DE3920704A1 - BUILDER FOR TEXTILE DETERGENTS - Google Patents

Description

The present invention relates to builders for textile washing for washing coarse, white and colored laundry in Washing machines.

Suitable detergents for washing machines consist of a Combination of surfactants as detergent substances, Bleaches, water glass, dispersants and the so-called ten builders, on the one hand, a builder function take over, on the other hand by binding the water hardness Incrustations of inorganic and organic stock prevent sharing on the laundry and thereby prevent life Increase the duration of the textiles and a comfortable fit effect on the skin.

Suitable builders are alkali phosphates, especially sodium Tripolyphosphate, zeolite A and alkali silicate, in particular crystalline layered sodium silicate.

Alkali phosphates are used in certain regions because of the Eu Risk of trophying slowly flowing waters and lakes Detergents no longer added, even though they are alkali phosphate have excellent builder properties.

In US-A-42 74 975 is a detergent composition described, in which as a builder in particular zeolite formula

Na ₁₂ (AlO ₂ × SiO ₂ ) ₁₂ × xH ₂ O,

where x is an integer from is about 20 to 30 is used.

A disadvantage is the use of zeolite as a builder the accelerated breakdown of the bleach during the la duration of the detergent and incrustation of the laundry  in the course of several washing processes by inorganic and organic ingredients. By a relatively high level Part of polycarboxylates in zeolite-containing detergents the incrustations can be partially suppressed. There but then an undesirably high polycarboxylate must stop in the wastewater. On the dismantling of the Bleach does not have an increased polycarboxylate content Influence.

In US-A-47 28 443 detergents are described in which as a builder crystalline layered silicas or their alkali salts of the formula

M ₂ Si _x O _{2x + 1} × y H ₂ O,

where x < 7.0, M = Na, K or H and y = 0 to 25 mean incorporated are. The disadvantage of these builders is the low level Ca hardness binding capacity, which is an incrustation with Ca salts not sufficiently prevented on the laundry. These Builders have a very high Mg hardness binding capacity.

The invention has for its object a builder admit, with the help of which a textile detergent can be produced is, its bleaching effect largely during storage is retained, which has an increased cleaning effect and in the case of a small polycarboxylate dosage only one slight incrustation on the laundry.

The invention with which the task is surprising solved and the disadvantages described are avoided, concerns builders for textile detergents, which consist of a Mixture of 20 to 80 wt .-% crystalline sodium layer i Likat and 20 to 80 wt .-% zeolite exist.

The builders for textile detergents according to the invention can still preferred and optionally characterized be that

• a) the builder content in the textile detergent 5 to 60 % By weight, preferably 10 to 30% by weight;
• b) a crystalline layered sodium silicate with a molar ratio SiO ₂ / Na ₂ O of (1.9 to 3.5): 1 is used;
• c) a zeolite of the formula Na ₁₂ (AlO ₂ × SiO ₂ ) ₁₂ × xH ₂ O, where rin x is an integer from 20 to 30, is used;
• d) they have a primary particle size of 0.01 to 1000 microns, especially from 1 to 20 microns, used will;
• e) together with up to 2.0% by weight of polycarboxylate, based on the textile detergent, as a dispergy rendering cobuilder;
• f) together with inorganic and / or organic Phosphates and / or phosphonates, borates, Zitra ten, gluconates, ethylenediaminetetraacetic acid, Ni trilotriacetic acid and / or iminodiacetic acid or their alkali salts in amounts up to 20% by weight, based on the textile detergent, who used the;
• g) together with the other ingredients of the Textile detergent after the spray mixing process ren by spraying aqueous binder, esp special water glass and / or cellulose ether, in loading can be agglomerated from 0.25 to 2.5 mm.

Suitable crystalline layered sodium silicates have an ion exchange capacity of more than 100 mmol Na⁺ / 100 g anhydrous substance and can be selected from naturally occurring alkali silicates such as natrosilite (Na ₂ Si ₂ O ₅₎ or Revdite (Na ₂ Si ₂ O ₅ × 5H ₂ O) . In general, however, synthetically produced layered silicates are preferred, in particular those obtained in accordance with EP-A-02 93 640.

Suitable zeolites have an ion exchange capacity of more than 100 mmol Na⁺ / 100 g anhydrous substance, as in for example naturally occurring chabazite (Ca [Al₂Si₄O₁₂] · 6 H₂O), the calcium content of which is sodium is exchanged.

In general, however, synthetically produced Ze olites preferred, in particular those according to US-A-42 74 975 be preserved.

The layered silicate and the zeolite unfold as a builderge mix a synergistic effect through the one hand represents the decomposition of the bleach during storage based on detergent formulations greatly slowed down and on the other hand with an incrustation of the laundry Calcium and magnesium salts are effectively prevented.

The surfactants found in the textile according to the invention detergents carboxylates (soaps), alkanesulfonates, lauryl benzenesulfonate, dodecylbenzenesulfonate, alkylphenol polygly kolether or the condensation product of polypropylene gly Kol with 8 mol ethylene oxide proven.

Sodium perborate tetrahydrate (NaBO ₃ × 4H ₂ O), sodium perborate monohydrate (NaBO ₃ × H ₂ O) or sodium percarbonate (2Na ₂ CO ₃ × 3H ₂ O ₂ ) are suitable as bleaching agents.

Textile detergents with the builder according to the invention are in Dependent on the dosage for all water hardness levels suitable, provided that the Ge velvety hardness of 70 to 85% from Ca hardness and 30 to 15% consists of Mg hardness.

The primary washing effect of the textile detergent was at 60 ° C on various test fabrics (cotton standard 101-EMPA-; Polyester / cotton 2: 1 standard 104-EMPA-,  Cotton standard 10 C-WFK, polyester / cotton 2: 1 Standard 20 C-WFK) according to DIN 44 983, sheet 1 (January 1968) Paragraph 4.1 determined by determining the remission difference tt, which results from the difference of the remission of the Testge webes after and before washing results.

The secondary washing effect was at 90 ° C on various Test fabrics (cotton standard 101-EPMA, terry cotton tissue) according to DIN 44 983 (4.4).

The total hardness of the wash water was 18 ° d (hardness range III). The ratio CaO: MgO varied between 2: 1 and 5: 1.

In the washing tests, 115 g were used in the prewash cycle Detergent and 135 g detergent for the main wash siert.

The invention is further illustrated by the following examples illustrated.

Examples 1 to 9

The detergent formulations were made from the following Individual components according to the spray familiar to the person skilled in the art Belmischverfahren prepared (Table 1).  

Table 1

Detergent formulations

The primary wash results are shown in Table 2 as Re Mission difference specified, the bleaching effect on the PE / cotton fabric with tea soiling in Table 3 ge is listed. The remission difference was ge determined according to DIN 44 983 (4.1).

Table 2

Primary washing results at 60 ° C determined as% remission difference

Table 3

Bleaching effect

Table 4

Incrustation in% by weight

Claims (10)

1. Builder for textile detergents, characterized in that it consists of a mixture of 20 to 80 wt .-% crystalline sodium layered silicate and 20 to 80 wt .-% Zeo lith. 2. Builder for textile detergents according to claim 1, characterized characterized in that the builder content in textile washing tel is 5 to 60 wt .-%. 3. Builder for laundry detergent according to claim 1, characterized characterized in that the builder content in textile washing tel is 10 to 30 wt .-%. 4. Builder for textile detergents according to one of claims 1 to 3, characterized in that a crystalline sodium layer silicate with a molar ratio of SiO ₂ / Na ₂ O of (1.9 to 3.5): 1 is used. 5. Builder for textile detergents according to one of claims 1 to 3, characterized in that a zeolite of the formula Na ₁₂ (A10 ₂ × SiO ₂ ) ₁₂ × xH ₂ O, where x is an integer from 20 to 30, is used . 6. Builder for textile detergents according to one of claims 1 to 5, characterized in that the builder with a Primary particle size from 0.01 to 1000 microns used becomes.   7. Builder for textile detergents according to one of claims 1 to 5, characterized in that the builder with a Primary particle size of 1 to 20 microns is used. 8. Builder for textile detergents according to one of claims 1 to 7, characterized in that it together with bis to 2.0 wt .-% polycarboxylate, based on the textile detergent, used as a dispersing cobuilder becomes. 9. Builder for textile detergents according to one of claims 1 to 8, characterized in that the builder together with inorganic and / or organic phosphates and / or phosphonates, borates, citrates, gluconates, ethyl lendiaminetetraacetic acid, nitrilotriacetic acid and / or Iminodiacetic acid or its alkali salts in amounts up to 20% by weight based on the textile detergent, is used. 10. Builder for textile detergents according to one of the claims 1-9, characterized in that together with the other ingredients of the laundry detergent after Spray mixing process by spraying aqueous Binder, especially water glass and / or cellulose ether, is agglomerated in the range from 0.25 to 2.5 mm.