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Pre-treatment surfactants for printing and dyeing

2021-06-06

The auxiliaries commonly used in pre-treatment of printing and dyeing are penetrants, detergents, scouring agents, oxygen bleach stabilizers, and chelating dispersants. Most of these auxiliaries are composed of surfactants and organic compounds, inorganic salts, and solvents. Among them, anionic surfactants are used mostly: sodium alkyl sulfonate, sodium alkyl benzene sulfonate, fatty alcohol polyoxyethylene ether Sodium sulphate, sodium secondary alkyl sulphonate, sodium 2-alkenyl sulphonate, butyl tallow sulphonate, sodium alkyl sulphate, sodium alkyl sulphate, sulfated castor oil, alkyl sulphate sulphate, alkane Phosphoric acid acetic acid salt, alkyl polyoxyethylene ether phosphorus (sulfuric acid) vinegar salt and so on. Non-ionic surfactants commonly used are: fatty alcohol polyoxyethylene ether, fatty alcohol guanamine, sorbitol polyoxyethylene ether, nonyl phenol polyoxyethylene ether, texyl phenol polyoxyethylene ether, ethylene oxide poly Oxypropane copolymers and the like. Cationic surfactants are generally not used, and less amphoteric surfactants are used.

Some of the above surfactants meet environmental protection requirements, and some do not meet environmental requirements. For example, in the manufacture of scouring agents or detergents, nonylphenol polyoxyethylene ether (TX-10) or t-octylphenol polyoxyethylene is often added. Tritonx-100, both of which are non-ionic surfactants, are inherently less toxic (LD=10(4e)-5x10(4e4)mg/kg) but have poor biodegradability (degradation rate). 0 to 9%) Once the biodegradation of 1-2 oxyethylene metabolites is more toxic than undegraded nonyl phenol ethoxylates, the ultimate toxicity is reduced to alkyl phenols (LC50 for fish toxicity is 3 mg/L). Kg). In 1988, Denmark and Switzerland passed the ban of the law, and Germany has long announced the ban on sales. Alkylphenols have also been listed as one of the 70 types of environmental hormones (also known as endocrine disrupting chemicals) that are restricted in the international market. For example, imported scouring agents Leophen U.M (BASF), Kielalan series scouring agent and domestic scouring agent PD-820 all contain nonyl phenol polyoxyethylene ether. Therefore, in the development of environment-friendly auxiliaries, it is necessary to minimize or minimize the use of thiols. Phenol polyoxyethylene ether. However, it is very regrettable that domestic large-scale chemical plants are still in production, and some imported auxiliaries containing nonylphenol are still used in printing and dyeing plants. Among anionic surfactants, sodium dodecylbenzenesulfonate (ABS) is widely used and widely used, and is one of the main raw materials for preparation of scouring agents, detergents, and the like.

ABS produced from tetrapropylene has alkyl groups with more branches, and this branched ABS is not easily biodegradable. Non-branched linear ABS, good biodegradability J (degradation rate 55%), but benzene in the degradation process, harmful to fish and aquatic organisms (fish toxicity LC50 4mg/kg), will be classified as banned . In some detergents, a certain amount of sodium tripolyphosphate (ST) is often added as a builder, and urea is added as a cosolvent. Both materials are non-toxic, and phosphorus and nitrogen compounds are essential nutrients for biological growth on earth. However, a large amount of phosphorus and nitrogen compounds flow into rivers, which can make the river water eutrophic, causing rapid growth and reproduction of algae and plankton, causing the dissolved oxygen in the water to decline, the water quality to deteriorate, and causing a large number of deaths of fish and aquatic organisms. For this reason, the amount of STPP and urea should be controlled as far as possible in the production of additives, and as much as possible, phosphorus-free products should be produced. The 4A zeolite, sodium metasilicate and methyl glycine diacetic acid (MGDA) can generally be substituted. Some oxygen bleach stabilizers use phosphorus-containing raw materials, and can affect the increase of load in the discharged sewage, and should be given sufficient attention. In wool detergents, some detergents include a net lotion LS. Although the effect of hair washing can be improved, LS contains carbamate, which is carcinogenic and has been listed as banned.

In recent years, some penetrants and scouring agents have been added with phosphoric acid cool salts in order to increase the permeation effect. Some people think that the product has good biodegradability and no toxicity. However, the pollution problem of phosphorus-containing products has caused concern in the society. A recent report shows that the European Commission (EC) requires the return of sportswear sold by the American Nike Company to Western Europe on the grounds that the product contains Phosphate vinegar and can affect the human endocrine system. . This shows that phosphorus products are environmentally friendly products and should be treated with caution. Some oxygen bleach stabilizers and chelating dispersants still use organic chelating agents such as nitrilotriacetic acid (NTA), diethylenetriamine pentaacetic acid (DTPA), EDTA, etc. as the main raw materials, such as oxygen bleaching stabilizer AR-750. ED-TA, magnesium chloride and other components, although this kind of stabilizer has a certain effect, but the biodegradability is very poor, long before being banned abroad.


Linear Alkyl Benzene Sulphonic Acid (LABSA), Brown liquid, Molecular Formula: C18H30O3S, Trade Nam Sulfonic Acid, Melting Point 10°C, Density 1.06g/ml, Class 8 chemical,it is a largest volume surfactant because of its low cost, good performance; environmental friendliness .For the production of sulfonic acid, LABSA, alkaline benzene linear sulfation is usually used. Its components: linear alkyl benzene, oxygen, sulfur and citric acid.
Linear Alkyl Benzene Sulphonic Acid is a batch of organic sulfur compounds that are used in most home detergents, dishwashing detergents, detergent powder, cleaning powder, washing powders, detergent cake, liquid soap, soaps etc. LABSA, sulfonic acid compound is used as a foaming agent , cleaning agent in more formulations and toilet soaps for foaming. Sulfonic acid, LABSA is using in detergent industries, in textile industry as a washing agent, pesticides industries to improve the quality of spray. Sulfonic acid, LABSA is not inflammable substance and can dissolve in water, but not in organic solvent.
Application detail:
 In hair shampoo, bath shampoo, dish detergents and complex soap, laundry powder, dishware cleaner in daily chemical industry.
 it is also used in wetting and clearer , dyeing assistant in textile industry.
 Degrease agent in electroplate and leather manufacture.
 De-inking agent in paper making.

Alkyl Benzene Sulphonate, Alkyl Benzene Sulphonic Acid, Linear Alkyl Benzene Sulphonic Acid, Linear Alkyl Benzene Sulphonic Acid Detergent
Plastic Materials Co., Ltd. http://www.hnchromiumoxidegreen.com