Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Shin-Etsu KBM-702 Chloropropylmethyldimethoxysilane

Shin-Etsu KBM-702 is a chloropropylmethyldimethoxysilane coupling agent from Shin-Etsu’s KBM series. It enhances adhesion between organic polymers and inorganic substrates like glass, metals, or fillers. Widely used in silicone rubber, sealants, and composite materials for improved mechanical strength and moisture resistance. Offers excellent hydrolytic stability and reactivity with both silanol and amine groups.
  • shin etsu kbm 702 chloropropylmethyldimethoxysilane_626c22c7
  • shin etsu kbm 702 chloropropylmethyldimethoxysilane_626c22c7

Features Of Shin-Etsu KBM-702 Chloropropylmethyldimethoxysilane

  1. Reactive bifunctional silane with both hydrolyzable methoxy groups and an electrophilic chloropropyl moiety for covalent bonding to organic polymers.

  2. Enables strong interfacial adhesion between inorganic fillers (e.g., silica, glass) and chlorinated or polar thermoplastics/elastomers.

  3. Improved hydrolytic stability compared to trialkoxysilanes due to the presence of only two methoxy groups and a sterically hindered methyl group.

  4. Facilitates efficient surface modification of minerals and pigments without requiring high-temperature curing.

  5. Compatible with common industrial processing methods including extrusion, injection molding, and solution-based coating.

Typical Applications Of Shin-Etsu KBM-702 Chloropropylmethyldimethoxysilane

  1. Adhesion promoter in chlorinated polyethylene (CPE) and chlorosulfonated polyethylene (CSPE) cable jacketing compounds.

  2. Surface treatment agent for silica-filled silicone rubber composites requiring enhanced tear strength and dielectric performance.

  3. Functional additive in flame-retardant PVC formulations containing alumina trihydrate (ATH) or magnesium hydroxide.

  4. Interfacial coupling agent for glass fiber-reinforced thermoplastic polyesters (e.g., PET, PBT) in automotive under-hood components.

  5. Modifier for pigment dispersions in solvent-borne industrial coatings targeting improved gloss retention and weather resistance.

Specifications Of Shin-Etsu KBM-702 Chloropropylmethyldimethoxysilane

Chemical TypeChloropropyl-functional dimethoxysilane
Product FormLiquid
AppearanceColorless to pale yellow clear liquid
Specific Gravity (25°C)1.06–1.08 g/cm³
Refractive Index (25°C)1.435–1.445
Boiling Point (760 mmHg)220–230°C (decomposes)
Flash Point (Tag Closed Cup)95–105°C
Storage Stability (unopened, 25°C)≥12 months


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