A composition includes a polymer (1) having a partial structure represented by formula (1), and a solvent. X is a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group having 1 to 5 carbon atoms, a hydroxyalkyl group having 1 to 5 carbon atoms, or a halogenated alkyl group having 1 to 5 carbon atoms. Y is a monovalent organic group having 1 to 12 carbon atoms and containing a hetero atom or a monovalent inorganic acid group. Z is a linking group represented by —O—, —S—, or —NR—, where R is an organic group having 1 to 20 carbon atoms. R.sup.1 and R.sup.2 are each independently a hydrogen atom, a halogen atom, or an organic group having 1 to 20 carbon atoms, or the like.

##STR00001##

Disclosed herein is a composition comprising a block copolymer; where the block copolymer comprises a first polymer and a second polymer; where the first polymer and the second polymer of the block copolymer are different from each other and the block copolymer forms a phase separated structure; an additive polymer; where the additive polymer comprises a bottlebrush polymer; and where the bottlebrush polymer comprises a polymer that is chemically and structurally the same as one of the polymers in the block copolymer or where the bottlebrush polymer comprises a polymer that has a preferential interaction with one of the blocks of the block copolymers; and a solvent.

A laminate is provided which includes a structural body including a base portion and a through hole and which can concurrently satisfy operability and stickiness during processes such as fitting, can be released with no or little adhesive residue, and also exhibits excellent adhesion to various adherends, especially metals. The laminate includes a substrate and a structural body disposed on the surface of at least one side of the substrate, the structural body including a base portion and a through hole. The base portion of the structural body includes an acrylic triblock copolymer (I) that includes two polymer blocks (A1) and (A2) each including methacrylic acid ester units and one polymer block (B) including acrylic acid ester units represented by the general formula CH.sub.2═CH—COOR.sup.1 (1) (wherein R.sup.1 denotes a C1-C3 organic group). The acrylic triblock copolymer (I) has an (A1)-(B)-(A2) block structure and a weight average molecular weight of 50,000 to 250,000. The total content of the polymer blocks (A1) and (A2) is not more than 35 mass % of the acrylic triblock copolymer (I).

The present invention provides a dental polymerizable composition that requires less discharging force, is easily formable, has low polymerization shrinkage stress during curing, and exhibits high stain resistance and surface gloss when cured. The present invention relates to a dental polymerizable composition including a (meth)acrylic block copolymer (A), a polymerizable monomer (B), and a polymerization initiator (C). The (meth)acrylic block copolymer (A) consists of a (meth)acrylic polymer block (a) having a curable functional group and a (meth)acrylic polymer block (b) having no curable functional group. The curable functional group has a partial structure represented by the following general formula (1):

##STR00001##

The invention provides active energy ray curable compositions which exhibit good curability with active energy rays and which have a low viscosity to attain excellent application properties when applied as materials such as adhesives or coatings onto substrates and can give highly flexible cured products upon irradiation with active energy rays. An active energy ray curable composition includes a (meth)acrylic triblock copolymer (A) including a (meth)acrylic polymer block(s) (aA) having an active energy ray curable group containing a partial structure represented by the following general formula (1), and a (meth)acrylic polymer block(s) (bA) having no active energy ray curable groups, and a (meth)acrylic diblock copolymer (B) including a (meth)acrylic polymer block (aB) having an active energy ray curable group containing a partial structure represented by the following general formula (1), and a (meth)acrylic polymer block (bB) having no active energy ray curable groups, the composition having a ratio of Mn (bB)/Mn (bA) in the range of 0.2 to 2.0 wherein Mn (bB) is the number average molecular weight of the (meth)acrylic polymer block (bB) present in the (meth)acrylic diblock copolymer (B), and Mn (bA) is the number average molecular weight of the (meth)acrylic polymer block (bA) present in the (meth)acrylic triblock copolymer (A).

##STR00001## (In the formula, R.sup.1 is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms.)

The present invention provides pressure-sensitive adhesive compositions which have excellent adhesion force, cohesion force, tack and holding power, and pressure-sensitive adhesive products including the pressure-sensitive adhesive compositions. The pressure-sensitive adhesive composition includes (i) 100 parts by mass of an acrylic block copolymer (I) including at least one polymer block (A) containing methacrylate ester units and at least one polymer block (B) containing acrylate ester units, the acrylic block copolymer (I) having a weight average molecular weight of 30,000 to 300,000, the acrylate ester units in the polymer block (B) including not less than 80 mass % of units from an acrylate ester (1) represented by the general formula (1):

CH.sub.2═CH—COOR.sup.2

(wherein R.sup.2 is an organic group having 7 to 12 carbon atoms); (ii) 1 to 300 parts by mass of a tackifier resin; and (iii) 1 to 200 parts by mass of at least one plasticizer selected from process oils, and organic acid esters and oligomers thereof.

Provided are a block copolymer having a narrow molecular weight distribution such that the copolymer can be used in a DSA technique, a block copolymer intermediate thereof, and methods for producing the same. A block copolymer intermediate represented by the general formula (1) or (2) is used:

##STR00001##

wherein, in the general formulae (1) and (2), each of R.sup.1 and R.sup.3 independently represents a polymerization initiator residue, each of R.sup.2 and R.sup.4 independently represents an aromatic group or an alkyl group, Y.sup.1 represents a polymer block of (a)an (meth)acrylic acid ester, Y.sup.2 represents a polymer block of styrene or a derivative thereof, L represents an alkylene group having 1 to 6 carbon atoms, X represents a halogen atom, and each of m and n independently represents an integer of 1 to 5.

Provided are a block copolymer having a narrow molecular weight distribution such that the copolymer can be used in a DSA technique, a block copolymer intermediate thereof, and methods for producing the same. A block copolymer intermediate represented by the general formula (1) or (2) is used:

##STR00001##

wherein, in the general formulae (1) and (2), each of R.sup.1 and R.sup.3 independently represents a polymerization initiator residue, each of R.sup.2 and R.sup.4 independently represents an aromatic group or an alkyl group, Y.sup.1 represents a polymer block of (a)an (meth)acrylic acid ester, Y.sup.2 represents a polymer block of styrene or a derivative thereof, L represents an alkylene group having 1 to 6 carbon atoms, X represents a halogen atom, and each of m and n independently represents an integer of 1 to 5.

Provided are a block copolymer having a narrow molecular weight distribution such that the copolymer can be used in a DSA technique, a block copolymer intermediate thereof, and methods for producing the same. A block copolymer intermediate represented by the general formula (1) or (2):

##STR00001##

wherein, in the formulae (1) and (2), each of R.sup.1 and R.sup.3 independently represents a polymerization initiator residue, each of R.sup.2 and R.sup.4 independently represents an aromatic group or an alkyl group, Y.sup.1 represents a polymer block of (a)an (meth)acrylic acid ester, Y.sup.2 represents a polymer block of styrene or a derivative thereof, L represents an alkylene group or a phenylene group, X represents a halogen group, and each of m and n independently represents an integer of 1 to 5.

A block copolymer is disclosed. The block copolymer has a structure of formula (V) below:

[D].sub.x-[E].sub.y-[F].sub.z  (V) wherein D, E, and F are each independently a compound of formula (VI) below, and D, E, and F are different from each other; and x, y, and z are each independently an integer from 1 to 40;

##STR00001## wherein A.sub.2 is O or S; R.sub.7 is H or a C.sub.1-6 alkyl; and R.sub.8 is a C.sub.1-12 alkyl, (CH.sub.2).sub.qN(R.sub.11).sub.2, CH.sub.2(CH.sub.2OCH.sub.2).sub.rCH.sub.2N(R.sub.12).sub.2, or CH.sub.2(CH.sub.2OCH.sub.2).sub.sCH.sub.2OR.sub.13, wherein R.sub.11, R.sub.12, and R.sub.13 are each independently a C.sub.1-6 alkyl; and q, r, and s are each independently an integer from 1 to 10.