Aqueous cleaner
AssigneeCook Composites and Polymers Co.
InventorSidney M. Short
Life of this patent
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Abstract
Dried resins, such as polyester sheet molding resins, are effectively removed from metallic surfaces by a cleaning composition prepared from a cleaning concentrate comprising an an organophosphoric ester surfactant; a nonionic surfactant, such as an acetylenic alcohol or diol, or a polyoxyethylene oxide ether of an alkyl phenol or alkanol; and a water-miscible solvent such as a 2-pyrrolidone, tetrahydrofurfuryl alcohol, or an ethoxylated THFA or furfuryl alcohol. The cleaning compositions can contain detergent builders, chelating agents, and other optional components.
Claims17
An aqueous cleaning concentrate useful for removing from a substrate a resin compound that is at least partially dried, the concentrates forming stable, homogeneous, single phase solutions at room temperature and comprising water and, in weight percent based upon the total weight of the concentrate:
- A. between about 1% and about 20% of a neutralized organophosphoric ester surfactant;
- B. between about 0.1% and about 10% of a nonionic surfactant selected from the group consisting of;
- (1) an acetylenic alcohol or diol of the formula ##STR5## in which R.sub.1 is an alkynyl radical of from 2 to 5 carbon atoms;
- R.sub.2 is hydrogen or an alkyl radical of less than 4 carbon atoms;
- and R.sub.3 is an alkyl or hydroxy alkyl radical of from 1 to 8 carbon atoms, the number of carbons in the molecule totaling 4 to 12;
- (2) a polyoxyethylene oxide ether of an alkyl phenol or alkanol in which the alkyl radical has from 6 to 16 carbon atoms, and the number of ethylene oxide repeating units is from 4 to 10;
- and
- (3) a mixture thereof;
- and
- C. between about 1% and about 20% of a water-miscible solvent selected from the group consisting of
- (1) a 2-pyrrolidone of the formula ##STR6## in which R is hydrogen, an alkyl radical of 1 to 3 carbon atoms, or a hydroxylalkyl radical of 1 to 3 carbon atoms;
- (2) tetrahydrofurfuryl alcohol;
- (3) an ethoxylated compound of the formula
- RO(CH.sub.2 OH.sub.2 O).sub.n H
- in which R is ##STR7## and n is about 0.5 to about 10;
- and (4) mixtures thereof.
An aqueous cleaning composition useful for removing from a substrate a resin compound that is at least partially dried, the concentrates forming stable, homogeneous, single phase solutions at room temperature and comprising water and, in weight percent based upon the total weight of the concentrate, at least about:
- A. between about 0.2% and about 4% of a neutralized organophosphoric ester surfactant;
- B. between about 0.02% and about 2% of a nonionic surfactant selected from the group consisting of;
- (1) an acetylenic alcohol or diol of the formula ##STR8## in which R.sub.1 is an alkynyl radical of from 2 t 5 carbon atoms;
- R.sub.2 is hydrogen or an alkyl radical of less than 4 carbon atoms;
- and R.sub.3 is an alkyl or hydroxy alkyl radical of from 1 to 8 carbon atoms, the number of carbons in the molecule totaling 4 to 12;
- (2) a polyoxyethylene oxide ether of an alkyl phenol or alkanol in which the alkyl radical has from 6 to 16 carbon atoms, and the number of ethylene oxide repeating units is from 4 to 10;
- and
- (3) a mixture thereof;
- and
- C. between about 0.2% and about 4% of a watermiscible solvent selected from the group consisting of
- (1) a 2-pyrrolidone of the formula ##STR9## in which R is hydrogen, an alkyl radical of 1 to 3 carbon atoms, or a hydroxylalkyl radical of 1 to 3 carbon atoms;
- (2) tetrahydrofurfuryl alcohol;
- (3) an ethoxylated compound of the formula
- RO(CH.sub.2 OH.sub.2 O).sub.n H
- in which R is ##STR10## and n is about 0.5 to about 10;
- and (4) mixtures thereof.
Dependencies are inferred from the claim text.