There are provided a composition for sealing a coated electric wire, containing a 2-cyanoacrylate compound, which gives a cured product not only excellent in heat resistance, moisture heat resistance, and thermal shock resistance but also excellent in flex resistance, wherein the 2-cyanoacrylate compound contains more than 50 mass % to not more than 99 mass % of a 2-cyanoacrylate having an ether bond in an ester residue, and not less than 1 mass % to less than 50 mass % of at least one alkyl 2-cyanoacrylate selected from a group consisting of isopropyl cyanoacrylate and n-butyl cyanoacrylate, relative to 100 mass % of the total of the 2-cyanoacrylate compound; and further a coated electric wire covered by the composition.

An active energy ray-curable composition is disclosed including: an anionically polymerizable compound represented by (1): ##STR00001##
wherein EWG represents an electron-withdrawing group, X represents a single bond or an oxygen atom (—O—), R represents an n-valent organic group, and n represents an integer of 1 to 6; when n is an integer of 2 to 6, the respective EWG and the respective X may be the same or different; and when n is 1, EWG and R may be bonded; and a compound (photobase generator) represented by (2): ##STR00002##
wherein ring A represents an aromatic ring that may be substituted or a heteroaromatic ring that may be substituted; R.sup.1 and R.sup.2 are the same or different and each represents a hydrogen atom or an alkyl group; R.sup.1 and R.sup.2 may be bonded to each other to form a ring together with an adjacent nitrogen atom; and the ring may be substituted.

An active energy ray-curable composition is disclosed including: an anionically polymerizable compound represented by (1): ##STR00001##
wherein EWG represents an electron-withdrawing group, X represents a single bond or an oxygen atom (—O—), R represents an n-valent organic group, and n represents an integer of 1 to 6; when n is an integer of 2 to 6, the respective EWG and the respective X may be the same or different; and when n is 1, EWG and R may be bonded; and a compound (photobase generator) represented by (2): ##STR00002##
wherein ring A represents an aromatic ring that may be substituted or a heteroaromatic ring that may be substituted; R.sup.1 and R.sup.2 are the same or different and each represents a hydrogen atom or an alkyl group; R.sup.1 and R.sup.2 may be bonded to each other to form a ring together with an adjacent nitrogen atom; and the ring may be substituted.

A trocar assembly includes a housing, an elongated cannula extending from the housing to an insertion tip, and skirt. The skirt has a leading end portion and a trailing end portion. The leading end portion is secured to the insertion tip. The skirt has an outer surface supporting an antimicrobial material and an inner surface supporting a medical adhesive material.

The present invention provides a cyanoacrylate adhesive composition comprising: (A) a cyanoacrylate component, and (B) a β,β-diaryl-α-cyanoacrylate-based light stabilizer; cured product of the composition according to the present invention, and a method of bonding together two substrates using the cyanoacrylate adhesive composition according to the present invention.

A composition for sealing coated electric wire includes a 2-cyanoacrylate compound containing an alkyl-2-cyanoacrylate having an alkyl group with ≥ 2 carbon atoms, and a 2-cyanoacrylate having an ether bond in an ester residue (≥ 10 mass% relative to 100 mass% of the total of the 2-cyanoacrylate compound),and a thickener, and exhibiting a suction length of 7-42 mm when a tip of a capillary tube (120 mm length and an inner diameter of 1.05 mm) is immersed in a bath solution of 30 mm in depth of the composition for 2 seconds and pulled up, and then the capillary tube is left to stand for 24 hours wherein the capillary tube is placed so that a longitudinal direction of the capillary tube is horizontal with respect to a gravity direction. A sealed coated electric wire is provided. Excellent heat resistance, moisture heat resistance, and thermal shock resistance exhibited upon curing.

Cyanoacrylic adhesive compositions of the type comprising at least one cyanoacrylic acid ester or one malonic acid ester having an allyl, acrylic or methacrylic group, wherein there is also present at least one radical initiator of the polymerization reaction of the allyl, acrylic or methacrylic ester of cyanoacrylic acid or malonic acid and at least one radical inhibitor of said polymerization reaction. In comparison with known cyanoacrylic adhesive compositions, those according to the invention offer the advantage of maintaining their bonding capability even at high temperatures, in particular up to 150° C.

Cyanoacrylic adhesive compositions of the type comprising at least one cyanoacrylic acid ester or one malonic acid ester having an allyl, acrylic or methacrylic group, wherein there is also present at least one radical initiator of the polymerization reaction of the allyl, acrylic or methacrylic ester of cyanoacrylic acid or malonic acid and at least one radical inhibitor of said polymerization reaction. In comparison with known cyanoacrylic adhesive compositions, those according to the invention offer the advantage of maintaining their bonding capability even at high temperatures, in particular up to 150° C.

The subject invention pertains to a method of forming an adhesive material by a branching polymerization free of restrictive or harsh reaction conditions. A readily polymerizable composition includes a component comprises a chain-transfer functionality that can induce the formation of branches upon polymerization of the composition. The method enables in-situ polymerization and surface-initiated polymerization useful for rapid adhesive material formation on surfaces such as biological tissue.

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.