The resin composition of the present invention contains a maleimide compound (A) represented by the following formula (1); and a photo initiator (B) having an absorbance of 0.1 or more at a wavelength of 405 nm (h-line).

##STR00001##

In the formula (1), R.sub.1, R.sub.2, and R.sub.3 each independently represent an alkyl group or an alkoxy group which may have a hydrogen atom, a halogen atom, a hydroxyl group, or a substituent, R.sub.4 represents an alkylene group, an alkenylene group, an alkoxylene group, or an arylene group which may have a substituent, and R.sub.5 and R.sub.6 each independently represent a hydrogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms, or a linear or branched alkenyl group having 1 to 6 carbon atoms.

The resin composition of the present invention contains a maleimide compound (A) represented by the following formula (1); and a photo initiator (B) having an absorbance of 0.1 or more at a wavelength of 405 nm (h-line).

##STR00001##

In the formula (1), R.sub.1, R.sub.2, and R.sub.3 each independently represent an alkyl group or an alkoxy group which may have a hydrogen atom, a halogen atom, a hydroxyl group, or a substituent, R.sub.4 represents an alkylene group, an alkenylene group, an alkoxylene group, or an arylene group which may have a substituent, and R.sub.5 and R.sub.6 each independently represent a hydrogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms, or a linear or branched alkenyl group having 1 to 6 carbon atoms.

The resin composition of the present invention is a resin composition containing: a bismaleimide compound (A) containing a constituent unit represented by the following formula (1) and maleimide groups at both ends of the molecular chain; a compound (B) containing one or more carboxy groups; and a photo initiator (C).

##STR00001##

In the formula (1), R.sub.1 represents a linear or branched alkylene group having 1 to 16 carbon atoms, or a linear or branched alkenylene group having 2 to 16 carbon atoms. R.sub.2 represents a linear or branched alkylene group having 1 to 16 carbon atoms, or a linear or branched alkenylene group having 2 to 16 carbon atoms. Each R.sub.3 independently represents a hydrogen atom, a linear or branched alkyl group having 1 to 16 carbon atoms, or a linear or branched alkenyl group having 2 to 16 carbon atoms. Each n independently represents an integer of 1 to 10.

The present disclosure provides a modified allyl compound, and a modified bismaleimide prepolymer. The modified allyl compound is represented by formula (1), has a cyclopentadiene structure represented by formula (2), and contains a benzene ring or a benzene ring substituted with a linear alkane of lower polarity.

A polymer and a resin composition thereof are provided. The polymer includes a first repeat unit represented by Formula (I) and a second repeat unit represented by Formula (II)

##STR00001##

wherein A.sup.1 is C.sub.24-48 alkylene, C.sub.24-48 alkenylene, C.sub.24-48 alkynylene, C.sub.24-48 alicyclic alkylene, C.sub.24-48 alicyclic alkenylene, or C.sub.24-48 alicyclic alkynylene. A.sup.2 and A.sup.4, independently having at least one reactive group, are independently C.sub.6-25 arylene, C.sub.4-8 cycloalkylene, C.sub.5-25 heteroarylene, divalent C.sub.7-25 alkylaryl, divalent C.sub.7-25 acylaryl, divalent C.sub.6-25 aryl ether, divalent C.sub.7-25 acyloxyaryl, or divalent C.sub.6-25 sulfonylaryl; and, A.sup.3 is substituted or unsubstituted C.sub.6-25 arylene, C.sub.4-8 cycloalkylene, C.sub.5-25 heteroarylene, divalent C.sub.7-25 alkylaryl, divalent C.sub.7-25 acylaryl, divalent C.sub.6-25 aryl ether, divalent C.sub.7-25 acyloxyaryl, or divalent C.sub.6-25 sulfonylaryl.

A resin composition of the present invention contains: a maleimide compound (A) having a maleimide functional group equivalent of 300 g/eq. or more, and a transmittance of 1% or more at a wavelength of 405 nm (h-line); a maleimide compound (B) having a maleimide functional group equivalent of less than 300 g/eq.; and a photo initiator (C) having an absorbance of 0.1 or more at a wavelength of 405 nm (h-line).

Provided are a heat-curable maleimide resin composition suitable for use in a substrate, and whose cured product has an excellent high-temperature property due to its high glass-transition temperature, an excellent dielectric property and an excellent dimension stability; and an uncured and cured resin films comprised of such composition, and having an excellent handling property. The heat-curable maleimide resin composition contains: (A) a maleimide resin having a number average molecular weight of not lower than 3,000; (B) an organic compound having, in one molecule, at least one allyl group and at least one isocyanuric ring; and (C) a reaction initiator.

A bismaleimide compound (I) having a cyclic imide bond, which is obtained by a reaction of a diamine (A) derived from a dimer acid, a tetracarboxylic dianhydride (C) having an alicyclic structure, and maleic anhydride.

A bismaleimide compound (I) having a cyclic imide bond, which is obtained by a reaction of a diamine (A) derived from a dimer acid, a tetracarboxylic dianhydride (C) having an alicyclic structure, and maleic anhydride.

The present invention relates to a liquid crystal aligning agent composition including a terminal modifier of a specific chemical structure together with a polyimide or a precursor polymer thereof.