Process for washing textiles in an automatic washing machine, working substances and apparatus for its performance

• US 4,110,075 A
• Filed: 12/06/1976
• Issued: 08/29/1978
• Est. Priority Date: 12/04/1975
• Status: Expired due to Term

• Current Assignee: Chemische Werke Huls Aktiengesellschaft, Bosch Siemens Hausgerate GmbH (Robert Bosch GmbH)
• Original Assignee: Chemische Werke Huls Aktiengesellschaft, Bosch Siemens Hausgerate GmbH (Robert Bosch GmbH)
• Inventors: Graf, Richard, Brodzina, Lieselotte, Stache, Helmut, Strobele, Rudolf
• Primary Examiner(s): Schulz, William E.
• Application Number:
  US05/747,420
• Time in Patent Office: 631 Days
• Field of Search: 8/137, 8/151, 8/155, 68/17 R
• US Class Current: 8/137
• CPC Class Codes: C11D 2111/44 Multi-step processes
• CPC Class Codes: D06L 1/16 Multi-step processes
• CPC Class Codes: D06L 4/75 combined with cleaning or washing

Abstract

Washing process for textiles in an automatic washing machine, with application of active washing substances, structural substances and bleaching agents, involving loading of the textiles in the washing machine, adding water, agitating the textiles in the washing solution, pumping off the washing solution, and sequential rinse cycles, wherein the following active substances or combination of active substances are maintained in pumpable form in separate containers and added to the mixture in pumpable form before or during the washing process:

1. Active washing substances,

2. Structural substances,

3. A stabilized bleaching agent, if required,

4. A catalyst which accelerates the bleaching process, if required, and

5. A soft rinse agent, if required. After loading of the textiles to be laundered, the water is added in the ratio of 1:4 to 1:30 of kg. dry textile to liters water, 0.5 to 3.5 g of active washing substances per liter washing mixture are added, 2 to 6.5 g structural substances per liter washing mixture are added, washing carried out at a predetermined temperature with agitation for a period up to 50 minutes, the washing solution drained off and the washed textile subjected to 2- 5 rinse cycles.

Claims

1. In a washing process for textiles in an automatic washing machine with loading of the textiles in the machine, adding of water, application of active washing substances, structural substances and bleaching agents, agitation of the textiles in the washing solution, pumping off the washing solution, and sequential rinse cycles, the combination therewith of adding the water after loading the textiles in the ratio of 1:

4 to 1;

30 kg textile to liters water, maintaining said active washing substances in pumpable form, each in a separate container in the washing machine, adding 0.5 to 3.5 g of active washing substances and 2 to 6.5 g of structural substances per liter of washing water, agitating the textiles at a predetermined temperature for a wash period of up to 50 minutes, pumping off the washing solution, and subjecting the textiles to two to five rinse cycles.

2. A washing process according to claim 1, wherein a stabilized bleaching agent, a catalyst which accelerates bleaching and a soft rinse agent are maintained in pumpable form, each in a separate container, for addition to the washing chamber.

3. Process according to claim 1, wherein the washing is carried out in two steps and wherein in the first step of the washing process 0.5 to 1.5 g of active washing substances per 1 washing water is added and from 0 to 3 g structural substances are added per 1 washing mixture, the washing mixture is set for a temperature up to 60°

C., the textiles are agitated in the wash solution, the wash solution is pumped off, fresh water is fed in and, in a second step of the washing process, 0.5 to 2 g of active wash substances per liter washing water and 1 to 3.5 g of structural substances per liter wash mixture are added, the wash mixture is set to a temperature of approximately 95°

C. and the textiles are continued to be agitated in the washing solution during a wash period of up to 50 minutes.

4. Process according to claim 3, wherein the second step of the washing process is carried out at a temperature of 60°

C.

5. Process according to claim 3, wherein during the washing process 0.1 to 0.5 g of a stabilized bleaching agent is added per liter washing solution.

6. Process according to claim 4, wherein during the washing process 0.1 to 0.5 g of a stabilized bleaching agent is added per liter washing solution.

7. Process according to claim 6, wherein a catalyst is added that accelerates the dissociation of the bleaching agent.

8. Process according to claim 1, wherein an organic acid is maintained in pumpable form in a separate container and wherein 0.02 to 0.1 g of said organic acid is added per liter rinse mixture during a rinse cycle.

9. Process according to claim 2, wherein 0.1 to 0.5 g of a soft rinse agent per liter rinse water are added during a rinse cycle.

10. Process according to claim 1, wherein a combination of the following active substances in pumpable form are placed in the washing machine:

1. active washing substances,

2. structural substances,

12. Process according to claim 10, wherein the active substances are present in the following quantitative relationship:

0.5-3.5 parts per weight of active washing substance,

2.0-6.5 parts per weight of structural substances,

0.1-0.5 parts per weight of stabilized bleaching agent,

a catalyst which accelerates the bleaching process in an at least stoichiometric amount respective to the bleaching agent,

0.02-0.1 parts per weight of an organic acid, and

0.1-0.5 parts per weight of a soft rinse agent.

13. Process according to claim 10, wherein the active wash substance has the following compositon:

20-25 weight percent of sodium salt of a straight chain alkyl (C₁₀ -C₁₃) benzene-sulfonate

1.2-1.8 weight percent of sodium salt of toluolsulfonate

8.0-9.5 weight percent of sodium salt of hardened tallow fatty acid-soap

12.5-16.5 weight percent of the reaction product of tallow fatty alcohol with 11 moles ethylene oxide

9.5-13.0 weight percent isopropanol

15. Process according to claim 10 wherein the active wash substance has the following composition:

13.0-17.0 weight percent of sodium salt of olefinsulfonate containing 16-18 carbon atoms

30.0-35.0 weight percent of the reaction product of oleylalcohol and 10 moles ethylene oxide and 3 moles propylene oxide

2.0-4.0 weight percent of the sodium salt of hardened tallow fatty acid-soap

9.0-11.0 weight percent isopropanol

and 100.0 weight percent water of from 0°

-14°

dH.

16. Process according to claim 10, wherein the structural substance has the following composition:

35.0-40.00 weight percent tri potassium polyphosphate

0.8-1.8 weight percent sodium silicate (water glass)

0.5-0.9 weight percent NaOH

and 100.0 weight percent water of from 0°

-14°

dH.

17. Process according to claim 10, wherein the structural substance has the following composition:

44.0-47.0 weight percent Na-nitrilotriacetate

0.8-1.6 weight percent sodium silicate (water glass)

1.0-2.0 weight percent NaOH

and 100.0 weight percent water of from 0°

-14°

dH.

18. Process according to claim 10, wherein the bleaching agent has the following composition:

5.0-10.0 weight percent H₂ O₂

0.1-0.15 weight percent dipicolinicacid

and 100.0 weight percent water of from 0°

-14°

dH.

19. Process according to claim 10, wherein N-acetyl-caprolactam is the catalyst to accelerate the bleaching process.

20. Process according to claim 10, wherein the organic acid component has the following composition:

2.0 weight percent citric acid

0.2 weight percent lactic acid

0.2 weight percent acetic acid

and 100.0 weight percent water of from 0°

-14°

dH.

21. Process according to claim 1, wherein the amount of structural substances added will vary with the degree of hardness of the washing water with increasing amounts used for water of greater hardness to compensate for the increased hardness.

22. Process according to claim 1, wherein for washing slightly soiled textiles the active washing substances added are 0.5 to 1.5 g and the structural substances added are 2 to 3.5 g per liter of washing water;

for washing average soiled textiles the active washing substances added are 1 to 2.5 g and the structural substances added are 3 to 4.5 g per liter of washing water; and

for very soiled textiles the active washing substances added are 2 to 3.5 g and the structural substances are 4 to 6.5 g per liter of washing water.

23. Process according to claim 1, wherein for washing of heavy white textiles the water added after loading the textiles is in the ratio 1:

4 to 1;

5 kg textile to liters water;

for more delicate textiles the ratio is 1;

10 to 1;

22; and

for wool the ratio is 1;

20 to 1;

30.

24. Process as claimed in claim 1, wherein the structural substances are complex alkali phosphates, and in areas of soft water of from 0°

to 7°

dH adding complex alkali phosphates to active washing substances in the weight ratio of 1;

1 to 1.5;

1;

in areas of medium water hardness of 7°

to 14°

dH adding phosphates to active washing substances in the ratio of 1;

1 to 2.5;

1; and

in areas of hard water of 14°

dH and above adding complex alkali phosphates to active washing substances in the ratio of 2;

1 to 3;

1.

11. a stabilized bleaching agent,a catalyst which accelerates the bleaching process,an organic acid,a soft rinse agent,

and wherein the respective active substances are in small separate containers adapted to be installed in the machine and suitable for use in the household.

14. 3-0.5 weight percent NaOH

and 100.0 weight percent water of 0°

-14°

dH.