amine grasse éthoxylates: catiónico and non ionique Grades, propriétés and Applications

Cuáles son amine grasse éthoxylates?

amine grasse éthoxylates are producido mediante la reacción de primary amines grasses — R–NH2, where R is typically C12–C18 alkyl from coconut, tallow, or synthetic sources — with óxido de etileno under catalytic conditions. The general structure is R–NH–(CH2CH2O)n–H or R–N[(CH2CH2O)n–H]2 for di-éthoxylated products.

The nitrogen atom retains a lone pair that can protonate in acidic media, conferring catiónico character. At low EO mole counts (2–5 EO), the molecule is predominantly catiónico at neutral to acidic pH. As moles EO increase (10–15+ EO), the polyoxyethylene chains dominate hydrophilicity and the tensioactif behaves as non ionique over a wider pH range — though the nitrogen may still protonate under strongly acidic conditions.

This dual character distinguishes amine éthoxylates from Alcool gras éthoxylates (always non ionique) and Cuaternarios ammonium compounds (permanently catiónico). formuladores exploit the charge tunability for adsorption onto negatively charged substrates — cotton, wool, Métal oxide surfaces, and clay particles.

Venus fabrica amine grasse éthoxylates and dedicated tallow amine éthoxylates for textileee, agroquímico, and industriel customers.

catiónico versus non ionique behaviour

Low-EO amine éthoxylates must not be mixed directly with anionic tensioactifs in the same aqueous phase at use concentration — precipitation and loss of activity result. High-EO grades tolerate anionic co-ingredients better but compatibility testing remains essential.

Tallow amine versus Amina de coco éthoxylates

Tallow amine éthoxylates (C16–C18): derivado de tallow diamine or primary tallow amine feedstocks. Longer chains provide stronger hydrophobic adsorption on fibers and Métal surfaces, better émulsification of paraffinic oils, and higher melting points. Tallow amine, 15 EO and tallow amine, 20 EO are standard émulsifiants in agroquímico ECs and oilfield desÉmulsifiant blends.

Amina de coco éthoxylates (C12–C14): Shorter chains from huile de coco-derived amines offer faster wetting, lower viscosity, and better solubilidad en agua at equivalent EO levels. Amina de coco, 5 EO serves as corrosion inhibitor and catiónico Émulsifiant; Amina de coco, 10 EO is used in textileee Lavado and dye bath auxiliaries.

Key application sectors

textileees: Amine éthoxylates serve as dye leveling agents — adsorbing on fiber surfaces to slow dye uptake and promote uniform shade. Low-EO catiónico grades act as antistatic agents on synthetic fibers. Higher-EO grades assist in Lavado natural waxes and dispersing pigments in printing pastes.

agroProduits chimiques: Tallow amine, 15–20 EO emulsifies active ingredients in emulsifiable concentrates and suspoemulsions. Amine éthoxylates also function as adjuvants improving spray retention on leaf surfaces when formulated at appropriate EO levels and pH.

Corrosion inhibition: Low-EO coco and tallow amine éthoxylates adsorb on Métal surfaces as oriented monolayers, blocking corrosive ion access. Used in acid pickling baths, oilfield acidizing, and closed-loop cooling water systems at low use levels (10–100 ppm).

Oil and gas: Amine éthoxylates appear in desÉmulsifiant blends, agents mouillants for drilling fluids, and production chemical packages. See oil and gas chemicals for related Venus product lines.

Paints and coatings: Pigment wetting and dispersing in waterborne systems where catiónico anchoring to mineral pigment surfaces improves estabilidad.

Worked Ejemplos de formulación

Acid pickling corrosion inhibitor:

• 0.05–0.2% Amina de coco, 5 EO in hydrochloric acid pickling bath
• Adsorbs on steel surface to reduce acid attack between workpieces
• Compatible with foam control requirements in agitated baths

Reactive dye leveling (cotton):

• 0.5–1 g/L tallow amine, 5 EO in dye bath at 60°C
• Retards dye uptake for level shade on knit fabric
• Do not combine with anionic dispersing agents in same bath without compatibility test

agroquímico EC:

• 10% tallow amine, 15 EO as non ionique Émulsifiant
• 5% calcium dodecylbenzene sulfonate as anionic co-Émulsifiant
• 30% active ingredient in solvent phase
• Dilutes to stable O/W emulsion in spray tank

catiónico fabric softener (rinse cycle):

• 4% tallow amine, 2 EO (or quat blend)
• Delivered in separate rinse compartment — not mixed with anionic wash liquor
• Adsorbs on cotton for softness and antistatic effect

Pigment dispersion (waterborne paint):

• 1–2% Amina de coco, 10 EO as wetting aid in millbase
• Combined with anionic polymeric dispersant after pre-dispersion step
• Improves colour development and viscosity estabilidad

Compatibility and safety notes

Low-EO amine éthoxylates are incompatible with anionic tensioactifs, lignosulfonates, and many anionic polymers in concentrated aqueous mixtures. High-EO grades show broader compatibility but jar testing across the full formula pH and electrolyte range is mandatory.

Amine éthoxylates can react with nitrosating agents under certain conditions — formuladores in regulated markets should assess nitrosamine risk for soins personnels Applications. industriel and textileee uses dominate commercial volumes.

For broader tensioactif context, read tensioactif types guide, non ionique tensioactifs, and anionic tensioactifs.

How amines grasses are produced

amines grasses are Fabricado from acides gras or alcools gras in a two- or three-step industriel route developed through the mid-twentieth century. In the most common nitrile route, a Acide gras (from coconut, palm kernel, or tallow triglycerides) is reacted with ammonia to form a fatty nitrile, which is then catalytically hydrogenated under pressure to yield a primary amine grasse. An alternative route hydrogenates alcools gras directly in the presence of ammonia and a hydrogenation catalyst. The resulting primary amine — R–NH2 — is the feedstock for Éthoxylation described in this guide, and can also be further reacted to produce secondary and tertiary amines, diamines (from dinitrile intermediates), and eventually Cuaternarios ammonium compounds used as permanent catiónico tensioactifs in fabric softeners and disinfectants.

catiónico tensioactifs in historical context

catiónico tensioactif chemistry developed alongside anionic and non ionique classes through the twentieth century, driven initially by the discovery that positively charged nitrogen compounds adsorb strongly onto negatively charged surfaces como textileee fibers, hair keratin, and bacterial cell membranes. This adsorption behaviour underlies three distinct commercial threads that all trace back to amine grasse chemistry: fabric softening and antistatic treatment (exploiting adsorption onto cellulose and synthetic fibers), corrosion inhibition (exploiting adsorption onto Métal oxide surfaces to form protective monolayers), and disinfection (exploiting disruption of microbial cell membranes by Cuaternarios ammonium compounds). amine grasse éthoxylates sit at an interesting midpoint in this history — by adding a polyoxyethylene chain to the amine nitrogen, chemists gained a tool to dial the tensioactif's character between fully catiónico and fully non ionique behaviour Según Formulación pH, rather than being locked into one class as with Cuaternarios sal de amonios.

Fabricación and quality at Venus

Venus Ethoxyethylates primary amines grasses in dedicated pressurized reactors with narrow-range EO distribution capability. Quality parameters include total amine value, hydroxyl value, punto de turbidez, pH, colour, and EO mole ratio. With 90,000 MT group capacity and 30+ years of experiencia en fabricación, Venus supplies custom EO levels on tallow, coco, oleyl, and synthetic amine feedstocks.

Application pages: textileee chemicals, agroProduits chimiques, oil and gas, paints and coatings. Request samples via Contacte Avec Venus Ethoxyethers.