1105 results about "Monomer" patented technology

A production method for an aqueous dispersion according to the present invention comprises polymerizing a first monomer that includes tetrafluoroethylene in the presence of a compound represented by formula (X) and a polymerization initiator under conditions in which an aqueous medium is present but an emulsifier that includes fluorine atoms is substantially absent to produce an aqueous dispersion that includes particles of a first fluorine-containing polymer that has an average particle diameter of no more than 500 nm and does not have a melting point.　Formula (X): C(X1)(X2)=C(X3)-L-Z. In formula (X), X1, X2, and X3 are each independently a hydrogen atom, a fluorine atom, a perfluoromethyl group, or an alkyl group, L is a single bond or a divalent linking group, and Z is an anionic group or a salt of an anionic group.

The invention discloses a low-loss resin composition, which is prepared from the following main components in parts by weight: 10 to 90 parts of acenaphthylene-p-vinylbiphenyl copolymer, 10 to 70 parts of cross-linking agent, 20 to 60 parts of elastomer, 0.1 to 3 parts of initiator and 10 to 90 parts of filler. The acenaphthylene-p-vinylbiphenyl copolymer is obtained by pre-polymerizing acenaphthylene and divinylbiphenyl, the acenaphthylene monomer residue is less, the acenaphthylene monomer is difficult to volatilize in a resin system, implosion caused by too fast curing reaction of the resin system is prevented while good reaction activity is maintained, and a subsequent curing product is high in crosslinking density and good in heat resistance; a machining window is wide, and subsequent production and machining are facilitated; and an acenaphthylene structure has high symmetry and rigidity and does not contain elements such as oxygen, sulfur and nitrogen, so that the resin composition has excellent dielectric properties and thermal properties and a low thermal expansion coefficient, and an elastomer as a cross-linking curing matrix material can provide the characteristics of low dielectric constant, low dielectric loss, low water absorption and the like.

The invention relates to a biodegradable composition as well as a preparation method and application thereof, and belongs to the technical field of compositions of high-molecular compounds. The biodegradable composition disclosed by the invention is prepared from the following components in parts by weight: 44 to 90 parts of PBAT resin, 5 to 15 parts of amorphous resin and 5 to 40 parts of inorganic filler, based on the total molar weight of a terephthalic acid monomer unit and an adipic acid monomer unit in the PBAT resin, the molar ratio of the terephthalic acid monomer unit is 47-49%; the amorphous resin is at least one of PPC-P, PMMA (Polymethyl Methacrylate), PETG (Polyethylene Terephthalate Glycol) and PCTG; the inorganic filler comprises at least one of calcium carbonate and talcum powder; the particle size D50 of the calcium carbonate is less than 5 [mu] m, and / or the particle size D50 of the talcum powder is less than 8 [mu] m. The biodegradable film produced by adopting the biodegradable composition under a low blow-up ratio process has excellent dart falling performance, and can meet the requirement of ultra-long shelf life.

The present invention makes it possible to provide a thermoplastic resin including a constituent unit (A) derived from a monomer represented by general formula (1). (In the formula, each R1 independently represents a C6-14 aryl group or a C7-17 aralkyl group, each R2 independently represents a hydrogen atom, a C6-14 aryl group, or a C7-17 aralkyl group, each a independently represents an integer of 0 or 1-3, each R3 independently represents -OH or -0-(CH2)n-OH, and n represents an integer of 1-4.)

The invention discloses a degradable armed acetal epoxy monomer and a preparation method thereof, the acetal epoxy monomer has the following molecular structure general formula: # imgabs0 #, in the formula, R1, R2, R3 and R4 are independently selected from one of hydrogen, methoxyl and ethyoxyl. The degradable acetal epoxy monomer is prepared through the aldol condensation reaction, the thermosetting epoxy resin prepared from the epoxy monomer and the curing agent can be rapidly degraded under the normal-pressure, mild and specific conditions, and huge economic and environmental advantages are achieved for recycling and reusing of the thermosetting resin. When the prepared degradable epoxy resin is used in thermosetting epoxy resin, under the degradation condition provided by the invention, a thermosetting epoxy resin matrix is degraded into alcohol and aldehyde with relatively small molecular weight, the mixture can be dissolved in an organic solvent, and a degradation product can be extracted through simple separation, so that the purpose of recovering the resin is achieved.

The present invention relates to a binder composition for a positive electrode comprising a polymer P1 containing repeating units derived from vinylidene fluoride and a hydrophilic polymer P2 containing repeating units derived from at least one monomer of formula R1R2C = C (R3) C (O) R (I) wherein R1, R2 and R3 are independently selected from H and C1-C5 alkyl; r is selected from-NHC (CH3) 2CH2C (O) CH3,-NR 'R "or-OR', where R 'and R" are independently selected from H and C1-C18 alkyl optionally substituted by one or more hydroxyl, thiol or amino functional groups or five to six membered heterocycles comprising at least one nitrogen atom in the ring, characterized in that the hydrophilic polymer P2 has a weight average molecular weight greater than 30000 g / mol, advantageously greater than 50000 g / mol, preferably greater than 65000 g / mol, more preferably greater than 80000 g / mol.

The invention provides a composition for forming a coating film which comprises (1) a polymer of a monomer mixture containing monomers represented by the following formulae (A) to (D):(wherein Ta, Tb, Tc, Td, Ua1, Ua2, Ub1, Ub2, Ub3, Qa, Qb, Qc, Ra, Rb, Rc, Rd, An−, m and n are as defined herein), where a ratio of a total of the anionic monomer represented by the above-mentioned formula (A) and the cationic monomer represented by the above-mentioned formula (B) based on total monomers contained in the monomer mixture is 40 mol % or more, and (2) a polycarbodiimide containing a structure represented by the following formula (E):—N═C═N—  (E)a coating film which is a cured product thereof and a process for producing the same, and a cured product and a process for producing the same.

The present invention relates to a thermal development apparatus (1) for removing non-crosslinked polymer or monomer from a first surface (5a) of a flexographic plate (5). The apparatus according to the invention comprises a moving assembly (10) defining a support surface (11a) for the plate (5), wherein said moving assembly (10) moves said flexographic plate (5) along a predetermined trajectory. According to the invention, said moving assembly (10) comprises a support cylinder (11) which includes a cylindrical body (11') that develops around a longitudinal axis (100), wherein said support cylinder (11) further includes a cover layer (11') which partially covers an outermost surface (18) of said cylindrical body (11) and defines said support surface (11a) for said plate (5); Said moving assembly (10) also comprises a plurality of connecting pins (43) connected, directly or indirectly, to said outermost surface (18) of said cylindrical body (11) at a cutoff region (60) of said cover layer (11'), wherein said pins (43) are aligned parallel to said longitudinal axis (100) and wherein, for each pin (43), the radial distance (R1, R*) between said longitudinal axis (100) and a free end (431) of said pin (43) is less than the radial distance (R2) between said longitudinal axis (100) and the support surface (11a) defined by said cover layer (11').

To provide hollow particles excellent in dielectric property and solvent resistance and able to decrease the permittivity and dielectric dissipation factor of a resin molded body, and a method for producing the hollow particles. Hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell and which have a void ratio of 50% or more, wherein the shell contains, as the resin, a polymer in which 70% by mass or more of a crosslinkable hydrocarbon monomer unit is contained, and wherein, in a hollow particle immersion test in which a mixture obtained by adding 0.1 mg of the hollow particles to 4 mL of toluene and shaking them for 10 minutes at a shaking rate of 100 rpm, is left to stand for 48 hours in an environment at 25° C., less than 5% by mass of the hollow particles submerge in the toluene.

The invention provides a water-soluble polymer, a preparation method thereof and application of the water-soluble polymer in a composition for grinding, and relates to the field of water-soluble polymers. The structural general formula of the water-soluble polymer is as follows: # imgabs0 #, wherein R1 is at least one of a hydrogen group, a cyanoethyl group and an isobutyronitrile group; r2 and R3 are respectively and independently at least one of alkyl, alkoxy, ester group, carboxylic acid, amide and aromatic ring; n is any natural number. According to the preparation method, proper polymeric monomers can be selected as required to prepare polymers with different functions, and the solubility and functionality of the polymers are improved through a functional group modification method so as to meet different application requirements.

The invention discloses a single-chain nanoparticle composite reinforced and toughened plastic material and a preparation method thereof, and belongs to the technical field of polymer plastics. The reinforced and toughened plastic material is prepared from the following raw materials in parts by weight: 10 to 20 parts of polymer monomer, 0.004 to 0.005 part of initiator, 0.05 to 0.06 part of chain transfer agent, 8 to 12 parts of solvent and 0.1 to 0.2 part of functional filler, the preparation method specifically comprises the following steps: (1) weighing the raw materials; (2) uniformly mixing the raw materials, and performing nitrogen atmosphere replacement and polymerization reaction; and (3) re-precipitating, and drying in vacuum to obtain the product. The reinforced and toughened plastic material disclosed by the invention not only has excellent performance in the aspect of tensile property, but also shows excellent mechanical response under a bending-resistant load, and is suitable for engineering plastic application scenes with relatively high requirements on structural stability and use safety.

To provide a laminate excellent in mechanical characteristics, damping characteristics, transparency and shock resistance.SOLUTION: A laminate obtained by laminating a resin composition containing a polyacrylate resin and silica particles at least on one surface of a transparent substrate is such that: the polyacrylate resin contains as a monomer unit, an acrylate monomer (A) represented by the following formula (1) [in the formula (1), R0 represents a hydrogen atom, a methyl group or an ethyl group; R1 represents a hydrogen atom or a methyl group; and n represents an integral number of 1-9]; a content of the silica particles is 15-50 vol.% based on the entire resin composition; and an average particle diameter of the silica particles is less than 150 nm.SELECTED DRAWING: Figure 1

The application provides a crosslinked polyethylene insulating material with intrinsic self-repairing and recyclable characteristics, a preparation method and application thereof, and relates to the technical field of cable materials.The crosslinked polyethylene insulating material with intrinsic self-repairing and recyclable characteristics is prepared from the following components in parts by weight: 99.7 parts by weight of low-density polyethylene, 1.0-2.6 parts by weight of peroxide, 0.1-0.5 parts by weight of antioxidant, 5-20 parts by weight of maleimide monomer, 0.35-0.7 parts by weight of catalyst, 0.5-3.0 parts by weight of ligand and 0.5-3.0 parts by weight of furan-based small molecule.The low-density polyethylene is functionally modified through catalytic amination reaction, so that the chain breaking and crosslinking in the modification process are avoided, and the mechanical properties, insulating properties and dielectric properties of the crosslinked polyethylene are enhanced through the post-absorption of the introduced peroxide.Meanwhile, the dynamic reversible Diels-Alder reaction introduced by the post-absorption of the furan-based small molecule enables the polyethylene insulating material to have good intrinsic self-repairing effect on mechanical damage and electrical damage.

The invention discloses a phase-change composite material as well as a preparation method and application thereof, and belongs to the technical field of phase-change materials. The phase-change composite material is prepared from the following raw materials in parts by weight: 2 to 10 parts of acrylate polymer, 0.02 to 0.3 part of cross-linking agent, 0.1 to 3 parts of emulsifier, 1 to 25 parts of solvent, 0.05 to 3 parts of initiator, 0.5 to 3 parts of acrylate monomer, 2 to 20 parts of phase-change material, 0.5 to 3 parts of heat-conducting filler, 0.01 to 2.5 parts of thickening agent and 0.1 to 1 part of stabilizer. The phase-change composite material has good adhesion and flexibility, and does not have a layering phenomenon after being repeatedly used, so that a good cooling effect can be maintained, and the service life is prolonged. The preparation method is simple, easy to operate and high in efficiency. The phase change composites may be used to regulate temperature, for example, in insulated containers.

The invention relates to a polymer property prediction method and device based on substructure and knowledge enhancement. The method comprises the following steps: obtaining a polymer monomer SMILES to be predicted; adopting a rule-based BRICS algorithm to cut a polymer monomer SMILES to be predicted, and obtaining a substructure SMILES; converting the SMILES of the polymer monomer to be predicted and the SMILES of the substructure into a molecular image, and matching a property influence flag bit for the molecular image of the substructure based on a pre-constructed labeling dictionary; utilizing an improved double-flow ResNet network to respectively extract feature vectors of a polymer monomer molecular image to be predicted and a substructure molecular image to be predicted; respectively polymerizing the feature vector and the property influence flag bit of the substructure, and splicing the feature vector and the feature vector of the polymer monomer to be predicted to obtain a target feature vector to be predicted; and inputting the to-be-predicted target feature vector into a pre-trained multi-layer perceptron model to obtain the property of the to-be-predicted polymer monomer. Compared with the prior art, the prediction precision and generalization ability of polymer property prediction are remarkably improved.

The invention provides polyester and a preparation method and application thereof, the polyester comprises a structural unit derived from the following monomer components: at least one monomer component I selected from hydroxybenzoic acid or hydroxynaphthoic acid; and at least one monomer component II, wherein the monomer component II is selected from p-hydroxybenzoic acid containing a substituent group. A small amount of the monomer component II is introduced into the polyester material, interaction points are provided for chain segments of the polymer, the chain segments are promoted to form a branched structure, and therefore the melt strength of the polymer is well improved.

The invention discloses a high-performance PEEK composite material and application thereof in a robot skeleton, and belongs to the technical field of special engineering plastics, the PEEK composite material comprises the following components by weight: 50-80 parts of PEEK, 10-20 parts of an elastomer, 15-30 parts of carbon fiber, and 5-10 parts of a compatilizer, monomers 1-4 are copolymerized to obtain a hyperbranched polyaryletherketone copolymer, the hyperbranched polyaryletherketone copolymer is terminated by polysiloxane and modified by maleic anhydride, the monomer 1 is 4, 4 ', 4'-trihydroxy-3, 3 ', 3'-trimethoxytriphenylmethane, the monomer 2 is isopropyl hydroquinone, the monomer 3 is hydroquinone, and the monomer 4 is 4, 4 '-difluorobenzophenone. According to the high-performance PEEK composite material and the application of the high-performance PEEK composite material in the robot skeleton, the self-made compatilizer is added, so that the PEEK and carbon fiber composite material has the characteristics of high strength, good interfacial compatibility, good bending fatigue performance and the like.

The invention discloses a dual-curing solvent-free high-temperature-resistant epoxy resin structural adhesive as well as a preparation method and application thereof. The structural adhesive comprises the following components in percentage by weight: 1.5-5% of a latent curing agent, 2-5% of a high-heat-resistant curing agent, 1-5% of nano filler, 0.1-0.3% of a curing accelerator and the balance of epoxy resin. By accurately screening epoxy resin monomers, optimizing a dual curing agent system and introducing the high-temperature-resistant nanofiller, room-temperature stability, medium-temperature rapid curing and gelling and high-temperature complete curing are realized, and the final heat-resistant temperature is greater than or equal to 300 DEG C. Through the synergistic effect of the epoxy resin, the medium-temperature curing agent and the high-temperature curing agent, the crosslinking stability at different temperature stages is ensured. In addition, through introduction of the inorganic nano filler, the high-temperature mechanical property and the heat-resistant stability of the material are further improved. The preparation method does not need to use a solvent, and the prepared epoxy resin structural adhesive has excellent heat resistance and mechanical strength and is suitable for the fields of high-temperature structural adhesives, aerospace composite materials, high-temperature-resistant coatings and the like.

The invention belongs to the field of high polymer materials, and discloses a POSS (Polyhedral Oligomeric Silsesquioxane) modified monomer as well as a preparation method and application thereof. According to the POSS modified monomer, a vinyl POSS (T8-POSS) basic framework with a T8 structure is adopted, a hydrophobic perfluoroalkyl chain (SF) and a thermosensitive benzocyclobutenyl (Si-B) unit are introduced to an inorganic cage, when the POSS modified monomer is subjected to thermocuring to form a multifunctional coating, a hybrid network structure can be constructed by adjusting the content of the SF and the content of the Si-B unit, and therefore the multifunctional coating is formed. The effects of controlling the optical, mechanical, thermal and surface wettability of the coating are achieved, and the coating has high mechanical strength and environment barrier efficiency. Meanwhile, the invention also discloses a preparation method of the POSS modified monomer and a coating prepared from the POSS modified monomer.

The invention provides a polymerizable monomer with the refractive index larger than 1.7 and a preparation method and application thereof.The polymerizable monomer has the structure shown in the formula G1 or G2 or G3 or G4 or G5 or G6, the refractive index of the polymerizable monomer is 1.7 or above, and therefore a holographic recording medium has various excellent characteristics such as high sensitivity, high diffraction efficiency and high refractive index modulation degree; the holographic recording medium is used for a holographic grating, so that the holographic grating has high diffraction efficiency and high refractive index modulation degree.

Provided is a polymer to be used in a water repellent agent for fibers, the polymer including a repeating unit derived from a monomer (1) represented by formula (1-1): CRaRb=C(-Rc)-X-CY3-nZn or formula (1-2): CRaRb=C(-Rc)-X-NY2-nZn [in each of the formulae: Ra, Rb and Rc each independently represent a hydrogen atom or a hydrocarbon group having 1-5 carbon atoms; X represents a single bond or a divalent group; Y's each independently represent a hydrogen atom, or a hydrocarbon group having 1-10 carbon atoms; n represents an integer of 1 or 2; Z's each independently represent -Z1-SiZ2 3; Z1 represents a single bond or a divalent group; Z2's each independently represent -(O-Si(-OSiZ21 3)2)p-O-SiZ22 3; Z21's each independently represent a hydrocarbon group having 1-10 carbon atoms or -OSiZ211 3; Z211's each independently represent a hydrocarbon group having 1-10 carbon atoms; Z22's each independently represent a hydrocarbon group having 1-10 carbon atoms or -OSiZ221 3; Z221's each independently represent a hydrocarbon group having 1-10 carbon atoms; and p represents an integer of 0-196].

A resin composition and an article made therefrom are provided. The resin composition includes: (A) 100 parts by weight of an unsaturated bond-containing polyphenylene ether resin; (B) 20 parts by weight to 150 parts by weight of a copolymer, the copolymer having a structural unit formed by a monomer of Formula (1) and a structural unit formed by a monomer of Formula (2), and the content of the structural unit formed by the monomer of Formula (2) in the copolymer is 55 wt % to 90 wt %; and (C) 10 parts by weight to 40 parts by weight of an unsaturated bond-containing crosslinking agent. The resin composition may be used to make various articles, such as a prepreg, a resin film, a laminate or a printed circuit board, and at least one of the following properties can be improved, including glass transition temperature, Z-axis ratio of thermal expansion, multi-layer board heat resistance, interconnect stress test, dissipation factor aging rate, temperature coefficient of dielectric constant, temperature coefficient of dissipation factor and branch-like pattern at laminate edges.

The invention relates to a PBT-PC composite material as well as a preparation method and application thereof. The PBT-PC composite material comprises PBT resin, PC resin and a transesterification inhibitor, the content of tetrahydrofuran in the PBT resin is less than 1000 ppm; the content of bisphenol A in the PC resin is less than 100 ppm. According to the invention, the content of tetrahydrofuran in the PBT resin and the content of residual bisphenol A monomer in the PC resin are controlled, so that the PBT-PC composite material still has good tensile strength after staying at high temperature, and further has a wider processing window in alloying production.

To provide hollow particles in which the dielectric dissipation factor is decreased, and the performance stability in high-humidity environment is improved. Hollow particles comprising a shell, which contains a resin, and a hollow portion surrounded by the shell, wherein the hollow particles have a void ratio of 50% or more; wherein the shell contains a polymer as the resin, and a content of a crosslinkable monomer unit is 60% by mass or more in 100% by mass of all monomer units of the polymer; and wherein an aqueous dispersion of the hollow particles, which is obtained by dispersing the hollow particles with a volume of 0.35 cm3 in 100 mL of deionized water, has a pH of 6.5 or more and 7.5 or less and a conductivity of 50 µS / cm or less.

Modified regenerated collagen fibers which have improved water resistance and heat resistance problematic in regenerated collagen fibers, impart heat shape memory ability, are excellent in stretchability (tenacity) and the feel of the surfaces, and have no coloring. The modified regenerated collagen fibers contain a component (A), which is vinylbenzoic acid or a salt thereof, or a polymerized product containing the component (A) as a constituent monomer in the regenerated collagen fibers.

Provided are a highly accurate method for predicting a physical property of a polymer and a polymer having excellent physical properties such as an ability to selectively capture specific cells and biocompatibility. The method for predicting a physical property of a polymer includes Step 1 of obtaining a structure of a monomer from a structure of a polymer, Step 2 of converting the obtained structure of the monomer or a converted structure of the monomer into a format recognizable by a computer, Step 3 of computing a descriptor from the format recognizable by a computer, Step 4 of obtaining a physical property of the polymer and performing a regression calculation using the physical property of the polymer as an objective variable and the descriptor as an explanatory variable to construct a regression model, Step 5 of computing a format of a new monomer from the format recognizable by a computer, Step 6 of computing a descriptor from the format of the new monomer or a converted format of the new monomer, and Step 7 of applying the descriptor of the new monomer to the regression model to predict a physical property of a polymer produced by polymerizing the new monomer.

The present invention provides a phthalazinone - structured polymer - toughened bismaleimide resin, a preparation method thereof and an application thereof, which relate to the technical field of synthesis of polymer materials. The phthalazinone - structured polymer - toughened bismaleimide resin is mainly prepared from bismaleimide monomers, allyl compounds, phthalazinone - structured polymers, and optionally other thermoplastic resin toughening agents, optionally co - curing components and optionally curing agents. Among them, the phthalazinone - structured polymer has excellent heat - resistant performance and good solubility, and its heat resistance matches that of high - temperature - resistant bismaleimide resins. It can be used as a toughening agent to significantly improve the impact toughness of bismaleimide resins and their composites, and maintain the excellent heat - resistant performance of bismaleimide resins, so that bismaleimide resins can be applicable to more application scenarios.

To provide a resin material which improves handleability of a semi-cured product.SOLUTION: There are used: a polymerizable unsaturated bond-containing resin which is a polymer using a polymerizable compound represented by the following formula (1) as a monomer component and has a weight average molecular weight (Mw) of 3,000 or more; and a resin composition containing the resin. In addition, there are provided a prepreg, a resin film, a metal-clad laminate, a printed wiring board, and a semiconductor package obtained using the resin or the resin composition. (In formula (1), Ar1 represents an aromatic ring structure and has one or more polymerizable unsaturated bond-containing groups on an aromatic ring; X represents a structure represented by the following formula (2); and n represents an integer of 1-10.) (In formula (2), R1 represents a C1-8 alkylene group; and Ar2 represents an aromatic ring structure.)SELECTED DRAWING: None

A method for producing modified polytetrafluoroethylene including: polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I) to obtain a modified polytetrafluoroethylene:wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more. Also disclosed is a composition containing the modified polytetrafluoroethylene and the polymer (I).

To provide hollow particles excellent in performance stability in a high-humidity environment and low in relative permittivity. Hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell, wherein the shell contains, as the resin, a polymer in which from 70 parts by mass to 100 parts by mass of a crosslinkable monomer unit is contained in 100 parts by mass of all monomer units; wherein a void ratio is 60% or more; wherein a content of a surfactant present on a surface of the hollow particles is 200 ppm or less; and wherein a relative permittivity at a frequency of 1 MHz is 1.6 or less.