DE19923303C2 - Detergent for removing the detergent residues and for producing textiles that are compatible with the skin after the washing process - Google Patents

Description

field of use

The invention can be carried out in the household in the form of machine or hand washing, in large laundries be used by yourself or in textile finishing.

State of the art

The number of allergy sufferers is increasing worldwide (every third German suffers from allergies) The skin as the largest organ in the body is particularly affected and has the ability to separate polluting substances or to absorb substances. textiles are considered the second skin and can support these tendencies.

Numerous eco-labels face this problem and make a human-ecological contribution, by placing newly produced textiles at high levels through demanding limit values Should impart skin compatibility. In particular, heavy metals are used according to the guidelines the drinking water regulation and dyes according to their authenticity and the potential Presence of carcinogenic or suspicious amines (Consumer Goods Ordinance) rated. In addition, a skin-neutral pH value, a low formaldehyde content and pesticides or the absence of pentachlorophenol or carriers.

Practice shows that the producers, together with their upstream suppliers, have only one targeted material selection can meet these criteria.  

The eco labels only refer to brand new textiles and do not take into account the fact that textiles are exposed to environmental influences during the wearing process (e.g. heavy metal loaded Street dust, formaldehyde-releasing wardrobes, alkaline drinking water, leaded gasoline, chrome-hardened leather goods, cigarette smoke) are exposed and exposed to Enrich pollutants or be cleaned by the cyclical washing process, but are contaminated with residues of detergents and plasticizers, which u. a. skin allergies can trigger.

Powerful detergents mostly contain 5-15% anionic surfactants with and without Oxygen bleach, approx. 5% non-ionic surfactants, phosphonates for increased effectiveness, Polycarboxylates against lime and graying, soda, 15-30% zeolites and small amounts of Brighteners, perfume oils and silicates. The detergents can only be used in an alkaline medium Develop optimal effectiveness.

The washing machines in the home are very water and energy saving. For 5 kg of laundry only a total of 39-65 liters of drinking water (usually pH <7.5) are required Washing temperature can be limited to 40-60 ° C due to the cleaning power of the detergent become.

The rinsing processes have been minimized in such a way that considerable residues of the Detergent remains in the textile structures (approx. 500 mg detergent or 200 mg Silicates per kg of laundry or 48 mg of fabric softener per kg of laundry).

It is obvious that the human skin is subjected to a stress test, because

• - The skin-neutral pH value is lost after the washing process and thereby damages the natural protective acid mantle of the skin and weakens its resistance to dangerous microorganisms
• - Sharp-edged silicates can scratch the skin at typical joint points on the body and open them to unwanted substances,
• - Low washing temperatures around 40-60 ° C, so that according to the knowledge of the literature still many germ carriers can survive. The eczema skin has an increased tendency to bacterial infections.

The residual detergents mentioned here or the lime deposits in the case of a slightly alkaline hard washing water leads to dry rigidity of the laundry, which causes skin irritation can. To avoid this, laundry detergents are used, which are replaced by a re-use of detergents (cationic or non-ionic products) - usually in the acidic medium applied - the remaining alkaline detergents from the Eliminate detergent. Cationic surface-active agents are particularly suitable the basis of quaternary ammonium compounds with different ligands (JP 07089828 A, DE 44 39 570 A1, EP 0323395 A2, US 3984335 A), which are today consistently in the classic Fabric softeners can be found on the market and the laundry after drying convey the desired softness.

Aim of the invention

All known ecosignets refer to newly produced textiles and exclude the washing process. Simply through the wearing process with its negative Environmental influences (street dust containing heavy metals, cigarette smoke, leather containing chrome goods, leaded petrol etc.) some limit values can no longer be maintained. The Washing process itself creates new wearing conditions such as alkaline textiles on the Detergent residues on the skin or in the textile, leading to dry rigidity and to Can cause skin allergies. This problem is exacerbated by water and Energy-saving driving style of modern washing machines at low temperatures. One tries to remedy these disadvantages by, in particular, acidic quaternaries Ammonium compounds of different structures in the form of fabric softener in the last Rinse bath can be added. The residual surfactants from detergents (primarily anionic in nature), that have to be fiber-affine to remove dirt and also like to stay there are included the fabric softener is again overplayed by cationic detergents.  

Large molecular micelles are formed from the anionic components of the detergent and the cationic fabric softener, which improves the handle, but through the complexation are insoluble and mostly remain in washed textiles and skin damage cause. The way, remaining detergents through oppositely charged detergents Apparently eliminating it leads to double stress on human skin.

According to the invention, here is a new multifunctional solution set for a fabric softener selected that works both in the laundry and in the rinsing bath.

• 1. The anionic detergent residues are no longer characterized by cationic detergents neutralized the fabric softener, but by cyclodextrins with their hydrophilic exterior area and the hydrophobic inner jacket complexed and transported into the washing solution.
• 2. The addition of organic acids is such that the last rinse Concentration of skin-friendly citric and lactic acids is sufficient to adjust the skin-neutral area of the laundry and the defenses of the human Strengthen skin.
• 3. The addition of a sugar-like dispersing and sequestering agent has the task of handle-hardening silicate deposits from the wash water (zeolites, drinking water components).
• 4. The contribution of the two skin vitamins ascorbic acid and 4-aminobenzoic acid.
• 5. The addition of an Indian skin oil of the type "Vata" with a skin-friendly Emulsifier to make the water-insoluble skin oil long-term stable under acidic conditions disperse.

Instead of the skin-damaging surfactant-containing fabric softener, a product is used according to the invention which uses natural sugar-like compounds and organic acids. The immune system of the human skin is strengthened because it also promotes the desired microbial skin flora of the skin vitamins. This also significantly relieves the burden on the environment, because instead of the quaternary ammonium compounds, which are difficult to biodegrade, the inventions consistently contain constituents that are part of the natural cycle and are characterized by an excellent BOD ₅ / COD ratio of 0.47.

Claims (1)

1. Detergent for removing the detergent residues and for producing skin-compatible textiles after the washing process in the form of a solution consisting of
100-200 g / l citric acid and 100-200 g / l lactic acid
10-100 g / l cyclodextrin
10-100 g / l sequestering agent based on sugar
1-10 g / l I (+) - ascorbic acid and 0.1-1 g / l 4-aminobenzoic acid and
0.3-5 g / l cationic emulsifier