Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1997-10-28
1999-11-16
Geist, Gary
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
554223, 554224, 252162, 252170, 252364, 106311, 134 38, C09D 900
Patent
active
059858125
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to the new use of at least one lower alkyl ester of a fatty acid for the cleaning of paint brushes from wet or dry paint and/or for the removal of paint from painted surfaces.
In cleaning of brushes which have been used for painting with paints on non-aqueous basis white spirit is primarily used today which exhibits a number of known disadvantages from environmental and health point of view. Accordingly it is a long existing desire to be able to replace white spirit in cleaning of paint brushes with a cleaning liquid which is considerably more lenient from environmental and health point of view.
For the removal of paint from painted surfaces there are also used compositions which are less desirable from environmental as well as health point of view and the handling of which requires great care. Also in this case there is a long existing desire to be able to replace these compositions with an agent which is considerably more lenient from environmental and health point of view.
SUMMARY OF THE INVENTION
According to the present invention it was now surprisingly found that lower alkyl esters of fatty esters, which when compared with white spirits are considerably less toxic and more lenient to skin and environment than white spirit and paint removers found in the market, are fully comparable to white spirit as regards dissolving wet paint from a paint brush and more effective than white spirit as regards dissolving dried paint from a paint brush and in addition are effective as paint removers.
In accordance with the above, the present invention relates to the use of at least one lower alkyl ester of a fatty acid for the cleaning of paint brushes from wet or dry paint and/or for the removal of paint from painted surfaces.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
According to the invention a single ester may be used but preferably a mixture of esters of a number of different fatty acids will be used, said esters suitably having the same alkyl group in the moiety derived from an alkanol.
The term "lower alkyl ester" as used here and in the claims refers in this connection to an ester the alcohol moiety of which comprises a carbon chain which when compared to the acid moiety is shorter in length. The ester or esters suitably contain(s) a (C.sub.1 -C.sub.5)alkyl group, such as methyl, ethyl or isopropyl, preferably methyl, in the alkanol moiety.
The fatty acid or acids of the ester(s) may be at least one aliphatic (C.sub.8 -C.sub.22)monocarboxylic acid(s), preferably (C.sub.12 -C.sub.22) monocarboxylic acid(s).
According to a preferred embodiment of the invention a mixture of methyl esters of aliphatic (C.sub.8 -C.sub.22)monocarboxylic acids is used, preferably aliphatic (C.sub.12 -C.sub.22)monocarboxylic acids such as those occurring in vegetable oils. These acids may be saturated as well as unsaturated but preferably the mixture contains esters of unsaturated esters.
In particular the lower alkyl esters to be used in accordance with the present invention comprise rape-oil methyl ester.
Rape-oil methyl ester is commercially available in different grades and composition depending on such factors as the growth conditions and the processing of the rape to oil, etc. As an example of the composition the following ranges of the contents of esters contained therein may be given:
______________________________________ Ester Content, % by weight
______________________________________
C.sub.11 H.sub.23 COOCH.sub.3
0-1
C.sub.13 H.sub.27 COOCH.sub.3 0-1
C.sub.15 H.sub.31 COOCH.sub.3 2-8
C.sub.17 H.sub.35 COOCH.sub.3 0-6
C.sub.17 H.sub.33 COOCH.sub.3 50-60
C.sub.17 H.sub.31 COOCH.sub.3 18-27
C.sub.17 H.sub.29 COOCH.sub.3 6-12
C.sub.19 H.sub.39 COOCH.sub.3 0-2
______________________________________
The procedures in case of cleaning paint brushes as well as removing paint from painted surfaces using lower alkyl esters of fatty acids in accordance with the present invention are analogous to the procedures for the conventional use
REFERENCES:
patent: 4780235 (1988-10-01), Jackson
patent: 5340495 (1994-08-01), Mulcahy et al.
Carr Deborah D
Geist Gary
Svenska Rapsoljebolaget AB
LandOfFree
Method of removing paint from surfaces using fatty acid alkyl es does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of removing paint from surfaces using fatty acid alkyl es, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of removing paint from surfaces using fatty acid alkyl es will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1324661