275 results about "Alkyl methacrylate" patented technology

The purposes of the present invention is: to provide an adhesive composition which has excellent adhesive force and holding properties in addition to excellent low dielectric properties; to provide an adhesive tape which has an adhesive layer that contains the adhesive composition; to provide a resin molded body which is molded from a resin composition that comprises the adhesive composition; to provide a composite structure which comprises the adhesive tape; to provide an automobile member which comprises the resin molded body or the composite structure; and to provide a method for producing a resin molded body using the composite structure.　The present invention provides an adhesive composition which contains: an acrylic copolymer that has a constituent unit derived from a (meth)acrylic acid alkyl ester, a constituent unit derived from an olefin-based polymer that has a polymerizable unsaturated double bond at an end thereof, and a constituent unit derived from a polar functional group-containing monomer; and a styrene-based elastomer that contains at least one substance selected from the group consisting of a block copolymer which has a block derived from a styrene-based monomer and a block derived from a conjugated diene-based monomer, and a hydrogenated product of the block copolymer.

A submarine cable core comprising a conductor which is surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer in that order; wherein said insulation layer comprises: a low density polyethylene homopolymer or low density polyethylene copolymer with at least one polyunsaturated comonomer and optionally one or more further comonomers; and, a copolymer comprising at least one polar comonomer selected from the group consisting of an alkyl acrylate, an alkyl methacrylate or vinyl acetate, wherein the amount of polar monomer units in the insulation layer is from 1 to 150 micromol per gram based on the total amount of polymer components in the insulation layer.

Provided is an adhesive composition from which an adhesive layer having excellent heat-resistant durability can be formed. This adhesive composition comprises a (meth)acrylic resin, a crosslinking agent, a silane compound, and an ionic compound, wherein: the (meth)acrylic resin contains, as monomer units, an alkyl (meth)acrylate having a homopolymer glass transition temperature of lower than 0ºC, an alkyl (meth)acrylate having a homopolymer glass transition temperature of at least 0ºC, and a monomer having a polar group; and the ionic compound contains a cyano group-containing anion.

The invention relates to a recyclable easily-degradable macromolecular surfactant for cleaning oily sludge and application of the recyclable easily-degradable macromolecular surfactant. The macromolecular surfactant is prepared by taking acrylamide, methacrylic acid long-chain alkyl ester and tertiary amino substituted methacrylate as raw materials through free radical polymerization. The macromolecular surfactant is dissolved in water to prepare a cleaning solution, and oily sludge can be efficiently eluted. CO2 and N2 are sequentially introduced into the oil-containing emulsion after the oil-containing sludge is cleaned, or diluted hydrochloric acid and a diluted alkali aqueous solution are sequentially added, the hydrophilic-hydrophobic property of the macromolecular surfactant is changed through pH regulation and control, separation of the macromolecular surfactant and an oil phase is achieved, petroleum resources are recycled, and recycling of the cleaning solution containing the macromolecular surfactant is achieved. The residual macromolecular surfactant in the cleaned deoiled sludge can be degraded under the action of environmental microorganisms.

The invention discloses a polymeric dispersant, a preparation method, a pigment paste and a photocuring composition, the polymeric dispersant is characterized in that the polymeric dispersant is a terpolymer formed by controllable free radical polymerization of a structural unit A, a structural unit B and a structural unit C. The structural unit A is derived from alkyl (meth) acrylate; the structural unit B is derived from polyethylene glycol (methyl) acrylate; and the structural unit C is derived from an N-acryloyl carbazole monomer. The polymeric dispersant aims to overcome the defect that the flexibility of the anchoring group connection mode in the existing carbazole dispersant is too large, and the N-acryloyl carbazole monomer with an optimized structure and a ternary polymerization framework are adopted to realize more efficient and lasting anchoring with the pigment surface, so that the flocculation problem is solved, and the super-stable dispersion is realized.

Provided is a graft copolymer in which a (meth)acrylic acid ester-based polymer block (A) having a reactive silicon group and a polyoxyalkylene-based polymer block (B) having a number average molecular weight of 1,000 or more are bonded in the order of A-B-A. The content of (A) is 35-70 wt. % and the content of (B) is 30-65 wt. %. The (A) contains a structural unit derived from a (meth)acrylic acid ester (a1) and a structural unit derived from a chain transfer agent (a2) having a mercapto group. The content of the alkyl (meth) acrylate ester having an alkyl group with 7 or more carbon atoms is 7 wt. % or less in the graft copolymer. The sulfur atom concentration derived from (a2) is 4,500-10,000 ppm in the graft copolymer.

The invention relates to a thermoplastic molding composition (P) comprising: (A) thermoplastic polymer composition (A) comprising: (A-1) 10 to 50 wt.-% of graft copolymer (A-1), (A-2) 1 to 50 wt.-%, of thermoplastic polymer matrix (A-2) based on one or more vinylaromatic copolymers, (A-3) 20 to 50 wt.-%, of polymerized alkyl methacrylate component (A-3), and (A-4) 0 to 45 wt.-% of comonomer which is copolymerized with the at least one polymerized alkyl methacrylate component (A-3), where the sum of (A-1), (A-2), (A-3) and optional comonomers (A-4) is 83.2 to 99.8 wt.-%; (B) a hindered amine light stabilizer composition (B), comprising at least two of substances (B-1) to (B-3): (B-1) 0 to 0.9 wt.-%, of at least one hindered amine light stabilizer having a dipiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the dipiperidine structure (B-2) 0 to 0.9 wt.-%, of a hindered amine light stabilizer mixture having a monopiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the monopiperidine structure, and (B-3) 0 to 2 wt.-%, of at least one hindered amine light stabilizer having a polymeric structure comprising piperidine groups with at least one alkyl group at each of the 2 and 6 positions of the piperidine groups (C) 0 to 5 wt.-%, of one or more further additives (C), different from (B); and (D) 0 to 10 wt.-%, of colorants, dyes and / or pigments (D), different from (C); wherein the constituents (A) to (D) sum up to 100 wt.-% of the molding composition (P).

An acrylic rubber composition includes an acrylic rubber and a specific antioxidant, wherein the acrylic rubber includes 15 to 55% by weight of methacrylic acid alkyl ester monomer units (a), 44.5 to 84.5% by weight of acrylic acid ester monomer units (b), and 0.5 to 4% by weight of carboxyl group-containing monomer units (c), and the content of the antioxidant is 0.1 to 5 parts by weight relative to 100 parts by weight of the acrylic rubber.

The invention belongs to the technical field of oily sludge cleaning, and particularly relates to a macromolecular / micromolecular composite surfactant for intensively cleaning oily sludge. A main monomer (such as acrylamide), a hydrophilic monomer (such as 2-acrylamido-2-methylpropanesulfonic acid) and a hydrophobic monomer (such as methacrylic acid long-chain alkyl ester) are mixed, and the macromolecular surfactant is synthesized through free radical polymerization. The specific long-chain structure of the macromolecular surfactant can form larger micelles, colloid and asphaltene can be effectively wrapped, the macromolecular surfactant is compounded with the micromolecular surfactant for use, and mixed micelles with higher solubilizing capacity can be formed, so that the colloid and asphaltene in the high-medium-concentration oily sludge can be efficiently removed, and the high-medium-concentration oily sludge can be effectively removed. Further, the removal rate of total petroleum hydrocarbon is improved. The invention provides a new technology for high-efficiency deep treatment of high-medium-concentration oily sludge.

The invention belongs to the technical field of pharmaceutical preparations, and particularly relates to a tiopronin-containing composition as well as a preparation method and application thereof. The preparation method comprises the following steps: granulating by adopting isopropanol as a granulating solution, drying and tabletting to obtain a tablet core with extremely low water content, and meanwhile, dissolving a mixture of an amine alkyl methacrylate copolymer and hydroxypropylcellulose in isopropanol as an isolating layer solution to coat the tablet core, so that the stability of the tablet core is improved; and finally, calcium carbonate, cane sugar and the like are adopted for sugar coating, so that unpleasant odor is effectively covered, the compliance of a patient is improved, the preparation is suitable for large-scale production, the medicine taking convenience and the medicine administration safety of the patient are improved, and therefore, the preparation has a good practical application value.

The composition includes an acrylic monomer having a carboxylic acid group, an acrylic monomer having a hydroxyl group, at least one of an alkyl acrylate or alkyl methacrylate, and from 15 to 22 percent by weight of a compound composed of divalent segments L and at least two X groups. The divalent segments L are represented by formula L. Each segment L is independently directly bonded to two secondary N atoms, two tertiary N atoms, or a secondary and a tertiary N atom. Each R1 represents an alkylene group having from 1 to 4 carbon atoms, and at least some of the R1 groups are —CH2—CH2—CH2—CH2—. Each X group is independently represented by the formula CH2═C(R)—C(O)—O—V—W—C(O)—. Articles and methods using the composition are also described.

Provided is a graft copolymer in which a (meth)acrylic acid ester-based polymer block (A) that has a reactive silicon group and a hydrocarbon-based polymer block (B) are bonded in the order of A-B-A. The content of (meth)acrylic acid alkyl esters in which an alkyl has 4 or more carbon atoms is preferably not less than 10 wt% in the graft copolymer. The (meth)acrylic acid ester-based polymer block (A) includes a structural unit derived from a chain transfer agent (a2) having a mercapto group, and the molar ratio of the hydrocarbon-based polymer block (B) to the chain transfer agent (a2) having a mercapto group is preferably not less than 0.06.

The invention provides a bifunctional ionic liquid monomer, an ionic multifunctional viscosity index improver as well as a preparation method and application of the ionic multifunctional viscosity index improver, and belongs to the technical field of lubricating additives. A series of bifunctional ionic liquid monomers are synthesized through molecular design and have the functions of antifriction, wear resistance and cross-linking agents, then the monomers are copolymerized with long-chain alkyl methacrylate, and the ionic multifunctional viscosity index improver is prepared. The molecular structure of the viscosity index agent simultaneously contains an oleophylic alkyl chain, a rigid benzene ring structure and an ionic functional group, so that the solubility, the viscosity increasing performance and the viscosity-temperature performance of the viscosity index agent in base oil are remarkably improved; a biquaternary ammonium salt structure is introduced into a main chain to realize crosslinking of the polyion liquid, so that the tackifying performance of the polyion liquid is improved, phosphorus, sulfur and nitrogen heteroatoms are introduced, physical and chemical adsorption films can be formed on the metal surface, the friction coefficient and the abrasion volume are effectively reduced in the friction process, and the boundary lubricating performance is enhanced.

In some embodiments, the curable composition comprises: at least one high Tg alkyl (meth) acrylate, the high Tg alkyl (meth) acrylate being free of polar 5 groups and having a homopolymer Tg of at least 60 DEG C; at least one low Tg alkyl (meth) acrylate free of polar groups and having a homopolymer Tg of less than-30 DEG C; at least one crosslinking agent; and at least one photoinitiator. The curable composition is solvent-free and inkjet printable, has a viscosity of less than 25 centipoise at room temperature, and when cured to form a 100 [mu] m thick coating, has a Tg of at least 50 DEG C as measured by DMA (Dynamic Mechanical Analysis), an adhesion to glass of less than 20 g / inch (7.7 N / m) as measured by 180 DEG peel adhesion, a Young's modulus of greater than 0.5 GPa, and is optically transparent.

The present invention provides a thermoplastic resin composition including a first graft copolymer including a conjugated diene-based polymer, an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyanide-based monomer; a second graft copolymer including an alkyl (meth)acrylate-based polymer, an aromatic vinyl-based monomer, a vinyl cyanide-based monomer, and an alkyl (meth)acrylate-based monomer; and a thermoplastic copolymer including an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyanide-based monomer, wherein the first graft copolymer is included in an amount of 5 to 12% by weight, and the weight of the first graft copolymer is less than the weight of the second graft copolymer and at the same time less than the weight of the thermoplastic copolymer, and a molded article manufactured using the thermoplastic resin composition.

The invention relates to a process for the preparation of methacrylic acid by reacting C1-C3-alkyl methacrylate with water. In the process, the reaction mixture obtained in the reaction is separated in a first rectification column (A) and the resulting overhead stream (12) is separated by means of a phase separator (a) to obtain an organic phase (5) and an aqueous phase (4). The resulting bottom stream (6) is separated in a second rectification column (C) to obtain an overhead stream (9) containing methacrylic acid.

To provide an antifouling coating composition capable of forming a coating film that combines bioresistance and contamination resistance without relying on photocatalytic semiconductor materials.SOLUTION: There is provided an antifouling coating composition containing resin (A) having a weight-average molecular weight of 10,000 or more and 200,000 or less, which comprises units derived from monomer (a1), units derived from monomer (a2), and units derived from monomer (a3). The monomer (a1) is one or more selected from the group consisting of alkyl acrylate and alkyl methacrylate, the monomer (a2) is an ethylene-unsaturated monomer having one or more hydrophilic functional groups, and the monomer (a3) is a monomer having one or more alkoxysilyl groups.SELECTED DRAWING: None

A method for producing a (meth)acrylate monomer of a polyalkoxylated alcohol includes providing an unneutralized polyalkoxylated alcohol, wherein the unneutralized polyalkoxylated alcohol is produced by base catalyzed alkoxylation. An alkyl (meth)acrylate is transesterified with the unneutralized polyalkoxylated alcohol to produce the (meth)acrylate monomer of the polyalkoxylated alcohol. No transesterification catalyst is added during the step of transesterifying the alkyl (meth)acrylate with the unneutralized polyalkoxylated alcohol.

A process for the preparation of aryl vinyl sulfones includes reacting an aryl sulfonyl halide with a reaction solvent selected from the group consisting of (meth) acrylonitrile or alkyl (meth) acrylates in a first reaction mixture in the presence of a Cu (I) catalyst to form an intermediate product wherein the Cu (I) catalyst is not complexed. The unreacted reaction solvent is separated from the first reaction mixture to form a second mixture. A low polarity solvent is added to the second mixture to precipitate the Cu (I) catalyst and dissolve the intermediate product to form a third reaction mixture. A base is added to the third reaction mixture, wherein the intermediate product undergoes base-catalyzed elimination of halogen atoms from the intermediate product, preferably under cooling, to form the aryl vinyl sulfone compound. And separating the aryl vinyl sulfone compound from the third reaction mixture.

The invention belongs to the technical field of angiographic contrast agents, and particularly relates to an angiographic contrast agent for corpses and a preparation method of the angiographic contrast agent. The angiographic contrast agent for the corpse is prepared from the following components in parts by mass: 20 to 35 parts of iodine-containing polymer, 30 to 50 parts of iodo-benzene ring compound, 90 to 150 parts of glycerol triacetate, 30 to 40 parts of dimer acid and 600 to 800 parts of liquid paraffin, the iodine-containing polymer is obtained by copolymerizing (methyl) C4-6 alkyl acrylate, polyethylene glycol diacrylate and an iodine-containing monomer, and the iodine-containing monomer is selected from at least one of 3-iodine-ethyl acrylate, 3-iodine-methyl acrylate and (methyl) iodobenzyl acrylate. The blood vessel contrast agent disclosed by the invention can realize an excellent blood vessel contrast effect on a corpse, can also obtain a relatively ideal contrast effect for a corpse with relatively long death time, and provides powerful support for the corpse work.

A method of preparing a thermoplastic resin including kneading and extruding an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A), or an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) and a matrix resin (B) including one or more selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound, an alkyl methacrylate, and an alkyl acrylate. A total content of the alkyl acrylate included in the thermoplastic resin is 20 to 50% by weight. An alkyl acrylate coverage value (X) of the thermoplastic resin as calculated by Equation 1 (X={(G−Y) / Y}×100) is 65 or more. In Equation 1, G represents a total gel content (%) of the thermoplastic resin, and Y represents a content (% by weight) of the alkyl acrylate in the gel of the thermoplastic resin.

The present invention relates to a polymer dispersion and its use. The dispersion comprises polymer in particle form dispersed in an aqueous liquid phase. The polymer particles are obtained by a radical polymerisation of monomers in a presence of a dissolved rosin component, in an aqueous polymerisation medium comprising a polymeric stabilizer. The monomers comprise a first monomer (i) selected from alkyl (meth)acrylates and a charge-carrying second monomer (ii) having a cationic charge, when measured at pH 3, selected from ethylenically unsaturated tertiary amines.

Embodiments of the present disclosure relate to a composition comprising a hydrocarbon mixture having a paraffin wax and at least one reactive moiety, and an ethylene acrylate terpolymer having a moiety that reacts with the at least one reactive moiety in the hydrocarbon mixture. For this embodiment, the ethylene acrylate terpolymer is formed from (A) a first monomer of ethylene, (B) a second monomer selected from the group consisting of vinyl acetate, alkyl acrylates, alkyl (meth) acrylates, and combinations thereof, and (C) a third monomer having the portion that reacts with at least one reactive portion of the hydrocarbon mixture, the third monomer selected from the group consisting of maleic anhydride, maleic diester, glycidyl acrylate, glycidyl methacrylate, glycidyl vinyl ether, and combinations thereof.

To provide a film-shaped sintered material and a method for manufacturing a semiconductor device, which, even when a semiconductor wafer and the film-shaped sintered material are bonded together at room temperature, reduces chip flying when the semiconductor wafer is diced together with the film-shaped sintered material on a support sheet and has excellent pick-up suitability.SOLUTION: A film-shaped sintered material (1) contains sinterable metal particles (10) and a binder component (20), and the binder component (20) contains a copolymer of an alkyl methacrylate having 8 or less carbon atoms and an alkyl methacrylate having 9 to 13 carbon atoms.SELECTED DRAWING: Figure 1

There is provided an aqueous personal care rinse-off formulation, the aqueous personal care rinse-off formulation comprising: a dermatologically acceptable vehicle; a dermatologically acceptable cleansing surfactant; and a gradient polymer comprising: 5%-35% by weight of structural units of (meth) acrylic acid; 35 wt% to 65 wt% of a structural unit of C1-8 alkyl (meth) acrylate; gt; 10% to 30% by weight of structural units of a dedicated associative monomer having structure I wherein R1 is a linear saturated C12-26 alkyl group; wherein R2 is hydrogen or a methyl group, and wherein n is from 10 to 30; 0.01 wt% to 2 wt% of a structural unit of a polyethylenically unsaturated monomer; wherein the gradient polymer comprises lt; 0.05% by weight of structural units of sulfonated monomers; wherein the polymer comprises lt; 0.02% by weight of structural units of a monomer having structure II wherein R3 is-H or-CH3; r4 is-H or a-C1-4 alkyl group; r5 is a-C1-4 alkyl group; a is 0 to 50; b is 0 to 20; c is 0 to 50; a + c is 1 to 100 and d is 1 to 4; and wherein the gradient polymer has a gradient polymer morphology.

The application discloses a high-molecular composite damping brominated grafting agent and a preparation method thereof. The high-molecular composite damping brominated grafting agent is a linear isotactic block copolymer composed of isocyanyl alkyl methacrylate, unsaturated carboxylic acid, 3,5-dibromostyrene and para-alkyl styrene. The application further discloses a method for preparing brominated branched butyl rubber. The method for preparing the brominated branched butyl rubber with wide temperature range and high damping has the characteristics of green environmental protection, stable product quality, easy availability of raw materials, and convenient industrial production.

Provided is a release coating agent for a polyester base material, which has excellent adhesion to the polyester base material and has heat peeling resistance. A release coating agent for a polyester substrate according to an embodiment includes an aqueous dispersion in which a polyurethane resin is dispersed in an aqueous dispersion medium. The aqueous dispersion contains a (meth) acrylic polymer that contains, as constituent components, a monofunctional alkyl (meth) acrylate having an alkyl group having 4-22 carbon atoms and a poly (meth) acrylate having 2-6 functional groups.

Provided is a medical adhesive comprising: a water-dispersible acrylic polymer obtained by polymerization of an alkyl (meth)acrylate; and an organic liquid component having a molecular weight of 1,500-7,000 and a hydrophobic ratio of 38-75%.

The present invention provides a single-stranded nucleic acid adsorption inhibitor containing one or more polymers selected from the group A: [group A] Polymer A1: a copolymer containing a structural unit (a) derived from 2-(meth) acryloyloxyethyl phosphorylcholine and a structural unit (b) derived from a C2-C6 alkyl (meth) acrylate having two or more hydroxyl groups as substituents; polymer A2: a copolymer containing the constituent unit (a) and a constituent unit (c) derived from a polyethylene glycol (meth) acrylate; and polymer A3: a copolymer containing the constituent unit (a) and a constituent unit (d) derived from a C1-C6 alkyl (meth) acrylate having a phenyl group or a phenoxy group as a substituent.

Thus, the present invention relates to an aqueous polymer latex of a copolymer obtained by aqueous emulsion polymerization of an ethylenically unsaturated monomer M, iv. 5 to 90% by weight, in particular 10 to 70% by weight, in particular 10 to 50% by weight, based on the total amount of monomer M, of monomer M1 which is 1-heptyl acrylate, v. 0 to 70% by weight, based on the total amount of monomer M, of C2-C6-alkyl esters of acrylic acid excluding tert-butyl acrylate, C8-C 20 -alkyl esters of acrylic acid and C5-C 20 -alkyl esters of methacrylic acid, and at least one monomer M2 selected from mixtures thereof, vi. 5 to 70% by weight, based on the total amount of monomer M, of tert-butyl acrylate, C1-C4-alkyl esters of methacrylic acid, C5-C 20 -cycloalkyl esters of acrylic acid, C5-C 20 -cycloalkyl esters of methacrylic acid, C5-C 20 -cycloalkylmethyl esters of acrylic acid, C5-C 20 -cycloalkylmethyl esters of methacrylic acid (the cycloalkyl in the above monomers is monocyclic, bicyclic or tricyclic, one or two non-adjacent CH2 moieties of the cycloalkyl may be replaced by oxygen atoms, the cycloalkyl may be unsubstituted or may have 1, 2, 3 or 4 methyl groups), and at least one monomer M3 selected from monovinyl aromatic monomers, methylene-gamma-butyrolactone, and mixtures thereof, comprising, where the total amount of monomers M1 and M2 ranges from 10 to 90% by weight based on the total amount of ethylenically unsaturated monomer M, and the total amount of monomers M1, M2 and M3 is at least 90% by weight based on the total amount of ethylenically unsaturated monomer M, relates to an aqueous polymer latex. The present invention also relates to a process for producing the aqueous polymer latex of the present invention. The present invention also relates to the use of these polymer latexes as binders in aqueous coating compositions and aqueous adhesive compositions, particularly as binders in aqueous coating compositions.