Sodium Polypropoxypolyethoxydodecyl Sulfate
Time: 2012-09-27 17:17:34
Sodium Polypropoxypolyethoxydodecyl Sulfate
Synonyms
Sodium polypropoxypolyethoxylauryl sulfate;
Oxirane, methyl-, polymer with oxirane, mono(hydrogen sulfate), dodecyl ether, sodium salt;
Category
Anionic Surfactant
>> Sulfate
>> Alcohol Polyether Sulfate
>> Alcohol Polyoxypropylene Polyoxyethylene Ether Sulfate
>> Linear Alkanol Polyoxypropylene Polyoxyethylene Ether Sulfate
Chemical Numbering System
CASRN65423-83-8
EINECSN/A
Molecular Formula & Molecular Weight
Molecular Formula: (C3H6O.C2H4O)x.C12H26O4S.Na
Molecular Weight: N/A
Structure
Schematic formula:
 
Properties
Appearance    liquid to solid.
Odor    faint characteristic odor.
Solubility    slightly soluble to soluble in water. The solubility varies with EO/PO value.
Stability    stable in alkali, weak acid and hard water; unstable in strong acid, easily hydrolyzes.
Risk    irritation, irritation to skin, eye.
GHS (Rev.6) label:
Ecology    may be hazardous to environment. Water body should be given special attention.
Biodegradability    biodegradable.
Characteristics    excellent cleansing, foaming, emulsifying, wetting, dispersing, solubilizing abilities. Resistant to hard water. Good compatibility with anionic surfactants, non-ionic surfactants. Foaming performance is unaffected by water hardness. In the synthesis reaction, order of addition of monomers has a significant effect on the performance.
Note    (1), 1,4-dioxane generated during preparation: probable carcinogen. However, can be acceptable when concentration of 1,4-dioxane is less than 30ppm or less.
Synthesis
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
1. Synthesis of polyether
Obtain by polymerization reaction of lauryl alcohol and ethylene oxide, propylene oxide.
For further information, see:
US patent 4,967,017 Alcohol ethoxylates of reduced EO content or residual PO content; US patent 7,528,288 Method for production of polyether alcohols (mainly describe the synthesis of polyether polyols); US patent 7,348,460 Method for producing alkanol alkoxylates at optimal reaction temperatures; US patent 7,268,259 Random fatty alcohol alkoxylates with low temperature stability, and methods of producing and using the same, etc.
2. Synthesis of sulfate
Lauryl alcohol polyoxypropylene polyoxyethylene ether and sulfur trioxide react through reactor, then sodium hydroxide neutralizes, finally obtain product.
US patent 8,921,588 (Process for preparing sulfates and/or sulfonates in a micro-reaction system) presents a synthetic process. Conditions: mole ratio of sulfur trioxide and polyethers or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Actives, %, ≥
10.0*
Ethanol insoluble materials, %, ≤
2.0
pH (25°C, 5% solution)
6.5 - 9.5
Color, Klett, 5% solution, ≤
120
Density, g/mL, 25°C, approx
1.05 (Liquid)
1,4-Dioxane, ppm, ≤
30
*: Often with other ingredients, appear in the form of a mixture.
Test Methods
(1), Actives
GB/T 5173 Surface active agents and detergents-Determination of anionic-active matter by direct two-phase titration procedure
ISO 2271 Surface active agents -- Detergents -- Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure
(2), Ethanol insoluble materials
GB/T 13173 Surface active agents - Detergents - Testing methods
(3), pH
GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method
ISO 4316 Surface active agents -- Determination of pH of aqueous solutions -- Potentiometric method
(4), Color (Klett)
GB/T 8447 Industrial linear alkylbenzene sulfonic acid, Appendix A
(5), Density
GB/T 4472 Determination of density and relative density for chemical products
ISO 758 Liquid chemical products for industrial use -- Determination of density at 20 degrees C
(6), 1,4-Dioxane
GB/T 26388 Determination of dioxane residues in surfactants - Gas chromatographic method
ISO 17280 Surface active agents -- Determination of 1,4-dioxan residues in surfactants obtained from epoxyethane by gas chromatography
2. Hazardous substances indexes
Item
Hazardous substances indexes
Heavy metals (as Pb), mg/Kg, ≤
20
As, mg/Kg, ≤
3
Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents - Determination of heavy metals
(2), As
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30797 The test method of food detergents - Determination of total arsenic
3. Further explanation
(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.
Major Uses
1. Typical applications
Use as emulsifying agent, dispersing agent.
Use as foaming agent.
Use as solubilizing agent.
Use as cleansing agent.
Use as antifoaming agent.
2. Household detergents
Use as cleansing agent, emulsifying agent, solubilizing agent.
3. Industrial cleaning agents
Use as cleansing agent, emulsifying agent, dispersing agent.
4. Textile, printing and dyeing
Use as high-temperature leveling agent, wetting agent.
5. Emulsion polymerization
Emulsifier, particle size controlling agent in emulsion polymerization.
Product members
 
Manufacturers
 
Update: 20131021(1); 20170110(2);