460 results about "Dimethacrylate ester" patented technology

A self-lubricating coating is provided which includes a mixture of a curable acrylate composition including a dipentaerythritol pentaacylate and a solid lubricant, such as polytetraflourethylenr. The curable acrylate composition may also include triethylene glycol dimethacrylate. An aramid pulp may also be added to the coating mixture. Also disclosed is a method of manufacturing the coating, and a self-lubricating bearing having the coating disposed on its surface.

The present invention provides materials that have high glucose and oxygen permeability, strength, water content, and resistance to protein adsorption. The materials include an interpenetrating polymer network (IPN) hydrogel that is coated with biomolecules. The IPN hydrogels include two interpenetrating polymer networks. The first polymer network is based on a hydrophilic telechelic macromonomer. The second polymer network is based on a hydrophilic monomer. The hydrophilic monomer is polymerized and cross-linked to form the second polymer network in the presence of the first polymer network. In a preferred embodiment, the hydrophilic telechelic macromonomer is PEG-diacrylate or PEG-dimethacrylate and the hydrophilic monomer is an acrylic-based monomer. Any biomolecules may be linked to the IPN hydrogels, but are preferably biomolecules that support the growth of cornea-derived cells. The material is designed to serve as a corneal prosthesis.

A liquid radiation-curable composition that comprises(A) at least one polymerizing organic substance comprising a mixture of(1) at least one alicyclic epoxide having at least two epoxy groups; and(2) at least one difunctional or higher functional glycidylether of a polyhydric compound;(B) at least one free-radical polymerizing organic substance comprising a mixture of(1) optionally, at least one trifunctional or higher functional (meth)acrylate compound; and(2) at least one aromatic di(meth)acrylate compound;(C) at least one cationic polymerization initiator;(D) at least one free-radical polymerization initiator;(E) optionally, at least one hydroxyl-functional aliphatic compound; and(F) at least one hydroxyl-functional aromatic compound;wherein the concentration of hydroxyl groups in the radiation-curable composition is at least about 1.1 equivalent OH groups per kilogram;wherein the concentration of epoxy groups in the radiation-curable composition is at least about 5.5 equivalent epoxy groups per kilogram; andwherein the amount of trifunctional or higher functional (meth)acrylate compound (B)(1) is from 0% to about 3% of the composition and the amount of aromatic di(meth)acrylate compound (B)(2) is at least 10% of the composition.

In one embodiment of the invention, iCVD is used to form linear thin films using a radical initiator and an alkene. In another embodiment, iCVD is used to form crosslinked thin films by the addition of a crosslinking agent (e.g., a diacrylate or a dimethyacrylate). The incorporation of a crosslinking agent into the thin films is shown to increase systematically with its partial pressure. In one embodiment, when the crosslinker is EDGA and the monomer is HEMA it results in crosslinked P(HEMA-co-EGDA) copolymer. In another embodiment, when the crosslinker is EDGA and the monomer is VP, it results in crosslinked P(VP-co-EGDA). Disclosed are the effects of crosslinker incorporation on the thermal and the wetting properties of the polymers. The unique swelling properties of these films are also described; certain films of the present invention are hydrogels when soaked in water.

The present invention provides interpenetrating polymer network hydrogels that have high oxygen permeability, strength, water content, and resistance to protein adsorption. The hydrogels include two interpenetrating polymer networks. The first polymer network is based on a hydrophilic telechelic macromonomer. The second polymer network is based on a hydrophilic monomer. The hydrophilic monomer is polymerized and cross-linked to form the second polymer network in the presence of the first polymer network. The telechelic macromonomer preferably has a molecular weight of between about 575 Da and about 20,000 Da. Mixtures of molecular weights may also be used. In a preferred embodiment, the hydrophilic telechelic macromonomer is PEG-diacrylate or PEG-dimethacrylate and the hydrophilic monomer is an acrylic-based monomer. The material is designed to serve as a contact lens.

Provided is a nanofiber sheet that sufficiently refined by fibrillation and has high crystallinity of cellulose fiber and can realize a fiber-reinforced composite material exhibiting high transparency, a high elastic modulus, a low coefficient of linear thermal expansion, and high heat resistance and being high in flatness and smoothness. This nanofiber sheet includes crystalline cellulose as the main component and a lignin in an amount of from 10 ppm to 10 wt %. When a fiber / resin composite material obtained by impregnating the nanofiber sheet with tricyclodecane dimethacrylate, subjecting the impregnated product to UV-curing at 20 J / cm2, and heating the cured product in vacuum at 160° C. for two hours includes 60 wt % of the cured tricyclodecane dimethacrylate and 40 wt % of nanofiber, the following physical characteristics (i) to (iii) are satisfied: (i) the parallel light transmittance of light of a wavelength of 600 nm at a sheet thickness of 100 μm is 70% or more; (ii) the Young's modulus is 5.0 GPa or more; and (iii) the coefficient of linear thermal expansion is 20 ppm / K or less.

The present invention provides interpenetrating polymer network hydrogels that have high oxygen permeability, strength, water content, and resistance to protein adsorption. The hydrogels include two interpenetrating polymer networks. The first polymer network is based on a hydrophilic telechelic macromonomer. The second polymer network is based on a hydrophilic monomer. The hydrophilic monomer is polymerized and cross-linked to form the second polymer network in the presence of the first polymer network. The telechelic macromonomer preferably has a molecular weight of between about 575 Da and about 20,000 Da. Mixtures of molecular weights may also be used. In a preferred embodiment, the hydrophilic telechelic macromonomer is PEG-diacrylate or PEG-dimethacrylate and the hydrophilic monomer is an acrylic-based monomer. The material is designed to serve as a contact lens.

The invention discloses a temperature-sensitive magnetic sulfadimidine molecular imprinted adsorbent as well as a preparation method and application thereof, belonging to the technical field of preparation of environment functional materials. A gamma-Fe2O3 / SiO2 magnetic composite material is prepared by using a sol-gel method and is subjected to vinyl modification by using 3-(methylacryloyloxy) trimethoxypropylsilane; with a vinyl-modified magnetic composite material (MPS (Modified Polystyrene)-gamma-Fe2O3 / SiO2) as a substrate material, sulfadimidine as a template molecule, acrylamide as a functional monomer, N-isopropylacrylamide as a temperature-sensitive monomer, ethylene glycol-bis(methylacrylic acid) ester as a cross-linking agent and 2,2'-azobisisobutyronitrile as an initiator, a temperature-sensitive magnetic molecular imprinted polymer is prepared by using a free group polymerization process and is applied to selective recognition and separation of the sulfadimidine in an aqueous solution; and the obtained polymer has the advantages of remarkable heat and magnet stability, sensitive magnet and heat inducting effect, higher adsorption capacity, reversible adsorption / release function along with the temperature and remarkable recognition performance of a sulfadimidine molecule.

The invention discloses a preparation method for a porous monolithic column immobilized enzyme micro-reactor. The porous monolithic column immobilized enzyme micro-reactor is prepared according to the preparation method as follows: firstly, a poly (GMA-co-EDMA) monolithic column is prepared; and then the poly (GMA-co-EDMA) monolithic column is modified by cysteamine and gold nanoparticles so as to obtain a porous polymer monolithic column, wherein, the gold nanoparticles are immobilized on the surface of the porous polymer monolithic column. Enzyme is immobilized to the hole surfaces of the porous monolithic column modified by the gold nanoparticles by utilizing the action of Au-NH2 bond, and then the porous monolithic column immobilized enzyme micro-reactor can be obtained. The preparation method has the advantages as follows: the preparation method is simple; enzyme immobilization reaction conditions are moderate; the permeability of the enzyme micro-reactor is good; large immobilized enzyme quantity can be achieved; the activity, the service life and the stability of enzyme are high in comparison with free solution enzymolysis, and enzyme can be used repeatedly.

The invention disclosed is a hydrogel composition for use as dural substitute, for wound closure of cleft palate and regeneration, and as substrate for cell delivery to the eye. The hydrogel is made of a copolymer of (a) an N-substituted (meth)acrylamide, and (b) a hydroxyalkyl (meth)acrylate, which is covalently crosslinked with dimethacrylate monomers. The swollen, gel is in the form of a sheet or membrane that is readily sterilisable, being homogeneous or heterogeneous, non-degradable, non resorbable, elastically deformable, and has an equilibrium water content of at least 50%.

The invention discloses an anisotropic conductive film composition comprising a binding agent containing at least one of polyester type polyurethane resin, polyurethane acrylate resin, and carbamic acid ester resin; ethylene-acetic acid vinyl ester copolymer; materials capable of free radical polymerization containing tricyclodecane dimethanol diacrylate or tricyclodecane dimethanol dimethyl methacrylate; and organic particles. To be specific, the invention relates to a resin composition used for connection of the circuit and a film, which is provided with an extension rate in a range from 10 to 100% after the solidification and has no obvious retraction and expansion in the connection structure. The reliability of the electric connection under the high temperature and high humidity condition can be reduced. The invention also provides a semiconductor device containing the above mentioned anisotropic conductive film.

The present invention belongs to the technical field of bioengineering, and relates to a method for purifying sulfanilamide by using a molecularly imprinted polymer of a sulfanilamide drug. The method comprises the following steps: (1) mixing and dissolving template molecules of a sulfanilamide drug mixture, a functional monomer of methacrylic acid and a cross-linking agent of ethylene glycol dimethacrylate in a pore forming agent (a ratio of methanol to acetonitrile is 2:3); adding an initiator, and sealing; (2) crushing the synthesized polymer, removing fine particles, removing the template molecules through extraction; (3) drying the template molecule-removed polymer overnight at a temperature of 60 DEG C to obtain the molecularly imprinted polymer of the sulfanilamide; (4) filling the molecularly imprinted polymer into a solid phase extraction column tube; (5) activating the solid phase extraction column, adding an animal tissue extraction solution or a water sample, wherein the animal tissue extraction solution is dissolved in 40% methanol; then leaching the solid phase extraction column to elute and purify the sulfanilamide. The method provided by the present invention has advantages of high selectivity, high specificity and adverse environment resistance, and has broad application potential.

The invention concerns a photocurable adhesive composition comprising, based on total weight of photopolymerizable monomers and / or oligomers of the composition: (A1) 20 to 80 wt % of at least one diacrylate monomer or oligomer thereof (A1); (A2) 80 to 20 wt % of at least one dimethacrylate monomer or oligomer thereof; (B) 0 to 50 wt %, of at least one copolymerizable monomer different from components (A1) and (A2); with the proviso that the composition is free from any thio(meth)acrylate (—SCOCR′=CH2, with R′=H or CH3) monomer or oligomer thereof.

The invention discloses a cross-linked polymer gel electrolyte membrane supported by a hydrophilic polytetrafluoroethylene microporous membrane. When the cross-linked polymer gel electrolyte membrane is prepared, firstly, methoxypolythylene glycol with double bonds and methyl acrylic glycidyl ester segmented copolymer are combined, ethylene glycol dimethacrylate, a thermal initiator and organic electrolyte containing lithium salt are added, stirring is conducted to form an even polymeric precursor solution; the hydrophilic polytetrafluoroethylene microporous membrane is immersed in the polymeric precursor solution and fully absorbs the polymeric precursor solution and is taken out, and the cross-linked polymer gel electrolyte membrane is obtained after cross-linked gelatinization is conducted. According to the cross-linked polymer gel electrolyte membrane, the preparation technology is simple, the electrolyte membrane is suitable for industrial production, a prepared cross-linked polymer gel electrolyte membrane system not only has a good mechanical property, but also has a good electrochemical property, an ionic conductivity at room temperature reaches up to 1.30*10-3 S cm-1, and an electrochemical stability window value can reach 4.5V. Lithium iron phosphate / lithium metal batteries assembled by the cross-linked polymer gel electrolyte membrane have good cycle performance under 25 DEG C and 70 DGE C.

The present invention provides polymerizable dental compositions comprising a dimer acid-derived monomer such as a dimer acid-derived di(meth)acrylate monomer. In one embodiment, the dimer acid-derived monomer is of the formula (I): wherein R1, R2, R3, R4, R5 and R6 are independently selected from H and optionally substituted C1-C25 straight-chained or branched aliphatic, optionally containing 1 or more double or triple bonds, wherein one or more carbons are optionally replaced by R* wherein R* is —C(O)—, —C(O)C(O)—, —C(O)NR7—, —C(O)NR7NR8—, —C(O)O—, —OC(O)—, —NR7CO2—, —O—, —NR7C(O)NR8—, —OC(O)NR7—, —NR7NR8—, —NR7C(O)—, —NR7C(O)O—, —S—, —SO—, —SO2—, —NR7—, —SO2NR7— or —NR7SO2—, where R7 and R8 are independently selected from H and optionally substituted aliphatic, cycloalkyl, heterocycloalkyl, aryl or heteroaryl; provided that at least two of R1, R2, R3, R4, R5 and R6 are substituted C1-25 straight-chained or branched aliphatic wherein at least one carbon is replaced by R* and at least one of the substituents is an alkenyl group.

Provided is a nanofiber sheet that sufficiently refined by fibrillation and has high crystallinity of cellulose fiber and can realize a fiber-reinforced composite material exhibiting high transparency, a high elastic modulus, a low coefficient of linear thermal expansion, and high heat resistance and being high in flatness and smoothness. This nanofiber sheet includes crystalline cellulose as the main component and a lignin in an amount of from 10 ppm to 10 wt%. When a fiber / resin composite material obtained by impregnating the nanofiber sheet with tricyclodecane dimethacrylate, subjecting the impregnated product to UV-curing at 20 J / cm 2 , and heating the cured product in vacuum at 160 DEG C for two hours includes 60 wt% of the cured tricyclodecane dimethacrylate and 40 wt% of nanofiber, the following physical characteristics (i) to (iii) are satisfied: (i) the parallel light transmittance of light of a wavelength of 600 nm at a sheet thickness of 100 [mu]m is 70% or more; (ii) the Young's modulus is 5.0 GPa or more; and (iii) the coefficient of linear thermal expansion is 20 ppm / K or less.

To provide a photopolymerizable inkjet ink, which contains photopolymerizable monomers containing at least one selected from the following compound group (A) compounds of which are negative for skin sensitization, and at least one selected from the following compound group (B) compounds of which are negative for skin sensitization, wherein the compound group (A) is a compound group consisting of caprolactone-modified dipentaerythritol hexaacrylate, polyethoxylated tetramethylol methane tetraacrylate, ethylene oxide-modified bisphenol A diacrylate, caprolactone-modified hydroxy pivalic acid neopentyl glycol diacrylate, polypropylene glycol diacrylate [CH2═CH—CO—(OC3H6)n-OCOCH═CH2 (n≈12)], hydroxyethyl acryl amide, trimethylol propane trimethacrylate, and tricyclodecane dimethanol dimethacrylate, and the compound group (B) is a compound group consisting of ethylene oxide-modified phenolacrylate, isostearyl acrylate, ethylene oxide-modified trimethylol propane trimethacrylate, stearyl methacrylate, and glycerin dimethacrylate.

A radically curable polyurethane composite for dental restorations, including provisional restorations, includes polyurethane dimethacrylate prepolymers that have at least one flexible unit within a polyurethane dimethacrylate backbone, and one or more dimethacrylate monomers. Composite materials made with polyurethane dimethacrylate prepolymers of the invention exhibit superior and optimal properties of flexural strength and deflection-at-break relative to conventional dental resin composites. Composite materials of the invention also provide improved melt-resistance in response to the heat of grinding or finishing, thereby improving the fit of restorations made from the composite and preserving the finishing instruments. Methods of treating a tooth using the radically curable polyurethane composite and methods of making the polyurethane dimethacrylate prepolymers with flexible units is also provided. A kit including the radically curable polyurethane composite is also described.

A transparent laminate including a transparent substrate and structure layer, wherein the structure layer contains protrusion portions, depression portions, or both on a surface thereof, and an average distance between the adjacent protrusion portions or between the adjacent depression portions is equal to or less than a visible light wavelength, the structure layer includes a polymerized product of an active energy ray curable resin composition, the resin composition includes a composition of a (meth)acryloyl group-containing polymerizable compound, the compound composition includes one or more from each of (A), (B), and (C):(A) a monofunctional (meth)acryloyl group-containing polymerizable compound;(B) alkylene glycol di(meth)acrylate; and(C) trifunctional or higher (meth)acrylate,the (A) satisfies certain conditions specifying a type and amount of a compound, and a ratio (E′150 / E′50) of storage elastic modulus E′150 of the structure layer at 150° C. to storage elastic modulus E′50 thereof at 50° C. is 0.5 or less.

The invention relates to a preparation method of a triazine phytocide molecular imprinting solid phase extracting material. The method comprises the following steps of: 1. dissolving butyltripolycyanamide, alpha-methacrylic acid, glycol di(methacrylic acid)ester and azodiisobutyronitrile into trichloromethane and uniformly mixing to obtain a suspending phase I; 2. dissolving polyvinyl alcohol 1788 into water to obtain a suspending phase II; and 3. stirring and reacting the suspending phase I with the suspending phase II and drying in vacuum to obtain the triazine phytocide molecular imprinting solid phase extracting material. In the invention, by adopting a substituted molecular template, the imprinting effect is ensured and the problem of template seepage is solved; the optimized use condition is more convenient for solid phase extraction and ensures favorable impurity removing function and favorable repeatability; the matrix effect is remarkably weakened; and the triazine phytocide molecular imprinting solid phase extracting material is better than the traditional main stream solid phase extracting product, not only can ensure the detecting accuracy but also can improve the detecting sensitivity and effectively protect a chromatographic column.

The invention discloses a method for determining vanillin by virtue of photonic-crystal molecular imprinting hydrogel. The method comprises the steps of firstly, preparing a silicon dioxide photonic crystal on a common glass sheet, and dissolving vanillin, methylpropenoic acid, ethylene glycol dimethacrylate and azodiisobutyronitrile in methyl alcohol to form a molecular imprinting precursor; permeating the precursor between organic glass and the photonic crystal, and performing ultraviolet polymerization; removing silicon dioxide by hydrofluoric acid, and soaking with methyl alcohol to remove vanillin; and forming the photonic-crystal molecular imprinting hydrogel on the organic glass. The photonic-crystal molecular imprinting hydrogel disclosed by the invention has the advantages of high response speed, high selectivity, high sensitivity, high anti-interference capacity and the like when being used for determining trace vanillin. The preparation method is simple, is low in cost and good in reproducibility, can be used for detecting vanillin in foods, and provides a technical support for detecting a food additive.

The invention provides a preparing method of Tetracycline molecular imprinting column. The invention includes the following steps: dissolving template molecular Tetracycline (TC) with ultrasound in methanol, adding functional monomer and pore-forming agent (cyclohexanol and lauryl alcohol), oscillating for 6 hours, adding crosslinking agent (ethylene glycol dimethacrylate) and initiator (azobisisobutyronitrile), after ultrasonic degassing, adding nitrogen for 20 minutes, deoxidizing, pouring the solution into 10cm stainless column with bottom sealed, sealing the top end, putting the column into 60 DEG C water for water bath, after 12 hours, obtaining the molecular imprinting column by heat initiation reaction. Connecting the column to the high-pressure pump for washing away the pore-forming agent and template molecular, in the end the molecular imprinting column with good separation effect is obtained. Compared with traditional bulk polymerization method, the invention has the characteristics of simple preparation for avoiding process of lapping, good molecular recognition ability and so on. The molecular imprinting column provided by the invention is used as a liquid chromatogram filling, and can realize separation, enrichment and purification of Tetracycline antibiotics.

The invention provides a dibutyl phthalate molecularly imprinted polymer (DBP-MIP) solid phase extraction column and a preparation method and application method thereof, belonging to the technical field of analytical chemistry. The DBP-MIP is prepared by dissolving a template molecule DBP, a functional monomer methacrylic acid and a crosslinking agent ethylene glycol dimethacrylate into a porogen chloroform or acetonitrile, adding an initiator azobisisobutyronitrile, filling nitrogen to remove oxygen, carrying out initiated polymerization at 55-75 DEG C, and grinding, sieving and washing a polymer after completing reaction. The preparation method is characterized by weighing a certain amount of polymer and filling the polymer into a polypropylene column to prepare the solid phase extraction column. The prepared MIP solid phase extraction column can highly selectively separate and enrich DBP in samples such as environment, food, chemical products and the like and effectively remove matrix interference, and has great application values and market prospects.

A process for the production of polyurethane di(meth)acrylates in which 1,6-hexane diisocyanate is reacted, without solvent and without subsequent purification operations, with a diol component and hydroxy-C2-C4-alkyl (meth)acrylate in the molar ratio x:(x−1):2, wherein x means any desired value from 2 to 5 and the diol component is a combination of two to four (cyclo)aliphatic diols with molar masses of 62 to 600 and wherein each of the diols constitutes at least 10 mol % of the diols of the diol component and powder coating compositions having the polyurethane di(meth)acrylates as a binder.

A UV-curable ink-jet ink is provided, which has a high sensitivity and allows soft and highly fine patterns to be formed. The UV-curable ink-jet ink includes a mono-functional polymerizable monomer (A) having a hydroxyl group, a di(meth)acrylate ester (B) and a photo-polymerization initiator (C).

The invention relates to a bisphenol A dummy template molecularly imprinted stir bar and a preparation method thereof. The stir bar is a glass bar containing an iron core, wherein the glass bar is coated by a polymer coating; the polymer coating is a bisphenol A dummy template molecularly imprinted polymer; modified silica microspheres with grain size being 400nm are taken as the carriers for synthesizing the imprinted polymer; and biphenyl diphenol is taken as a dummy template molecule. The bisphenol A dummy template molecularly imprinted polymer is prepared by carrying out surface grafting on the surfaces of silica microspheres with grain size being 400nm with vinyltrimethoxysilane to obtain the modified silica microspheres, then subjecting the modified silica microspheres to react withbiphenyl diphenol, 4-vinyl pyridine, ethylene glycol dimethacrylate and azodiisobutyronitrile and using a methanol-glacial acetic acid mixed solution to wash off the template molecule. The stir bar and the preparation method have the following beneficial effect that: SiO2 is taken as the carrier for synthesizing the imprinted polymer, thus greatly adding the number of the effective binding sites and improving the sensitivity.

A macromonomer of the present invention comprises at least functional group and a plurality of hydrophilic moieties. Such a functional group can be an ethylenically unsaturated group that comprises acrylate, methacrylate, sinapate (or 3,5-dimethoxy-4-hydroxycinnamate), cinnamate (or 3-phenylacrylate), senecioate (or 3,3-dimethylacrylate), crotonate, maleate, fumarate, itaconate, vinyl, allyl, or styryl group. Polymeric materials comprise such a macromonomer are used advantageously to provide a hydrophilic or lubricious (or both) coating on polymeric articles, such as medical devices. Such polymeric materials can comprise units of other hydrophilic monomers.

The invention discloses a melamine molecular imprinted solid phase extraction cartridge and a preparation method and application thereof. The melamine molecular imprinted solid phase extraction cartridge is characterized in that a glass cartridge provided with a quartz sand sieve plate on the internal bottom is filled with melamine molecular imprinted polymer particles. Melamine, methacrylic acid, ethylene glycol dimethacrylate are mixed and dispersed in the aqueous solution of methanol or ethanol to prepare the melamine molecular imprinted polymer particles which are filled in the glass cartridge and obtain the melamine molecular imprinted solid phase extraction cartridge. The invention achieves the high-efficiency separation, enrichment and purification of melamine in the milk products, compared with the related techniques, such as prior solvent extraction, C18 solid phase extraction and ion exchange solid phase extraction, the melamine molecular imprinted solid phase extraction cartridge has high enrichment and purification efficiency and low cost, can be repeatedly used and is expected to be the necessary means for the residue pre-treatment of melamine in the milk products.

An ultraviolet-curing resin composition of (a) 5 to 35 parts by mass of a chlorinated polyolefin with a chlorine content of 15 to 40 mass %, (b) 15 to 60 parts by mass of an alicyclic hydrocarbon mono(meth)acrylate, and (c) 5 to 80 parts by mass of a polypropylene glycol di(meth)acrylate; and, per 100 parts by mass of the total amount of components (a), (b) and (c), (d) 0 to 1100 parts by mass of an aliphatic hydrocarbon di(meth)acrylate and (e) 0 to 600 parts by mass of a polyfunctional monomer having 3 to 6 (meth)acryloyl groups in its molecule; and, per 100 parts by mass of the total amount of components (b), (c), (d) and (e), (f) 1 to 15 parts by mass of a photoinitiator; and the composition as an active ingredient in paints, inks, adhesives, sealing agents and primers.