Silicone Water Repellent

Introduction

POWSIL™-60100 is two components & non-fluorinated water repellent finishing agent.

Benefits

• Provide excellent water repellence, virtually comparable with the best industry standard;

• Contains no PFOS (Perfluoro-octane sulfonic acid), PFOA (Perfluoro-octanoic acid), APEO (Alkyl phenol ethoxylate);

• Impart durable water-repellent effect on cotton fabrics even after multiple 30 home laundry cycles, typically outperforms industry standard;

• Impart superior smoothness and softness on all types of fabrics;

• The system is stable for 48 hours at bath pH 4 - 10, giving a long pot - life;

• It is readily applied, typical dry/cure conditions are applicable. Optimum performance is achieved by drying at 130°Cx2min followed by 160°Cx1-2min;

• Water dispersible, easy-to-use in any type of finishing process;

• Can be applied by both bath-padding & exhausting process;

• Can be combined with a typical fluorocarbon water-repellent to provide moderate oil/stain repellence.

Typical Physical Properties

Application

POWSIL™-60100 is two components non fluorine–based water repellent system. For effective results, it is essential to co-apply POWSIL™ 60100 Part A with POWSIL™- 60100 Part B in the finishing bath. Extensive lab tests have demonstrated that this blend in the bath remains stable for up to 48 hours within a pH range of 4 - 10. The versatility of this blend allows it to be applied through various common methods, including padding, exhaustion, and spraying.

• Dosage level:

Optimum dosage levels of POWSIL™-60100 Part A & Part B are based on the type of fabric and the level of performance required. 10~30 g/l of POWSIL™-60100 Part A blended with 3~9 g/l of POWSIL™-60100 Part B are generally recommended. The optimized ratio of POWSIL™ 60100 Part A & Part B is 10:3.

As a starting point, it is suggested to use 10g/l of POWSIL™-60100 Part A co-applied with 3g/l of POWSIL™-60100 Part B in a bath for thin fabric. For thick fabric, the recommended dosage is 20g/l of POWSIL™ 60100 Part A and 6g/l of POWSIL™-60100 Part B. However, these dosage levels can be adjusted to achieve the desired performance.

It is also important to rinse the fabric thoroughly before applying POWSIL™-60100 to remove all chemical residues.

• 1. Bath Solution pH for POWSIL™-60100

The bath solution pH 6-8 is typically recommended. The typical bath pH is 7.5. Bath pH can be adjusted by acetic acid or sodium hydroxide (10%).

• 2. Drying & Curing Conditions

There is no special requirements for the drying and curing conditions or equipment. The commonly used drying and curing conditions are mostly applicable for POWSIL™-60100. Optimum performance can be achieved by drying at 100~130°C for 2min followed by 150~170°C for 1min.

• 3. Combination with a Water-Repellent Fluorocarbon

A typical water-repellent fluorocarbon can be co-applied with POWSIL™-60100 in a finishing bath to enhance water repellence while also achieving moderate oil/stain repellence. It is recommended to conduct lab tests to determine the optimal conditions and bath ratios for this combination in order to achieve the desired performance.

The initial bath formulation for the combination can consist of 10 parts of POWSIL™-

60100 Part A, 3 parts of POWSIL™-60100 Part B, and 3 parts of a typical water-repellent fluorocarbon (30% solid).

If necessary, pre-blending POWSIL™-60100 Part A with a typical water-repellent fluorocarbon (30% solid) can be a viable alternative. In such a scenario, the blend should be co-applied with POWSIL™-60100 Part B in the finishing bath.

For optimal results, it is advisable to utilize a water-repellent fluorocarbon (30% solid) which contains no extenders, such as paraffin wax emulsions or polyethylene wax emulsions. Prior to implementation, the compatibility of the blend should be assessed through lab testing to ensure smooth and problem-free operations.

SAMPLE RECIPES

• 1. Exhausting process:

Bath solution (liquid ratio 1:10) →· dipping fabric into bath solution (35°C, 40 min) →spinning → drying → overnight conditioning→Water repellency testing (AATCC-22).

Cotton knitted fabric:

2.0% (o.w.f.) for thin fabric

3.0% (o.w.f.) for thick fabric

• 2. Bath-padding process

Bath solution → Dried fabric → One dipping + one padding(3.0kg/cm²) → Heat setting (170 °C for 2 min) → Overnight conditioning → Water repellence evaluation (AATCC-22).

Cotton knitted fabric:

20g/l of POWSIL™-60100 Part A & 9g/l of POWSIL™-60100 Part B for thin knitted fabric

30g/l of POWSIL™-60100 Part A & 6g/l of POWSIL™-60100 Part B for thick fabric

• 3.Spraying

Bath solution → Spraying on fabric or garments → Drying & curing at 130-170 °C

20g/l of POWSIL™-60100 Part A & 9g/l of POWSIL™-60100 Part B for thin knitted fabric

30g/l of POWSIL™-60100 Part A & 6g/l of POWSIL™-60100 Part B for thick fabric

WASHING DURABILITY

Results of 30 times washing cycles

Dosages & Washing Durability

Drying at 130 °C for 2 min and then cueing at 160 °C for 1 min

Water repellency: AATCC-22

Home laundry: AATCC-135

STRIPPING

To strip off the treated fabrics such as cotton, CVC, Nylon, PE, the following conditions are applied.

NaOH (30%): 7g/l

Stripping agent: 7g/l

Liquid Ration: 1:7-10

100 °C for 40 min