JP5008171B2 - 洗浄方法および洗浄剤組成物 - Google Patents
洗浄方法および洗浄剤組成物 Download PDFInfo
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- JP5008171B2 JP5008171B2 JP2006112178A JP2006112178A JP5008171B2 JP 5008171 B2 JP5008171 B2 JP 5008171B2 JP 2006112178 A JP2006112178 A JP 2006112178A JP 2006112178 A JP2006112178 A JP 2006112178A JP 5008171 B2 JP5008171 B2 JP 5008171B2
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- water
- cleaning
- soluble
- cleaning agent
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- 238000004140 cleaning Methods 0.000 title claims description 143
- 238000000034 method Methods 0.000 title claims description 39
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- 238000005406 washing Methods 0.000 claims description 40
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- 230000005484 gravity Effects 0.000 claims description 18
- 229920006395 saturated elastomer Polymers 0.000 claims description 18
- 239000003599 detergent Substances 0.000 claims description 17
- 238000009835 boiling Methods 0.000 claims description 16
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- 150000001298 alcohols Chemical class 0.000 claims description 5
- 150000002576 ketones Chemical class 0.000 claims description 5
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- DLRJIFUOBPOJNS-UHFFFAOYSA-N phenetole Chemical compound CCOC1=CC=CC=C1 DLRJIFUOBPOJNS-UHFFFAOYSA-N 0.000 description 1
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- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
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- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Cleaning By Liquid Or Steam (AREA)
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
(ここで、Coはノルマルヘキサン中の極性有機化合物濃度(重量%)であり、Cwは水相中の極性有機化合物濃度(重量%)である)
また、上記洗浄剤組成物の炭化水素はイソパラフィン、ノルマルパラフィン及びシクロパラフィンから選ばれる1種以上であることが好ましく、水に微溶な極性有機化合物がアルコール類、エーテル類、ケトン類、アルデヒド類、エステル類、多価アルコール類、アミン類及びラクタム類からなる群より選ばれる1種以上であることが好ましい。
(ここで、Coはノルマルヘキサン中の極性有機化合物濃度(重量%)であり、Cwは水相中の極性有機化合物濃度(重量%)である)
本発明に使用する水に微溶な極性有機化合物は、25℃における分配係数Xが5.0以上、より好ましくは10.0以上である。分配係数Xが5.0未満の場合には、後述する洗浄剤と水溶性汚れに同伴される水分とを比重差により分離する工程(B工程)において、極性有機化合物が比重分離された水相へ移行してしまい、洗浄剤中の極性有機化合物の量が低減して洗浄能力が低下するために好ましくない。
(1)極性有機化合物
表1に示す極性有機化合物の分配係数Xと飽和水分量の測定を実施した。分配係数Xの算出は、25℃においてノルマルヘキサン80重量部と極性有機化合物20重量部を混合した組成物に100重量部の蒸留水を添加し、よく振り混ぜた後、1時間静置し、ノルマルヘキサン相と水相に分離した。ノルマルヘキサン相中の極性有機化合物の量をガスクロマトグラフにより定量し、分配係数Xを算出した。結果を表1に示す。また、各極性有機化合物の25℃における飽和水分量も併せて表1に示す。
水溶性切削油(ケミック製ケミクールS−56)を蒸留水で25倍に希釈して4重量%水溶液を調製し、ここで調製した水溶性切削油4重量%水溶液に積層メッシュ板(30mmφ、80メッシュ)を5分間浸漬し、水溶性切削油を付着させ被洗浄物とした。付着量としては概略300mg/個であった。
(3)洗浄試験2
水溶性切削油にケミック製ケミクールS−56を使用して、蒸留水で25倍に希釈した4重量%水溶液を調製し、ここで調製した水溶性切削油4重量%水溶液に積層メッシュ板(30mmφ、80メッシュ)を5分間浸漬し、水溶性切削油を付着させた後、40℃にて60分間乾燥させ、汚れを乾固させて被洗浄物とした。被洗浄物への水溶性切削油の付着量としては約10mg/個であった。洗浄試験は洗浄試験1と同様の方法にて実施した。
(4)洗浄試験3
水溶性切削油に山光油業製トリムマイクロソル165を使用して、蒸留水で25倍に希釈した4重量%水溶液を調製し、ここで調製した水溶性切削油4重量%水溶液に積層メッシュ板(30mmφ、80メッシュ)を5分間浸漬し、水溶性切削油を付着させ、被洗浄物とした。被洗浄物への水溶性切削油水溶液の付着量としては約300mg/個であった。洗浄試験は洗浄試験1と同様の方法にて実施した
(5)洗浄試験4
水溶性切削油に山光油業製トリムマイクロソル165を使用して、蒸留水で25倍に希釈した4重量%水溶液を調製し、ここで調製した水溶性切削油4重量%水溶液に積層メッシュ板(30mmφ、80メッシュ)を5分間浸漬し、水溶性切削油を付着させた後、40℃にて60分間乾燥させ、汚れを乾固させて被洗浄物とした。被洗浄物への水溶性切削油の付着量としては約10mg/個であった。洗浄試験は洗浄試験1と同様の方法にて実施した。
(実施例1)
ノルマルデカン80.0重量部、2−オクタノール20.0重量部、水0.5重量部からなる洗浄剤組成物を調整した。この洗浄剤組成物を用いて、洗浄試験1を行った結果、洗浄後の被洗浄物に付着していた油分量は平均0.3mg/個であり、洗浄は良好に行われた。また、洗浄後の洗浄剤を静置したところ、ビーカー底部に水相が分離した。
(実施例2〜7)
表3に示す割合で各洗浄剤を配合し、実施例1と同様の方法で、洗浄試験1、洗浄試験2、洗浄試験3、洗浄試験4を行った。洗浄後の残油分の評価、及び洗浄後の洗浄剤を静置した際の分離の有無について、表3に併せて示す。
(比較例1)
ノルマルデカン80.0重量部、3−メチル−3−メトキシブタノール20.0重量部、水1.0重量部からなる洗浄剤組成物を調整した。この洗浄剤組成物を用いて、洗浄試験1を行った結果、洗浄後の被洗浄物に付着していた油分量は平均1.0mg/個であり、洗浄不良であった。また、洗浄後の洗浄液を静置したところ、ビーカー底部に水相が分離した。
(比較例2〜5)
表3に示す割合で各洗浄剤を配合し、実施例1と同様の方法で、洗浄試験1、洗浄試験2、洗浄試験3、洗浄試験4を行った。洗浄後の残油分の評価、及び洗浄後の洗浄剤を静置した際の分離の有無について、表3に併せて示す。
Claims (6)
- 水溶性汚れが付着した被洗浄物を洗浄するに当たり、被洗浄物を洗浄剤に浸漬して洗浄する工程(A工程)と、A工程で使用した洗浄剤から、水溶性汚れに同伴された水分を比重差により分離する工程(B工程)を含み、前記洗浄剤が、a)炭化水素、b)次式で表されるノルマルヘキサンと水との間の分配係数Xが5.0以上である水に微溶な極性化合物、およびc)水分からなる洗浄剤であることを特徴とする洗浄方法。
X=Co/Cw
(ここで、Coはノルマルヘキサン中の極性有機化合物濃度(重量%)であり、Cwは水相中の極性有機化合物濃度(重量%)である) - B工程において比重差で分離した洗浄剤を蒸留する工程(C工程)を含み、C工程で蒸留した洗浄剤を再度使用する請求項1に記載の洗浄方法。
- 請求項1又は2記載の洗浄方法に使用する洗浄剤であって、前記a)が沸点130〜350℃の炭化水素80〜20重量%、前記b)が沸点130〜350℃の水に微溶な極性有機化合物20〜80重量%、前記c)水分が洗浄剤組成物の飽和水分量の80〜100%であり、かつ、前記a)及びb)の合計100重量部に対して0.05〜3.0重量部である洗浄剤組成物。
- 前記b)水に微溶な極性有機化合物が、該極性有機化合物の25℃における飽和水分量が0.1重量%以上10.0重量%未満である請求項3記載の洗浄剤組成物。
- 炭化水素がイソパラフィン、ノルマルパラフィン及びシクロパラフィンから選ばれる1種以上である請求項3記載の洗浄剤組成物。
- 水に微溶な極性有機化合物がアルコール類、エーテル類、ケトン類、アルデヒド類、エステル類、多価アルコール類、アミン類、及びラクタム類からなる群より選ばれる1種以上である請求項3又は4いずれかに記載の洗浄剤組成物。
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