What are the main components of alkali-resistant penetrant AEP?

The main component of alkali-resistant penetrant AEP is fatty alcohol polyoxyethylene ether phosphate (CAS number: 68439-39-4), which is an anionic surfactant with the general formula RO(CH2CH2O)nPO3H2 (R = C12-14 alkyl, n ≈ 9).

Detailed Description

Alkali-resistant penetrant AEP is prepared by starting with C12-14 fatty alcohol, subjecting it to ethoxylation (adding about 9 ethylene oxide molecules), and then performing phosphation to produce a mixture of alkyl ether phosphates. This product is not a single compound but a functional anionic surfactant mainly composed of monoalkyl phosphate and dialkyl phosphate, with the monoalkyl phosphate content ≥50% and dialkyl phosphate content ranging from 20% to 40%. The synergistic effect of these two components endows the product with excellent penetration, wetting, and alkali resistance.

The product has an extremely high active ingredient content (solid content ≥98%, active content ≥98.0%), making it a high-purity concentrated product. The molecular structure contains both hydrophilic polyoxyethylene ether segments and phosphate groups, as well as a lipophilic long-chain alkyl group (C12-14). This unique molecular design enables it to maintain chemical stability under strong alkali conditions of up to 200g/L NaOH, with no decrease in penetrating power, far surpassing ordinary nonionic or anionic penetrants.

Technical Parameters

(Data source: Guoli Chemical Product Database)

Application Recommendations

Thanks to the synergistic ratio of monoalkyl and dialkyl phosphates and its excellent alkali resistance stability, alkali-resistant penetrant AEP is particularly suitable for the following high-alkali working conditions:

• Textile Dyeing and Finishing: One-bath scouring and bleaching of cotton fabric with alkali and hydrogen peroxide, mercerizing penetration, cold pad-batch pretreatment. Recommended dosage: 2~5g/L.
• Metal Cleaning: Used as a core penetrating component in alkaline degreasers, combined with sodium hydroxide/sodium carbonate to enhance oil removal efficiency.
• Leather/Papermaking: Used as a soaking aid and alkaline cooking penetrant to accelerate the diffusion of alkaline working fluids into fibers or hides.

Precautions

• This product is an anionic surfactant. When formulating with cationic auxiliaries, compatibility tests should be conducted to avoid precipitation.
• The product is acidic (pH 5.0~7.0 for a 1% aqueous solution). When preparing alkaline working solutions, it is recommended to first dissolve the alkali agent, then slowly add AEP and stir thoroughly.
• It is hygroscopic. After opening, it should be promptly sealed and stored in a cool, dry place.
• Chemical protective gloves and safety goggles should be worn during operation to avoid direct contact with skin and eyes.