Silane - Coupling & crosslinking agents - Mumbai

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Why silane?
●To improve the adhesion.
●Changes the resin property.
●Improves dispersion of the pigments 
●Improves the mechanical property of the coatings.

 

STRUCTURE OF SILANE

ORGANOFUNCTIONAL GROUP
●It can be vinyl,amino, methacryloxy, mercapto, others.
●Improves wettability.
●Reaction mechanism on organic materials.
●Improves compatibility.
●Forms chemical bond with resin.

HYDROLYZABLE GROUP:

●It can be methoxy, ethoxy, dialkoxy and trimethoxy groups.
●Provides adhesion.
●Controls reactivity by size( bigger reacts slowly smaller reacts quickly)

 

Basics of Silane Chemistry:

Silanes are very reactive to moisture.
> Low molecular weight oligomers still act as adhesion promoters.
> Higher polymers become insoluble.
> Amino silanes are basic, therefore hydrolysis is self-catalyzing (pH 9-10).
> Amino silanes can make stable water based emulsions.

   Hydrolysis slowest at pH ~7 Condensation slowest at pH ~4.5

 

Silane Grades:

  • Methyltrimethoxy silane
  • Vinyltrimethoxy silane
  • 3-Glycidoxypropyltrimethoxy silane
  • Aminoethylaminopropylmethyldimethoxysilane
  • Aminoethylaminopropyltrimethoxy silane
  • 3-Aminopropyltriethoxysilane 
  • 3Methaacryloxypropyltrimethoxy silane  and more grades as per customers requirement.

 

Applications:

  • Adhesives/sealants 
  • Coating/Ink
  • Rubber & elastomers
  • Plastic modification
  • Silicone systems 
  • Epoxy systems
  • Polyurethane systems 
  • Acrylic systems
  • Water based systems 

 

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Need Help ?
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  • info@plamerpolymers.com