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Hydrophilic Silicone Softener QSS

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Product Description

RUISOFT QSS is a linear block silicone copolymer,with quat, polyether functional groups and other traditional chemical entities. RUISOFT QSS delivers a hydrophilic,soft and voluminous hand to all kinds of fabrics,but is particular suitable for natural fiber and yarns. After the treatment of RUISOFT QSS, the fabric still maintain their original hand characteristics, of which amount is less than other traditional softener.

Features and Advantages

  • Provides soft and voluminous hand feel

  • Moderate smoothness,nature feel,not oily

  • Good hydrophilicity 

  • Increases the hydrophilicity of synthetic fiber 

  • Easy to emulsify, good emulsion stability

  • Excellent chemical stability,can resist high temperature, salt, PH and high shear

  • Causes little yellowing and color change of white or light color fabrics

  • NO APEO, environmentally

Technical Index




 Colorless to slightly yellow liquid  

 Solid content, %




 Viscosity (mpa.s, 25℃) 


 Gravity (g/cm3)



RUISOFT QSS can be used for all kinds of fabrics. But the best performance will be achieved when applying to following fibers, such as cotton, cotton blends, wool, wool blends, viscose, rayon, acetate and polyester woven.

RUISOFT QSS should be emulsified before applying in textile finish process. It is easier to be emulsified than other traditional silicone oil for textile softener. Normal equipment and emulsifier can meet the requirement.

RUISOFT QSS can be applied by padding and impregnation finishing. The emulsion is extreme stable in a wide PH range, high temperature or high concentrations of salts. Also, it will not stick to rollers. As a result, RUISOFT QSS can be used in special conditions. 

Because of its cationic structure, RUISOFT QSS has limited compatibility with anionic auxiliaries. Compatibility tests should be carried out before it is used together with other chemicals.

Formulation (20% emulsion) 

  • RUISOFT QSS                                                   23.5g

  • Tridecyl Alcohol 6 EO Ethoxylate                     5g

  • Acetic acid                                                        0.3g

  • Water                                                               70.2 g 


1. Add RUISOFT QSS and emulsifier in the container, start to stir for 5-10 minutes. 

2. Premix acetic acid and water.

3. Slowly add the acidic water while continuously stirring mixture in the container. Stop adding the acidic water occasionally to ensure the water is well taken into the grease.

4. Clear micro-emulsion should be obtained at end of this procedure


 Padding process

 Exhaustion process


 10 ~ 30g/l

 1.0~ 3.0%(o.w.f.)

 Liquor ratio 



 Pick up




 5.0 ~ 6.0

 5.0 ~ 6.0


 Ambient temperature 

 Ambient temperature 



 20~ 30 min


 160 °C for 2min

 160 ºC for 2mi

Performance Comparison

The products are subjected to the form of micro-emulsion,following the proportion of oil around 20% in the emulsion. The samples are applied in concentrations of 25 grams per liter on cotton.






 Color change(%) 


 Knitted cotton 




Salt resistant stability

To realize the salt resistant stability test we use 10g/l Na2SO4 and 20g/l RUISOFT QSS in 200ml bath. The following pictures are the results of the test.








After 3 hours of heating, 

QSS is opacity,

but no oil floating

Shear resistant stability

To realize the shear resistant stability test we use 0.5g/l Na2CO3, 1g/l Na2SO4, 0.1g/l reactive dye and 50g/l RUISOFT QSS in 200ml bath. The stirring speed is 2000r/min,and the temperature is 50℃. The following pictures are the results of the test.






 No silicone oil droplets or silicone residue are observed