The present invention relates to a printing substance for coating glass surfaces by way of an ink jet printing method, the printing substance comprising A) at least one monomer having at least one C—C double bond; B) at least one cationically curable monomer comprising epoxy groups; C) at least one cationically curable monomer comprising oxetane groups; D) at least one adhesion agent. In addition, the present invention describes a method for producing the printing substance and the use thereof.

A composition set containing: a first liquid containing an oxidizing agent; and a second liquid containing a reducing agent, wherein at least one of the first liquid and the second liquid contains a compound represented by the following formula (1):

##STR00001##

wherein R.sup.11 and R.sup.12 each independently represent a hydrogen atom or a methyl group, and R.sup.13 represents a divalent group having a polyoxyalkylene chain, and wherein the polyoxyalkylene chain has 100 or more of oxyalkylene groups.

A composition set containing: a first liquid containing an oxidizing agent; and a second liquid containing a reducing agent, wherein at least one of the first liquid and the second liquid contains a compound represented by the following formula (1):

##STR00001##

wherein R.sup.11 and R.sup.12 each independently represent a hydrogen atom or a methyl group, and R.sup.13 represents a divalent group having a polyoxyalkylene chain, and wherein the polyoxyalkylene chain has 100 or more of oxyalkylene groups.

Provided are a cured product of a curable composition including a compound represented by General Formula (1), in which a birefringence Δn at a wavelength of 587 nm is 0.00≤Δn≤0.01; an optical member; a lens; a compound represented by General Formula (1); a curable resin composition containing the compound; a cured product; a diffractive optical element; and a multilayer diffractive optical element.

Pol.sup.1-Sp.sup.a-L.sup.1-Ar-L.sup.2-Sp.sup.b-Pol.sup.2  Genera Formula (1) Ar represents an aromatic ring group represented by a specific formula, L.sup.1 and L.sup.2 represent —O—, Sp.sup.a and Sp.sup.b represent a linking group having the shortest atom number of 11 or more and linking Pol and L, Pol.sup.1 and Pol.sup.2 represent a polymerizable group, and in Sp.sup.a and Sp.sup.b, a linking portion to L.sup.1 or L.sup.2 is —CH.sub.2— and a linking portion to Pol.sup.1 or Pol.sup.2 is a carbon atom.

Provided are a cured product of a curable composition including a compound represented by General Formula (1), in which a birefringence Δn at a wavelength of 587 nm is 0.00≤Δn≤0.01; an optical member; a lens; a compound represented by General Formula (1); a curable resin composition containing the compound; a cured product; a diffractive optical element; and a multilayer diffractive optical element.

Pol.sup.1-Sp.sup.a-L.sup.1-Ar-L.sup.2-Sp.sup.b-Pol.sup.2  Genera Formula (1) Ar represents an aromatic ring group represented by a specific formula, L.sup.1 and L.sup.2 represent —O—, Sp.sup.a and Sp.sup.b represent a linking group having the shortest atom number of 11 or more and linking Pol and L, Pol.sup.1 and Pol.sup.2 represent a polymerizable group, and in Sp.sup.a and Sp.sup.b, a linking portion to L.sup.1 or L.sup.2 is —CH.sub.2— and a linking portion to Pol.sup.1 or Pol.sup.2 is a carbon atom.

The present invention provides a precoating agent which is used in an image forming method using an active ray curable ink and which is applied to a surface of a recording medium before the active ray curable ink is applied, the precoating agent comprising a crystalline resin and an active ray polymerizable compound.

The present invention provides a precoating agent which is used in an image forming method using an active ray curable ink and which is applied to a surface of a recording medium before the active ray curable ink is applied, the precoating agent comprising a crystalline resin and an active ray polymerizable compound.

Fluorescent material composite particles include translucent inorganic particles having a volume average particle diameter in a range of 30 nm or more and 500 nm or less, fluorescent nanoparticles having an average particle diameter in a range of 5 nm or more and 25 nm or less, and a first resin. At least a part of each of the translucent inorganic particles are embedded in the first resin. The translucent inorganic particles are unevenly distributed to a surface of the fluorescent material composite particles. The fluorescent material composite particles have a volume average particle diameter in a range of 0.5 μm or more and 50 μm or less.

Fluorescent material composite particles include translucent inorganic particles having a volume average particle diameter in a range of 30 nm or more and 500 nm or less, fluorescent nanoparticles having an average particle diameter in a range of 5 nm or more and 25 nm or less, and a first resin. At least a part of each of the translucent inorganic particles are embedded in the first resin. The translucent inorganic particles are unevenly distributed to a surface of the fluorescent material composite particles. The fluorescent material composite particles have a volume average particle diameter in a range of 0.5 μm or more and 50 μm or less.

A fluoroacrylic compound of formula (1) which, when added to an actinic-ray-curable composition, can impart excellent liquid repellency, antifouling properties, and wear resistance.

Y—Rf.sup.1—Z.sup.1-Q.sup.1-[Z.sup.2—X].sub.a  (1)

[Rf.sup.1 is a divalent perfluoropolyether group. Z.sup.1 is a divalent hydrocarbon group optionally containing O, N, or Si. Q.sup.1 is an (a+1)-valent linking group including a+1 or more Si atoms. Z.sup.2 is a divalent alkylene ether group. X is H or a monovalent organic group having an (α-substituted) acryl group, and at least one of the X moieties is a monovalent organic group having an (α-substituted) acryl group. Symbol a is 1-10. Y is F or —Z.sup.1-Q.sup.1-[Z.sup.2—X].sub.a. All of the Z.sup.1 moiety and the a Z.sup.2 moieties within the [ ] have been bonded to the Si atoms contained in the Q.sup.1 and the molecule has no urethane bond therein.]