a large amount of oxygen when the waste product after use is to be incinerated and disposed of as a solid molded product. For this reason, when a solid molded product is burned in an ordinary incinerator, incomplete combustion often occurs, and soot and solid residue often remain.
【０００７】また上記ポリマー成形品の一部は、加熱融
解し、あらたな成形品の原料として回収使用できる。し
かし熱硬化性であるため、回収使用できないものも多
い。本発明は、上記ポリマー成形品を、簡便な方法で回
収使用できる方法の提供を目的とする。Further, a part of the polymer molded product can be melted by heating and recovered and used as a raw material for a new molded product. However, since they are thermosetting, many of them cannot be recovered and used. An object of the present invention is to provide a method capable of collecting and using the above-mentioned polymer molded product in a simple method.
【０００８】[0008]
【課題を解決するための手段】本発明は、カルボキシル
基と水酸基、カルボキシル基とアミノ基、またはアルデ
ヒド基とアミノ基を縮重合させるか、またはこれらの基
が環状に縮合した化合物を開環重合させることによって
合成されたポリマーの成形品を、水分の存在下で１００
℃以上、１気圧以上、好ましくは１２０℃以上、２気圧
以上に加熱加圧して該成形品を加水分解させることを特
徴とするポリマー成形品の処理方法を提供する。The present invention is directed to ring-opening polymerization of a compound in which a carboxyl group and a hydroxyl group, a carboxyl group and an amino group, an aldehyde group and an amino group are polycondensed, or a compound in which these groups are cyclically condensed. The molded article of the polymer synthesized by
Provided is a method for treating a polymer molded article, which comprises subjecting the molded article to hydrolysis by heating and pressurizing at a temperature of at least ℃ and at least 1 atm, preferably at least 120 ° C and at least 2 atm.
【０００９】即ち本発明は、上記ポリマー成形品を、好
ましくは空気接触による酸化を防止できる密閉容器中
で、高温、高圧の水蒸気と接触させると、上記ポリマー
は加水分解し、低分子量化してペースト状あるいは粉末
状となることを見いだして完成された。That is, according to the present invention, when the above-mentioned polymer molded product is brought into contact with steam at high temperature and high pressure, preferably in a closed container capable of preventing oxidation by air contact, the polymer is hydrolyzed to have a low molecular weight and paste. It was completed by discovering that it will be in the form of powder or powder.
【００１０】本発明において、カルボキシル基と水酸
基、カルボキシル基とアミノ基、またはアルデヒド基と
アミノ基を縮重合させるか、またはこれらの基が環状に
縮合した化合物を開環重合させることによって合成され
たポリマーを例示すると次の通りである。In the present invention, it was synthesized by polycondensing a carboxyl group and a hydroxyl group, a carboxyl group and an amino group, or an aldehyde group and an amino group, or by ring-opening polymerization of a compound in which these groups are condensed in a ring. Examples of the polymer are as follows.
【００１１】カルボキシル基と水酸基を有する化合物、
またはこれらの基が環状に縮合した化合物から得られた
ポリマーとしては、ポリカプロラクトン、ポリヒドロキ
シバレリン酸、ポリヒドロキシ酪酸−ヒドロキシバレリ
ン酸共重合体、ポリエチレングリコールマレート等が挙
げられる。A compound having a carboxyl group and a hydroxyl group,
Alternatively, examples of the polymer obtained from the compound in which these groups are cyclically condensed include polycaprolactone, polyhydroxyvaleric acid, polyhydroxybutyric acid-hydroxyvaleric acid copolymer, polyethylene glycol malate and the like.
【００１２】カルボキシル基とアミノ基を有する化合
物、またはこれらの基が環状に縮合した化合物から得ら
れたポリマーとしては、ポリエチレンジアミンマレー
ト、ポリアラニン等が挙げられる。Examples of the polymer obtained from a compound having a carboxyl group and an amino group or a compound obtained by cyclically condensing these groups include polyethylenediamine maleate and polyalanine.
【００１３】アルデヒド基とアミノ基を有する化合物、
またはこれらの基が環状に縮合した化合物から得られた
ポリマーとしては、ウレア樹脂、ポリアミノブチラール
等が挙げられる。A compound having an aldehyde group and an amino group,
Alternatively, examples of the polymer obtained from the compound in which these groups are condensed in a cyclic manner include urea resin and polyaminobutyral.
【００１４】以下本発明を実施例に基づきより詳細に説
明する。 実施例１〜２、比較例１ 試料１（実施例１）： 幅３ｍｍ、長さ５ｍｍ、厚さ２
ｍｍに破砕したウレア樹脂 試料２（実施例２）： 直径４ｍｍ、長さ３ｍｍのペレ
ット状に成形したポリヒドロキシ酪酸−ヒドロキシバレ
リン酸共重合体 試料３（比較例１）： 直径３ｍｍ、長さ４ｍｍのペレ
ット状に成形したポリプロピレンHereinafter, the present invention will be described in more detail based on examples. Examples 1-2, Comparative Example 1 Sample 1 (Example 1): width 3 mm, length 5 mm, thickness 2
Urea resin crushed to mm Sample 2 (Example 2): Polyhydroxybutyric acid-hydroxyvaleric acid copolymer molded into pellets having a diameter of 4 mm and a length of 3 mm Sample 3 (Comparative Example 1): Diameter 3 mm, length 4 mm Polypropylene molded into pellets
【００１５】試料１〜３をそれぞれ反応用オートクレー
ブに入れ、１８０℃、１１気圧の水蒸気と１時間接触さ
せた。その結果、試料１のウレア樹脂は、ゴムのように
柔軟となり、形状は崩壊していた。試料２のポリヒドロ
キシ酪酸−ヒドロキシバレリン酸共重合体は、形状が崩
れかかっていた。さらに両試料とも指でつまむだけで容
易に粉末になった。試料３のポリプロピレンは、加熱中
に融解し、形状は変化したものの、冷却後堅い塊とな
り、崩壊は認められなかった。Each of Samples 1 to 3 was placed in a reaction autoclave and contacted with steam at 180 ° C. and 11 atm for 1 hour. As a result, the urea resin of Sample 1 became soft like rubber and the shape was collapsed. The shape of the polyhydroxybutyric acid-hydroxyvaleric acid copolymer of Sample 2 was about to collapse. Furthermore, both samples were easily powdered by pinching them with fingers. The polypropylene of Sample 3 melted during heating and changed its shape, but became a solid mass after cooling, and no disintegration was observed.
【００１６】実施例３ 試料として直径３ｍｍ、長さ４ｍｍのペレット状に成形
した重量平均分子量約６万のポリカプロラクトンを用
い、温度の相違による水蒸気加水分解の程度を調べた。Example 3 As a sample, polycaprolactone having a weight average molecular weight of about 60,000, which was formed into a pellet shape having a diameter of 3 mm and a length of 4 mm, was used to examine the degree of steam hydrolysis depending on the difference in temperature.
【００１７】試験管に入れた試料を反応用オートクレー
ブに入れ、それぞれ１２０℃、２気圧、１４０℃、３気
圧、１６０℃、６気圧および１８０℃、１１気圧の水蒸
気と１時間接触させた。処理後各試料の形状を観察する
と共に、テトラヒドロフラン（ＴＨＦ）に溶解してゲル
パーミエイションクロマトグラフィー（ＧＰＣ）により
平均分子量を調べた。The sample placed in the test tube was placed in a reaction autoclave and was contacted with steam at 120 ° C., 2 atm, 140 ° C., 3 atm, 160 ° C., 6 atm and 180 ° C., 11 atm for 1 hour. After the treatment, the shape of each sample was observed, and the sample was dissolved in tetrahydrofuran (THF) to examine the average molecular weight by gel permeation chromatography (GPC).
【００１８】水蒸気処理した試料は、いずれも形状が崩
壊していた。１６０℃、１８０℃で処理した試料は指で
押すと容易に粉末となった。１２０℃、１４０℃で処理
した試料は、１６０℃、１８０℃で処理した試料よりも
若干強い力で指で押すと粉末になった。図１にポリカプ
ロラクトンの平均分子量の測定結果を示す。温度が高い
程平均分子量は低くなっている。The shapes of all the steam-treated samples had collapsed. The samples treated at 160 ° C. and 180 ° C. easily became powders when pressed with a finger. The samples treated at 120 ° C and 140 ° C became powders when pressed with a finger with a slightly stronger force than the samples treated at 160 ° C and 180 ° C. FIG. 1 shows the measurement results of the average molecular weight of polycaprolactone. The higher the temperature, the lower the average molecular weight.
【００１９】実施例４ 試料として直径３ｍｍ、長さ４ｍｍのペレット状に成形
した重量平均分子量約６万のポリカプロラクトンを用
い、処理時間の相違による水蒸気加水分解の程度を調べ
た。試料をそれぞれ８本の試験管に入れ、その内４本を
１２０℃のオートクレーブで、他の４本を１４０℃のオ
ートクレーブでそれぞれ１５分間、３０分間、６０分
間、９０分間水蒸気と接触させた。処理後各試料をＴＨ
Ｆに溶解し、ＧＰＣにより平均分子量を測定した。測定
結果を図２に示す。接触時間が長い程平均分子量は低下
している。Example 4 As a sample, polycaprolactone having a weight average molecular weight of about 60,000 formed into a pellet having a diameter of 3 mm and a length of 4 mm was used, and the degree of steam hydrolysis due to the difference in treatment time was examined. Each of the samples was placed in eight test tubes, four of which were contacted with steam at 120 ° C. and the other four were contacted with steam at 140 ° C. for 15 minutes, 30 minutes, 60 minutes, and 90 minutes, respectively. After processing, each sample is TH
It was dissolved in F and the average molecular weight was measured by GPC. The measurement results are shown in FIG. The longer the contact time, the lower the average molecular weight.
【００２０】[0020]
【発明の効果】本発明の方法によれば、ポリマー成形品
は粉末状となり、成形品に比して容積が大幅に減少する
ので、効率的な保管、輸送が達成される。さらに本発明
の方法によれば、少ない手間とエネルギーで粉末状とす
ることができるので、焼却処分する際に、一定の火力で
燃焼させることができる。また埋め立て用に使用した際
にも、短い時間で埋め立て地が安定化される。本発明の
方法によれば、粉末状化したポリマーを、再度合成原料
として利用する道が開かれる。さらには、病原性のある
微生物、ビールス等を含む血液等が付着するおそれのあ
る医療廃棄物を、別途滅菌処理を実施することなく処理
できるので、廃棄物の発生源における処理が容易とな
る。EFFECTS OF THE INVENTION According to the method of the present invention, the polymer molded product becomes powdery, and the volume thereof is greatly reduced as compared with the molded product, so that efficient storage and transportation can be achieved. Furthermore, according to the method of the present invention, the powder can be made into powder with a small amount of labor and energy, and therefore, it can be burned with a constant thermal power when incinerated. Also, when used for landfill, the landfill is stabilized in a short time. According to the method of the present invention, a way to reuse the powdered polymer as a synthetic raw material is opened. Furthermore, since medical wastes to which blood or the like containing pathogenic microorganisms, viruses and the like may adhere can be treated without separately performing sterilization treatment, treatment at the waste generation source becomes easy.
【図１】ポリカプロラクトンの処理温度と分子量低下の
関係を示すグラフである。FIG. 1 is a graph showing the relationship between the treatment temperature of polycaprolactone and the decrease in molecular weight.
【図２】ポリカプロラクトンの処理時間と分子量低下の
関係を示すグラフである。FIG. 2 is a graph showing the relationship between the treatment time of polycaprolactone and the decrease in molecular weight.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岡林 淳 東京都中央区京橋２丁目３番13号 東洋イ ンキ製造株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Atsushi Okabayashi 2-33 Kyobashi, Chuo-ku, Tokyo Toyo Inki Manufacturing Co., Ltd.
Claims (2)
基とアミノ基、またはアルデヒド基とアミノ基を縮重合
させるか、またはこれらの基が環状に縮合した化合物を
開環重合させることによって合成されたポリマーの成形
品を、水分の存在下で１００℃以上、１気圧以上に加熱
加圧して該成形品を加水分解させることを特徴とするポ
リマー成形品の処理方法。1. A polymer synthesized by condensation polymerization of a carboxyl group and a hydroxyl group, a carboxyl group and an amino group, or an aldehyde group and an amino group, or a ring-opening polymerization of a compound in which these groups are condensed in a ring form. A method for treating a polymer molded article, which comprises heating and pressing the molded article to 100 ° C. or higher and 1 atm or higher in the presence of water to hydrolyze the molded article.
り、分子中にカルボキシル基と水酸基を有するモノマ
ー、またはその環状エステル化物から得られるポリマー
であることを特徴とする請求項１記載のポリマー成形品
の処理方法。2. The polymer according to claim 1, wherein the polymer is a polymer mainly having 2 to 6 carbon atoms and having a carboxyl group and a hydroxyl group in the molecule, or a cyclic esterified product thereof. Processing method of molded products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36157991A JPH05178976A (en) | 1991-12-27 | 1991-12-27 | Method for treating molded polymer article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36157991A JPH05178976A (en) | 1991-12-27 | 1991-12-27 | Method for treating molded polymer article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05178976A true JPH05178976A (en) | 1993-07-20 |
Family
ID=18474148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36157991A Pending JPH05178976A (en) | 1991-12-27 | 1991-12-27 | Method for treating molded polymer article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05178976A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005060687A (en) * | 2003-07-29 | 2005-03-10 | Cci Corp | Method for processing polymer molded article, recycled raw material for polymer and polymer molded article using the same |
| JP2005330211A (en) * | 2004-05-19 | 2005-12-02 | Toyohashi Univ Of Technology | Method for hydrolyzing biodegradable polyester into monomer, and apparatus for treating biodegradable polyester |
| JP2007277389A (en) * | 2006-04-06 | 2007-10-25 | Keisuke Akamatsu | Recovery process of plastic waste by type |
-
1991
- 1991-12-27 JP JP36157991A patent/JPH05178976A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005060687A (en) * | 2003-07-29 | 2005-03-10 | Cci Corp | Method for processing polymer molded article, recycled raw material for polymer and polymer molded article using the same |
| JP4501577B2 (en) * | 2003-07-29 | 2010-07-14 | シーシーアイ株式会社 | Method for producing recycled polymer molding |
| JP2005330211A (en) * | 2004-05-19 | 2005-12-02 | Toyohashi Univ Of Technology | Method for hydrolyzing biodegradable polyester into monomer, and apparatus for treating biodegradable polyester |
| JP2007277389A (en) * | 2006-04-06 | 2007-10-25 | Keisuke Akamatsu | Recovery process of plastic waste by type |
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