227results about "Acid polymer adhesives" patented technology

The invention discloses an electrolytic adhesive, an electrolytic cotton adhesive tape and a preparation method of the electrolytic adhesive. The electrolytic cotton adhesive tape comprises the following components in parts by weight: 5-10 parts of 1, 1 '-ferrocene diformyl chloride, 10-15 parts of acrylic acid beta-cyclodextrin ester, 3-8 parts of polyethylene glycol diglycidyl ether, 10-20 parts of ionic liquid, 1.5-3 parts of a cross-linking agent, 10-15 parts of tackifying resin and 0.5-1.5 parts of an initiator, and a polymer matrix comprises an acrylic acid-hydroxypropyl acrylate copolymer and acrylic acid-2-ethylhexyl ester. Comprising an adhesive layer and an adhesive tape base layer, the adhesive layer is prepared from the electrolytic adhesive, and the adhesive tape base layer is prepared from acrylic foam; the obtained electrolytic cotton adhesive tape has high initial adhesion and viscosity strength after power-on and power-off re-adhesion.

The invention discloses a dynamic borate bond-based self-healing polyacrylic acid binder and a preparation method thereof. The dynamic borate bond-based self-healing polyacrylic acid binder comprises a polymer main chain and a dynamic cross-linking agent, the dynamic cross-linking agent is a polyol compound containing at least two pairs of ortho-hydroxyl groups; the polymer main chain is formed by copolymerizing the following monomers: an acrylic structural monomer, the molar fraction of which accounts for 85-94% of the total monomer; a functional monomer containing a boric acid group, wherein the molar fraction of the functional monomer accounts for 3-8% of the total monomer; the mole fraction of the flexible monomer containing the acrylate group accounts for 3-8% of the total monomer. Various stresses generated by different negative electrode materials in circulation can be effectively adapted and buffered through a network formed by dynamic boric acid ester bonds and reversible fracture and combination of the boric acid ester bonds, so that the service life of the battery is generally prolonged, the working temperature range of the battery can be remarkably widened, the low-temperature discharge capacity can be remarkably increased, and the high-temperature cycle life can be prolonged.

The invention provides a lithium ion battery binder for inhibiting silicon expansion, a negative pole piece, a lithium ion battery and an electric device, and relates to the technical field of lithium ion batteries. The lithium ion battery binder capable of inhibiting silicon expansion comprises a first polymer and a second polymer, wherein the first polymer is a cross-linked polymer with dynamic reversible covalent bonds; wherein the dynamic reversible covalent bond comprises a disulfide bond or a borate bond; the binder network provided by the invention not only can effectively limit the excessive slippage of a polymer and provide higher mechanical strength, but also can generate reversible fracture and recombination at a stress concentration point in the charging and discharging process due to the dynamic reversibility of a disulfide bond or a borate bond, converts concentrated stress into fracture energy of a chemical bond and dissipates the fracture energy, so that the mechanical strength of the polymer is improved, and the service life of the polymer is prolonged. Therefore, permanent damage of the network is avoided, the pole piece structure is kept complete in long-term circulation, and stable electrochemical performance is achieved.

The invention discloses a polyphenol polyurethane / polyacrylic acid binder as well as a preparation method and application thereof. The binder provided by the invention is obtained by compounding the polyphenol polyurethane and the polyacrylic acid, and the polyphenol polyurethane / polyacrylic acid binder with good mechanical properties and lithium ion conductivity is obtained by controlling the addition amount of the polyphenol polyurethane and the polyacrylic acid and the preparation parameters of the polyphenol polyurethane. The silicon negative electrode half-cell prepared from the binder has high rate performance and high cycle stability, specifically, the initial specific discharge capacity at 2C rate is 1430 mAh / g or above, the capacity retention ratio is 70.6% or above, the ion diffusion rate is 1.73 * 10 <-10 > cm < 2 > / s or above, and the cycle performance is good. The problem that an existing lithium ion battery binder is insufficient in improving the cycling stability and rate capability of a lithium ion battery is solved.

The invention provides a negative electrode binder composition, a negative electrode plate and a secondary battery, aiming at the problem that an existing negative electrode binder cannot effectively inhibit volume expansion of a silicon negative electrode. The negative electrode binder composition comprises a polysaccharide compound, a compound containing a linear rigid chain and metal cations complexed with the polysaccharide compound, and the mass ratio of the polysaccharide compound to the compound containing the linear rigid chain to the metal cations is (0.5-10): (10-40): (0.02-0.5); the polysaccharide compound and the compound containing the linear rigid chain both contain carboxyl groups, the pH value of the negative electrode binder composition is 5-8, the carboxyl groups in the polysaccharide compound and the carboxyl groups in the compound containing the linear rigid chain are at least partially complexed with metal cations, and the polysaccharide compound complexed with the metal cations forms a double helix structure. According to the negative electrode binder composition disclosed by the invention, the polysaccharide compound and the compound containing the linear rigid chain form a self-recovery network structure, so that crushing of negative electrode material particles is effectively prevented, and a material interface is stabilized.

The invention relates to the field of organic polymer synthesis and new energy lithium batteries, in particular to a water-based adhesive, a preparation method of the water-based adhesive and application of the water-based adhesive to a lithium ion battery. The invention relates to a water-based adhesive which is obtained by reacting a polycarboxylic acid polymer with a compound containing an epoxy group. Carboxyl groups in polycarboxylic acid react with epoxy groups in epoxy alcohol through carboxylic acid-epoxy addition reaction, and the adhesive has high water solubility due to the fact that the adhesive contains carboxyl groups and hydroxyl groups; and the current trend that the negative electrode water-based adhesive replaces the oily adhesive is met. Through hydroxyl modified polycarboxylic acid, the flexibility of an adhesive film is improved, the electrochemical performance of a battery cell is greatly improved, the hydroxyl modified polycarboxylic acid type water-based adhesive is applied to a silicon negative electrode to assemble a button cell, and it can be found that the long cycle performance, the rate capability and the capacity retention ratio of the cell are greatly improved.

The application discloses a kind of binder, ceramic diaphragm and its secondary battery.The binder includes first polymer and second polymer, the first polymer and the second polymer are connected by chemical bond;The first polymer is polyacrylate polymer or SBR polymer containing first self-crosslinking structural unit, the Tg of the first polymer is ≤20 ℃, the second polymer is polyacrylic acid polymer or polyacrylamide polymer containing second self-crosslinking structural unit, the Tg of the second polymer is ≥80 ℃.The first polymer of low Tg is resistant to water and oil, but the heat resistance is generally, mainly plays the role of bonding, high Tg second polymer is resistant to oil and not resistant to water, mainly plays the role of heat resistance and improves electrolyte wettability, and by the interaction of first crosslinking structure and second crosslinking structure, so that binder simultaneously has excellent water and solvent resistance and heat resistance, and the affinity of electrolyte is better.

This application discloses a solution-type adhesive, a method for producing the same, and its use. The production of the adhesive mainly comprises the following steps: First, latex particles are obtained by emulsion polymerization of alkyl acrylate monomers, nitrile monomers, and functional monomeric acids. The latex particles have a uniform particle size and are rich in polar functional groups, and can serve as seeds for precipitation polymerization. Nitrile monomers, functional monomeric acids, and acrylamide are used as precipitation polymerization monomers, and the resulting oligomers are deposited on the seed polymer surface by hydrogen bonding and hydrophobicity, forming precipitated particles. Further neutralization with an alkaline solution yields a solution-type adhesive. The solution-type adhesive provided in this application is applied to the negative electrode of a lithium-ion battery, has high adhesive strength, low electrolyte swelling, a certain degree of processing flexibility, a simple manufacturing process, and high lot stability.

The invention discloses a binder, a ceramic diaphragm and a secondary battery thereof. The binder comprises a first polymer and a second polymer, and the first polymer and the second polymer are connected through a chemical bond; the first polymer is a polyacrylate polymer or SBR polymer containing a first self-crosslinking structural unit, the Tg of the first polymer is less than or equal to 20 DEG C, the second polymer is a polyacrylic polymer or polyacrylamide polymer containing a second self-crosslinking structural unit, and the Tg of the second polymer is more than or equal to 80 DEG C. The first polymer with low Tg is resistant to water and oil but general in heat resistance and mainly plays a role in bonding, the second polymer with high Tg is resistant to oil and not resistant to water and mainly plays a role in heat resistance and improvement of electrolyte wettability, and through interaction of the first cross-linked structure and the second cross-linked structure, the adhesive has excellent water resistance, solvent resistance and heat resistance at the same time, and the adhesive has the advantages of being high in adhesive strength, high in adhesive strength and the like. And the affinity with electrolyte is better.

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.

The invention discloses a novel negative electrode binder and a preparation method thereof, and a lithium battery, and belongs to the field of batteries, the negative electrode binder comprises a polyacrylic acid graft copolymer, the graft copolymer comprises a polyacrylic acid main chain and a compound A grafted on the polyacrylic acid main chain, the compound A comprises a chain alkyl group,-OH and-NH2, the-OH and the-NH2 are connected to two ends of the chain alkyl group, the compound A has the following chemical general formula: NH2-(CR1R2) n-OH, n is greater than or equal to 1, R1 and R2 are respectively and independently selected from-H,-X and substituted / unsubstituted alkyl groups, and X is F, Cl, Br or I. The novel negative electrode binder can effectively prevent an electrode from cracking, improves the processing performance, and is beneficial to the cycle performance of a battery.

The invention discloses a multi-element binder for a dry-method electrode as well as a preparation method and application of the multi-element binder, and belongs to the field of lithium ion battery positive electrode materials. The multi-element binder comprises polytetrafluoroethylene and MAV, and the MAV is prepared from the following raw materials: sodium carboxymethyl cellulose, polyacrylic acid and polyvinylpyrrolidone. The preparation method comprises the following steps: (1) dissolving sodium carboxymethyl cellulose, polyacrylic acid and polyvinylpyrrolidone in water to obtain MAV, drying, and crushing into powder; and (2) mixing polytetrafluoroethylene with MAV to obtain the multi-element binder for the dry-method electrode. The multi-element binder provided by the invention can achieve the effects of strong adhesion, excellent conductivity and excellent stability.

The present invention refers to a method for producing copolymers based on ketene acetals and crotonic acid or its esters or salts, which copolymers allow for a wide range of applications and are particularly useful as a degradable ingredient or component of adhesives, coating materials, lubricants, agricultural products, household cleaners, inks, personal care products, cosmetics, pharmaceuticals, packagings, drug delivery systems or the like, as well as to the copolymers thus produced and to their various applications. The resulting copolymers provide good or even superior performance and application properties while at the same time being environmentally compatible and easy to use and to apply and being producible in an economic way.

The invention belongs to the field of sealing of electronic products, and particularly relates to a water-based sealant as well as a preparation method and application thereof. The water-based sealant contains a water-based acrylate emulsion, a water-based polyurethane emulsion, a natural rubber emulsion, a penetrant and a water-soluble chelating agent in a mass ratio of 100: (25-45): (5-20): (0.1-1): (1-5); the solid content of the water-based sealant is 60-65 wt%, and the viscosity of the water-based sealant at the temperature of 25 DEG C is 400-600 cps. The water-based sealant provided by the invention not only is good in environmental protection property, but also is high in bonding strength and good in sealing performance, and meanwhile, the water-proof sealing treatment can be carried out on electronic workpieces in batches, so that the production efficiency is high.

The embodiment of the invention discloses an adhesive and a preparation method thereof, a negative pole piece and a sodium ion battery, the structural formula of the adhesive is shown in the specification, R1 is a monovalent cation, R2 is an alkyl group with a carbon atom number of 1-6, R3 is an alkyl group or alkoxy group with a carbon atom number of 1-5, and n is 3-5. By introducing a long carbon chain into a polyacrylic acid main chain, the glass transition temperature of the polyacrylic acid can be reduced, the flexibility of the polyacrylic acid can be improved, and when the polyacrylic acid is applied to a negative pole piece, the flexibility of the negative pole piece can be improved.

An optical assembly as described herein may comprise a first optical component and a second optical component bonded to the first optical component with a phthalonitrile adhesive. The phthalonitrile adhesive is configured to withstand high temperatures with little or no effect on the alignment of the first and second optical components and / or the optical transmission between the first and second optical components. Methods of making an optical assembly may include bonding a first optical component to a second optical component using a phthalonitrile adhesive.

The invention provides a polymer and a preparation method thereof, a binder, an electrode and a lithium ion battery. The preparation method of the polymer comprises the following steps: mixing monomers, and polymerizing at the temperature of 65-85 DEG C to prepare the polymer; wherein the monomer comprises acrylic acid and a raw material in a mass ratio of (2-4): 1, and the raw material has the following structural formula; r1, R2, R3 and R4 are respectively and independently selected from one of-H, C1-C10 of substituted or unsubstituted alkyl and substituted or unsubstituted C2-C5 alkenyl; the substituent groups in R1, R2, R3 and R4 are independently selected from one of D, a hydroxyl group, a C1-C5 alkyl group and a C2-C5 alkenyl group when appearing each time. According to the present invention, the binder comprising the polymer with the structure is used, and the polymer has rich carboxyl groups, such that the binding performance is effectively improved, the good mechanical property is provided, and the electrode expansion can be effectively inhibited.

The invention discloses a lignin-based self-repairing binder as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. A preparation method of the lignin-based self-repairing binder comprises the following steps: mixing polyacrylic acid, lignosulfonate and a lithium lipoate-based material in a solution, and then carrying out heat treatment to obtain the lignin-based self-repairing binder, the lithium lipoic acid-based material is lithium lipoic acid or itaconic acid cross-linked lithium polylipoic acid. The binder obtained by the invention has a three-dimensional network structure, a lithiated lipoic acid chain segment is introduced into the binder, and lignosulfonate is used as a cross-linked network fulcrum, so that the binder has good adhesion. And lithium ions and polylipoic acid with a cross-linked structure are introduced, so that the cycle performance and the rate capability of the lithium ion battery under high current density are improved.

The invention belongs to the field of organic synthesis, and discloses a preparation method of a multi-cross-linked network polymer binder for a silicon / graphite negative electrode of a lithium ion battery. The preparation method comprises the following steps: taking an acrylic acid structural unit, a hexafluorobutyl acrylate structural unit, an acrylamide structural unit and a cross-linking agent structural unit as polymerization monomer units; the polymer is prepared through a free radical solution polymerization reaction based on photo-initiation. A photo-initiation system is adopted, a crosslinking process is controllable and multiple crosslinking is realized through a composite crosslinking system, a stable three-dimensional network based on physical crosslinking (hydrogen bonds) and chemical crosslinking (a covalent crosslinking network constructed by a strong crosslinking agent and a weak crosslinking agent) is finally constructed, formation of SEI is regulated in situ in the circulation process, and the three-dimensional network has the advantages of being simple in preparation process, low in cost and high in repeatability. Therefore, the electrochemical performance of the silicon / graphite (Si / Gr) composite negative electrode is obviously improved. In addition, the invention also provides the polymer prepared on the basis of the method and application.

The invention provides a polymer, a preparation method, a negative pole piece, a secondary battery and an electric device. The polymer contains a structural unit derived from an unsaturated carboxylic acid monomer, a structural unit derived from an unsaturated cyano monomer and a structural unit derived from a flexible monomer, and the glass transition temperature of the flexible monomer is-60 DEG C to 0 DEG C, and can be-55 DEG C to-15 DEG C. The polymer can reduce warping of a pole piece and widen a processing window of the pole piece.

The present invention relates to poly(meth)acrylates which are produced by a substance polymerization using a first polymerization regulator and a second polymerization regulator. The invention further relates to an adhesive compound and the method for producing the poly(meth)acrylate adhesive compound.

The invention provides an amino acid eutectic gel, a preparation method thereof and an application of the amino acid eutectic gel in preparation of glass laminated glue, and relates to the technical field of glass, the amino acid eutectic gel is obtained through polymerization of a pre-polymerization solution; wherein the prepolymerization solution comprises the following raw materials: an acrylic monomer, an amino acid eutectic solvent, a photoinitiator and a cross-linking agent. The problems that in the prior art, eutectic gel is poor in adhesion, low in strength, low in transparency, poor in ultraviolet resistance, high in inflammability and complex in process can be solved.

The invention discloses a self-crosslinking water-based water-blocking adhesive, a preparation method thereof and an application of the self-crosslinking water-based water-blocking adhesive in an optical cable water-blocking material. The water-blocking adhesive consists of superfine super absorbent resin powder, an acrylic polymerizable mixed solution and a polyvinyl alcohol aqueous solution, wherein the particle size D90 of the super absorbent resin powder is less than 50 microns. The preparation method comprises the following steps: wetting the super absorbent resin powder with alcohol, dispersing in a mixed solution containing high-concentration acrylate, grinding with a colloid mill, and compounding with a polyvinyl alcohol solution to form a stable glue solution. A non-woven fabric or a fiber yarn base material is coated with the glue solution, thermal polymerization crosslinking of monomers can be achieved after drying, and a compact glue layer with cohesiveness and water absorption is formed. The invention effectively solves the problems of serious powder falling and slow water absorption rate of the traditional water-blocking material, has the advantages of fast water-blocking response, firm bonding, environmental friendliness and the like, and is suitable for preparation of water-blocking tapes and water-blocking yarns of optical cables.

The invention belongs to the technical field of sodium-ion batteries, and discloses a sodium-ion battery negative plate and a sodium-ion battery. Slurry for preparing the negative plate comprises the following components: a negative active material, a binder and a conductive agent, the binder comprises polyacrylic acid and butadiene styrene rubber; and the negative plate satisfies 20 < = a / b / (a + b) / epsilon (D / S) < = 56. According to the invention, the binding power of the negative plate and the fast charging performance of the battery are improved.

The invention discloses a dual-functional-layer gradient composite binder for a negative electrode and a preparation method of the dual-functional-layer gradient composite binder, and relates to the technical field of batteries. The dual-functional-layer gradient composite binder is gradient composite slurry loaded on the surfaces of negative electrode active particles; the gradient composite slurry sequentially comprises inner-layer anchoring slurry and outer-layer buffering slurry from inside to outside; the method specifically comprises the following steps: adding graphene quantum dots and hydroxylated carbon nanotubes into a lithium polyacrylate solution, and performing ultrasonic dispersion to obtain inner-layer anchoring slurry; the preparation method comprises the following steps: adding an ionic conductive elastic polymer into a solvent, stirring and swelling at a high speed to obtain a suspension, and carrying out stepped heating and stirring to obtain outer-layer buffer slurry; taking negative electrode active particles, and stirring and mixing the negative electrode active particles with a conductive agent, the inner-layer anchoring slurry and the outer-layer buffering slurry to obtain negative electrode slurry mixed with the dual-functional-layer gradient composite binder; through the gradient structure design, the two binders with complementary functions are organically combined, so that the interface impedance is reduced, and the cycling stability of the battery is remarkably improved.

The invention provides a negative electrode binder, a negative plate and a battery, aiming at solving the problem that the volume expansion of a silicon negative electrode cannot be effectively inhibited by a negative electrode binder of an existing battery. The negative electrode binder comprises a polymer, the polymer comprises an acrylic acid structural unit, a crosslinking structural unit and a grafting unit, at least part of the acrylic acid structural unit is in chemical bonding connection with the grafting unit, and the grafting unit contains carboxyl and sulfonic acid groups. According to the negative electrode binder provided by the invention, a claw-shaped branched chain-net composite structure is constructed by introducing a grafting unit, an acrylic acid structural unit and a cross-linked structural unit, so that the volume change of a negative electrode is effectively inhibited, and the cycling stability and the capacity retention ratio of a battery are improved.

The invention belongs to the technical field of positive electrode slurry preparation, and discloses a positive electrode conductive adhesive, a preparation method thereof, positive electrode slurry containing the positive electrode conductive adhesive and a positive electrode plate. The modified polymer is added into the positive electrode conductive adhesive disclosed by the invention, so that the polymer with softness and rigidity is obtained, and the positive electrode conductive adhesive has excellent flexibility and adhesion. The hollow carbon microsphere material is also added, and the carbon microspheres can improve the pressure resistance of the pole piece material, so that the overpressure of the positive pole piece material is avoided; the volume expansion of the electrode in the charging and discharging process can be buffered, and the thickness expansion of the battery cell in the circulating process is reduced; and electrolyte can be stored, so that the ion conduction capability of the pole piece is improved, and the problem of impedance increase caused by high coating surface density of the electrode is solved. According to the positive pole piece obtained by the positive slurry added with the positive conductive adhesive, the adhesive force between the pole piece and a current collector can be effectively improved.

The purpose of the present invention is to provide a composite structure in which an adhesive member and an adherend can be reused together. Another purpose of the present invention is to provide a polyolefin resin molded article obtained by molding the composite structure. Another purpose of the present invention is to provide an automobile member comprising the composite structure or the polyolefin resin molded article. Another purpose of the present invention is to provide a method for producing a polyolefin resin molded article using the composite structure. The present invention pertains to a composite structure provided with an adhesive member and an adherend, the adhesive member having an adhesive agent formed from an adhesive agent composition containing an acrylic copolymer, the acrylic copolymer has a structural unit derived from an alkyl (meth) acrylate and a structural unit derived from an olefin polymer having a polymerizable unsaturated double bond at the terminal, and the adherend includes a member containing a polyolefin resin.

The present invention aims to provide a composite structure that allows the adhesive member and the adherend member to be recycled without separation. The present invention also aims to provide a polyolefin resin molded article molded from the composite structure. The present invention also aims to provide an automobile member including the composite structure or the polyolefin resin molded article. The present invention also aims to provide a method for producing a polyolefin resin molded article using the composite structure. Provided is a composite structure including: an adhesive member; and an adherend member, the adhesive member including an adhesive formed from an adhesive composition, the adhesive composition containing an acrylic copolymer including a structural unit derived from an alkyl (meth)acrylate and a structural unit derived from an olefin polymer having a polymerizable unsaturated double bond at an end, the adherend member including a member containing a polyolefin resin.

The invention discloses a modified binder for a lithium ion battery pole piece, the lithium ion battery pole piece as well as a preparation method and application of the lithium ion battery pole piece, and relates to the field of battery materials. The modified binder comprises an acrylated or methacrylated polymer binder, the polymer binder contains hydroxyl and / or carboxyl, and meanwhile, the lithium ion electrode plate is subjected to pre-lithiation treatment by adopting a lithium naphthalene reagent. The modified binder in the electrode slurry is subjected to acryloylation treatment in advance, the electrode plate is subjected to pre-lithiation treatment by adopting the lithium naphthalene reagent, in-situ crosslinking of the modified binder caused by anionic polymerization is realized by utilizing the lithium naphthalene reagent, and meanwhile, the requirements of high mechanical strength and uniform dispersity of the binder and efficient pre-lithiation of the electrode are met; the first irreversible capacity loss of the battery is remarkably reduced, the coulombic efficiency and the cycling stability of the battery are improved, additional crosslinking steps or complex reaction conditions are not needed, and the preparation cost and the process difficulty are reduced.