Some of α-cyanoacrylate adhesive does not achieve practical bond (adhesion) strength and any objective materils do not have adhesion with the same. The inventor provides a primer which is not harmful against human body and shows when applied sufficient adhesion strength even on those materials hard to have adhesion. A primer for cyanoacrylate adhesive characterized by comprising as an effective content amphoteric compounds containing in molecules the following substances a and b: a: carboxyl group or sulfonic acid group, and b: amines.
There is provided a cyanoacrylate composition comprising: a cyanoacrylate; and a 2-substituted benzothiazole or a derivative thereof wherein the 2-substituent is an alkyl, an alkene, an alkylbenzyl, an alkylamino, an alkoxy, an alkylhydroxy, an ether, a sulfenamide, a thioalkyl or a thioalkoxy group, with the proviso that an amide portion of the sulfenamide does not have a tert butylamino or a morpholine group.
A composition comprising a polymerizable adhesive monomer is applied over a biologically active initiator or accelerator for polymerization of the monomer. The biologically active initiator or accelerator is a medicament that provides a desired medical or therapeutic activity as well as enhancing polymerization of the adhesive.
This invention concerns polymerization accelerators or surface activators for increasing the rate of cure of cyanoacrylate adhesive compositions. The active ingredients of the activators are organic compounds containing a N-C=S or a N=C-S group.
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.
An adhesive composition comprising an adhesive base and accelerator portion, the adhesive base comprising (a) a polymerizable monomer selected from the group consisting of unsubstituted alpha-cyanoacrylates and substituted alpha-cyanoacrylates; and (b) an effective amount of stabilizer; and the accelerator portion comprising a weakly acidic or weakly basic ionic accelerator compound comprising a cation M and an anion A, the pKa relating to cation M in the equilibrium defined by M(H2O) + = MOH + H+ being at least about 10, the pKa relating to anion A in the equilibrium defined by HA= A- + H+
A cyanoacrylate composition suitable as cyanoacrylate adhesives for bonding porous materials, shaping material and fingerprint detectors comprises a 2-cyanoacrylate as a main component and at least one of crown ethers, polyalkylene oxides and derivatives of the polyalkylene oxides as a curing accelerator and at least one of hydrophobic silicas
Alpha-cyanoacrylate adhesives of fluorescent color having incorporated therein at least one member selected from C.I. Solvent Green 5; C.I. Acid Red 50 and C.I. Acid Red 52.
A cyanoacrylate-based adhesive composition is disclosed. The cyanoacrylate-based adhesive composition includes a cyanoacrylate monomer, and a bleachable dye including a Michler's hydrol cation or derivatized Michler's hydrol cation, paired with a non-nucleophilic anion that provides a stable color to the cyanoacrylate-based adhesive.
The advent of instant adhesive dates back to 1949, when Goodrich Co. of the US discovered alpha-cyanoacrylate synthesis method. Since 1959, when the world’s first instant adhesive “Eastman 910” appeared in the market, practical applications are going on around the world and improvements on cyanoacrylate adhesive are under way night and day seeking for higher functionality. Instant adhesive means an adhesive which can stick adherends in seconds, as understood by the name.
