Abstract: The present invention provides a material for forming a protective film that has favorable alkali solubility and gives a protective film excelling in water repellency, as well as a method for forming a photoresist pattern using this material for forming a protective film. The material for forming a protective film of the present invention contains an alkali-soluble polymer having a unit derived from a monomer represented by the following general formula (A-1) as a constitutional unit. In the general formula (A-1), R1 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or the like; R2, R3, and R4 are each independently an alkylene chain having 1 to 6 carbon atoms or the like; R5 and R6 are each independently an alkyl group or fluoroalkyl group having 1 to 15 carbon atoms or the like; and at least one of R5 and R6 is a fluoroalkyl group; Z is an alkylene chain having 1 to 2 carbon atoms or an oxygen atom; m is 0 or 1; and n is an integer of 0 to 3.

Abstract: Disclosed are coating compositions that include a continuous phase that includes water and a dispersed phase that includes a microgel having a mean particle size of greater than 50 nanometers. The microgel is formed from reactants selected so as to provide a copolymer having a certain calculated Tg and includes a cycloaliphatic (meth)acrylate.

Abstract: An aqueous dispersion of polymer particles of a water-insoluble vinyl polymer containing a hydrophobic dye, wherein the water-insoluble vinyl polymer is prepared by polymerizing a monomer composition comprising an alicyclic (meth)acrylate, a salt-forming group-containing monomer, and a monomer copolymerizable with the alicyclic (meth)acrylate and the salt-forming group-containing monomer; and an ink comprising the aqueous dispersion. The aqueous dispersion is excellent in, for instance, storage stability, and the ink is excellent in, for instance, printing reliability, solvent resistance, water resistance and character quality.

Abstract: Polymer capsules from amphiphilic graft copolymers comprising reactive, hydrophobic polyolefin backbones, and hydrophilic poly(ethylene glycol) (PEG) grafts are produced by self-assembly of the polymers at the oil-water interface, and crosslinking the assembly with bis-cyclooctene PEG derivatives in conjunction with ring-open metathesis polymerization catalysts. The use of the graft copolymer architecture in capsule synthesis provides significant opportunities to tune both the surface properties, in terms of recognition, and the membrane properties, in terms of mechanical strength, encapsulation, and release.

Abstract: The present invention has an object to provide a photosensitive resin composition for optical waveguide formation, which has low transmission loss and can form a waveguide pattern with high shape accuracy at low cost; an optical waveguide; and a method for producing an optical waveguide. The present invention provides a photosensitive resin composition for optical waveguide formation comprising at least: a polymer containing at least a (meth)acrylate structure unit having an epoxy structure, and a (meth)acrylate structure unit having a lactone structure and/or a vinyl monomer structure unit having an aromatic structure; and a photoacid generator, of which one or both of a core layer and a cladding layer are formed of a cured product.

Abstract: The present invention provides a composition for forming a top anti-reflection coating having a low refractive index, realizing a gradual swing curve and giving a small swing ratio. This composition comprises a solvent and an anthracene skeleton-containing polymer having a hydrophilic group. The composition forms an anti-reflection coating on a photoresist film, and can be used in a photolithographic process for forming a pattern by use of light having a wavelength of 160 to 260 nm.

Abstract: A monomer compound that contains at least one polymerizable functional group per molecule, and at least one bicycloheptyl-, bicycloheptenyl-, or branched (C5-C42)alkyl-polyether radical per molecule, wherein the bicycloheptyl- or bicycloheptenyl-polyether radical may optionally be substituted on one or more of the ring carbon atoms by one or two (C1-C6)alkyl groups per ring carbon atom is useful in making polymers, particularly pH responsive polymers.

Abstract: The use of an addition polymer A composed in copolymerized form of 0.1% to 40% by weight of at least one C3 to C30 alkene, 40% to 99.9% by weight of at least one ethylenically unsaturated C3 to C6 monocarboxylic acid, 0% to 50% by weight of at least one ethylenically unsaturated C4 to C12 dicarboxylic acid and/or of the ethylenically unsaturated dicarboxylic monoalkyl esters or dicarboxylic anhydrides obtainable from said acid, and 0% to 30% by weight of at least one other ethylenically unsaturated compound which is copolymerizable with the aforementioned monomers, as a dispersing assistant in free-radically initiated aqueous emulsion or suspension polymerization.

Abstract: Acid-sensitive, developer-soluble bottom anti-reflective coating compositions are provided, along with methods of using such compositions and microelectronic structures formed thereof. The compositions preferably comprise a crosslinkable polymer dissolved or dispersed in a solvent system. The polymer preferably comprises recurring monomeric units having adamantyl groups. The compositions also preferably comprise a crosslinker, such as a vinyl ether crosslinking agent, dispersed or dissolved in the solvent system with the polymer. In some embodiments, the composition can also comprise a photoacid generator (PAG) and/or a quencher. The bottom anti-reflective coating compositions are thermally crosslinkable, but can be decrosslinked in the presence of an acid to be rendered developer soluble.

Abstract: The present invention relates to a polycycloolefin (PCO) thermoset network assembly and a process for its preparation obtainable by polymerising a first reactive composition comprising a norbornene-type cycloolefin monomer in the presence of a Mo- or W-catalyst to obtain a PCO-Mo/W-network and polymerising a second reactive composition comprising a nor-bornene-type cycloolefin monomer in the presence of a Ru-catalyst on said PCO-Mo/W-network to obtain a PCO thermoset network assembly.

Abstract: Disclosed are: a material for forming a protective film to be laminated on a photoresist film, which can prevent the contamination of an exposing device with an outgas generated from the photoresist film, which has little influence on the environment, which has a high water repellent property, which sparingly causes mixing with the photoresist film, and which can form a high-resolution photoresist pattern; a method for forming a photoresist pattern; and a solution for washing/removing a protective film. Specifically disclosed are: a material for forming a protective film, which comprises (a) a non-polar polymer and (b) a non-polar solvent; a method for forming a photoresist pattern by using the material; and a solution for washing/removing a protective film, which is intended to be used in the method.

Abstract: A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of main-chain carbon-carbon double bonds of a ring-open polymer which is obtained by ring-opening polymerization of 2-norbornene is disclosed. The hydrogenated norbornene ring-open polymer has a weight average molecular weight (Mw) determined by gel permeation chromatography (GPC) of 50,000 to 200,000, a molecular weight distribution (Mw/Mn) of 1.5 to 10.0, and a melting point of 110 to 145° C.

Abstract: Disclosed is a bather laminate comprising at least one organic layer and at least one inorganic layer on a surface of the organic layer, wherein the organic layer is formed by curing a polymerizable composition comprising a compound having a triphenylene skeleton and a polymerizable group.

Abstract: A pigment dispersion includes a pigment and a block copolymer having ionic aromatic monomers. The pigment dispersions can be used for manufacturing inkjet inks and for the coating of colored layers. A process for preparing the pigment dispersion is also disclosed.

Abstract: A pigment dispersion includes a pigment with at least one carboxylic acid group and a block copolymer including aromatic monomers having at least one carboxylic acid group or a salt thereof and aromatic monomers having at least one sulfonic acid group or a salt thereof. The pigment dispersions can be used for manufacturing inkjet inks and for the coating of colored layers.

Abstract: The invention provides useful organic insulating materials exhibiting low permittivity, high heat resistance and high mechanical strength, as well as resin films and semiconductor devices employing them. The organic insulating materials of the invention comprise prepolymers of adamantane structure compounds having polymerizable unsaturated bond-containing groups. The prepolymers have number-average molecular weights of between 2,000 and 500,000 based on polystyrene, as measured by gel permeation chromatography. The polymerizable unsaturated bond-containing groups are preferably groups that contain carbon-carbon triple bonds. The resin films of the invention are obtained by crosslinking reaction of the organic insulating materials or varnishes for resin film containing them, by heating and/or active irradiation, and condensation reaction.

Abstract: There are provided organic insulating materials exhibiting low permittivity, high heat resistance and high mechanical strength, as well as organic insulating films with low permittivity, high heat resistance and high mechanical strength that employ the same, and semiconductor devices comprising the foregoing. An organic insulating material comprising a compound represented by general formula (1), or a polymer obtained by polymerizing a compound represented by general formula (1), or a mixture of a compound represented by general formula (1) and the polymer. X-V?W?nY??(1) (In formula (1), X and Y each independently represent one or more groups with polymerizable functional groups. V and W each represent a group having an adamantane or polyamantane structure, and they may be the same or different. The letter n represents an integer of 0 or greater).

Abstract: The present invention provides a polymer comprising a structural unit represented by the formula (Ia) or (Ib): wherein R1 represents a hydrogen atom etc., R2 represents a linear, branched chain or cyclic C1-C8 alkyl group, R3 represents a methyl group, n represents an integer of 0 to 14, Z1 represents a single bond etc., k represents an integer of 1 to 4, R4 and R5 each independently represents a hydrogen atom etc., and m represents an integer of 1 to 3, a structural unit represented by the formula (II): wherein R6 and R7 each independently represents a hydrogen atom etc., R8 represents a methyl group, R9 represents a hydrogen atom etc., Z2 represents a single bond etc., k? represents an integer of 1 to 4, Z? represents a group capable to eliminate by an action of an acid, and a structural unit represented by the formula (III): wherein R10 represents a carboxyl group etc., l? represents an integer of 0 to 3, Z3 represents a single bond etc., and k? represents an integer of 1 to 4.

Abstract: Polymer capsules from amphiphilic graft copolymers comprising reactive, hydrophobic polyolefin backbones, and hydrophilic poly(ethylene glycol) (PEG) grafts are produced by self-assembly of the polymers at the oil-water interface, and crosslinking the assembly with bis-cyclooctene PEG derivatives in conjunction with ring-open metathesis polymerization catalysts. The use of the graft copolymer architecture in capsule synthesis provides significant opportunities to tune both the surface properties, in terms of recognition, and the membrane properties, in terms of mechanical strength, encapsulation, and release.

Abstract: In order to provide an ink composition which is excellent in color development, stability and fixability and, more particularly, an ink for ink jet recording which is excellent in color development, stability and fixability, is excellent as a textile ink for ink jet recording, and is excellent in ejection stability of the ink from an ink jet head, an ink composition includes a dispersion element having an average particle diameter of 50 nm to 300 nm, which allows a pigment to be dispersed in water; polymer fine particles synthesized using at least alkyl(meth)acrylate and/or cyclic alkyl(meth)acrylate as components thereof, having a glass transition temperature of ?10° C. or below and having an acid value of 100 mgKOH/g or less; and a reactant.

Abstract: There are provided an ink set including an ink composition having excellent color developability, ejection stability, and fixity and a pigment fixer having excellent abrasion resistance and dry-cleaning resistance; a method for producing an ink jet recorded matter with the ink set, the ink jet recorded matter having excellent color developability, ejection stability, abrasion resistance, and dry-cleaning resistance; and an ink jet recorded matter obtained by the method. An ink set includes an ink composition containing a water-dispersible pigment dispersoid and polymeric microparticles having a glass transition temperature of ?10° C. or lower, an acid value of 100 mg KOH/g or less, and prepared using at least alkyl (meth)acrylate and/or cyclic alkyl (meth)acrylate, and a pigment fixer containing a reaction agent.

Abstract: A film forming composition includes a compound having a cage structure; and a compound having a conjugated diene structure.

Abstract: A novel cycloolefin copolymer that can be employed in the production of molding with fewer defects, for example, fewer gel particles (fish eyes). There is provided a cycloolefin copolymer comprising 80 to 20 mol % of repeating units derived from an ?-olefin monomer and 20 to 80 mol % of repeating units derived from at least one cycloolefin monomer selected from the group consisting of monomer of the general formula (I), monomer of the general formula (II), monomer of the general formula (III), monomer of the general formula (IV) and monomer of the general formula (V), wherein with respect to the repeating units derived from cycloolefin monomer, the proportion thereof being present in the form of dimer (Rd) is 50 mol % or below and the proportion thereof being present in the form of trimer (Rt) 5 mol % or above.

Abstract: A method of producing a cyclic polyolefin film comprising: dissolving or dispersing a cyclic polyolefin resin and at least one compound selected from a higher fatty acid and a derivative of the higher fatty acid in a solvent; a casting step; a drying step; and a taking-up step; and a method of preparing a liquid dispersion of fine particles, which comprises: subjecting fine particles, an organic solvent and a dispersant to a dispersing treatment, wherein the dispersant contains a cyclic olefin resin.

Abstract: The present invention relates to a unified polarizing plate, which employs, as a protection layer of a polarizing film, a transparent film that can simultaneously function as a negative C-plate and transparent protection layer of a polarizing film and has negative refractive index toward thickness direction, thereby simultaneously performing functions as a negative C-plate for optical compensation and as a polarizing plate, and a method for preparing the same. The unified polarizing plate has superior durability at high temperature and high humidity compared to those employing TAC as a protection layer, and improves wide view angle of liquid crystal display having positive refractive index toward thickness direction, when the liquid crystal display device is ON or OFF.

Abstract: A resin composition includes an alicyclic structure-containing polymer; a hindered amine compound; and a releasing agent, wherein the releasing agent and the alicyclic structure-containing polymer satisfy the following relationship: 10?|s1?s2|?0.8 [(MPa)0.5], wherein s1 represents a solubility parameter of the releasing agent, and s2 represents a solubility parameter of the alicyclic structure-containing polymer. The resin composition can be used as optical materials, such as a lens, a diffraction grating, and a prism, especially in the field of using blue laser, and has excellent releasability, transparence and colorless property as well as excellent resistance to laser.

Abstract: A composition includes a coupling agent composition and a polymer precursor. The coupling agent composition includes an aromatic amine and a first cycloolefin substituted with at least one epoxy group. The polymer precursor includes a second cycloolefin. The coupling agent composition is capable of bonding to a filler having a corresponding binding site and the coupling agent composition is compatible with a metathesis catalyst capable of catalyzing a ring-opening metathesis polymerization reaction when contacted to the first cycloolefin or the second cycloolefin. An associated method is also provided.

Abstract: A composition includes a first cycloolefin substituted with at least one epoxy group and an aromatic amine. The composition is capable of bonding to a filler having a corresponding binding site. The composition is compatible with a metathesis catalyst capable of catalyzing a ring-opening metathesis polymerization reaction when contacted to the first cycloolefin. An associated method is also provided.

Abstract: A norbornene-based resin molded article obtained by bulk polymerizing a norbornene-based monomer in a mold; wherein said norbornene-based resin molded article is characterized by comprising a hybrid filler obtained by high-speed mixing the two or more kinds of fillers in dry method. Preferably, said hybrid filler is obtained by high-speed mixing, at least a fibrous filler having 5 to 100 aspect ratio and a particulate filler having 1 to 2 aspect ratio, in dry method. The present invention provides the norbornene-based resin molded article superior in rigidity and dimensional stability; and the method of production thereof.

Abstract: A crosslinkable or crosslinked rubber composition is described which includes a diene elastomer having a mass content of cyclic vinyl units of greater than 15%, and which may be used to form a tire tread. Also described is a tire tread and a tire incorporating the tread. The composition contains a linear or branched diene elastomer derived from at least one conjugated diene, and a reinforcing filler. The elastomer has cyclic vinyl units according to a mass content of greater than or equal to 15% and a number-average molecular weight of from 30,000 to 350,000 g/mol. The elastomer may be obtained by anionic polymerization of one or more monomers including a conjugated diene in an inert hydrocarbon solvent with a catalytic system including an organolithium initiator and a polar agent with several heteroatoms. The reaction may be performed batchwise where the polar agent:initiator molar ratio is greater than 8, or continuously where the polar agent:initiator molar ratio is greater than or equal to 3.

Abstract: Polymerizable compositions comprising particularly useful for brightness enhancing films.

Abstract: A cyclic olefin resin composition which can be suitably used as a material for a substrate having low permittivity, low dielectric tangent, low water absorbability, excellent heat resistance, and the like, and a substrate obtained from the resin composition are provided. In particular, there is provided a novel cyclic olefin resin composition that can be suitably used as a material for a substrate for high frequency circuit dealing with high frequency signal transmission. The cyclic olefin resin composition comprises (A) 5 to 95 parts by weight of a cyclic olefin polymer having a glass transition temperature of 60 to 200° C. and (B) 5 to 95 parts by weight of a flexible copolymer, prepared by polymerizing at least two monomers selected from the group consisting of an olefin compound, a diene compound and an aromatic vinyl hydrocarbon compound, and having a glass transition temperature of 0° C. or below.

Abstract: The invention concerns a method for dispersing carbon nanotubes in a polymer matrix including a step of preparing carbon nanotubes coated with a polymer coating by a method for polymerizing a monomer using a catalytic system wherein carbon nanotubes are used as catalytic support, the carbon nanotubes comprising in surface the catalytic system for polymerizing the coating polymer, and the coating polymer being non-miscible in the host polymer matrix, followed by a step of hot process mixing of the coated carbon nanotubes with a polymer matrix.

Abstract: The invention relates to aqueous crosslinkable binder dispersions comprising hydroxy-functional copolymers based on ethylene glycol monoallyl ether, to a process for preparing them and to the use of the dispersions in coating materials.

Abstract: A polymer obtained by polymerizing, in a presence of a polymerization initiator, a compound having a cage structure with at least 11 carbon atoms and an ethylenic double bond; a film forming composition containing the polymer; an insulating film formed using the composition; and an electronic device.

Abstract: A film forming composition includes a polymer of a compound represented by formula (I): wherein R1, R2 and R3 each independently represents a substituent containing a carbon-carbon double bond or carbon-carbon triple bond; X1, X2 and X3 each independently represents any substituent; l and n each stands for an integer of from 0 to 15 and m stands for an integer of from 0 to 14, with the proviso that l, m and n do not represent 0 simultaneously; o and q each independently stands for an integer of from 0 to 15 and p independently stands for an integer of from 0 to 14; and r stands for 0 or 1, with the proviso that when r=0, R1 and R3 each independently represents a substituent containing a carbon-carbon double bond.

Abstract: An insulating material comprising a cycloolefin polymer, specifically, an interlayer insulating material for a high-density assembly board having interlayer-connecting via holes at most 200 ?m in diameter, comprising a cycloolefin polymer containing at least 50 mol % of a repeating unit derived from a cycloolefin monomer; a dry film formed from a curable resin composition comprising a polymer having a number average molecular weight within a range of 1,000 to 1,000,000 as measured by gel permeation chromatography, and a hardener; and a resin-attached metal foil obtained by forming a film of a cycloolefin polymer on one side of a metal foil. Laminates, multi-layer laminates and build-up multi-layer laminates making use of these materials, and production processes thereof.

Abstract: A copolymer of a strait chain ?-olefin and a vinyl compound (I) represented by the general formula CH2?CH—R, wherein R is a hydrocarbon group, the steric parameter Es of the substituent R is ?1.64 or less and the steric parameter B1 of the substituent R is 1.53 or more, an adhesive containing the same as an effective ingredient, and an laminate containing the adhesive.

Abstract: There are provided a novel norbornene derivative which is a material for a chemically amplifying type photoresist for F2 laser, possesses excellent transparency and improved dry etching resistivity and has a fluorine-containing ketone unit or fluorine-containing tertiary alcohol unit directly bonded to the norbornene backbone; a fluorine-containing polymer obtained by using the norbornene derivative as a copolymerizable monomer; and a chemically amplifying type photoresist composition comprising the fluorine-containing polymer, a photoacid generator and a solvent.

Abstract: The invention relates to aqueous crosslinkable binder dispersions comprising hydroxy-functional copolymers based on ethylene glycol monoallyl ether, to a process for preparing them and to the use of the dispersions in coating materials.

Abstract: A cyclic olefin addition copolymer obtained by copolymerizing a cyclic olefin compound having a side chain substituent group with a ring structure, such as endo-tricyclo[4.3.0.12,5]deca-3,7-diene or endo-tricyclo[4.3.0.12,5]deca-3-ene, with another cyclic olefin compound such as bicyclo[2.2.1]hept-2-ene, and further with a cyclic olefin compound having a hydrolysable silyl group as needed, or hydrogenating after copolymerization; a composition for crosslinking in which a specific crosslinking agent is incorporated; a crosslinked product obtained by crosslinking the composition; an optical material containing the copolymer, the composition or the crosslinked product; and a method for producing the copolymer in which addition polymerization is conducted using a specific nickel catalyst.

Abstract: A melt-moldable, thermoplastic norbornene resin composition characterized by being obtained by compounding (A) a base polymer comprising a thermoplastic norbornene resin with (B) an olefin compound having a number-average molecular weight of 200 to 10,000 and a softening point of 70 to 170° C.; and a molded article or optical film obtained by melt-molding or extrusion-molding the thermoplastic norbornene resin composition.

Abstract: A ring-opened metathesis copolymer and its hydrogenated product having a desired monomer unit ratio and a high molecular weight and having hydroxyl groups or hydroxycarbonyl groups can be obtained by conducting a ring-opening metathesis copolymerization of a norbornene-type monomer having hydroxyl groups or hydroxycarbonyl groups with an unsubstituted norbornene-type monomer having at least three rings in the presence of a catalyst predominantly comprised of an organic ruthenium compound having coordinated therewith a neutral electron-donating ligand, and, if desired, hydrogenating the resulting copolymer. The thus-obtained ring-opened metathesis copolymer and its hydrogenation product are characterized by having a low water absorption, good adhesion to metal and other materials, good compatibility with a curing agent and other compounds, and high heat resistance, and exhibiting reduced signal retardation and signal noise.

Abstract: Disclosed are a colorant which can realize an ink compositions possessing excellent lightfastness, waterfastness, color development, and rubbing/scratch resistance, and an ink composition containing the same. The ink composition comprises at least a colorant, a polymer covering the colorant and having, in its molecular chain, sites possessing ultraviolet absorbing activity and/or photostabilizing activity, water, and a water-soluble organic solvent. The ink composition according to the present invention include two preferred embodiments. In the ink composition according to the first preferred embodiment, the polymer functions as a dispersant and covers the colorant. In the ink composition according to the second preferred embodiment, the polymer is in the form of fine particles covering the colorant.

Abstract: This invention provides a multi-layer circuit board excellent in flame resistance, insulating property and adhesion and not generating detrimental substances when burnt, and a curable composition suitable for obtaining the multi-layer circuit board. The curable composition contains an insulating resin such as an alicyclic olefin polymer or an aromatic polyether polymer, a nitrogen-type curing agent such as 1,3-diallyl-5-glycidyl isocyanurate and a phosphorus-type flame retardant such as phosphoric acid ester amide, and is molded into a film by a solution casting method. The film so formed is laminated on an internal layer board and is cured to give the multi-layer circuit substrate.

Abstract: A release agent for bituminous material is disclosed which comprises a mineral oil-free composition containing an aqueous dispersion of a polyalkenamer, preferably a polyoctenamer. The release agent may additionally contain a dispersing agent and at least one fatty acid ester. The release agent also may be used for the cleaning of surfaces such as motor vehicles, road making machines and environmental surfaces contaminated with bituminous material.

Abstract: An anti-reflection coating-forming composition is provided. This composition includes a polymer and a solvent. The polymer has a structural unit represented by the formula (1): wherein R1 is a monovalent atom other than a hydrogen atom or a monovalent group, and n is an integer of 0-4, provided that when n is an integer of 2-4, a plural number of R1's are the same or different; R2 and R3 are each a monovalent atom or group; and X is a bivalent group. The anti-reflection coating formed from this composition has a high antireflective effect, does not generate intermixing with a resist film, and enables a good resist pattern profile excellent in resolution and precision in cooperation with a positive or negative resist.

Abstract: A polymer dispersant for pigments based on a graft copolymer which contains a new type of urea functional group as the pigment anchoring group. The urea groups are attached to the graft copolymer by a convenient method which involves reaction of hydroxyl functional groups built in the graft copolymer with a diisocyanate that is capped at one end with ammonia or a primary or secondary amine. The reaction is convenient and clean. Substantial crosslinking or gelling of the polymer can be easily avoided by judicious selection of appropriate ingredients and processing conditions. These materials are effective in dispersing and stabilizing a wide range of pigments in solvent based systems and are particularly useful in forming pigment dispersions that are used in a variety of solvent borne coating compositions for automobiles and trucks, where they provide improved efficiency of pigment use, lower paint viscosity, and reduced emission of volatile organic solvent.

Abstract: A layer-forming antireflective composition is proposed which contains as a base polymer poly(hydroxyamide) or polybenzoxazole and as dye component at least one dye from the classes of the methine dyes, methine dye derivatives, azomethine dyes, azomethine dye derivatives, coumarin dyes, coumarin dye derivatives, triphenylmethane dyes, triphenylmethane dye derivatives and/or an azo dye.

Abstract: The invention relates to a release agent for bituminous material, characterized by a mineral oil-free composition containing an aqueous dispersion of a polyalkenamer, preferably of a polyoctenamer. The release agent may additionally contain a dispersing agent and at least one fatty acid ester. The release agent may also be used for the cleaning of surfaces contaminated with bituminous material.