A resin composition and a filter element are provided. The resin composition includes a black coloring agent (A), an ethylenically-unsaturated monomer (B), a solvent (C), a resin (D), and a photoinitiator (E). The black coloring agent (A) includes a titanium black (A-1) and a carbon black (A-2). Based on a total usage amount of 100 parts by weight of the titanium black (A-1) and the carbon black (A-2), a usage amount of the titanium black (A-1) is 50 parts by weight to 75 parts by weight.

A resin composition and a filter element are provided. The resin composition includes a black coloring agent (A), an ethylenically-unsaturated monomer (B), a solvent (C), a resin (D), and a photoinitiator (E). The black coloring agent (A) includes a titanium black (A-1) and a carbon black (A-2). Based on a total usage amount of 100 parts by weight of the titanium black (A-1) and the carbon black (A-2), a usage amount of the titanium black (A-1) is 50 parts by weight to 75 parts by weight.

A resin composition and a filter element are provided. The resin composition includes a black coloring agent (A), an ethylenically-unsaturated monomer (B), a solvent (C), a resin (D), and a photoinitiator (E). The black coloring agent (A) includes a titanium black (A-1) and a carbon black (A-2). Based on a total usage amount of 100 parts by weight of the titanium black (A-1) and the carbon black (A-2), a usage amount of the titanium black (A-1) is 50 parts by weight to 75 parts by weight.

A reversible crosslinking reactant composition is provided. The composition includes at least one furan-group-containing oligomer having a structure represented by Formula (I) and a bismaleimide compound having a structure represented by

##STR00001##

Formula (II), wherein the equivalent ratio of the furan group of the furan-group-containing oligomer having a structure represented by Formula (I) to the maleimide group of the bismaleimide compound having a structure represented by Formula (II) is from 0.5:1 to 1:0.5.

A reversible crosslinking reactant composition is provided. The composition includes at least one furan-group-containing oligomer having a structure represented by Formula (I) and a bismaleimide compound having a structure represented by

##STR00001##

Formula (II), wherein the equivalent ratio of the furan group of the furan-group-containing oligomer having a structure represented by Formula (I) to the maleimide group of the bismaleimide compound having a structure represented by Formula (II) is from 0.5:1 to 1:0.5.

The invention provides a furan-modified compound or oligomer. The compound has a structure represented by Formula I:

##STR00001##

When formula I represents a compound, x is an integer of 15; A including a group formed of ketone, amido, imide, imido, phenyl ether or enol ether group; G is a direct bond, O, N, ArNH(CH.sub.2).sub.b, ArO(CH.sub.2).sub.b, ArO(CH.sub.2).sub.aNH(CH.sub.2).sub.b, (CH.sub.2).sub.aNH(CH.sub.2).sub.b, (CH.sub.2).sub.aO(CH.sub.2).sub.b or (CH.sub.2).sub.aCH(OH)(CH.sub.2).sub.bNH; Ar is substituted or unsubstituted arylene group; a is an integer of 1 to 5; and b is an integer of 0 to 5.

A resin composition and a filter element are provided. The resin composition includes a black coloring agent (A), an ethylenically-unsaturated monomer (B), a solvent (C), a resin (D), and a photoinitiator (E). The black coloring agent (A) includes a titanium black (A-1) and a carbon black (A-2). Based on a total usage amount of 100 parts by weight of the titanium black (A-1) and the carbon black (A-2), a usage amount of the titanium black (A-1) is 50 parts by weight to 75 parts by weight.

A resin composition and a filter element are provided. The resin composition includes a black coloring agent (A), an ethylenically-unsaturated monomer (B), a solvent (C), a resin (D), and a photoinitiator (E). The black coloring agent (A) includes a titanium black (A-1) and a carbon black (A-2). Based on a total usage amount of 100 parts by weight of the titanium black (A-1) and the carbon black (A-2), a usage amount of the titanium black (A-1) is 50 parts by weight to 75 parts by weight.

A resin composition and a filter element are provided. The resin composition includes a black coloring agent (A), an ethylenically-unsaturated monomer (B), a solvent (C), a resin (D), and a photoinitiator (E). The black coloring agent (A) includes a titanium black (A-1) and a carbon black (A-2). Based on a total usage amount of 100 parts by weight of the titanium black (A-1) and the carbon black (A-2), a usage amount of the titanium black (A-1) is 50 parts by weight to 75 parts by weight.

Flame retardant thermoplastic compositions that are capable of being used in a laser direct structuring process. The compositions include a thermoplastic resin, a laser direct structuring additive, and a flame retardant. The compositions offer flame retardant characteristics while also substantially maintaining the mechanical properties of the base thermoplastic resin, such as the impact strength and/or HDT of the composition. The compositions can be used in a variety of applications such as personal computers, notebook and portable computers, cell phone and other such communications equipment.