242 results about "Methacrylate polymers" patented technology

Provided are a thermoplastic resin composition which is excellent in oil resistance, heat resistance, weatherability, impact resistance, transparency, and moldability, and which can be produced economically, an elastomer composition with low hardness and high tensile strength which is excellent in oil resistance and compression set, and a molded object produced by molding the thermoplastic resin composition or elastomer composition. The composition is produced by compounding a thermoplastic resin or an elastomer with a block copolymer having at least one methacrylic ester polymer block and at least one acrylic ester polymer block. Also provided are a process for producing a methacrylic ester-acrylic ester-methacrylic ester block copolymer which requires hardly any purification, which is excellent in heat resistance and weatherability, and in which the molecular weight and the molecular-weight distribution are controlled, and a methacrylic ester-acrylic ester-methacrylic ester block copolymer produced by the process.

The present invention has its object to provide a curable composition which has good curability and adhesiveness while containing an organotin-free catalyst. The present invention provides a one package curable composition which comprises (A) a polyoxyalkylene polymer having a silicon-containing group capable of crosslinking by forming a siloxane bond, (B) a (meth)acrylic ester polymer having a silicon-containing group capable of crosslinking by forming a siloxane bond and compatible with the component (A), and (C) (c1) a carboxylic acid of which the carbon atom adjacent to a carbonyl group is a quaternary carbon, and/or (c2) a metal carboxylate of which the carbon atom adjacent to a carbonyl group is a quaternary carbon.

A quantum dot film article includes a first barrier film, a second barrier film, and a quantum dot layer separating the first barrier from the second barrier film. The quantum dot layer includes quantum dots dispersed in a polymer material. The polymer material includes a methacrylate polymer, an epoxy polymer and a photoinitiator.

There is provided an elastomer composition for an impact modifier and a thermoplastic resin composition having improved impact resistance using the same. An elastomer composition comprises a block copolymer (a) containing a methacrylate polymer and a siloxane polymer, and a graft copolymer (b) containing a polymer component having a glass transition temperature of lower than 25° C. And the composition is mixed with a thermoplastic resin (c).

Toner particles and a dry-powder electrophoretic display employing such particles are disclosed herein. The toner particles adapted for a dry-powder electrophoretic display comprise emulsion/aggregation particles having a negative charge. At least a portion of the toner particles include a surface coating, comprising a methacrylate polymer, disposed on the surface of the toner particles to impart a positive charge to a set of toner particles. The emulsion/aggregation toner particles have a particle size generally less than about 10 micrometers that allows for improved image quality as compared to conventional toners utilized in dry-powder electrophoretic displays.

A new underlayer composition that exhibits high etch resistance and improved optical properties is disclosed. The underlayer composition comprises a vinyl or acrylate polymer, such as a methacrylate polymer, the polymer comprising at least one substituted or unsubstituted naphthalene or naphthol moiety, including mixtures thereof. Examples of the polymer of this invention include:

where each R₁ is independently selected from an organic moiety or a halogen; each A is independently a single bond or an organic moiety; R₂ is hydrogen or a methyl group; and each X, Y and Z is an integer of 0 to 7, and Y+Z is 7 or less. The organic moiety mentioned above may be a substituted or unsubstituted hydrocarbon selected from the group consisting of a linear or branched alkyl, halogenated linear or branched alkyl, aryl, halogenated aryl, cyclic alkyl, and halogenated cyclic alkyl, and any combination thereof. The compositions are suitable for use as a planarizing underlayer in a multilayer lithographic process, including a trilayer lithographic process.

The invention relates to an optical adhesive composition, an optical adhesive and an optical film, which do not require an aging treatment, can effectively prevent the occurring of light leak even during the exposure to environment change, and have excellent transparency. The invention provides an optical adhesive composition comprising (A) 100 parts by weight of (methyl) acrylic acid ester polymer whose weight average molecular weight is 200 thousand to 2.5 million, (B) 1 to 50 parts by weight of (methyl) acrylic acid ester polymer whose side chain has the reactivity of an ethylene double bond and whose weight average molecular weight is 30 thousand to 1.5 million, (C) 0.1 to 50 parts by weight of multifunctional (methyl) acrylic acid ester compound, (D) 0.01 to 10 parts by weight of photopolymerization initiator.

The invention relates to a hot sealing system comprised of an olefin polymer or of an olefin polymer A, of a methacrylate polymer B, of a graft polymer A-X consisting of the above-mentioned constituents and of a solvent or solvent mixture. The hot sealing system is characterized by having a high thermal stability and short sealing times.

A thermoplastic polymer powder which (i) consists mainly of an acrylic block copolymer comprising one or more acrylic ester polymer blocks (A) and bonded thereto at least one polymer block selected among methacrylic ester polymer blocks (B) and acrylic ester polymer blocks (C) differing in structure from the blocks (A); (ii) has a complex dynamic viscosity η*(5) of 5.0×10³ Pa.s or lower as measured under the conditions of a temperature of 250° C. and an oscillation frequency of 5 rad/sec; (iii) has a Newtonian viscosity index n represented by the equation n=log η*(5)-log η*(50) [wherein η*(5) and η*(50) indicate the complex dynamic viscosities (unit, Pa.s) as measured under the conditions of a temperature of 250° C. and oscillation frequencies of 5 and 50 rad/sec, respectively] of 0.50 or smaller; and (iv) has an average particle diameter of 1 mm or smaller. The thermoplastic polymer powder is suitable for use in molding techniques employing a powder, such as slush molding and in powder coating. A molding, skin material, and the like which are excellent in weatherability, flexibility, mechanical strength, low-temperature properties, adhesion to polar resins, rubber elasticity, safety, etc. can be smoothly produced from the powder.

A resin composition for an optical material, which is excellent in heat resistance and transparency and is soluble in an aqueous alkali solution, a resin film for an optical material made of the resin composition, and an optical waveguide using the same are provided. The resin composition for an optical material includes: (A) an alkali-soluble (meth)acrylate polymer containing a maleimide skeleton in a main chain; (B) a polymerizable compound; and (C) a polymerization initiator. The resin film for an optical material is made of the resin composition for an optical material. The optical waveguide has a core part and/or a clad layer formed using the resin composition for an optical material or the resin film for an optical material.

The invention relates to a method for preparing polymer brush films with multiple stimulation responses by homogeneous phase atom transfer radical polymerization (ATRP). According to the method, the polymer brush films are N,N-diamido ethyl methacrylate polymers and have multiple stimulation responses on temperature, pH value, salt and a solvent. The homogeneous phase ATRP preparation method comprises the following steps of: synthesizing an initiator omega-(2-bromoisobutyramide)alkyl silane coupling agent; assembling the initiator on the clean surface of a substrate; and performing surface-initiated atom transfer radical polymerization in a homogeneous system. According to the method, the grafting density and film thickness of a polymer brush can be regulated and controlled by regulating the assembly density and the content of bulk phase monomers of the initiator on the surface of the substrate, so that the polymer brush films which have different structures and multiple stimulation responses can be obtained. The method is mild in reaction condition, easy to control, adjustable in grafting density, high in polymerization efficiency and wide in applicability.

The present invention provides a novel acrylic/modified silicone room temperature-curable resin composition that serves as a material for sealants having high modulus and high strength after curing, and a cured product thereof. The room temperature-curable composition includes: a (meth)acrylate ester polymer (A) having a specific silicon-containing functional group and having an alkyl (meth)acrylate ester monomer unit in its molecular chain; and a polyoxyalkylene polymer (B) having a specific silicon functional group.

The invention provides an adhesive sheet and a display which are not liable to be subjected to adverse influence of UV light and have excellent anti-foaming performance. The adhesive sheet (1) has an adhesive layer (11) which bonds a display forming component (21) to another display forming component (22), which have section difference at least on to-be-laminated sides. The adhesive layer (11) is composed of an adhesive that is formed by thremal-crosslinking an adhesive composition including (methyl)acrylate polymer (a), a thermal-crosslinker (b) and a ultraviolet absrober (c). The adhesive layer (11) is lower than 2% in haze and is lower than 1% in light transmittance under wavelength of 360 nm.

The invention discloses a manufacturing method of oil absorbing fiber felt, belonging to the technical field of manufacturing of fiber felts. By simultaneously adopting a semi-interpenetrating polymer network technique and an electrostatic spinning technique, the manufacturing method comprises the following steps: firstly, synthesizing monomers, which are unlikely to form cross-linked structures, to linear non-crosslinking methacrylate polymers by suspension polymerization; dissolving the polymers in a solvent suitable for electrostatic spinning to prepare liquor, and adding monomers, which are likely to form cross-linked structures and contain an initiator, into the liquor; preparing polymer liquor containing the semi-interpenetrating network structure by liquor polymerization; after insulating and defoaming, spraying the liquor to a receiving roller by an electrostatic spinning method; and along with volatilization of the solvent, after fibers are cured, fixing the semi-interpenetrating network structure inside the fibers so as to form the fiber felt with an intrinsic oil absorbing function. Compared with existing polypropylene fiber felt, the fiber felt disclosed by the invention has the advantages of higher adsorption rate, stronger oil keeping capacity and the like, and satisfies the industrial practical demands.

The present invention provides an adhesive composition, an adhesive and an optical film. An aging treatment period when the adhesive composition is prepared to the adhesive is not required, and performance change of the adhesive is prevented when the adhesive is exposed in a severe environment for a long time period. Furthermore the expansion of the substrate suitable for the adhesive can be restricted thereby preventing performance change. The adhesive composition provided by the invention can settle the problems and is characterized by comprising the components of (A), (B1) and (C); or the components of (A), (B2) and (C); or the components of (A), (B1), (B2) and (C), wherein each component is described as follows: (A) 100 by weight parts of (methyl)acrylate polymer with a weight average molecular ratio of 200 thousand to 2.5 million; (B1) 1-100 by weight parts of reactive (methyl)acrylate polymer which has a weight average molecular ratio of 30 thousand to 1.5 million and has ethylene double bonds at a side chain; (B2) 1-50 by weight parts of polyenic compound which has more than two ethylene double bonds in one module; and (C) 0.01-50 by weight parts of polythiol compound which has more than two sulfhydryl groups in one module.

A resin composition suitable for forming a film excellent in transparency, weatherability, hardness, shock resistance, bending-fracturing resistance, and moldability; and a film excellent in weatherability even when laminated on a molded body comprising a PVC resin composition containing a plasticizer is provided. The film having the above characteristics can be obtained by making a methacrylic resin composition into a film, the methacrylic resin composition comprising a methacrylic resin composition (C) obtained by polymerizing a methacrylate polymer (A) obtained by polymerizing a monomer mixture mainly composed of alkyl methacrylate in the presence of acrylic crosslinked elastic particles (B) obtained by copolymerizing a monomer mixture mainly composed of alkyl acrylate and a polyfunctional monomer with two or more non-conjugated double bonds per a molecule; and being copolymerized with 0.01 to 50 parts by weight of an ultraviolet absorber represented by the general formula (1).

The present invention provides an acidic aqueous polishing composition suitable for polishing a silicon nitride-containing substrate in a chemical-mechanical polishing (CMP) process. The composition, at point of use, preferably comprises about 0.01 to about 2 percent by weight of at least one particulate ceria abrasive, about 10 to about 1000 ppm of at least one non-polymeric unsaturated nitrogen heterocycle compound, 0 to about 1000 ppm of at least one cationic polymer, optionally, 0 to about 2000 ppm of at least one polyoxyalkylene polymer, and an aqueous carrier therefor. The cationic polymer preferably is selected from a poly(vinylpyridine) polymer, a quaternary ammonium-substituted acrylate polymer, a quaternary ammonium-substituted methacrylate polymer, or a combination thereof. Methods of polishing substrates and of selectively removing silicon nitride from a substrate in preference to removal of polysilicon using the compositions are also provided.

Method of bonding a layer (S) of silicone to a substrate (4′) of methacrylic polymer; the method involves positioning between the methacrylate polymer and the silicone a layer (9) of an organosilane having the formula R¹Si(R²)₃, in which R² is OH and R¹ is a methacrylic residue.

Novel tertiary (meth)acrylate compounds having a lactone structure are polymerizable into polymers having improved transparency, especially at the exposure wavelength of an excimer laser and dry etching resistance. Resist compositions comprising the polymers are sensitive to high-energy radiation, have a high resolution, and lend themselves to micropatterning with electron beams or deep-UV rays.