Double-ended hydroxypropyl silicone oil IOTA 2030 represents a specialized class of linear organofunctional polysiloxanes, distinguished by reactive primary hydroxyl (-OH) groups positioned at both ends of its silicone backbone. This unique bifunctional structure makes it a crucial building block for synthesizing advanced silicone-polyurethane or silicone-polyester block copolymers, serving as its primary purpose.

Core Properties and Design:
IOTA 2030 is supplied as a colorless to yellow transparent oily liquid with an active ingredient content ≥90%. It is available in a range of molecular weights (500 to 4300 g/mol), directly impacting its key physical characteristics:

• Viscosity: Ranges from 21 cSt (IOTA 2030-5) to 80 cSt (IOTA 2030-40), increasing predictably with molecular weight.

• Hydroxyl Content: Decreases from 4.5% (lowest MW) to 0.8% (highest MW), reflecting the concentration of reactive end groups per unit mass.

• Refractive Index: Slightly decreases with increasing molecular weight (1.4192 to 1.4082 at 25°C).

Key Functional Advantages:
When incorporated into polymers via its hydroxyl groups, IOTA 2030 imparts significant performance enhancements:

1. Enhanced Flexibility: Improves low-temperature flexibility and reduces brittleness.

2. Improved Processing: Contributes to excellent processing fluidity.

3. Surface Activity & Release: Leverages the inherent migration tendency (auto-trending effect) of silicones to provide outstanding non-stick properties, isolation, and release performance. This is fundamental to its use as a release agent.

4. Thermal Stability: Enhances the temperature resistance of the host polymer.

5. Durability: Improves wear resistance.

Primary Applications:

1. Synthesis of Silicone-Hybrid Polymers: The primary function. Reacts with isocyanates (for PU) or acids/anhydrides (for polyesters) to form block copolymers, combining silicone properties (release, slip, heat stability) with the strength and versatility of organic polymers.

2. Anti-Graffiti Coatings: Used as a modifier in solvent-based anti-graffiti paints (especially with esters, ketones, alcohols). It imparts marking pen resistance and a peelable effect, facilitating graffiti removal. Its limited compatibility with aromatic hydrocarbons needs consideration.

3. High-Performance Release Agents: Functions exceptionally well as an internal release agent or mold release agent (recommended dosage 3-20%) in applications like silicone rubber, polyurethane processing, and coatings, leveraging its excellent migration and non-stick properties.

Usage Guidance:

• For polymer modification, typically 3% to 30% is added, partially replacing the polyol in the original formulation. The exact amount depends on the desired balance of properties.

• For release applications, 3-20% is commonly effective.

• Custom molecular weights/viscosities beyond the standard range (2030-5 to 2030-40) can be produced to meet specific application needs.

In summary, IOTA 2030 hydroxypropyl silicone oil is a versatile, reactive modifier essential for creating high-performance silicone-organic hybrid materials. Its ability to enhance flexibility, processing, surface release, temperature resistance, and durability, coupled with its specific functionality in anti-graffiti systems and as a release agent, makes it a valuable tool in advanced polymer formulation.