Industrial Silicone and its applications
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Questions and Answers

Which property of silicone antifoam makes it effective at controlling foam

  • High solubility in water
  • Low surface tension and high hydrophobicity (correct)
  • High vapor pressure
  • Strong acidic nature

    • What is a common feature of silicone water repellents that helps in maintaining their performance over time?

  • Ability to form a breathable coating that does not trap moisture (correct)
  • Higher Adhesion to the substrate
  • Oleophobic in nature
  • High Microroughness in the surface.

    • Resil Trade Name for Hexamethyldisiloxane?

  • OMCTS
  • DMV 10 CST
  • HMDS
  • DMV 0.65 CST (correct)

    • Role of the Polyether silicone- Resicare AIC in the OEM and Automobile coating and polish.

    <p>B.Wetting agent in the coating and polish</p> Signup and view all the answers

    Viscosity range of the DMV 350 cst

    <p>335-365( 350±15) cst</p> Signup and view all the answers

    CAS No of DMOH 1000.

    <p>D.70131-67-8</p> Signup and view all the answers

    Difference between Antifoam and Defoam.

    <p>D.Both B&amp;C</p> Signup and view all the answers

    Unit of Amine Value Measured.

    <p>mgKOH/g</p> Signup and view all the answers

    The Resil’s trade Name of 3-Aminopropyl 2- Aminoethyl Methyldimethoxy silane

    <p>AMS 9960</p> Signup and view all the answers

    Which silane is suitable for the polysulfide and Polyurethane sealant

    <p>Both A&amp;B</p> Signup and view all the answers

    Application of the Resilane VTMS in sealant and Adhesive

    <p>All the Above</p> Signup and view all the answers

    What are the silanes used for solvent based epoxy paints?

    <p>BOTH A&amp; B</p> Signup and view all the answers

    Which water repellent can be used for water based paints?

    <p>B.Aquaphobe WR2</p> Signup and view all the answers

    Why Application of MAAS in solar panel application

    <p>Both A&amp;B</p> Signup and view all the answers

    Which of the following is a natural rubber?

    <p>Isoprene</p> Signup and view all the answers

    Applications of Uniwet 3048

    <p>Both A&amp;B</p> Signup and view all the answers

    Does DMOH react with isocyanate and can it be used as binder in PU paints?

    <p>Does not reacts with isocyanate and cannot be used as binder</p> Signup and view all the answers

    Effects of the higher silicone dosage on the coating.

    <p>Both A&amp;B</p> Signup and view all the answers

    Will polydimethylsiloxane cure, what will be the Curing temperature of the silicone.

    <p>A.Will Not Cure But dries</p> Signup and view all the answers

    What is a common advantage of silicone emulsion compared to other mold release agents?

    <p>It provides a uniform coating and reduces mold buildup</p> Signup and view all the answers

    Which is the equivalent of GENIOSIL GF93 in our silane range

    <p>AMS 0570</p> Signup and view all the answers

    What are the effects of excess dosage of silane?

    <p>Both B &amp; C</p> Signup and view all the answers

    Difference between wetting and dispersing?

    <p>Both are different</p> Signup and view all the answers

    Wetting agent functions?

    <p>All the above</p> Signup and view all the answers

    Application of WR1?

    <p>It can be used as primer additive and masonry coatings.</p> Signup and view all the answers

    Study Notes

    Silicone Antifoam Properties

    • Silicone antifoam effectively reduces foam due to its low surface tension and ability to spread quickly on foamy surfaces.
    • The chemical structure of silicone allows it to disrupt the foam formation by destabilizing the air-liquid interface.

    Silicone Water Repellents

    • A common feature of silicone water repellents is their hydrophobic nature, which remains stable over time, enhancing long-term performance.

    Resil Trade Names

    • Hexamethyldisiloxane is marketed under the trade name "Resil."
    • 3-Aminopropyl 2-Aminoethyl Methyldimethoxy silane is also known as "Resil."

    Polyether Silicone in Coatings

    • Resicare AIC serves as a functional additive in OEM and automobile coatings, enhancing surface properties like gloss and durability.

    Viscosity of DMV

    • DMV has a viscosity range of 350 centistokes (cst).

    Chemical Identification

    • The CAS number for DMOH 1000 is not specified directly but should be referenced in safety data sheets.
    • DMOH does not react with isocyanates, making it suitable for use as a binder in polyurethane (PU) paints.

    Silanes for Sealants

    • Polysulfide and polyurethane sealants effectively use silanes for adhesion, with specific formulations varying based on application needs.
    • VTMS (Vinyltrimethoxysilane) is utilized in one-part RTV sealants to enhance adhesion and moisture resistance.

    Silanes in Paints

    • Solvent-based epoxy paints commonly incorporate silanes like aminopropyltriethoxysilane for improved bonding and water resistance.
    • For water-based paints, silicone-modified silanes are recommended to maintain water repellency.

    MAAS in Solar Panels

    • The application of MAAS (Methacryloxypropyltrimethoxysilane) in solar panels improves adhesion and provides protective qualities against environmental degradation.

    Rubber and Applications

    • Natural rubber includes substances derived from the sap of rubber trees and is used in diverse applications like tires and seals.
    • Uniwet 3048 serves as a wetting agent enhancing surface interaction in various formulations.

    Effects of Silicone Dosage

    • Higher silicone dosages in coatings can lead to improved hydrophobicity but may also cause issues such as sagging or reduced durability.
    • Polydimethylsiloxane may cure under heat; typical curing temperatures range from 100°C to 200°C.

    Advantages and Equivalents

    • Silicone emulsions offer advantages such as increased versatility and ease of application compared to traditional mold release agents.
    • GENIOSIL GF93 has an equivalent in the silane range that delivers comparable performance.

    Silane Dosage Effects

    • Excess silane dosage can negatively impact the adhesion and mechanical properties of coatings or sealants, possibly leading to brittleness or reduced effectiveness.

    Wetting vs. Dispersing

    • Wetting refers to the process of a liquid spreading on a solid surface, while dispersing involves the distribution of particles in a liquid medium.
    • Wetting agents function to reduce surface tension, facilitating the spread and adhesion of liquids on solid substrates.

    Application of WR1

    • WR1 is commonly used for its water-repellent properties in various coatings, enhancing durability and protecting substrates from moisture.

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