A resin composition contains a maleimide compound (I) that is the product of a reaction between a diamine (a-1) derived from a dimer acid and maleic anhydride, and a reactive polycarboxylic acid resin (II) that is the product of a reaction between a reactive epoxycarboxylate resin, the reactive epoxycarboxylate resin being the product of a reaction between an epoxy resin (b-1) and a compound (b-2) having a polymerizable ethylenically unsaturated group and a carboxy group together in one molecule, and a polybasic acid anhydride (b-3).

A resin composition contains a maleimide compound (I) that is the product of a reaction between a diamine (a-1) derived from a dimer acid and maleic anhydride, and a reactive polycarboxylic acid resin (II) that is the product of a reaction between a reactive epoxycarboxylate resin, the reactive epoxycarboxylate resin being the product of a reaction between an epoxy resin (b-1) and a compound (b-2) having a polymerizable ethylenically unsaturated group and a carboxy group together in one molecule, and a polybasic acid anhydride (b-3).

The present invention is directed to an one-component (1K) composition comprising, based on the weight of the composition: from 40 to 98 wt. % of a) at least one epoxy resin; from 0.5 to 30 wt. % of b) at least one organoboron compound selected from tetrasubstituted borate salts of monovalent cations of tertiary amines; and, from 0.5 to 30 wt. % of c) at least one (meth)acrylamide monomer of Formula (VII):

##STR00001##

wherein: R.sup.a is H or Me; G is selected from —NH.sub.2, —NHR.sup.b and —N(R.sup.b)(R.sup.c); R.sup.b and R.sup.c are independently selected from C.sub.1-C.sub.18 alkyl, C.sub.1-C.sub.18 hydroxyalkyl, C.sub.1-C.sub.18 alkalkoxy, C.sub.6-C.sub.18 aryl and —(CH.sub.2).sub.n—N(R.sup.d)(R.sup.e); n is an integer of from 1 to 4; and, R.sup.d and R.sup.e are independently selected from H and C.sub.1-C.sub.6 alkyl.

The present invention is directed to an one-component (1K) composition comprising, based on the weight of the composition: from 40 to 98 wt. % of a) at least one epoxy resin; from 0.5 to 30 wt. % of b) at least one organoboron compound selected from tetrasubstituted borate salts of monovalent cations of tertiary amines; and, from 0.5 to 30 wt. % of c) at least one (meth)acrylamide monomer of Formula (VII):

##STR00001##

wherein: R.sup.a is H or Me; G is selected from —NH.sub.2, —NHR.sup.b and —N(R.sup.b)(R.sup.c); R.sup.b and R.sup.c are independently selected from C.sub.1-C.sub.18 alkyl, C.sub.1-C.sub.18 hydroxyalkyl, C.sub.1-C.sub.18 alkalkoxy, C.sub.6-C.sub.18 aryl and —(CH.sub.2).sub.n—N(R.sup.d)(R.sup.e); n is an integer of from 1 to 4; and, R.sup.d and R.sup.e are independently selected from H and C.sub.1-C.sub.6 alkyl.

A radiation-curable resin composition, suitable for use in 3D printing, and to the production method thereof, i.e. the method for producing three-dimensional objects using radiation by means of 3D printing of the laser, DLP or LCD type, with successive photopolymerisable layers. The radiation-curable resin composition comprises one or more epoxy-acrylic resins and polymethyl methacrylate, graphene, halloysite nanotubes and one or more photoinitiators.

A radiation-curable resin composition, suitable for use in 3D printing, and to the production method thereof, i.e. the method for producing three-dimensional objects using radiation by means of 3D printing of the laser, DLP or LCD type, with successive photopolymerisable layers. The radiation-curable resin composition comprises one or more epoxy-acrylic resins and polymethyl methacrylate, graphene, halloysite nanotubes and one or more photoinitiators.

A dark-colored system photopolymerization composition, comprising: 20-80 phr of photopolymerizable prepolymer, 5-60 phr of photopolymerizable monomer, 0.2-8 phr of photoinitiator, and 0.1-5 phr of melanin, 0.05-5 phr of upconversion materials. The composition can construct photopolymerization under near-infrared irradiation. The dark pigment can avoid the strong absorption of near-infrared light, and the upconversion material can absorb near-infrared light with good penetrating ability and emit ultraviolet or visible light to induce the decomposition of free radicals or ionic photoinitiators in the composition. Then produced active species realize the photopolymerization of dark-colored compositions. The invention increases the depth of photopolymerization of dark-colored compositions and improves the mechanical properties of the polymer, that will broaden application fields of photopolymerization materials.

A dark-colored system photopolymerization composition, comprising: 20-80 phr of photopolymerizable prepolymer, 5-60 phr of photopolymerizable monomer, 0.2-8 phr of photoinitiator, and 0.1-5 phr of melanin, 0.05-5 phr of upconversion materials. The composition can construct photopolymerization under near-infrared irradiation. The dark pigment can avoid the strong absorption of near-infrared light, and the upconversion material can absorb near-infrared light with good penetrating ability and emit ultraviolet or visible light to induce the decomposition of free radicals or ionic photoinitiators in the composition. Then produced active species realize the photopolymerization of dark-colored compositions. The invention increases the depth of photopolymerization of dark-colored compositions and improves the mechanical properties of the polymer, that will broaden application fields of photopolymerization materials.

The present disclosure provides to a novel flame retardant resin, wherein the resin is a reaction product of an epoxy material, a curing agent, and a partially esterified tannic acid of formula I,

##STR00001## wherein TA represents a tannic acid moiety, R.sup.1 represents an optionally substituted C.sub.1-C.sub.6 straight or branched alkyl, an optionally substituted C.sub.3-C.sub.6 cyclic ring, an optionally substituted phenyl group, or any combination thereof, and n is 2-10.

The present disclosure provides to a novel flame retardant resin, wherein the resin is a reaction product of an epoxy material, a curing agent, and a partially esterified tannic acid of formula I,

##STR00001## wherein TA represents a tannic acid moiety, R.sup.1 represents an optionally substituted C.sub.1-C.sub.6 straight or branched alkyl, an optionally substituted C.sub.3-C.sub.6 cyclic ring, an optionally substituted phenyl group, or any combination thereof, and n is 2-10.