Formulation Card
FC-7.1-M
Medium Softener
mediumSource: Chapter 7 §7.2.2
Ingredients
| Component | INCI / Chemical Name | % w/w | Function |
|---|---|---|---|
| Esterquat active (90% aq.) | Di(palmiticcarboxyethyl)hydroxyethyl methyl ammonium methylsulfate | 11.20 | Cationic softening active |
| Cationic thickener | Polyquaternium-33 (and) C13-14 isoparaffin (and) laureth-7 | 0.80 | Rheology modification |
| Perfume microcapsules | Melamine-formaldehyde encapsulated fragrance (30% solids) | 1.30 | Extended fragrance release |
| Free fragrance | Fragrance (proprietary blend) | 0.40 | Initial scent |
| Dispersing aid | Laureth-7 | 0.20 | Vesicle stabilization |
| Colorant (CI 42090) | Acid Blue 9 | 0.001 | Visual identity |
| Preservative | 1,2-Benzisothiazolin-3-one (20% aq.) | 0.03 | Microbial stability |
| Calcium chloride solution (25%) | Calcium chloride | 0.04 | Viscosity control |
| Deionized water | Aqua | 86.03 | Solvent / dispersion medium |
| pH adjuster | Lactic acid | q.s. to pH 2.8–3.2 | Esterquat stability |
| Total | 100.00 |
Addition Order & Process
Manufacturing procedure: Prepare the esterquat dispersion as for FC-7.1-E . Add calcium chloride slowly to reduce viscosity to 300–400 cP. Predisperse cationic thickener in water at 40 °C, then add with moderate shear. Add laureth-7 and mix 10 minutes. Incorporate perfume microcapsules at reduced shear (paddle mixer, 200 rpm). Add free fragrance, colorant, and preservative. Adjust pH to 2.8–3.2 .
Expected Parameters
Key parameters: Active matter 10.1% ± 0.4%; total fragrance 0.79%; viscosity 300–450 cP (Brookfield LVT, 25 °C); pH 2.8–3.2 . Encapsulated fragrance delivers scent bursts upon fabric friction, extending freshness to 5–7 days versus 1–2 days for free fragrance alone .
Formulation Notes
The medium-grade softener increases esterquat loading to the 10–12% range, incorporates fragrance encapsulation for extended scent release, and employs a cationic rheology modifier to build a viscosity profile perceived as more luxurious by consumers.