MY 20571 is an acrylate-modified ethyl silicone oil (viscosity 200–500 CST, freezing point below −75°C) with acryloxypropyl functionality adjustable to user requirements. Specifications, properties and evaluation steps.

Body:

Most silicone oils work as additives — they improve the formula but stay separate from the cured network. When the silicone must become part of the film itself, you need a reactive grade.

MY 20571 is an acrylate-modified polymethylethylsiloxane: silicone fluid with acryloxypropyl functionality that can participate in curing reactions.

1. What Is MY 20571?

Published specifications:

Two stated properties set it apart:

• Tunable functionality. The content of acryloxypropyl functional groups is adjusted according to user requirements — the reactivity level follows your formulation, not the other way round.

• Extreme low-temperature backbone. Polymethylethylsiloxane has a Tg of −143°C, giving excellent low-temperature flexibility to the cured segment.

• Chemical stability. No chemical reaction with strong acids and alkalis (except concentrated sulfuric and hydrofluoric acids).

2. Where Does a Reactive Grade Fit?

Wherever silicone properties must survive inside a cured film or network rather than sit on top of it: radiation-curable and peroxide-cured coating systems, release films with anchored silicone layers, and specialty elastomer formulations where a low-Tg, chemically stable segment is required. The specific fit must be confirmed by trial in your curing system.

3. How Should You Evaluate It?

1. Define the target functionality level — the acryloxypropyl content is adjustable, so start from your cure chemistry.

1. Request the matching grade and run it against your current component at equal loading.

1. Compare gel fraction, film flexibility (especially at low temperature) and surface properties after cure.

1. Confirm storage behavior: the product ships as non-dangerous goods with a 24-month shelf life.

FAQ

1. Can the acrylate content be customized?

Yes — the acryloxypropyl functional group content is adjusted according to user requirements. Final parameters are confirmed through technical documentation.

2. How does it behave in cold service?

The backbone polymer has a Tg of −143°C and the fluid's freezing point is below −75°C — flexibility at low temperature is a core property, to be verified in your cured system.

Conclusion: when silicone must react into the network instead of migrating out of it, MY 20571 provides the reactive handle — with the content tuned to your formula.

Related product: Acrylate modified ethyl silicone oil MY 20571