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Silicone Softener RUISOFT BT57

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Product Description

RUISOFT BT57 is a silicone terpolymer with polyether-amino-functional groups and other traditional chemical entities. RUISOFT BT57 delivers a voluminous, soft, smooth hand and excellent hydrophilicity to fabrics. It greatly improves the wear comfort of textiles, especially suitable for soft finishing of cotton, and also has hydrophilicity on polyester fabrics. It bonds strongly to the fiber surface, which leads to good exhaustibility and wash resistance.

Features and Advantages

● Excellent hydrophilicity

● Nearly no yellowing change

● Excellent voluminous, soft and smooth hand feel

● Good durability

● Good compatibility

● Can be applied for all kinds of fabrics

● Improve the hydrophilicity of chemical fabrics

● Excellent chemical stability, can resist high temperature, salt and pH

Technical Index

Property  Specification
Appearance  Yellowish transparent liquid
Solid content, %  80-85%
pH value  4.0-6.0
Ionic  Weakly cationic


RUISOFT BT57 can be used for hydrophilic treatment of most fabrics. On hydrophilic substrates such as cellulosics, the hydrophilicity is not affected, whereas

hydrophobic substrates such as polyester usually have a clear improvement in wetting properties. And the best performance will be achieved when applied on terry cloth and knitted cotton.

RUISOFT BT57 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 BT57  20.0g
TO-5  2.0g
TO-7  2.0g
Glacial acetic acid  0.6 g
Water  75.4g


1. Add RUISOFT BT57 and emulsifier in the container, start to stir for 5-10 minutes.

2. Premix acetic acid (or sodium acetate) 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


Follow dosage is calculated on concentration of 10% solid content, only for reference

  Padding process  Exhaustion process
Dosage  5 ~ 30g/l  1~ 3%(o.w.f.)
Pick up  --   --
pH  5.0 ~ 7.0  5.0 ~ 7.0
Temp.  Ambient temperature   40-50℃
Time  --   20 ~ 30 min
Dry  160 °C -170℃  110-150℃

Performance comparison

The products are subjected to the form of micro-emulsion,following the proportion of solid around 10% in the emulsion. The samples are applied in concentrations of 3% by exhaust on cotton and 1% on polyester.

Fabric  Softness  Hydrophilicity (s)   Whiteness
Knitted cotton   7.5  Instant   74.97
Woven cotton  8.0  3.44   64.89
Knitted polyester  7.5  14.69   80.08
Woven polyester  7.0  Not hydrophobic   77.31 

Alkali resistant stability

To realize the salt resistant stability test we use 1.2g/l NaOH (pH=12) and 20g/l RUISOFT BT57 in 200ml bath. The following pictures are the results of the test.

25℃70℃ Result



After 3 hours of heating,

BT57 is semitransparent

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 BT57 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,but lots of foam produced


RUISOFT BT57 is available in 50kg or 130kg plastic drums or other packing on request.


Transport as non-hazardous chemicals. Store in original container only.

Keep container tightly closed and store in a cool, well ventilated place.

Shelf life

Original characteristics remain intact for 12 months, if kept in recommended storage