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US 6,632,782 B1Granted
Paint removing compositions
OwnerIthiel Mogridgeinventor
Life of this patent
Estimating the term…
Abstract
A composition for use in removing paint from painted surfaces comprising an aqueous mixture of at least one alkoxyether solvent, a C1-C6 alcohol, at least one nitrogen containing compound, and a nonionic compound having an HLB value of 7.3 to 15.0.
Claims21
A paint remover composition in the form of a continuous solution comprising an aqueous mixture of
- (A) at least one alkoxy ether solvent for use in softening a plurality of paint layers;
- (B) an alcohol containing from 1 to 6 carbon atoms which assists the alkoxy ether in softening the plurality of paint layers;
- (C) (i) a nitrogen containing compound having the general formula I
- where R1 is H or group of the formula
- where R3 is a straight or branched chain 6-22 C alkyl or alkenyl group;
- R2 is H, or methyl or ethyl;
- w is 1 or 2;
- and Q1 is —COOM1 or —SO3M1, in which M1 is an alkali metal cation or an optionally substituted ammonium group, and wherein the compound of formula I, in use, promotes the penetration of the alkoxy ether solvent and the alcohol through the plurality of paint layers by means of its surfactant properties;
- and optionally, at least one nitrogen-containing compound selected from
- (ii) compounds having the general formula II
- wherein R4 is H or —CH2CH2O)z—H;
- R5 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 (CH2CH2O) 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
- which R is a straight or branched chain 7-18 C alkyl group;
- R1 is —CH2CH2OH or [Parenopenst]CH2[Parenclosest]xCOONa, where x is 1 or 2, R2 is [Parenopenst]CH2[Parenclosest]yCOONa, where y is 1 or 2;
- and R3 is H or —CH2CH2OH;
- and
- (v) an alkyl betaine of the formula V
- R—N+(CH3)2CH2COO− (V)
- wherein R is a straight or branched chain 7 to 18 C alkyl group;
- and
- (D) a compound having the general formula VI
- RZ(QO)nH (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 —(CH2)2— or —(CH2)3— or a combination thereof;
- n is such that the Hydrophilic Lipophilic Balance (HLB) of the molecule will be 7.3 to 15.0, wherein the compound of formula VI assists in promoting the penetration of the alkoxy ether solvent and the alcohol through the plurality of paint layers, thereby softening the multiple coats of paint and allowing their easy removal.
28 more elements
A method for removing a plurality of paint layers by softening and hydration of the paint, which comprises applying to the paint layers a paint remover composition in the form of a continuous solution comprising an aqueous mixture of
- (A) at least one alkoxy ether solvent;
- (B) an alcohol containing from 1 to 6 carbon atoms;
- (C) (i) a nitrogen containing compound having the general formula I
- wherein R1 is H or group of the formula
- where R3 is a straight or branched chain 6-22 C alkyl or alkenyl group;
- R2 is H, or methyl or ethyl;
- w is 1 or 2;
- and Q1 is —COOM1 or —SO3M1, in which M1 is an alkali metal cation or an optionally substituted ammonium group;
- and, optionally, at least one nitrogen-containing compound selected from
- (ii) compounds having the general formula II
- wherein R4 is H or —(CH2CH2O)z—H;
- R5 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 (CH2CH2O) 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;
- R1 is —CH2CH2OH or [Parenopenst]CH2[Parenclosest]xCOONa, where x is 1 or 2, R2 is [Parenopenst]CH2[Parenclosest]yCOONa, where y is 1 or 2;
- and R3 is H or —CH2CH2OH;
- and
- (v) an alkyl betaine of the formula V
- R—N+(CH3)2CH2COO− (V)
- wherein R is a straight or branched chain 7 to 18 C alkyl group;
- and
- (D) a compound having the general formula VI
- RZ(QO)nH (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 —(CH2)2— or —(CH2)3— or a combination thereof;
- n is such that the Hydrophilic Lipophilic Balance (HLB) of the molecule will be 7.3 to 15.0,
- wherein the alkoxy ether solvent penetrates through the thickness of the paint layers.
29 more elements
A paint remover composition in the form of a continuous solution comprising an aqueous mixture of
- (A) at least one alkoxy ether solvent for use in softening a plurality of paint layers;
- (B) an alcohol containing from 1 to 6 carbon atoms which assists the alkoxy ether in softening the plurality of paint layers;
- (C) (i) a nitrogen containing compound having the general formula I
- wherein R1 is H or group of the formula
- where R3 is a straight or branched chain 6-22 C alkyl or alkenyl group;
- R2 is H, or methyl or ethyl;
- w is 1 or 2;
- and Q1 is —COOM1 or —SO3M1, in which M1 is an alkali metal cation or an optionally substituted ammonium group, and wherein the compound of formula I, in use, promotes the penetration of the alkoxy ether solvent and the alcohol through the plurality of paint layers by means of its surfactant properties;
- and, optionally, at least one nitrogen-containing compound selected from
- (ii) compounds having the general formula II
- wherein R4 is H or —CH2CH2O)z—H;
- R5 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 (CH2CH2O) 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;
- R1 is —CH2CH2OH or [Parenopenst]CH2[Parenclosest]xCOONa, where x is 1 or 2, R2 is [Parenopenst]CH2[Parenclosest]yCOONa, where y is 1 or 2;
- and R3 is H or —CH2CH2OH;
- and
- (v) an alkyl betaine of the formula V
- R—N+(CH3)2CH2COO− (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)nH (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 —(CH2)2— or —(CH2)3— or a combination thereof;
- n is such that the Hydrophilic Lipophilic Balance (HLB) of the molecule will be 7.3 to 15.0, wherein the compound of formula VI assists in promoting the penetration of the alkoxy ether solvent and the alcohol through the plurality of paint layers, thereby softening the multiple coats of paint and allowing their easy removal;
- and
- (E) at least one thickener to increase the viscosity of the composition, whereby application of the composition to a surface is facilitated and whereby the length of time that the composition stays on a surface to which it is applied is increased.
29 more elements
Dependencies are inferred from the claim text.