One-component, moisture-curable polyurethane adhesives exhibit excellent handling strength before being fully cured, and excellent creep properties after curing. The adhesives include an isocyanate-terminated prepolymer made from polyols that include a crystalline polyester and hydroquinone bis (2-hydroxyethyl) ether, and a polyoxazolidine compound.

One-component, moisture-curable polyurethane adhesives exhibit excellent handling strength before being fully cured, and excellent creep properties after curing. The adhesives include an isocyanate-terminated prepolymer made from polyols that include a crystalline polyester and hydroquinone bis (2-hydroxyethyl) ether, and a polyoxazolidine compound.

A polymerizable composition for an optical material of the present invention includes (A) a compound of which pKa value is 1 to 9, (B) a di- or higher functional iso(thio)cyanate compound, and (C) a di- or higher functional active hydrogen compound.

A resin composition preparation apparatus and a polyurea resin are provided. A resin introduction unit is configured to inject a composition solution and air mixed in the composition solution. An air bubble generator is connected to the resin introduction unit. An air bubble separation tank is connected to the air bubble generator. The air bubble generator comprises: an inlet through which the composition solution and the air are introduced from the resin introduction unit; an outlet through which the resin composition is discharged to the air bubble separation tank; and an internal flow channel connecting the inlet and the outlet so as to pass therethrough. The internal flow channel comprises a groove portion configured to form the air bubbles having a smaller particle size than that of the air.

A novel primer composition contains aldimine and/or epoxy resins, a process of making such primer to be used in glass bonding adhesive kit.

Provided is a compound having higher fluorescence quantum yield and higher optical stability than a conventional FLAP and a polymer compound containing the compound.

##STR00001## A: seven or eight-membered ring structure, Y.sup.1,Y.sup.2,Y.sup.3: halogen atom or the like, a1: number of Y.sup.1, a2: number of Y.sup.2, B: number of Y.sup.3, 0m and n3: when 1m3, Y.sup.1 may be substituted with a structure portion defined by m, when 1n3, Y.sup.2 may be substituted with a structure portion defined by n, and B.sup.1, B.sup.2: Formulas (2-1) to (2-3).

##STR00002## C.sup.1, C.sup.2, C.sup.3: structure containing a cyclic hydrocarbon compound, D.sup.1, D.sup.2, D.sup.3: substructure that inhibits aggregation, E.sup.1, E.sup.2, E.sup.3: polymerizable substructure, Z.sup.1: hydrogen atom or the like, c: number of substituent groups Z.sup.1, Z.sup.2, Z.sup.3: hydrogen atom or the like, and may form a ring with C.sup.2.

A resin composition preparation apparatus and a polyurea resin are provided. A resin introduction unit is configured to inject a composition solution and air mixed in the composition solution. An air bubble generator is connected to the resin introduction unit. An air bubble separation tank is connected to the air bubble generator. The air bubble generator comprises: an inlet through which the composition solution and the air are introduced from the resin introduction unit; an outlet through which the resin composition is discharged to the air bubble separation tank; and an internal flow channel connecting the inlet and the outlet so as to pass therethrough. The internal flow channel comprises a groove portion configured to form the air bubbles having a smaller particle size than that of the air.

A process for producing a photochromic cured body by curing a photochromic composition comprising (A) a polyiso(thio)cyanate compound having at least two isocyanate groups and/or isothiocyanate groups in one molecule, a poly(thi)ol compound having at least two hydroxyl groups and/or thiol groups in one molecule, (C) a mono(thi)ol compound having one hydroxy group or thiol group in one molecule, and a photochromic compound.

A novel primer composition contains aldimine and/or epoxy resins, a process of making such primer to be used in glass bonding adhesive kit.

The present invention provides a composition comprising a polyuretdione resin; and a blocked amine; and optionally, an additive package (e.g. flow control, wetting agent) and a solvent. The present invention further provides a method of forming a biuret comprising the steps of: unblocking a blocked amine in the presence of moisture; and crosslinking the unblocked amine with a polyuretdione resin. The compositions of the present invention are particularly applicable in or as coatings, adhesives, castings, composites, and sealants with good performance and extended pot-life.