The present invention provides a pressure-sensitive adhesive composition, including a copolymer obtained by polymerizing (A) at least one of unsaturated compounds represented by the following formula (1) and (B) at least one selected from the group consisting of: an unsaturated carboxylic acid; and an unsaturated carboxylic acid ester compound except for the component (A), a method of producing the pressure-sensitive adhesive composition, and a re-peelable sheet:

##STR00001##

wherein R.sup.1 represents a hydrocarbon group or acyl group having 8 to 36 carbon atoms, A.sup.1 and A.sup.2 each independently represent an alkylene group having 2 to 4 carbon atoms, L represents a group represented by the following general formula (2), “z” represents a number from 1 to 10, X represents a hydrogen atom or an ionic hydrophilic group, “m” represents a number from 0 to 100, and “n” represents a number from 0 to 100;

##STR00002##

wherein R.sup.2 and R.sup.3 each independently represent a hydrogen atom or a methyl group, “x” represents a number from 0 to 12, and “y” represents a number of 0 or 1.

The present invention provides a pressure-sensitive adhesive composition, including a copolymer obtained by polymerizing (A) at least one of unsaturated compounds represented by the following formula (1) and (B) at least one selected from the group consisting of: an unsaturated carboxylic acid; and an unsaturated carboxylic acid ester compound except for the component (A), a method of producing the pressure-sensitive adhesive composition, and a re-peelable sheet:

##STR00001##

wherein R.sup.1 represents a hydrocarbon group or acyl group having 8 to 36 carbon atoms, A.sup.1 and A.sup.2 each independently represent an alkylene group having 2 to 4 carbon atoms, L represents a group represented by the following general formula (2), “z” represents a number from 1 to 10, X represents a hydrogen atom or an ionic hydrophilic group, “m” represents a number from 0 to 100, and “n” represents a number from 0 to 100;

##STR00002##

wherein R.sup.2 and R.sup.3 each independently represent a hydrogen atom or a methyl group, “x” represents a number from 0 to 12, and “y” represents a number of 0 or 1.

A crosslinkable composition containing: a liquid monocyclic olefin ring-opened polymer (A) having a reactive group at a polymer chain end thereof and a weight-average molecular weight (Mw) of 1,000 to 50,000; and a crosslinkable compound (B) having, in the molecule, two or more functional groups reactive with the reactive group at the polymer chain end of the monocyclic olefin ring-opened polymer (A).

A crosslinkable composition containing: a liquid monocyclic olefin ring-opened polymer (A) having a reactive group at a polymer chain end thereof and a weight-average molecular weight (Mw) of 1,000 to 50,000; and a crosslinkable compound (B) having, in the molecule, two or more functional groups reactive with the reactive group at the polymer chain end of the monocyclic olefin ring-opened polymer (A).

A dual-cure method for forming a solid polymeric structure is provided. An end-capped, imide-terminated prepolymer is combined with at least one photopolymerisable olefinic monomer, at least one photoinitiator, and a diamine, to form a curable resin composition, which, in a first step, is irradiated under conditions effective to polymerize the at least one olefinic monomer, thus forming a scaffold composed of the prepolymer and the polyolefin with the diamine trapped therein. The irradiated composition is then thermally treated at a temperature effective to cause a transimidization reaction to occur between the prepolymer and the diamine, thereby releasing the end caps of the prepolymer and providing the solid polymeric structure. A curable resin composition comprising an end-capped, imide-terminated prepolymer, at least one photopolymerisable olefinic monomer, at least one photoinitiator, and a diamine, is also provided, as are related methods of use.

A dual-cure method for forming a solid polymeric structure is provided. An end-capped, imide-terminated prepolymer is combined with at least one photopolymerisable olefinic monomer, at least one photoinitiator, and a diamine, to form a curable resin composition, which, in a first step, is irradiated under conditions effective to polymerize the at least one olefinic monomer, thus forming a scaffold composed of the prepolymer and the polyolefin with the diamine trapped therein. The irradiated composition is then thermally treated at a temperature effective to cause a transimidization reaction to occur between the prepolymer and the diamine, thereby releasing the end caps of the prepolymer and providing the solid polymeric structure. A curable resin composition comprising an end-capped, imide-terminated prepolymer, at least one photopolymerisable olefinic monomer, at least one photoinitiator, and a diamine, is also provided, as are related methods of use.

The pressure-sensitive adhesive tape of the present invention is a pressure-sensitive adhesive tape comprising a pressure-sensitive adhesive layer comprising a photo-cured acrylic resin, a metal having a lower potential than that of iron, and an electroconductive material, wherein the pressure-sensitive adhesive layer has a total light transmittance X, per micrometer of the thickness, of 99.85% or less, and the pressure-sensitive adhesive layer has a total light transmittance Y of 6% or more. The present invention can provide a pressure-sensitive adhesive tape having a great adhesive force on both the front side and the back side and having good sacrificial corrosion resistance.

The pressure-sensitive adhesive tape of the present invention is a pressure-sensitive adhesive tape comprising a pressure-sensitive adhesive layer comprising a photo-cured acrylic resin, a metal having a lower potential than that of iron, and an electroconductive material, wherein the pressure-sensitive adhesive layer has a total light transmittance X, per micrometer of the thickness, of 99.85% or less, and the pressure-sensitive adhesive layer has a total light transmittance Y of 6% or more. The present invention can provide a pressure-sensitive adhesive tape having a great adhesive force on both the front side and the back side and having good sacrificial corrosion resistance.

A curable composition includes a polymer having a terminal unit. The curable composition also includes a monomer polymerizable with the terminal unit of the polymer. The curable composition additionally includes an inorganic particle capable of absorbing moisture.

A curable composition includes a polymer having a terminal unit. The curable composition also includes a monomer polymerizable with the terminal unit of the polymer. The curable composition additionally includes an inorganic particle capable of absorbing moisture.