A composition comprises a cyanoacrylate polymer and a protected amine. A method comprises: providing a shaped model comprising a cyanoacrylate polymer; preparing an investment having a cavity that corresponds to the shaped model; and heating the shaped model to sufficient temperature that the cyanoacrylate polymer depolymerizes and volatilizes. A hardenable material may be cast in the investment to provide a replica of the shaped model. A curable composition comprises: a cyanoacrylate monomer; a free-radical photoinitiator; and a protected amine, wherein the curable composition is free of compounds that initiate anionic polymerization of the cyanoacrylate monomer at ambient temperature. A method of curing the curable composition is also disclosed.

The invention relates to a poly[α-cyanoacrylate] hydrolyzate, a preparation method and an application thereof, belonging to the field of pharmaceutical and chemical industry. A main technical solution is as follows: provided is a poly[α-cyanoacrylate] hydrolyzate having a chemical formula: CH.sub.2—CRCOOH.sub.n, wherein R=—CN or —COOH. Poly[2-cyanoacrylic acid] provided by the present invention is dispersed in water to prepare the negatively charged microsphere, that is, to obtain the new blank embolic microsphere, the particle size of the microsphere can be adjusted in a micron-scale range, and the microsphere have a deformation function to pass through a vascular with a specific shape, which can tightly embolize the vascular to avoid ectopic embolism caused by falling off; poly[2-carboxyacrylic acid] can be used for preparing a new nano-drug carrier, improving the curative effect of the carried drug on diseased tissues and reduce the toxic and side effects of the carried drug on normal tissues.

The invention relates to a poly[α-cyanoacrylate] hydrolyzate, a preparation method and an application thereof, belonging to the field of pharmaceutical and chemical industry. A main technical solution is as follows: provided is a poly[α-cyanoacrylate] hydrolyzate having a chemical formula: CH.sub.2—CRCOOH.sub.n, wherein R=—CN or —COOH. Poly[2-cyanoacrylic acid] provided by the present invention is dispersed in water to prepare the negatively charged microsphere, that is, to obtain the new blank embolic microsphere, the particle size of the microsphere can be adjusted in a micron-scale range, and the microsphere have a deformation function to pass through a vascular with a specific shape, which can tightly embolize the vascular to avoid ectopic embolism caused by falling off; poly[2-carboxyacrylic acid] can be used for preparing a new nano-drug carrier, improving the curative effect of the carried drug on diseased tissues and reduce the toxic and side effects of the carried drug on normal tissues.

Process for producing powdered polycyanoacrylate polymer by charging a reaction vessel with an aqueous mist, dripping a 2-cyanoacrylate into the reaction vessel, allowing the resulting reaction mass (polycyanoacrylate polymer) to cool, removing the polycyanoacrylate polymer from the reaction vessel, drying it, and pulverizing the dry solid into a powder. Powdered polycyanoacrylate polymer having a particle diameter in the range of from 1 to 200 microns. The particle size and shape herein contribute to uniform distribution of fumes during fingerprint capture. A high level of accuracy in fingerprint detection is provided among three distinct levels which include: (a) first level detection from ridge flow patterns such as whorl or loop; (b) second level detection from ridge flow singularities such as ridge endings and bifurcations; (c) and third level detection from pore configuration.

Process for producing powdered polycyanoacrylate polymer by charging a reaction vessel with an aqueous mist, dripping a 2-cyanoacrylate into the reaction vessel, allowing the resulting reaction mass (polycyanoacrylate polymer) to cool, removing the polycyanoacrylate polymer from the reaction vessel, drying it, and pulverizing the dry solid into a powder. Powdered polycyanoacrylate polymer having a particle diameter in the range of from 1 to 200 microns. The particle size and shape herein contribute to uniform distribution of fumes during fingerprint capture. A high level of accuracy in fingerprint detection is provided among three distinct levels which include: (a) first level detection from ridge flow patterns such as whorl or loop; (b) second level detection from ridge flow singularities such as ridge endings and bifurcations; (c) and third level detection from pore configuration.

The present invention relates to a photocurable composition which includes a cyanoacrylate component, a metallocene component, a photoinitiator and a plasticizer component, reaction products of which show among other things improved flexibility in terms of elongation at break.

The present invention relates to a photocurable composition which includes a cyanoacrylate component, a metallocene component, a photoinitiator and a plasticizer component, reaction products of which show among other things improved flexibility in terms of elongation at break.

Two-part cyanoacrylate/cationically curable adhesive systems, are provided.

The present invention is directed to a method for fabricating a three-dimensional object and to a three-dimensional object fabricated in a method according to the present invention.

Composite materials are formed by photo curing compositions containing one or more cyanoacrylates, substantial amounts of one or more fillers (in particular, opaque and/or fibrous fillers such as carbon fibers) as well as particular photoinitiator systems. The photoinitiator system may comprise, for example, a metallocene compound such as a ferrocene in combination with an acylgermane or other photocleavable compound which generates an acyl radical when exposed to light. Complete, deep curing of such compositions to provide composite materials having improved mechanical properties can be achieved, even though the light used to initiate curing may not be capable of penetrating the entire thickness of the composition due to the presence of the filler.