Here are key examples of silane coupling agents, categorized by their functional groups, along with their chemical structures, applications, and industrial relevance:

1. Methacrylate-Functional Silanes

Example:

γ-Methacryloxypropyltrimethoxysilane (γ-MPS)

Chemical Formula: CH₂=C(CH₃)COO(CH₂)₃Si(OCH₃)₃

CAS No.: 2530-85-0 

Applications:

Dental composites (bonds silica fillers to methacrylate resins like Bis-GMA).

UV-curable coatings and adhesives.

2. Amino-Functional Silanes

Example:

3-Aminopropyltriethoxysilane (APTES)

Chemical Formula: NH₂(CH₂)₃Si(OC₂H₅)₃

CAS No.: 919-30-2

Applications:

Epoxy composites (improves adhesion to glass fibers).

Surface modification of nanoparticles (e.g., SiO₂, TiO₂).

Biomedical devices (enhances cell adhesion).

3. Epoxy-Functional Silanes

Example:

γ-Glycidoxypropyltrimethoxysilane (γ-GPS, GPTMS)

Chemical Formula: CH₂OCHCH₂O(CH₂)₃Si(OCH₃)₃

CAS No.: 2530-83-8

Applications:

Glass fiber-reinforced plastics (bonding polyester resins to glass).

Protective coatings for metals.

4. Vinyl-Functional Silanes

Example:

Vinyltrimethoxysilane (VTMO)

Chemical Formula: CH₂=CHSi(OCH₃)₃

CAS No.: 2768-02-7 

Applications:

Crosslinking agent in polyethylene (PE) and ethylene-vinyl acetate (EVA).

Adhesion promoter in silicone rubbers.