JPH08257488A - Method for stripping coating film on coated polypropylene bumper - Google Patents
Method for stripping coating film on coated polypropylene bumperInfo
- Publication number
- JPH08257488A JPH08257488A JP9174695A JP9174695A JPH08257488A JP H08257488 A JPH08257488 A JP H08257488A JP 9174695 A JP9174695 A JP 9174695A JP 9174695 A JP9174695 A JP 9174695A JP H08257488 A JPH08257488 A JP H08257488A
- Authority
- JP
- Japan
- Prior art keywords
- parts
- weight
- bumper
- coating film
- surfactant
- 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
-
- 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
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Paints Or Removers (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はプライマー及び上塗り塗
料で塗装されたポリプロピレン製バンパー（ＰＰバンパ
ー）の塗膜剥離方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a coating film from a polypropylene bumper (PP bumper) coated with a primer and a topcoat paint.
【０００２】[0002]
【従来の技術】従来、塗装されたＰＰバンパーの廃車処
理の際に生じるシュレッダーダストは、ほとんどが埋め
立て処分されていた。近年、リサイクル技術開発が進ん
でおり、一部、市場から回収したＰＰバンパーは自動車
部品に再利用されている。ただし、塗膜剥離技術は今の
所十分には進んでおらず、ヤスリ研磨法、高圧水噴射法
等の機械的方法や強アルカリ煮沸法、強酸煮沸法等の化
学的方法が従来から知られている。2. Description of the Related Art Conventionally, most of shredder dust generated when a painted PP bumper is disposed of as a waste car has been disposed of by landfill. In recent years, recycling technology has been developed, and PP bumpers collected from the market are reused for automobile parts. However, the coating film peeling technology has not advanced sufficiently so far, and mechanical methods such as a sanding method and a high-pressure water jet method, and chemical methods such as a strong alkaline boiling method and a strong acid boiling method have been conventionally known. ing.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
強アルカリ煮沸法や強酸煮沸法では、剥離効果が不十分
であり処理能力も低いという欠点を有していた。However, the conventional strong alkaline boiling method and strong acid boiling method have drawbacks in that the stripping effect is insufficient and the processing capacity is low.
【０００４】[0004]
【課題を解決するための手段】本発明者は塗装ＰＰバン
パーの塗膜剥離方法について鋭意研究を重ねた結果、強
アルカリ１００重量部、アルコール系溶剤５〜１００重
量部、界面活性剤０．１〜２０重量部を含有した強アル
カリ剥離剤に浸漬して上塗り塗膜を膨潤、溶解させ、更
に、プライマー塗膜を膨潤させた後、十分に水洗し、強
酸１００重量部、界面活性剤０．１〜２０重量部を含有
した強酸剥離剤に浸漬することによりプライマー塗膜ま
で剥離しうることを見いだし、この知見に基ずいて本発
明を完成した。すなわち、本発明はプライマー及び上塗
り塗料を塗装したＰＰバンパーの塗膜を剥離するに際し
て強アルカリ１００重量部、アルコール系溶剤５〜１０
０重量部、界面活性剤０．１〜２０重量部を含有した強
アルカリ剥離剤に浸漬し、更に強酸１００重量部、界面
活性剤０．１〜２０重量部を含有した強酸剥離剤に浸漬
することを特徴とする塗装ＰＰバンパーの塗膜剥離方法
である。As a result of intensive studies on the method for removing the coating film of a coated PP bumper, the present inventor has found that 100 parts by weight of a strong alkali, 5 to 100 parts by weight of an alcohol solvent, and 0.1% of a surfactant are used. ˜20 parts by weight of a strong alkaline stripping agent to swell and dissolve the top coating film, and further swell the primer coating film, followed by thorough washing with water, 100 parts by weight of a strong acid and 0. It was found that even the primer coating film can be peeled by immersing in a strong acid peeling agent containing 1 to 20 parts by weight, and the present invention was completed based on this finding. That is, the present invention uses 100 parts by weight of a strong alkali and 5 to 10 parts by weight of an alcohol solvent when peeling off the coating film of the PP bumper coated with the primer and the top coating material.
Immersion in a strong alkaline stripping agent containing 0 parts by weight and 0.1 to 20 parts by weight of a surfactant, and further immersion in a strong acid stripping agent containing 100 parts by weight of a strong acid and 0.1 to 20 parts by weight of a surfactant. It is a coating film peeling method of a coated PP bumper characterized by the following.
【０００５】本発明において用いられる強アルカリとし
ては、水酸化ナトリウム、水酸化カリウム等のアルカリ
が用いられるが、特に飽和水酸化ナトリウム水溶液が適
している。強酸としては、硫酸、塩酸等の酸が用いられ
るが、特に濃塩酸が適している。アルコール系溶剤とし
てはメタノール、エタノール、ｎ−プロパノール、イソ
プロパノール等が用いられるが、特にメタノールが望ま
しい。界面活性剤としては、アニオン系界面活性剤、カ
チオン系界面活性剤、両性界面活性剤、非イオン性界面
活性剤共に使用可能である。特に両性界面活性剤、非イ
オン性界面活性剤が望ましい。両面界面活性剤として
は、アミノ酸型両性界面活性剤、ベタイン型両性界面活
性剤が挙げられる。非イオン性界面活性剤としては、ポ
リエチレングリコール型非イオン性界面活性剤、多価ア
ルコール型界面活性剤が挙げられる。また、これらの界
面活性剤はそれぞれ単独で使用しても良いが、数種類混
合して使用することも可能である。本発明の強アルカリ
剥離剤における強アルカリ、アルコール系溶剤、界面活
性剤の含有量としては、強アルカリ１００重量部に対し
てアルコール系溶剤５〜１００重量部、界面活性剤０．
１〜２０重量部が適している。特に、アルコール系溶剤
１０〜３０重量部、界面活性剤０．５〜１５重量部が望
ましい。また、強酸剥離剤における強酸と界面活性剤の
含有量は強酸１００重量部に対して、界面活性剤０．１
〜２０重量部が適しており、特に界面活性剤０．５〜１
５重量部が望ましい。As the strong alkali used in the present invention, alkalis such as sodium hydroxide and potassium hydroxide are used, and saturated sodium hydroxide aqueous solution is particularly suitable. Acids such as sulfuric acid and hydrochloric acid are used as the strong acid, and concentrated hydrochloric acid is particularly suitable. Methanol, ethanol, n-propanol, isopropanol and the like are used as the alcohol solvent, but methanol is particularly preferable. As the surface active agent, an anionic surface active agent, a cationic surface active agent, an amphoteric surface active agent, or a nonionic surface active agent can be used. In particular, amphoteric surfactants and nonionic surfactants are desirable. Examples of the double-sided surfactant include amino acid type amphoteric surfactants and betaine type amphoteric surfactants. Examples of the nonionic surfactant include polyethylene glycol type nonionic surfactants and polyhydric alcohol type surfactants. Further, these surfactants may be used alone, or may be used as a mixture of several kinds. The contents of the strong alkali, the alcohol solvent and the surfactant in the strong alkaline stripping agent of the present invention are 5 to 100 parts by weight of the alcohol solvent and 0.
1 to 20 parts by weight are suitable. Particularly, 10 to 30 parts by weight of alcohol solvent and 0.5 to 15 parts by weight of surfactant are preferable. The content of the strong acid and the surfactant in the strong acid remover is 0.1 parts by weight of the surfactant with respect to 100 parts by weight of the strong acid.
~ 20 parts by weight is suitable, especially 0.5-1 surfactant.
5 parts by weight is desirable.
【０００６】[0006]
【実施例】表１に示す組成配合の本発明実施例と比較例
の各剥離剤を用いて下記のように試験した。結果を表１
に示す。 （試験板作成条件）ポリプロピレン基材にプライマーと
してベポックス＃３０Ｐ（神東塗料（株）製ポリオレフ
ィン系塗料）を５〜10μｍ塗布し、室温で５分間乾燥
後、上塗り塗料としてベポックス＃１０ＴＳ（神東塗料
（株）製ポリウレタン系塗料）を３０〜３５μｍ塗布
し、８０℃×３０分間乾燥した後、3 日間放置した塗装
板を試験板として使用した。 （剥離試験方法）強アルカリ剥離剤に試験板を２時間浸
漬する。試験板を取り出し後十分に水洗する。次に強酸
剥離剤に試験板を２時間浸漬する。試験板を取り出し後
十分に水洗し塗膜の剥離状態を評価した。評価基準は以
下の通りである。 Ａ：上塗り/ プライマー共に剥離 Ｂ：上塗りのみ剥離 Ｃ：効果無しEXAMPLES The release agents of the present invention examples and comparative examples having the compositions shown in Table 1 were tested as follows. The results are shown in Table 1.
Shown in (Test plate preparation conditions) Bepox # 30P (polyolefin paint manufactured by Shinto Paint Co., Ltd.) as a primer was applied to a polypropylene substrate in an amount of 5 to 10 μm, and dried at room temperature for 5 minutes, and then Bepox # 10TS (Kantou Co., Ltd.) was used as an overcoat paint. A polyurethane-based paint manufactured by Paint Co., Ltd. was applied in an amount of 30 to 35 μm, dried at 80 ° C. for 30 minutes, and then left for 3 days to be used as a test plate. (Peeling test method) A test plate is immersed in a strong alkaline peeling agent for 2 hours. After taking out the test plate, wash it thoroughly with water. Then, the test plate is immersed in the strong acid remover for 2 hours. After taking out the test plate, it was thoroughly washed with water and the peeling state of the coating film was evaluated. The evaluation criteria are as follows. A: Peel off both top coat and primer B: Peel off top coat only C: No effect
【０００７】[0007]
【表１】 [Table 1]
【０００８】[0008]
【発明の効果】本発明の方法に従うことにより、塗装さ
れたＰＰバンパーを強アルカリ、アルコール系溶剤と界
面活性剤を含有した強アルカリ剥離剤で上塗り塗膜を膨
潤. 溶解、更に、プライマー塗膜を膨潤させ、次に、強
酸と界面活性剤を含有した強酸剥離剤に浸漬させること
により、プライマー塗膜まで剥離することができた。According to the method of the present invention, the coated PP bumper is swelled with a strong alkali, a strong alkaline release agent containing an alcohol solvent and a surfactant. Was swollen and then immersed in a strong acid remover containing a strong acid and a surfactant, whereby the primer coating film could be removed.
Claims (1)
Ｐバンパーの塗膜を剥離するに際して、強アルカリ１０
０重量部、アルコール系溶剤５〜１００重量部、界面活
性剤０．１〜２０重量部を含有した強アルカリ剥離剤に
浸漬し、更に強酸１００重量部、界面活性剤０．１〜２
０重量部を含有した強酸剥離剤に浸漬することを特徴と
する塗装ＰＰバンパーの塗膜剥離方法。1. A P coated with a primer and a top coating.
When peeling off the P bumper coating, a strong alkali 10
0 parts by weight, 5-100 parts by weight of alcohol solvent, and 0.1-20 parts by weight of a surfactant are immersed in a strong alkaline stripping agent, and further 100 parts by weight of a strong acid and 0.1-2 parts of a surfactant.
A coating film peeling method for a coated PP bumper, which comprises immersing in a strong acid peeling agent containing 0 part by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9174695A JPH08257488A (en) | 1995-03-24 | 1995-03-24 | Method for stripping coating film on coated polypropylene bumper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9174695A JPH08257488A (en) | 1995-03-24 | 1995-03-24 | Method for stripping coating film on coated polypropylene bumper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08257488A true JPH08257488A (en) | 1996-10-08 |
Family
ID=14035106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9174695A Pending JPH08257488A (en) | 1995-03-24 | 1995-03-24 | Method for stripping coating film on coated polypropylene bumper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08257488A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004099993A (en) * | 2002-09-11 | 2004-04-02 | Fujitsu Ltd | Method for removing coating film of coated magnesium alloy member |
| KR101038211B1 (en) * | 2010-10-05 | 2011-06-02 | 남양건설(주) | System and method for rust or paint removal |
| CN102585582A (en) * | 2012-02-24 | 2012-07-18 | 北京泰合源通生物科技有限公司 | Solution and method for stripping protective adhesive layer and printing layer of optical disc |
| JP2013035205A (en) * | 2011-08-08 | 2013-02-21 | Nicca Chemical Co Ltd | Method for manufacturing recycled polypropylene resin formed body |
| JP2013237719A (en) * | 2012-05-11 | 2013-11-28 | Nicca Chemical Co Ltd | Method of producing recycled polypropylene resin molded product |
| US11305309B2 (en) | 2017-10-20 | 2022-04-19 | Yamaguchi Prefectural Industrial Technology Institute | Method and device for removing coating on coated plastic article |
-
1995
- 1995-03-24 JP JP9174695A patent/JPH08257488A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004099993A (en) * | 2002-09-11 | 2004-04-02 | Fujitsu Ltd | Method for removing coating film of coated magnesium alloy member |
| KR101038211B1 (en) * | 2010-10-05 | 2011-06-02 | 남양건설(주) | System and method for rust or paint removal |
| JP2013035205A (en) * | 2011-08-08 | 2013-02-21 | Nicca Chemical Co Ltd | Method for manufacturing recycled polypropylene resin formed body |
| CN102585582A (en) * | 2012-02-24 | 2012-07-18 | 北京泰合源通生物科技有限公司 | Solution and method for stripping protective adhesive layer and printing layer of optical disc |
| JP2013237719A (en) * | 2012-05-11 | 2013-11-28 | Nicca Chemical Co Ltd | Method of producing recycled polypropylene resin molded product |
| US11305309B2 (en) | 2017-10-20 | 2022-04-19 | Yamaguchi Prefectural Industrial Technology Institute | Method and device for removing coating on coated plastic article |
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