Patent

Pastes of alpha-cyanoacrylate acid esters and insoluble fillers can be applied to surfaces submerged in water for securing thereto, in situ, a wide variety of metallic and non-metallic substances.

A method for adhesively joining two members includes the steps of mixing non-compressible beads with an adhesive, applying the resulting mixture to one of the members and hemming one member over the other in overlapping relationship. Apparatus for performing this method includes a container for containing a mixture of an adhesive and a plurality of non-compressible beads, an applicator for applying the mixture to one of the members, and hemming means for hemming one member over the other in overlapping relationship.

A curable composition, in which powder of an organic or inorganic compound is added to and dispersed in a 2-cyanoacrylate and an acidic substance and a basic substance are contained as the stabilizer. In the curable composition of the invention, powder of organic or inorganic compound can be stably dispersed into the composition by the combined use of the acidic substance and the basic substance, thereby providing desired properties with ease while giving excellent storage stability and maintaing the instantaneous curing property of the composition.

The present invention relates to a polymerizable adhesive composition which comprises, at least as one constituent, a cyanacrylate component and which requires a comparitively short time for curing when used on surfaces. The present invention therefore also includes a method for the production of the cyanacrylate component described above, and the cyanacrylate component as such.

An adhesive composition comprising an .alpha.-cyanoacrylate and about 0.0001% by weight to about 20% by weight, based on the weight of the adhesive composition, of at least one compound selected from the group consisting of (1) polyehtylene glycols having a degree of polymerization of at least 3, and (2) non-ionic surface active agents having a poly(ehtyleneoxy) moiety therein with the poly(ehtyleneoxy) moiety having a degree of polymerization of at least 3.

A cyanoacrylate adhesive composition, which contains esters in which an alcohol residue thereof includes a dipentaerythritol residue and an acid residue thereof is an acrylic or methacrylic acid residue, and which composition is improved in adhesion performance under high temperature and humid conditions, namely moisture and thermal resistance.

A non-environmentally hazardous, non-volatile adhesive promoter composition useful in promoting the cure and/or enhancing adhesion of adhesives and for use in combination with adhesive bond polymerization. The promoter composition is a combination of a fluid carrier that remains substantially present during the curing of an adhesive composition and an active component capable of promoting the cure and/or enhancing adhesion of the adhesive and being miscible in the fluid carrier.

An adhesive composition includes one or more polymerizable cyanoacrylate monomers, a polymerization initiator and a polymerization accelerator for the one or more polymerizable cyanoacrylate monomers.

A composition comprising at least one carrier solvent, at least one primer component and at least one gelling or solidifying agent is provided. The composition according to the invention may he provided in the form of a soft solid, for example, in the form of a stick. A two-part adhesive system is also provided, comprising at least one anaerobic product and a composition comprising at least one carrier solvent, at least one primer component where the primer component is a cure promoting agent and at least one gelling or solidifying agent.

An activator composition for accelerating hardening and achieving cure-through-volume of cyanoacrylate adhesives) comprising; (a) one or more compounds selected from the group consisting of :(i) pyrazine; or a pyrazine derivative; said pyrazine derivative being pyrazine substituted with at least one electron-releasing group; (ii) pyridine N oxides substituted with at least one electron-releasing group; or (iii) 2,6 pyridines being pyridines substituted in the 2- and 6-positions by substituents, at least one of the substituents being electron-releasing provided that both substituents are not