Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1999-12-10
2003-10-21
Delcotto, Gregory (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S210000, C510S212000, C510S366000, C510S433000, C510S488000, C510S499000, C510S500000, C510S501000, C510S506000
Reexamination Certificate
active
06635608
ABSTRACT:
The present invention relates to plaster type interior textured coating removing compositions. More particularly, it relates to a composition containing one or more alkoxy ether solvents and a low molecular weight alcohol with a blend of surfactants for use in removing painted, textured, plaster type interior coatings from a substrate surface or for removing asbestos lagging. Interior textured coating removing compositions which are effective and safe to use generally and on overhead surfaces have been sought for some time. Previously, the methods for removing such coatings have been sanding off, steaming off or chipping off. When sanding down a whole wall or ceiling, much dust is generated, the whole house is affected. Much time and effort is expended. A huge cleaning up operation is then needed. If it was necessary to hire a sander, this would add significantly to the cost of the exercise. When interior textured coatings are removed by steaming, very often the underlying plaster is damaged. This means that in addition to the cost of hiring the steamer, it is necessary to pay to have the wall replastered prior to further redecoration. Much time and effort is expended by this method. If the chosen method is to manually chip away at the interior textured coating, this is cheaper than hiring a steamer or a sander, but is very slow and laborious. Depending on the care being exercised, some damage to the underlying plaster may be caused. In some cases, older type interior textured coatings contain asbestos fibres. Such fibres are well known to be extremely hazardous to health and if coatings containing asbestos fibres in the United Kingdom are to be removed by paid tradespersons this work has to be undertaken by a licensed contractor. United Kingdom law requires that power tools are not used in the removal of asbestos-containing coatings since such use increases the risk of fragmentation of the hazardous fibres which would produce a multiplied risk of fibre inhalation. For this reason, interior textured coatings containing asbestos have to be manually chipped away to minimize the creation of hazardous fibre-containing dust and to facilitate safe disposal of the material.
The interior textured coating removing composition of the present invention provides a safe, easy to use solution to a common problem. In particular, it softens and hydrates plaster type interior textured coating residues without being corrosive, harmful or irritant to living tissue and within a timescale which would be acceptable to any user, whether trade or homeowner. Also, the underlying plaster will not be damaged. Hence the use of this interior textured coating remover will be quicker, safer and more convenient than any of the other methods which are currently in use. The composition of the present invention can be injected into asbestos fibre-containing coatings (asbestos lagging) to bring about rehydration of the lagging and facilitating wet removal of the fibre-containing material so suppressing the creation of hazardous asbestos-containing dust.
The present invention provides a plaster type interior textured coating remover composition comprising an aqueous mixture, i.e. a solution, of
(A) at least one alkoxy ether solvent;
(B) an alcohol containing from 1 to 6 carbon atoms;
(C) at least one nitrogen-containing compound selected from
(i) compounds having the general formula I
wherein R
1
is H or group of the formula
where R
3
is a straight or branched chain 6-22 C alkyl or alkenyl group; R
2
is H, or methyl or ethyl; w is 1 or 2; and Q
1
is —COOM
1
or —SO
3
M
1
, in which M
1
is an alkali metal cation or an optionally substituted ammonium group;
(ii) compounds having the general formula II
wherein R
4
is H or —(CH
2
CH
2
O)
z
—H; R
5
is a straight or branched chain 6-22 C alkyl or alkenyl group; m is 0 or 1; and each of x, y, and z is an integer wherein the total number of (CH
2
CH
2
O) groups is in the range of from 2 to 50;
(iii) an imidazoline compound of the formula III
wherein R is a straight or branched chain 7 to 18 C alkyl group and x is a number from 2 to 10;
(iv) a compound of the formula IV
in which R is a straight or branched chain 7-18 C alkyl group; R
1
is —CH
2
CH
2
OH or —(CH
2
)—
x
COONa, where x is 1 or 2, R
2
is (CH
2
)
Y
COONa, where y is 1 or 2; and R
3
is H or —CH
2
CH
2
OH; and
(v) an alkyl betaine of the formula V
R—N
+
(CH
3
)
2
CH
2
COO
−
(V)
wherein R is a straight or branched chain 7 to 18 C alkyl group;
(D) a compound having the general formula VI
RZ(QO)
n
H (VI)
wherein R is a straight or branched chain 6-22 C alkyl or alkenyl or an alkylphenyl group; Z is O or NH; Q is —(CH
2
)
2
— or —(CH
2
)
3
— or a combination thereof; n is such that the Hydrophilic Lipophilic Balance (HLB) of the molecule will be 7.3 to 15.0.
It has been found that the incorporation of a compound having the formula (I) to (V), with a compound of the formula (VI) in association with one or more alkoxy ether solvents and a low molecular weight alcohol improves penetration of the water through emulsion type paint, including vinyl silk, and into the body of the plaster type interior textured coating residues leading to fast and thorough removal of these residues. Preferably, a compound having the formula I will be incorporated and also, preferably a compound having the formula II. After application of a preparation according to this invention, the softened, hydrated plaster type interior textured coating can easily be removed by hand, using a scraper.
The one or more alkoxy ether solvents will typically be present in the composition of the invention in an amount of up to 90%, preferably from 6 to 25%, by weight based on the weight of the composition. The alkoxy ether solvent will usually comprise the main plaster type interior textured coating removing solvent in the composition. It is possible, however, that part of the alkoxy ether solvent content is replaced by one or more other cleaning or coupling solvents. Typical of the alkoxy ether solvents that can be used in the present invention are 1-18C alkyl (preferably 1 to 6C alkyl) monoethers of (poly)ethylene glycol, (poly) propylene glycol and (poly) butylene glycol. For reasons of health and safety, the preferred alkoxy ether solvent will be a propylene glycol ether, such as the methyl monoether of dipropylene glycol.
The composition of the invention also comprises a straight or branched chain alcohol containing from 1 to 6 carbon atoms. Preferably, the alcohol is a monohydric alcohol of the formula ROH, wherein R is a 1-5C alkyl group.
Isopropanol, methanol or ethanol are especially preferred examples of the alcohol used in association with the alkoxy ether solvent. Ethanol will be more preferred than methanol in view of its reduced toxicity. The alcohol will usually be used in an amount of up to 90% by weight, preferably from 0.1 to 25% by weight, based on the weight of the composition.
Softening and hydration of the emulsion or vinyl silk painted surface of the plaster type interior textured coating residue is accomplished by the alkoxy ether solvent with the low molecular weight alcohol in combination with a compound of formula (I) to (V) and a compound of formula (VI). Improved penetration of the alkoxy ether through the thickness of the plaster type interior textured coating residues can be achieved by the incorporation into the composition of a compound having a formula (I) or(II) together with a compound having the formula (VI) above.
In the composition of the invention at least one nitrogen-containing surfactant compound of the formula (I) to (V) will be used.
The compounds of the formula I are as follows:
wherein R
1
is H or a group of the formula
where R
3
is a straight or branched chain 6-22 C alkyl or alkenyl group; R
2
is H, or methyl or ethyl; w is 1 or 2; and Q
1
is —COOM
1
or —SO
3
M
1
, in which M
1
is an alkali metal cation or an optionally substituted ammonium group;
In the general formula I above the group R
1
may be H or an aliphat
Delcotto Gregory
Volpe and Koenig, P.C
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