1975

Cyanoacrylate adhesives are widely used for gluing glass, steel, brass, aluminium rubber, "Textolite" (registered Trade Mark), PVC, and other materials, in the aerospace industry, the manufacture of precision instruments, radio-electronics, the manufacture of electronic and optical instrutnents such as photographic cameras and transistor radios, in other branches of technology, and as an adhesive in medicine for soft and osseous tissues.

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 is disclosed for initiating the polymerization of small amounts of relatively sensitive liquid monomer compositions, comprising esters of cyanoacrylic acid, by means of a polymerization catalyzing particle adapted to the added to the monomer composition and then separated from the same prior to the gelation of the monomer. The catalyzing particle may be in the form of a discrete particle such as beads, chips, or the like, or in the form of a rod sufficiently long so that the same can be used to simultaneously stir and activate the monomer.

Water-borne pollutants, particularly those of oelaginous nature, may be treated with monomers which polymerize in the presence of moisture, preferably, monomeric esters of 2-cyanoacrylic acid. Upon polymerization, significant portions of the pollutant are incorporated within a polymer matrix, thus reducing the danger to shore and marine ecology and aesthetics.

A heat-resistant composition including 85 to 1 mol% of N,N'-substituted bismaleimide and 15 to 99 mol% of alpha-cyanoacrylate. Diamines or silane coupling agents may be incorporated.