A metal complex of the formula (1) TCyLMZ.sub.p (1), wherein M is a group 4 metal, Z is an anionic ligand, p is the number 1 or 2, TCy is a thiophene-fused cyclopentadienyl-type ligand of the formula (2) ##STR00001##
is described. Methods of making and using the metal complex are also described.

A photocurable composition can comprise a polymerizable material, a fullerene or fullerene derivative in an amount of at least 0.2 wt % and not greater than 5.0 wt %, and a photoinitiator and may be adapted for AIP or NIL processing. A photo-cured layer made from the photocurable composition can have an improved thermal stability in comparison to a photo-cured layer made from the same photocurable composition except not containing a fullerene or fullerene derivative.

A polymer composition comprising a star-branched copolymer having a plurality of arms is disclosed. Each polymer arm has a molecular weight Mp of from 1 kg/mol to 50 kg/mol and comprises polymerized units (i) derived from a first vinyl aromatic monomer comprising a radical-reactive group, wherein from greater than 10 mol % to 100 mol % of the units (i) are unhydrogenated; and optionally, polymerized units (ii) comprising hydrogenated and unhydrogenated forms of polymerized units derived from a high Tg monomer, and hydrogenated form of polymerized units (i) or hydrogenated form of polymerized styrene units; and optionally, polymerized units (iii) comprising (a) hydrogenated form of polymerized units derived from one or more acyclic conjugated dienes, and (b) polymerized units derived from one or more of a second vinyl aromatic monomer; wherein less than 10 wt. % of units (a) are unhydrogenated.

Provided is a hydrogenated block copolymer, which is a hydrogenation product of a block copolymer including a polymer block (A) containing more than 70 mol % of a structural unit derived from an aromatic vinyl compound and a polymer block (B) containing 30 mol % or more of a structural unit derived from at least one selected from the group consisting of a conjugated diene compound and isobutylene, the hydrogenated block copolymer being satisfied with the following requirements (1) and (2): Requirement (1): the content of the polymer block (A) in the block copolymer is 1 to 30% by mass; and Requirement (2): when the polymer block (B) is regarded as having a structure with a hydrogenation rate of 100 mol %, an average value of a methylene chain length of a main chain of the structural unit derived from at least one selected from the group consisting of a conjugated diene compound and isobutylene is 1.0 to 6.0.

Composites made of a cross-linked acrylic polymer and an inorganic aggregate and/or mineral, with the cross-linked acrylic polymer being present at a concentration of 5% to 17%, by weight, are disclosed. Processes of preparing the composites are also disclosed.

A modification method of a surface of a substrate includes: applying a composition on a surface of a metal substrate, and heating a coating film formed by the applying, wherein the composition contains: a polymer having a first structural unit that includes an aromatic ring, and a second structural unit that includes an ethylenic double bond; a thermal acid generating agent; and a solvent, wherein the polymer has a functional group capable of bonding to a metal atom in the metal substrate.

A modification method of a surface of a substrate includes: applying a composition on a surface of a metal substrate, and heating a coating film formed by the applying, wherein the composition contains: a polymer having a first structural unit that includes an aromatic ring, and a second structural unit that includes an ethylenic double bond; a thermal acid generating agent; and a solvent, wherein the polymer has a functional group capable of bonding to a metal atom in the metal substrate.

The present invention is directed to a rubber composition comprising an elastomer, a filler, and a block-copolymer. According to the invention, the block-copolymer comprises (i) an elastomer block and (ii) a thermoplastic block comprising a poly alkylacrylate, wherein the alkylacrylate comprises a polycyclic substituent at its single bonded oxygen atom. Moreover, the present invention is directed to a block-copolymer.

A copolymer is formed by reacting (A) aromatic monomer, an oligomer thereof, or a polymer thereof, with (B) aliphatic monomer, an oligomer thereof, or a polymer thereof. The aromatic monomer has a chemical structure of

##STR00001##

in which each of R.sup.1 is independently H or CH.sub.3, and n=1-4. R.sup.2 is a single bond, —O—,

##STR00002##

Each of R.sup.3 is independently

##STR00003##

A copolymer is formed by reacting (A) aromatic monomer, an oligomer thereof, or a polymer thereof, with (B) aliphatic monomer, an oligomer thereof, or a polymer thereof. The aromatic monomer has a chemical structure of

##STR00001##

in which each of R.sup.1 is independently H or CH.sub.3, and n=1-4. R.sup.2 is a single bond, —O—,

##STR00002##

Each of R.sup.3 is independently

##STR00003##