Silane Coupling Agent PC2300: gamma-Mercaptopropyltrimethoxysilane

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SiSiB^® PC2300

gamma-Mercaptopropyltrimethoxysilane
Synonym: 3-Trimethoxysilypropylmercaptan

Chemical Structure

Introduction

PC2300 is a mercapto-functional silane that finds use as a coupling agent in polysulfide and polyurethane caulks and sealants. It is especially useful in sulfur-cured and metal oxide-cured elastomers. Chemically bonding reinforcing minerals like silica, clay, mica and talc to the polymer matrix, properties including modulus, tensile and tear strength, heat buildup, abrasion resistance, resilience, compression set and cure time are improved in mineral-filled elastomers. It can be used as a pretreatment on minerals or added at the time of compounding. Being a rather efficient and fast sulfur containing silane, typically lower silane loading levels are used.

Typical Physical Properties

Chemical Name	gamma-mercaptopropyltrimethoxysilane
CAS No.	4420-74-0
EINECS No.	224-588-5
Formula	C₆H₁₆O₃Si
Molecular Weight	196.4

Color and Appearance	Water white to light straw liquid transparent liquid
Viscosity 25°C	1.5 cSt
Boiling Point	212°C [760mmHg]
Flash Point	88°C
Density 25/25°C	1.057
Refractive Index	1.440 [25°C]
Min. Purity	95.0%

Features and Benefits

Improves the adhesion of polysulfide and polyurethane sealants to glass and metal surfaces.
Improves low-rolling resistance in silica-reinforced tire tread compounds.
Enhances properties in mineral-reinforced articles such as shoe soles, rubber goods.

Reactivity
Materials to be avoided:
Water/moisture, Acids, Oxidizing agents
Dangerous reactions
Contact with water releases flammable gases
Reacts with acids forming hydrogen sulfide

Suitable for use in polymer system such as

Butyl	Epoxy	Neoprene
Nitrile	Phenolic	Polysulfide
Polyurethane	Styreue Butadiene

Storage stability

PC2300 has a shelf life of at least 12 month, if stored dry and in the tightly closed original containers at 25°C.

Handling
Do not store together with acids.
Store away from water/moisture.
Store away from oxidizing agents


Sales Centre	MATERIAL SAFETY DATA SHEET

Silane Coupling Agent	Silane Crosslinking Agent	Silane Blocking Agent
Silicone Fluids	Silicone Rubber	Silicone Resins

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