Okura Kogyo Kabushiki Kaisha

Hisakazu Mori

Hideaki Matsuda

Takanori Okamoto

There is provided an anaerobic curing adhesives showing a quick curing property for not only active metals such as iron series metals etc., but also plated metals, comprising 100 parts by weight of anaerobically polymerizable monomers containing at least 10% by weight of a hydrophilic anaerobically polymerizable monomer capable of dissolving more than 0.5% by weight of water and following components (all parts are by weight) (a) to (d)

Anaerobic curing adhesive compositions

By adding 0.001 to 0.1% by weight of a polyphosphoric acid to a one-part type anaerobic adhesive obtained by adding an organic peroxide, a hardening accelerator to an ordinary anaerobically polymerizable monomer, the adhesive property such as breakaway-torque on adhering screw portions, impact and shearing strength on adhering flat parts of metals and the preservative stability are greatly improved.

Anaerobic adhesives having excellent adhesive property and preservative

There is provided a one-part structural adhesive composition having satisfactory adhesive to plane surfaces and oily surface-adhesion properties. The adhesive composition comprises substantial amounts of a hydroxyl-containing polymerizable methacrylate represented by a certain general formula and a polymerizable methacrylate having 2 or more methacrylic groups as well as small amounts of a polymerizable organic phosphate represented by a certain general formula, tetrahydroquinoline salt of o-benzoic sulfimide, an organic hydroperoxide and water; the amounts of the above-mentioned components in the composition being within defined ranges.

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Kagawa, Japan

Hisakazu Mori