Abstract: Amphiphilic macromolecules having structural units to adjust molecular weight and molecular weight distribution and charging property effects, high stereo-hindrance structural units, and amphiphilic structural units, are suitable for fields such as oil field well drilling, well cementation fracturing, oil gathering and transfer, sewage treatment, sludge treatment and papermaking, etc., and can be used as an oil-displacing agent for enhanced oil production, a heavy oil viscosity reducer, a fracturing fluid, a clay stabilizing agent, a sewage treatment agent, a papermaking retention and drainage aid or a reinforcing agent, etc.

Abstract: The present invention relates to thickener polymers which comprise the following structural elements 1-3: a) as structural feature 1 at least one betainic monomer unit according to the formula below with a proportion by weight of from 0.1 to 99.9% by weight, based on the copolymer in which the mutually independent definitions are as follows: m=integer?1; R1?H, C1-3 alkyl, —COOH; R2?H, C1-3 alkyl; R3=n- or isoalkylene of the formula —(CxH2x)—, in which x is an integer from 1 to 30; R4=—H, cycloalkyl, n- or isoalkyl, aryl; R5=n- or isoalkylene of the formula —(CyH2y)—, in which y is an integer from 1 to 30; A=—S—, —O—, —NR2, in which R2?H, C1-3 alkyl; b) as structural feature 2 at least one anionically charged monomer unit according to the following formula with a proportion by weight of from 0.1 to 99.

Abstract: A heparin mimicking polymer, its conjugate with bFGF, and method of making and using the same are disclosed. In particular, described herein are conjugates of biologic agents (e.g., bFGF) and heparin mimicking polymers having superior stability while retaining full native activity after a variety of stressors.

Abstract: A process for obtaining random copolymers from itaconic acid and/or isomers and sodium alkenyl sulfonates is by polymerization in an aqueous solution via free radicals at an acidic pH in the range from 1.0 to 3.5 and with a redox system as initiator. The copolymers can be used as calcium carbonate and calcium, strontium and barium sulfates mineral scale inhibitors and as dispersants of clays, iron oxides, calcium carbonate and strontium, barium and calcium sulfates. Random copolymers prevent and control damage in an oil reservoir, obstruction of water injection and crude oil production pipelines, and in production rigs due to mineral scale precipitation caused by high levels of salinity of the injection water and formation water. Random copolymers are tolerant to high concentrations of divalent ions, such as calcium, magnesium, strontium and barium, and can be added to the reservoir and to injection or production pipelines, treated water, sea water and water that is used as means of transportation.

Abstract: A copolymer which includes at least one biologically compatible structural moiety and at least one biologically active moiety is disclosed. The copolymer can be used for fabricating a coating for an implantable medical device such as a stent.

Abstract: The invention relates to a superabsorbent copolymer comprising a reaction product of a reactive optical brightener comonomer. In another embodiment, the superabsorbent copolymer comprises a reaction product of a first monomer and a reactive optical brightener comonomer. The reactive optical brightener comonomer may be selected from various pyrene optical brighteners listed herein. The invention also relates to superabsorbent copolymer having from about 0.1 to 10,000 ppm of a reactive optical brightener comonomer based on the superabsorbent copolymer.

Abstract: A polymer formed by controlled radical polymerization includes groups that can be modified after controlled radical polymerization to form a radical. The polymer can be the reaction product of a controlled radical polymerization of radically polymerizable monomers, wherein at least one of the radically polymerizable monomers includes at least one group that can be modified after the controlled radical polymerization to form a radical.

Abstract: The present invention provides an amphiphilic macromolecule and the use thereof. The amphiphilic macromolecules have repeating structural units: structural units to adjust molecular weight and molecular weight distribution and charging property effects, high stereo-hindrance structural units, and amphiphilic structural units, which are suitable for fields such as oil field well drilling, well cementation, fracturing, oil gathering and transfer, sewage treatment, sludge treatment and papermaking, etc., and can be used as an oil-displacing agent for enhanced oil production, a heavy oil viscosity reducer, a fracturing fluid, a clay stabilizing agent, a sewage treatment agent, a papermaking retention and drainage aid or a reinforcing agent, etc.

Abstract: Water-soluble, hydrophobically associating copolymers which comprise new types of hydrophobically associating monomers. The monomers comprise an ethylenically unsaturated group and a polyether group with block structure comprising a hydrophilic polyalkylene oxide block which consists essentially of ethylene oxide groups, and a terminal, hydrophobic polyalkylene oxide block which consists of alkylene oxides with at least 4, preferably at least 5 carbon atoms.

Abstract: An object of the invention is to provide an electrode material slurry for preparation of lithium-ion secondary batteries favorable in properties and superior in storage stability and an aqueous binder composition for lithium-ion secondary batteries that can be used for production of lithium-ion secondary batteries superior in discharge rate characteristics and cycle characteristics. Provided is a binder composition for lithium-ion secondary battery electrode, comprising polymer particles containing (a) an ethylenic unsaturated carboxylic ester compound and (b) an ethylenic unsaturated sulfonic acid compound at a (a)/(b) mass ratio of (98 to 91)/(2 to 9) in a total (a) and (b) amount of 70 mass % or more, based on the monomeric raw materials.

Abstract: A water-dispersible, cyclocarbonate-functionalized vinyl copolymer binder, a process for the preparation of the binder, an aqueous dispersion containing the binder, a system comprising the binder, water and an (amine) curing agent and the use of the binder for the production of a hardened coating are proposed. It was surprisingly found that this binder, in which the emulsifier groups according to the invention are incorporated in the polymer chain, gives stable aqueous dispersions having a solids content of up to a 30% by weight.

Abstract: Presently described are curable dental compositions comprising a polymerizable ionic liquid. The polymerizable ionic liquid comprises one or more ethylenically unsaturated (e.g. free-radically polymerizable) groups. Various embodiments of curable dental compositions are described. In some embodiments, the polymerizable ionic liquid is a monofunctional polymerizable ionic liquid comprising an ethylenically unsaturated group. In other embodiments, the polymerizable ionic liquid is a multifunctional polymerizable ionic liquid comprising at least two ethylenically unsaturated groups. The curable dental compositions describe herein can be utilized as dental primers, dental adhesives, dental sealants, and dental composites. In many embodiments, the curable dental compositions further comprise an initiator such as a photoinitiator.

Abstract: Disclosed is a dispersing agent to be used for dispersing metal particles, comprising a structural unit originating from a compound represented by a general formula of wherein R1 is a hydrogen atom or a methyl group, R2 is a hydrogen atom, an alkyl group with a carbon number equal to or greater than 1 and equal to or less than 9, a phenyl group, a bicyclopentenyl group, or a nonylphenyl group, x is 2 or 3, and n is equal to or greater than 1, and a structural unit that has an ionic group, wherein a number average molecular weight of the compound represented by general formula (I) is equal to or less than 10000.

Abstract: The present disclosure relates to compositions comprising a copolymer that includes a first monomer and a second monomer that is different from the first monomer, wherein both the first and second monomer are selected from the group consisting of 3-sulfopropyl acrylate potassium salt, sodium acrylate, N-(tris(hydroxyl methyl)methyl)acrylamide, and 2-acrylamideo-2-methyl-1-propane sulfonic acid. The present disclosure further relates to methods for preparing the copolymer compositions and shaped articles comprising the copolymers.

Abstract: The invention relates to novel cross-linkable monomers that may be polymerized with ethylenically unsaturated comonomers to form cross-linkable copolymers. Said copolymers may particularly be used in the form of aqueous dispersions as formaldehyde-free adhesives or as coatings with good water resistance.

Abstract: Presently described are curable compositions comprising a mixture of at least one (e.g. free-radically) polymerizable ionic liquid and at least one other ethylenically unsaturated monomer, oligomer, or polymer. The polymerizable ionic liquid is characterized as having an air to nitrogen curing exotherm ratio of at least 0.70. Also described are articles and methods of making articles from such curable compositions. A monofunctional polymerizable ionic liquid is also described comprising a non-polymerizable substituted imidazolium cationic group and a polymerizable sulfonate anion.

Abstract: The present invention provides a carboxyl group-containing polymer composition that exhibits excellent anti-soil redeposition ability in fabric washing. The carboxyl group-containing polymer composition contains a carboxyl group-containing polymer, which includes specific ratios of a structure unit (a) derived from an acrylic acid-based monomer (A) and a structure unit (b) derived from a sulfonic acid group-containing monomer (B) and has a specific weight average molecular weight, and a specific amount of an adduct of a hydrogen sulfite to the acrylic acid-based monomer (A).

Abstract: A method of manufacturing polymer hydrogel for an osmosis solute may include cross-linking polymerizing a zwitterionic monomer (including an anionic group and a cationic group) and a temperature-sensitive monomer. Example embodiments also relate to a draw solute for forward osmosis including polymer hydrogel manufactured according to the method, and a forward osmosis water treatment device and method using the forward osmosis draw solute.

Abstract: An actinic ray-sensitive or radiation-sensitive resin composition includes: (P) a resin that contains (A) a repeating unit capable of decomposing upon irradiation with an actinic ray or radiation to generate an acid in a side chain of the resin (P) and (C) a repeating unit represented by the following formula (I) as defined in the specification, wherein a polydispersity of the resin (P) is 1.20 or less.

Abstract: A resist composition containing a base component (A) which generates acid upon exposure, and exhibits changed solubility in a developing solution under the action of acid, wherein the base component (A) contains a polymeric compound (A1) having a structural unit (a5) represented by general formula (a5-0) shown below and a structural unit (a6) that generates acid upon exposure. In the formula, R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms, R1 represents a sulfur atom or an oxygen atom, R2 represents a single bond or a divalent linking group, and Y represents a hydrocarbon group in which a carbon atom or a hydrogen atom may be substituted with a substituent.

Abstract: Provided is an electronic microparticle, including a first copolymer copolymerized from a first monomer and a second monomer or a second copolymer copolymerized from the first monomer, the second monomer and a third monomer. The first monomer includes an alkenyl group and excludes a sulfonic group, a carboxylic group, a hydroxyl group and an amino group. The second monomer includes an alkenyl group and further includes a sulfonic group or a carboxylic group. The third monomer includes an alkenyl group and further includes a hydroxyl group or an amino group. Either the first monomer or the second monomer has a ratio of the repeating units of the first monomer to the repeating units of the second monomer between about 200:1 and 20:1. In addition, an addition agent and a filtering membrane which include the electronic microparticle illustrated above are provided.

Abstract: The present invention provides a polymer compound represented by the following Formula (1) and a method for production thereof, a pigment dispersant, a pigment dispersion composition, and a photocurable composition respectively using the polymer compound, and a color filter and a method for production thereof [R1: an organic linking group having a valency of (m+n); R2: a single bond or a divalent organic linking group; A1: a monovalent organic group containing at least one moiety selected from an organic dye structure, a heterocyclic structure, an acidic group, a group having a basic nitrogen atom, a urea group, a urethane group, a group having a coordinating oxygen atom, a hydrocarbon group having 4 or more carbon atoms, an alkoxysilyl group, an epoxy group, an isocyanate group, and a hydroxyl group; m=1 to 8, n=2 to 9 (m+n=3 to 10); and P1: polymer skeleton].

Abstract: An additive for lead-acid battery including sulfonated polyacrylic acid aimed at extending the battery life by preventing the sulfation of the negative electrode, and a lead-acid battery using the additive.

Abstract: A multifunctional polymerizable ionic liquid is described comprising an anion and a cationic group having at least two ethylenically unsaturated polymerizable groups, each bonded to the cationic group via a divalent non-alkyl linking group. The multifunctional linking groups independently comprise a heteroatom such as oxygen or nitrogen. The linking groups may independently comprise one or more linkages such as an amide, urea, or ether linkage and more typically a urethane or ester linkage. The ethylenically unsaturated polymerizable groups are typically (meth)acrylate groups. Coatings and coated articles are also described.

Abstract: A positive resist composition including a base component (A) which exhibits increased solubility in an alkali developing solution under action of acid and an acid-generator component (B) which generates acid upon exposure, the base component (A) including a polymeric compound (A1) containing a structural unit (a0) represented by general formula (a0-1) shown below and a structural unit (a1) derived from an acrylate ester containing an acid dissociable, dissolution inhibiting group.

Abstract: The invention relates to water-soluble or water-swellable polymers the repeating structural units of which consist of a) 90.0 to 99.99 mole-% of one or more repeating structural units originating from special monomers with sulfonic acid groups or the salts thereof such as for example 2-acrylamido-2-methyl-propanesulfonic acid or the salts thereof and b) 0.01 to 10.0 mole-% of one or more repeating structural units originating from special cross-linking agents with at least three polymerizable double bonds. The polymers for example have an advantageous sensory property profile and are highly suitable as thickening agents even in salt-containing compositions. They are furthermore advantageously suitable for producing cosmetic, dermatological or pharmaceutical compositions.

Abstract: The invention relates to novel cross-linkable monomers that may be polymerized with ethylenically unsaturated comonomers to form cross-linkable copolymers. Said copolymers may particularly be used in the form of aqueous dispersions as formaldehyde-free adhesives or as coatings with good water resistance.

Abstract: This invention relates to a rubbery or elastomeric polymer material taking up more than 5% by weight of water and at most 500% by weight of water after immersion in demineralized water at room temperature for a sufficient time to reach saturation, comprising: (a) repeating units from one or more hydrophobic organic monomers, and (b) repeating units from one or more monomers (a) being modified with one or more hydrophilic side groups. The rubbery or elastomeric polymer material may be in the form of a sheet, a foam, a coating adapted for adhesion to a substrate, or a fiber. This invention also relates to processes, polymerizable compositions, and foaming compositions for producing such rubbery or elastomeric polymer materials.

Abstract: A composition for forming an upper layer film includes a solvent and a resin component including a first resin having a first repeating unit and a second repeating unit. The first repeating unit is a repeating unit represented by a formula (1-1), a repeating unit represented by a formula (1-2), a repeating unit represented by a formula (1-3), or a combination thereof. The second repeating unit is a repeating unit represented by a formula (2-1), a repeating unit represented by a formula (2-2), or both thereof. The composition is to be used for forming the upper layer film in liquid immersion lithography.

Abstract: A composition for forming a liquid immersion upper layer film includes a polymer component including a polymer having a structural unit represented by a formula (1); and a solvent. R1 represents a carboxy group or a group represented by a formula (2); X represents a single bond, a divalent hydrocarbon group having 1 to 20 carbon atoms or a divalent fluorinated hydrocarbon group having 1 to 20 carbon atoms; R2 represents a hydrocarbon group having 1 to 20 carbon atoms and a valency of (n+1), a fluorinated hydrocarbon group having 1 to 20 carbon atoms and a valency of (n+1), or one of these groups each including between adjacent two carbon atoms thereof —CO—, —COO—, —O—, —NR?—, —CS—, —S—, —SO—, —SO2— or a combination thereof; and R3 represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms.

Abstract: The present invention relates to polyvinyl sulfonic acid comprising a vinyl sulfonic acid unit represented by a specific general formula (1), wherein the molar amount of sulfonic acid groups derived from vinyl sulfonic acid monomers with respect to the molar amount of total monomer units is 50.0 to 98.0 mol %, and the polyvinyl sulfonic acid has an absorbance of 0.1 or greater (aqueous solution: 0.2 mass %, cell length: 10 mm) in a wavelength range of 255 to 800 nm.

Abstract: The invention relates to water-soluble or water-swellable polymers that contain a) 20.0 to 98.97 mole-% of one or more repeating structural units originating from special monomers with sulfonic acid groups or the salts thereof such as e.g. 2-acrylamido-2-methyl-propanesulfonic acid or the salts thereof, b) 1.0 to 60.0 mole-% of one or more repeating structural units containing an amide group and d) 0.01 to 8.0 mole-% of one or more repeating structural units originating from special crosslinking agents with at least three polymerizable double bonds. The polymers for example have an advantageous sensory property profile and are highly suitable as thickening agents even in salt-containing compositions. They are furthermore advantageously suitable for producing cosmetic, dermatological or pharmaceutical compositions.

Abstract: The present invention relates to a method for the continuous production of a polymer by radical polymerization, wherein at least three materials are mixed with microstructures in one or more mixers and are then polymerized in at least one reaction zone.

Abstract: The invention pertains to the field of membrane protein immobilization onto supports. It relates to a product comprising a support and at least one membrane protein attached to the surface thereof, characterized in that said membrane protein is attached to said support using an amphiphilic molecule with which said membrane protein is complexed. It also relates to a process for preparing such product, as well as to various applications in the fields of diagnosis, drug design and biotechnologies. It further relates to a kit, together with a functionalized amphiphilic molecule, for preparing a product according to the invention comprising a support and an amphiphilic molecule, wherein the amphiphilic molecule and the support interact through a hydrophobic bond, an ionic bond, a specific bond or a covalent bond.

Abstract: The present invention is directed to a network composition having the reaction product of: (i) at least one anionic polymerizable ethylenically unsaturated monomer (I) selected from the group consisting of [CH2?C(R3)C(O)OXa(C2H4O)b(C3H6O)c(C4H8O)d]pP(O)(OY)q(OZ)r where R3?H or alkyl of 1 to about 6 carbon atoms; X=alkyl, aryl, or alkaryl diradical connecting group of 0 to about 9 carbon atoms; a is 0 to about 100; b is 0 to about 100; c is 0 to about 100; d is 0 to about 100; q is 0 to about 2; r is 0 to about 2; p is 1 to about 3 subject to the limitation that p+q+r=3; and Y and Z is H, or metal ion; and CH2?C(R3)C(O)OXa?(C2H4O)b?(C3H6O)c?(C4H8O)d?—SO3—Y) where R3?H or alkyl of from 1 to about 6 carbon atoms; X=alkyl, aryl, or alkaryl diradical connecting group of 0 to about 9 carbon atoms; a? is 0 to about 100; b? is 0 to about 100; c? is 0 to about 100; d? is 0 to about 100; Y is H, or metal ion; and (ii) one or more additional monomers (II) selected from the group consisting of acrylic acid/acry

Abstract: The present invention provides a carboxyl group-containing polymer composition that exhibits excellent anti-soil redeposition ability in fabric washing. The carboxyl group-containing polymer composition contains a carboxyl group-containing polymer, which includes specific ratios of a structure unit (a) derived from an acrylic acid-based monomer (A) and a structure unit (b) derived from a sulfonic acid group-containing monomer (B) and has a specific weight average molecular weight, and a specific amount of an adduct of a hydrogen sulfite to the acrylic acid-based monomer (A).

Abstract: Polymerized micelles comprising polymerized amphiphilic molecules obtained starting from amphiphilic molecules having one or two lipid chains each comprising one or two polymerizable moieties and linked to a polar head.

Abstract: To provide an electrolyte polymer for polymer electrolyte fuel cells, made of a perfluorinated polymer having sulfonic groups, characterized in that in a test of immersing 0.1 g of the polymer in 50 g of a fenton reagent solution containing 3% of an aqueous hydrogen peroxide solution and 200 ppm of bivalent iron ions at 40° C. for 16 hours, the amount of eluted fluorine ions detected in the solution is not more than 0.002% of the total amount of fluorine in the polymer immersed. The electrolyte polymer of the present invention has very few unstable terminal groups and has an excellent durability, and therefore, is suitable as a polymer constituting an electrolyte membrane for polymer electrolyte fuel cells and a polymer contained in a catalyst layer.

Abstract: A positive resist composition comprises a polymer having a carboxyl group substituted with an acid labile group having formula (1) wherein R1 and R2 are alkyl or alkenyl, R3 and R4 are a single bond, methylene, ethylene or propylene, R5 and R6 are hydrogen or alkyl. The composition has a high dissolution contrast, high resolution, and suppressed acid diffusion rate, and forms a pattern of good profile and minimal edge roughness.

Abstract: The invention relates to a copolymerizable emulsifier comprising (meth)acrylic acid esters, selected from compounds of the general formula (1) and (II), where: A is an acrylic group having 3 to 40 carbon atoms, x and y independently of each other are a hydrogen group or a methyl group, B is hydrogen or a sulfate or phosphate group, and n a number in the range of 0 to 40. The invention further relates to methods of using said copolymerizable emulsifier in the emulsion polymerization of olefinically unsaturated monomers to prepare polymers.

Abstract: The invention relates to a copolymer including betaininc units and hydrophobic and/or amphiphile units. The invention also relates to a method for preparing a copolymer including betaininc units and hydrophobic and/or amphiphile units, by controlled micellar polymerisation. The invention further relates to the uses of the copolymer. The copolymer is particularly used for increasing the viscosity of saline aqueous compositions.

Abstract: An aspect of the present invention relates to a radiation-curable vinyl chloride copolymer, which comprises a structural unit denoted by general formula (1): wherein, in general formula (1), R1 denotes a hydrogen atom or a methyl group, and L1 denotes a divalent linking group denoted by formula (2), formula (3), or general formula (4): wherein, in general formula (4), R41 denotes a hydrogen atom or a methyl group.

Abstract: A radiation-sensitive resin composition includes a solvent and a polymer. The polymer includes a repeating unit represented by a formula (I), a repeating unit represented by a formula (II), or a both thereof. Each of R1 to R3 independently represents a hydroxyl group, or the like. At least one of R1 represents a group having two or more heteroatoms. l is an integer from 1 to 5. Each of m and n is independently an integer from 0 to 5. Each of R7 and R11 independently represents a hydrogen atom, or the like. Each of R8 to R10 independently represents a hydrogen atom, or the like. A represents —O—, or the like. D represents a substituted or unsubstituted methylene group, or the like.

Abstract: The current invention relates to families of scale-inhibitors having different UV/VIS absorption profiles and their application in a method for stimulating an oilfield comprising those families.

Abstract: Polymers are described comprising a) one or more of the recurring structural units of the formula (1) where R1 is hydrogen, methyl or ethyl and A is C1-C8 alkylene, and Q+ is H+, NH4+, Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++ or ? Al+++, and the neutralization degree of the structural units of formula (1) is 50 to 100 mol-%, and b) one or more of the recurring structural units of the formula (2) where R1 and A are R1 and A from formula (1) and X+ is [HNR5R6R7]+, where R5, R6 and R7 can independently from each other be hydrogen, a linear or branched alkyl group with 1 to 22 carbon atoms, a linear or branched, simple or polyunsaturated alkenylene group with 2 to 22 carbon atoms, a C6-C22-alkylamidopropyl group, a linear monohydroxyalkyl group with 2 to 10 carbon atoms or a linear or branched dihydroxyalkyl group with 3 to 10 carbon atoms, and wherein at least one of the groups R5, R6 and R7 is not hydrogen.

Abstract: A single layer film containing at least one anionic hydrophilic group selected from a sulfonic acid group, a carboxyl group and a phosphate group, wherein an anion concentration ratio (Sa/Da) of an anion concentration at a surface (Sa) to an anion concentration at a deep part (Da) is 1.1 or more. The single layer film is a copolymer prepared by polymerizing a composition containing a compound (I) represented by the general formula (1) ([X]s[M1]l[M2]m (1)) and a compound (II) having two or more (meth)acryloyl groups in a molecule at a molar ratio of 15:1 to 1:30 and having a water contact angle of 30° or less. Such a single layer film has high hydrophilicity and surface hardness and is excellent in antifogging property, antifouling property and antistatic property, thus is useful as an antifogging material, an antifouling material, an antistatic material and a multilayer body.

Abstract: A salt-tolerant, thermally-stable rheology modifier and, in particular, a rheology modifier for applications in oil-field well-bore fluids. In accordance with one aspect, the rheology modifier comprises a terpolymer of acrylamide, 2-acrylamido-2-methyl-propanesulfonic acid (AMPS) and a long-chain alkyl acrylate wherein the terpolymer is prepared by dispersion polymerization.

Abstract: Gypsum wallboard can be made lighter and less dense, without sacrificing strength, by adding to the gypsum slurry used in making the board a styrene butadiene polymer latex substantially stable against divalent ions in which the styrene butadiene polymer includes at least 0.25 wt. % of an ionic monomer.

Abstract: A resin composition for forming a top coat which can be formed on a photoresist film without causing intermixing with the photoresist film, can maintain a stable film coating which is not eluted into a medium during immersion lithography, does not impair pattern profiles during dry exposure (which is not immersion lithography), and can be easily dissolved in an alkaline developer. The resin is a copolymer which includes at least one recurring unit (I) selected from the group consisting of a recurring unit having a group shown by the following formula (1), a recurring unit having a group shown by the following formula (2), and a recurring unit having a carboxyl group, and a recurring unit (II) having a sulfo group, the copolymer having a weight average molecular weight determined by gel permeation chromatography of 2,000 to 100,000.

Abstract: A polymer for use in resist compositions is obtained from a monomer having formula (1) wherein R1 is methyl, ethyl, propyl, vinyl or ethynyl, the circle designates C3-C12 cycloalkyl, a combination wherein R1 is ethyl and the circle is cyclohexyl being excluded, R2 is H or C1-C4 alkyl, and m is 1 to 4.