[특허]Water-based paint-removing solution

Henkel KGaA

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특허 상세정보

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Water-based paint-removing solution

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C11D-007/50
미국특허분류(USC)	510/201; 134/038; 510/212
출원번호	US-0088466 (2005-03-24)
등록번호	US-7452852 (2008-11-18)
발명자 / 주소	Wilson,Neil R.
출원인 / 주소	Henkel KGaA
대리인 / 주소	Cameron,Mary K.
인용정보	피인용 횟수 : 1 인용 특허 : 24

초록

Paint residues may be removed from spraying equipment and the like by flushing with aqueous compositions containing alkoxylated aromatic alcohols wherein the aromatic ring moieties of such alcohols do not bear any alkyl substituent containing more than 4 carbon atoms. Preferably, the aqueous compositions also contain an alkanolamine or other base. The alkoxylated aromatic alcohols contain an average of at least about 2 oxyalkylene moieties (preferably, oxyethylene moieties) per molecule.

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What is claimed is: 1. A process of removing paint from a non-water-soluble surface comprising contacting said paint on said surface with a composition comprised of water and a water-soluble alkoxylated aromatic alcohol containing at least two oxyalkylene moieties and an aromatic ring moiety which does not bear any alkyl substituent having more than 4 carbon atoms; and a water-soluble base comprising an alkali metal silicate in an amount of about 0.001 to about 0.1 weight percent of the composition. 2. The process of claim 1 wherein the composition is additionally comprised of an alkanolamine. 3. The process of claim 2 wherein the alkanolamine is selected from the group consisting of monoisopropanolamine, dimethylethanolamine, diethanolamine, triethanolamine, triisopropanolamine, monoethanolamine, n-butyl diethanolamine, 2-methylaminoethanol, n-butylaminoethanol, diethylaminoethanol, 2-amino-2-methyl-1-propanol, phenyl diethanolamine. and diisopropanolamine. 4. The process of claim 1 wherein said water-soluble alkoxylated aromatic alcohol is selected from the group consisting of ethoxylated phenols, ethoxylated benzyl alcohols, and mixtures thereof. 5. The process of claim 1 wherein said water-soluble alkoxylated aromatic alcohol contains from 2 to 10 oxyethylene moieties per molecule. 6. The process of claim 1 wherein said composition comprises from about 0.5 to about 30 weight percent of said water-soluble alkoxylated aromatic alcohol. 7. The process of claim 1 wherein said water-soluble alkoxylated aromatic alcohol is a mixture of compounds corresponding to the general structure wherein m represents a positive integer which is from about 2 to about 10 on average for the mixture, each of R1-R4, independently for each and independently from one to another of the m instances of each R1-R4 in the same molecule, represents either a covalently bonded hydrogen atom or a covalently bonded methyl moiety, subject to the proviso that at least about 80 number % of the moieties indicated by the symbols R1-R4 in said mixture represent hydrogen atoms, Ar is a substituted or unsubstituted phenyl moiety, subject to the proviso that Ar contains no alkyl substituent containing more than 2 carbon atoms, R5 is selected from hydrogen or methyl, and p is 0 or 1. 8. A process of flushing paint from a non-water-soluble surface comprising contacting said paint on said surface with a composition comprised of: a) water; b) water-soluble ethoxylated aromatic alcohol selected from the group consisting of ethoxylated phenols, ethoxylated benzyl alcohols, and mixtures thereof, wherein said ethoxylated aromatic alcohol contains an aromatic ring moiety and an average of from about 2 to about 10 oxyethylene moieties per molecule but does not contain any alkyl substituent having more than 2 carbons on said aromatic ring moiety; and c) water-soluble alkanolamine in an amount sufficient to provide a pH of 8-14. 9. The process of claim 8 wherein said composition is additionally comprised of an alkali metal silicate. 10. The process of claim 8 wherein said composition is comprised of from about 10 to about 20 weight percent of water-soluble ethoxylated aromatic alcohol and from about 0.1 to about 2 weight percent water-soluble alkanolamine. 11. The process of claim 8 wherein water-soluble ethoxylated aromatic alcohol and water-soluble alkanolamine are present in said composition at a ratio by weight of from about 2:1 to about 30:1. 12. The process of claim 8 wherein said non-water-soluble surface is a surface of a component of paint spraying equipment and said contacting is accomplished by circulating said composition through said component. 13. The process of claim 8 wherein said paint is uncured water-borne paint. 14. A process of flushing uncured water-borne paint from a non-water soluble surface of a component of paint spraying equipment comprising circulating a composition through said component to contact said uncured water-borne paint on said non-water-soluble surface, said composition comprising: a) water; b) from about 1.0 to about 20 weight percent of water-soluble aromatic alcohol selected from the group consisting of ethoxylated unsubstituted phenols, ethoxylated unsubstituted benzyl alcohols and mixtures thereof, wherein said ethoxylated aromatic alcohol contains an average of from about 3 to about 10 oxyethylene moieties per molecule; c) from about 0.1 to about 2 weight percent of water-soluble alkanolamine; wherein (b) and (c) are present in said composition in a weight ratio of from about 4:1 to about 20:1. 15. The process of claim 14 wherein said composition is additionally comprised of at least one additional component selected from the group consisting of surfactants, solvents, chelating agents and corrosion inhibitors. 16. The process of claim 14 wherein said composition is additionally comprised of from about 0.001 to about 0.1 weight percent alkali metal silicate. 17. A process of removing paint from a non-water-soluble surface comprising contacting said paint on said surface with a composition comprised of water and a water-soluble alkoxylated aromatic alcohol containing at least two oxyalkylene moieties and an aromatic ring moiety which does not bear any alkyl substituent having more than 4 carbon atoms, wherein said water-soluble alkoxylated aromatic alcohol is a mixture of compounds corresponding to the general structure wherein m represents a positive integer which is from about 3 to about 10 on average for the mixture, each of R1-R4, independently for each and independently from one to another of the m instances of each R1-R4 in the same molecule, represents either a covalently bonded hydrogen atom or a covalently bonded methyl moiety, subject to the proviso that at least about 80 number % of the moieties indicated by the symbols R1-R4 in said mixture represent hydrogen atoms, Ar is a substituted or unsubstituted phenyl moiety, subject to the proviso that Ar contains no alkyl substituent containing more than 2 carbon atoms, R5 is selected from hydrogen or methyl, and p is 0 or 1. 18. A process of removing paint from a non-water-soluble surface comprising: a) heating to a temperature of from about 38�� C. to about 54�� C. a composition comprised of water and a water-soluble alkoxylated benzyl alcohol containing at least two oxyalkylene moieties and an aromatic ring moiety which does not bear any alkyl substituent having more than 4 carbon atoms; and b) after step a). contacting said paint on said surface with the composition.

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이 특허를 인용한 특허 피인용횟수: 1

McKay, Jennifer; Cox, Charles K.; Wilson, Neil R.. Flushing solutions for coatings removal. USP2010047699940.

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Water-based paint-removing solution

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Water-based paint-removing solution

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