1. Compounds having formula (I):
11
in which:
R1 represents H or CH3;
R2 represents CH3; C2H5; C3H7 or C4H9; and
compound (I) is optionally quaternised on one of the nitrogens, which is symbolised by the fact that the R3, X and associated with this nitrogen are shown between brackets;
if compound (I) is quaternised on a single nitrogen, R3 and X have the following meanings:
(1) R3 represents CH3 or CH2C6H5; and X represents Cl or CH3OSO3; or
(2) R3 represents a C1-C12-alkyl group ; and X represents Br or I;
if compound (I) is quaternised on both nitrogens, the two X may be the same or different and the two R3 may be the same, in which case:
(3) R3 represents a C5-C12-alkyl; and X represents CH3OSO3, Br or I;
or different, in which case:
(4) one of the R3 represents CH3 or CH2C6H5; and X represents Cl or CH3OSO3; and the other represents a C5-C12-alkyl group; and X represents Br or I;
and mixtures of these compounds.
2. Compound as claimed in claim 1, characterised in that it is represented by the formula (Ia):
12
3. Compounds as claimed in one of claims 1 and 2, characterised in that they are in the form of an aqueous solution.
4. Method of manufacturing compounds as defined in one of claims 1 to 3, characterised in that into a solution in an organic solvent or a mixture of organic solvents, of a compound of formula (II):
13
in which R1 and R2 are as defined in claim 1, is introduced, at a temperature of 35 to 80 C., a quaternising agent of formula (III):
R3X (III)
in which:
R3 and X have the meanings (1) and (2) specified in claim 1, in which case the molar ratio of quaternising agent (III)compound (II) is in a range of between 0.9 and 1.5 and a compound (I) is obtained which is quaternised on a single nitrogen; or
R3 and X have meaning (3) specified in claim 1 or two different quaternising agents are used, the R3 and X of these two quaternising agents having meaning (4) specified in claim 1, in which case the molar ratio of quaternising agent (s) (III)compound (II) is in a range of between 0.9 and 1.5 and a compound (I) is obtained which is quaternised on both nitrogens, then the reaction is allowed to continue at said temperature until compound(s) (III) hashave disappeared completely or substantially completely, after which water is added and then an aqueous solution of compound (I) is separated and the water removed as necessary.
5. Method as claimed in claim 4, characterised in that the organic solvent used is at least one selected from chloroform, dichloromethane and dichloroethane.
6. Method as claimed in one of claims 4 and 5, characterised in that it is conducted under pressure if the quaternising agent or at least one quaternising agent (III) is in the gaseous state.
7. Method as claimed in one of claims 4 to 6, characterised in that the quaternising agent or quaternising agents (III) isare introduced into the solution of compound (II) over a period of 0.5.-2 hours.
8. Method as claimed in one of claims 4 to 7, characterised in that once all of thee quaternising agent or quaternising agents hashave been introduced, the reaction between compounds (II) and (III) is conducted for a period of between 10 and 40 hours.
9. Method as claimed in one of claims 4 to 8, characterised in that all traces of organic solvent are removed from the resultant aqueous solution by stripping in air at a reduced pressure.
10. Method as claimed in one of claims 4 to 9, characterised in that it produces an aqueous solution with a concentration of 65 to 75% by weight of compound (I).
11. Method as claimed in one of claims 4 to 10, characterised in that it is conducted in the presence of at least one stabiliser chosen in particular from hydroquinone, hydroquinone methyl ether and 3,5-ditert.-butyl-4-hydroxytoluene and mixtures of these stabilisers, the content of stabilising agent(s) being in particular from 400 to 2000 ppm relative to the aqueous solution of the final compound (I) .
12. Method as claimed in one of claims 4 to 11, characterised in that compound (II) is prepared by causing a compound of formula (IV):
14
in which R2 is as defined above, to react with (meth)acrylic anhydride in the presence of triethylamine, with a molar ratio of (meth)acrylic anhydridecompound (IV) of 0.5 to 2, at a temperature of 20 to 100 C., in particular 30 to 60 C., for a period of 2 to 10 hours in the presence of at least one stabiliser such as phenothiazine, hydroquinone methyl ether, 3,5-ditert.-butyl-4-hydroxytoluene and hydroquinone and mixtures of these stabilisers in a ratio of 200 to 3000 ppm relative to the charge.
13. Homopolymers or copolymers containing units of at least one monomer of formula (I) as defined in one of claims 1 to 3.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A fluid filtration assembly for a dishwasher system including a tub defining a washing chamber configured to receive dishwasher contents, said fluid filtration assembly comprising:
a spray arm assembly configured to distribute fluid within the washing chamber;
a spray arm hub coupled to the spray arm assembly;
a filter assembly comprising a filter body defining a fluid inlet at one end coupled to the spray arm hub and a soil outlet at another end, the fluid inlet being, configured to receive wash fluid from the spray arm hub;
a soil collection chamber coupled in flow communication with said soil outlet at the another end of the filter body and configured to receive soil filtered by said filter assembly;
wherein the filter body extends between the spray arm hub and the soil collection chamber with the fluid inlet being disposed higher relative to the soil outlet, and the filter body is angled relative to the spray arm hub and the soil collection chamber;
a single pump assembly coupled between the spray arm hub and the soil collection chamber and configured to direct fluid to one of the spray arm assembly and said soil collection chamber, said single pump assembly defining a pump cavity;
a valve assembly movable between a first position and a second position,
wherein said valve assembly is coupled in flow communication with the spray arm assembly and said soil collection chamber, with said valve assembly in the first position, said pump assembly is configured to direct fluid to the spray arm assembly, and with said valve assembly in the second position, said pump assembly is configured to direct fluid only into said soil collection chamber, wherein said valve assembly prevents flow communication between the spray arm assembly and said pump assembly when said valve assembly is in the second position, the valve assembly being disposed within the pump assembly; and
a check valve separate from the valve assembly and in flow communication with the soil outlet and soil collection chamber and configured to regulate fluid flow between said filter assembly and said soil collection chamber.
2. A fluid filtration assembly in accordance with claim 1 wherein said valve assembly comprises a first gate selectively providing flow communication between said pump assembly and said soil collection chamber, a second gate selectively providing flow communication between said pump assembly and said spray arm assembly, and a door movable to close one of said first gate and said second gate.
3. A fluid filtration assembly in accordance with claim 1 wherein said filter assembly further comprises a screen positioned within said filter body and configured to filter soil particles, said screen positioned at an oblique angle configuration with respect to an inlet of said soil collection chamber to facilitate at least one of priming the pump assembly and reducing carryover.
4. A fluid filtration assembly in accordance with claim 1 further comprising a sump integrally formed with said soil collection chamber, said sump positioned with respect to a bottom portion of the tub and configured to collect fluid exiting, said spray arm assembly.
5. A fluid filtration assembly in accordance with claim 4 wherein said pump assembly is configured to pump fluid from said sump through said valve assembly.
6. A fluid filtration assembly in accordance with claim 1 wherein the spray arm assembly comprises at least one fluid discharge port defined thereon and facing said filter assembly.
7. A fluid filtration assembly in accordance with claim 1 wherein said pump assembly is configured to direct fluid to said filter assembly with said valve assembly in the first position.
8. A fluid filtration assembly according to claim 1, further comprising a drain port line coupling the valve assembly with the soil collection chamber, wherein when the valve assembly is in the second position, the pump assembly is configured to direct fluid through the drain port line into said soil collection chamber.
9. The fluid filtration system of claim 1, wherein the spray arm assembly comprise an upper spray atm assembly and a lower spray arm assembly.
10. The fluid filtration system of claim 1, comprising a fluid port on the spray arm hub coupled to the fluid inlet, on the filter body, wherein fluid from the pump assembly is directed into the filter assembly through the spray arm hub.
11. The fluid filtration system of claim 1, wherein the valve assembly is disposed within the pump assembly below a lower portion of the spray arm assembly and above said pump cavity.
12. A dishwasher comprising:
a tub defining a wash chamber;
a spray arm assembly positioned within said wash chamber and configured to distribute fluid within said wash chamber;
a filter assembly positioned within said wash chamber, said filter assembly comprising at one end a fluid inlet, coupled to the spray arm assembly and at another end a drain tube, the drain tube coupled in flow communication with said fluid inlet;
a soil collection chamber coupled in flow communication with said drain tube and configured to receive filtered particles from said filter assembly, the filter assembly being angled relative to the spray arm assembly and the soil collection chamber, the one end of the filter assembly with the fluid inlet coupled to the spray arm assembly being disposed higher relative to the other end of the filter assembly;
a single pump assembly configured to selectively direct fluid through the spray arm assembly and through said soil collection chamber, said pump assembly defining a pump cavity;
a valve assembly movable between a wash position and a drain position, in said wash position said valve assembly providing flow communication between said pump assembly and the spray arm assembly and in said drain position said valve assembly providing, flow communication only between said pump assembly and said soil collection chamber, wherein said valve assembly prevents flow communication between said pump assembly and said soil collection chamber when said valve assembly is in said wash position, and wherein the valve assembly is disposed within the pump assembly; and
a check valve separate from the valve assembly and in flow communication with the drain tube and the soil collection chamber and configured to restrict fluid flow from said soil collection chamber to said filter assembly.
13. A dishwasher in accordance with claim 12 wherein said valve assembly comprises a first gate providing flow communication between said pump assembly and said soil collection chamber, a second gate providing flow communication between said pump assembly and said spray arm assembly, and a door movable to close one of said first gate and said second gate.
14. A dishwasher in accordance with claim 12 wherein said filter assembly further comprises a filter body and a screen positioned within said filter body and configured to filter soil particles, said filter body positioned at an oblique angle configuration with respect to an inlet of said soil collection chamber to facilitate soil transfer into said soil collection chamber and said screen positioned at an oblique angle configuration with respect to the inlet to facilitate at least one of priming said pump assembly and reducing carryover.
15. A dishwasher in accordance with claim 12 further comprising a sump integrally formed with said soil collection chamber, said sump positioned within said wash chamber and configured to collect fluid exiting said spray arm assembly.
16. A dishwasher in accordance with claim 12 wherein the spray arm assembly further comprises at least one fluid discharge port configured to direct fluid towards said filter assembly.
17. A dishwasher in accordance with claim 12 wherein said soil collection chamber further comprises a drain outlet coupled in flow communication with a drain.
18. A dishwasher in accordance with claim 12, further comprising a drain port line coupling the valve assembly with the soil collection chamber, wherein when the valve assembly is in the drain position, the pump assembly is configured to direct fluid through the drain port line into said soil collection chamber.
19. The dishwasher of claim 12, wherein the spray arm assembly comprise an upper spray arm assembly and a lower spray arm assembly.
20. The dishwasher of claim 12, comprising a fluid port on the spray arm assembly coupled to the fluid inlet on the filter body, wherein fluid from the pump assembly is directed into the filter assembly through the spray arm assembly.