Claims
- 1. An aqueous composition having a pH of from about 0.1 to about 5 comprising an organic acid and surfactant, wherein said surfactant consists essentially of cationic surfactant, zwitterionic surfactant, amphoteric surfactant, and mixtures thereof; said composition is perfume-free; and said composition is substantially odor-free.
- 2. A composition according to claim 1 wherein said composition is a limescale removing composition having a pH of from about 0.1 to about 3.
- 3. A composition according to claim 1 wherein said organic acid is maleic acid.
- 4. A composition according to claim 3 comprising from about 0.1% to about 45% by weight of the total compositions of said acid.
- 5. A composition according to claim 3 comprising from about 1% to about 25% by weight of the total compositions of said acid.
- 6. A composition according to claim 3 comprising from about 8% to about 20% by weight of the total compositions of said acid.
- 7. A composition according to claim 1 comprising from about 0.01% to about 10% by weight of the total compositions of said surfactant.
- 8. A composition according to claim 7 comprising from about 0.01% to about 5% by weight of the total compositions of said surfactant.
- 9. A composition according to claim 7 comprising from about 0.01% to about 2% by weight of the total compositions of said surfactant.
- 10. A composition according to claim 3 comprising from about 0.01% to about 10% by weight of the total compositions of said surfactant.
- 11. A composition according to claim 1 wherein said surfactant is a cationic surfactant of the formula R.sub.1 R.sub.2 R.sub.3 R.sub.4 N.sup.+ X.sup.-, wherein X is a counteranion, R.sub.1 is a C.sub.8 -C.sub.20 hydrocarbon chain and R.sub.2, R.sub.3 and R.sub.4 are independently selected from H or C.sub.1 -C.sub.4 hydrocarbon chains or mixtures thereof.
- 12. A composition according to claim 11 wherein in said cationic surfactant X is bromide or chloride, R.sub.1 is a C.sub.12 -C.sub.18 hydrocarbon chain.
- 13. A composition according to claim 3 wherein said surfactant is a cationic surfactant of the formula R.sub.1 R.sub.2 R.sub.3 R.sub.4 N.sup.+ X.sup.-, wherein X is a counteranion, R.sub.1 is a C.sub.8 -C.sub.20 hydrocarbon chain and R.sub.2, R.sub.3 and R.sub.4 are independently selected from H or C.sub.1 -C.sub.4 hydrocarbon chains or mixtures thereof.
- 14. A composition according to claim 1 wherein said surfactant is a zwitterionic surfactant of the formula
- R.sub.1 --C(O)--N(R.sub.2)--C(R.sub.3).sub.2).sub.n --N(R.sub.2).sub.2.sup.(+) --(C(R.sub.3).sub.2).sub.n --SO.sub.3.sup.(-)
- or
- R.sub.1 --C(O)--N(R.sub.2)--(C(R.sub.3).sub.2).sub.n --N(R.sub.2).sub.2.sup.(+) --(C(R.sub.3).sub.2).sub.n --COO.sup.(-)
- wherein each R.sub.1 is an alkyl group containing from about 8 up to about 20 carbon atoms, each R.sub.2 is either a hydrogen, when attached to the amido nitrogen, short chain alkyl or substituted alkyl containing from about 1 to about 4 carbon atoms, each R.sub.3 is selected from the group consisting of hydrogen and hydroxy groups and each n is a number from 1 to 4, with no more than one hydroxy group in any (C(R.sub.3).sub.2) moiety or mixtures thereof.
- 15. A composition according to claim 14 wherein in said zwitterionic surfactant R.sub.1 is an alkyl group containing up to about 18 carbon atoms, R.sub.2 is a group selected from the group consisting of methyl, ethyl, propyl, hydroxy substituted ethyl or propyl and mixtures thereof, and n is a number from 2 to 3.
- 16. A composition according to claim 14 wherein said zwitterionic surfactant is a C.sub.10 -C.sub.14 fatty acylamidopropylene(hydroxypropylene)sulfobetaine.
- 17. A composition according to claim 3 wherein said surfactant is a zwitterionic surfactant of the formula
- R.sub.1 --C(O)--N(R.sub.2)--C(R.sub.3).sub.2).sub.n --N(R.sub.2).sub.2.sup.(+) --(C(R.sub.3).sub.2).sub.n --SO.sub.3.sup.(-)
- or
- R.sub.1 --C(O)--N(R.sub.2)--(C(R.sub.3).sub.2).sub.n --N(R.sub.2).sub.2.sup.(+) --(C(R.sub.3).sub.2).sub.n --COO.sup.(-)
- wherein each R.sub.1 is an alkyl group containing from about 8 up to about 20 carbon atoms, each R.sub.2 is either a hydrogen, when attached to the amido nitrogen, short chain alkyl or substituted alkyl containing from about 1 to about 4 carbon atoms, each R.sub.3 is selected from the group consisting of hydrogen and hydroxy groups and each n is a number from 1 to 4, with no more than one hydroxy group in any (C(R.sub.3).sub.2) moiety or mixtures thereof.
- 18. A composition according to claim 1 wherein said composition further comprises sulfamic acid, methanesulfonic acid, citric acid, phosphoric acid, hydrochloric acid or mixtures thereof.
- 19. A composition according to claim 3, wherein said composition further comprises sulfamic acid, methanesulfonic acid, citric acid, phosphoric acid, hydrochloric acid or mixtures thereof.
- 20. The composition of claim 12 wherein R.sub.1 is C.sub.14, C.sub.16 or C.sub.16 and R.sub.2, R.sub.3, and R.sub.4 are all methyl.
- 21. A process of descaling appliances wherein an acidic composition comprising a surfactant consisting of cationic, zwitterionic, amphoteric surfactants or mixtures thereof is applied in its neat form or in its diluted form to said appliances, then left to act and then removed by rinsing.
- 22. The process of claim 21 wherein said acidic composition comprises maleic acid.
- 23. The process of descaling appliances by applying an effective amount of an aqueous composition having a pH of from about 0.1 to about 5, either in its neat form, or diluted, said composition comprising an organic acid selected from the group consisting of sulfamic acid, methanesulfonic acid, citric acid, phosphonic acid, hydrochloric acid, and mixtures thereof and additionally comprising maleic acid, and surfactant, wherein said surfactant consists essentially of cationic surfactant, zwitterionic surfactant, amphoteric surfactant, and mixtures thereof; said composition is perfume-free; and said composition is substantially odor-free.
Priority Claims (1)
Number |
Date |
Country |
Kind |
94870020 |
Feb 1994 |
EPX |
|
Parent Case Info
This is a 371 of PCT/US95/01299 filed Feb. 2, 1995.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/US95/01299 |
2/2/1995 |
|
|
9/11/1996 |
9/11/1996 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO95/21231 |
8/10/1995 |
|
|
US Referenced Citations (6)