Description

XIAMETER OFS-6076 Silane is an ambifunctional compound containing chloroalkyl functionality and three hydrolyzable alkoxysilyl groups. Possessing both organic and inorganic reactivity, the product has a dual nature and can react with organic polymers and also with glass, metal and other inorganic materials. As a coupling agent, it can be used either as an additive to the polymer or as a pretreatment on inorganic surfaces. Many chemical reactions are possible, providing significant improvements in polymer/filler or polymer/substrate interaction. Chemically, XIAMETER OFS6076 Silane has the formula Cl(CH2)3Si(OCH3)3.

Features

• Versatile chloroalkyl functionality

• Three hydrolyzable alkoxysilyl groups

Benefits

• Good wet-out

• Improved adhesion

• Increased dry and wet flexural strength

Composition

• 3-chloropropyltrimethoxysilane supplied as liquid

Application

XIAMETER OFS-6076 Silane is used as a coupling agent. Several articles document its use in improving the adhesion of glass fibers to organic polymers and resins.1, 2, 3 A 3-chloroalkyl-functional silane has been used as an additive in a urethane adhesive formulation.4 Its addition to the isocyanate prepolymer caused no adverse effect in the prepolymer viscosity. High peel strengths were observed for silane-modified urethane-to aluminum panels, and this adhesion was maintained even after prolonged exposure of the test specimen to elevated temperature and humidity. The 3-chloropropyltrimethoxysilane is also a good coupling agent for epoxy resins to glass in laminates.2 The resin had good wet-out on the treated glass fabric. More important, both flexural strength as well as wet and dry tensile strength were significantly improved over that seen with epoxy- and amine- functional silanes in these evaluations.

XIAMETER OFS-6076 Silane is also an effective coupling agent for treating glass fabric used in polystyrene laminates.3, 5 The flexural strength of test laminates was unchanged after two hours in boiling water, and the compressive strength improved slightly over that found under dry conditions. The wettability and structure of a film of 3-chloropropyltrimethoxysilane deposited on glass, steel and aluminum were also studied.6 Measurements indicated that such a film provides a very high critical surface tension compared with other silanes and is similar to polyvinyl chloride in surface polarity.