Nitto Boseki Co., Ltd.

Chisso Corporation

Yoshiharu Suzuki

Hideharu Waketa

Kenichi Watanabe

Toshiya Sawai

Masuhito Ohgushi

Motoharu Murakoshi

Hideaki Kakiuchi

Silane coupling agents and a method of preparing the coupling agents are provided in which a silane coupling agent is prepared by reacting 2.3 to 4.0 mols of a haloalkylalkoxysilane with 1 mol of a diamine having N atoms to which 4 active hydrogen atoms are bound, by reacting 1.3 to 3.0 mols of a haloalkylalkoxysilane with 1 mol of a diamine having N atoms to which 3 active hydrogen atoms are bound and to which one alkylsilyl group is bound, or by reacting 0.3 to 2.0 mols of a haloalkylalkoxysilane with 1 mol of a diamine having N atoms to which 2 active hydrogen atoms are bound and to which 2 alkylsilyl groups are bound. In addition, a silane coupling agent may be prepared by reacting the diamine with a haloalkylalkoxysilane and a halomethylstyrene.

Silane coupling agent and glass fiber product for laminates

A glass fiber product for laminates is provided having excellent epoxy resin impregnation properties and solvent resistance, high soldering heat resistance, good heat shock resistance and low water adsorption properties, and to a silane coupling agent for providing such a glass fiber product. The silane coupling agent is prepared by reacting 2.3 to 4.0 mols of a haloalkylalkoxysilane with 1 mol of a diamine having N atoms to which 4 active hydrogen atoms are bound, a silane coupling agent prepared by reacting 1.3 to 3.0 mols of a haloalkylalkoxysilane with 1 mol of a diamine having N atoms to which 3 active hydrogen atoms are bound and to which one alkylsilyl group is bound, or a silane coupling agent prepared by reacting 0.3 to 2.0 mols of a haloalkylalkoxysilane with 1 mol of a diamine having N atoms to which 2 active hydrogen atoms are bound and to which 2 alkylsilyl groups are bound. A silane coupling agent prepared by reacting the diamine with a haloalkylalkoxysilane and a halomethylstyrene is also provided as is a glass fiber product for laminates treated with the above-mentioned silane coupling agent.

Disclosed is a method for rapid and accurate qualitative and quantitative analysis of finishing agent applied onto the surface of a glass fiber substrate. This method comprises placing a glass fiber substrate to be tested in a Fourier transform infrared spectrophotometer equipped with a diffuse reflectance measuring device, irradiating said glass fiber substrate with infrared ray and carrying out qualitative analysis of finishing agent on the surface of the glass fiber substrate from wave number of infrared absorption peak produced at the irradiation and quantitative analysis of the finishing agent from intensity of the infrared absorption peak.

Growing community of inventors

Fukushima, Japan

Yoshiharu Suzuki