256results about "Hyaluronic acid adhesives" patented technology

The present invention relates to processes utilizing ionic liquids for the dissolution of various polymers and/or copolymers, the formation of resins and blends, and the reconstitution of polymer and/or copolymer solutions, and the dissolution and blending of “functional additives” and/or various polymers and/or copolymers to form advanced composite materials.

The present application discloses methods for repairing hyaline cartilage defects. The methods comprise a combination of introducing autologous bone mesenchymal stem cells to a joint, and applying to the joint a membrane comprising a polyester entangled with a polysaccharide. In some aspects, the bone mesenchymal stem cells are mesenchymal stem cells originating in bone underlying the joint. In these aspects, contact between the joint and the mesenchymal stem cells can be effected by introducing apertures through the bone using standard surgical techniques such as microfracture, abrasion, or drilling. Cartilage which forms in response to application of these methods is hyaline cartilage rather than fibrocartilage.

Water-based, substrate treatment compositions contain (A) at least one chitosan selected from chitosan and a chitosan derivative, and (B) a metal compound containing at least one metal selected from Ti, Zr, Hf, Mo, W, Se, Ce, Fe, Cu, Zn, V and trivalent Cr. In particular, the water-based, substrate treatment compositions can improve the interlayer adhesion between metal materials and resin coating layers such as films or coatings, and can also improve the corrosion resistance and solvent resistance of such metal materials.

The invention relates to a preparation method and application of an environment-friendly lithium ion battery, and in particular relates to a simulated mussel protein environment-friendly lithium ion battery adhesive. By simulating the molecular structure and action mechanism of mussel protein, histidine and dopamine are connected to polyacrylic acid, polymaleic acid, sodium alginate, sodium carboxymethylcellulose, carboxymethyl chitin, carboxymethyl chitosan, abietic acid and other natural or synthesized polymer to prepare a series of aqueous adhesives. The adhesive has a good adhering effect for various cathode materials such as carbon black, graphite and silicon. By adopting the adhesive provided by the invention, various properties of a lithium ion battery can be obviously improved, and especially cycle property of a silicon cathode material in a battery can be obviously improved.

The invention discloses an enhanced-type composite adhesive of a lithium ion battery, a preparation method and an application thereof and belongs to the technical field of lithium ion battery adhesives. In the enhanced-type composite adhesive, a carboxyl group on a carboxyl-functionalized carbon nanotube can be condensed with groups, such as a hydroxyl group and the like, in a water-soluble high-molecular compound to form a bond for forming the enhanced-type composite adhesive. The enhanced-type composite adhesive has following three advantages: (1) the enhanced-type composite adhesive is greatly enhanced in tensile strength; (2) by means of a three-dimensional electric-conductive network formed by the carbon nanotube, the enhanced-type composite adhesive is effectively improved in electric-conductivity; and (3) the enhanced-type composite adhesive contains a special functional group which can be bonded with an electrode active material and is beneficial to ion transmission and tight combination between the composite adhesive and the active material can be maintained even a large size change is generated in the active material, so that a powder-falling phenomenon caused by volume expansion during a charging and discharging process can be prevented and cycling stability of the electrode active material is improved.

The invention discloses an adhesive glue specially used for wood plywood, which is mainly made of the following raw materials: mung bean starch, bisphenol A epoxy resin, modifier, urea, formaldehyde, melamine rubber powder, lignin, biological enzyme, Potassium hydrogen sulfate, polyglycidyl ether, chitosan, polyvinyl alcohol and sodium hexametaphosphate. The adhesive glue special for wood plywood of the present invention has the advantages of strong adhesion, good modeling and dispersibility, and reduces the consumption of formaldehyde, and the free formaldehyde emission of the synthesized adhesive glue product reaches the EO level standard (≤ 0.5mg/L), reducing the emission of formaldehyde, no harm to the human body, belongs to the green environmental protection adhesive. High bonding strength and strong water resistance. The method for preparing the adhesive is simple, does not require very high equipment, and reduces production costs.

Provided is an N-alkyl chitosan derivative having an ultraviolet ray-curable functional group represented by formula (I) given below:

where l+m+n=1, 0<l<1, 0<m<0.5, 0<n<1 and R1 is represented by formula (II) given below:

where R2 denotes a hydrogen atom or a methyl group.

A colored particle (e.g., a spherical particle) comprising an organic solid component (e.g., a polymer component) and a coloring agent (e.g., an oil-soluble dye, and an organic or inorganic pigment) is produced by eluting a water-soluble auxiliary component comprising at least an oligosaccharide from a composition having a disperse system, in which a particulate dispersed phase comprising the organic solid component and the coloring agent is dispersed in a matrix comprising the auxiliary component. The weight ratio of the polymer component relative to the auxiliary component may be about 55/45 to 1/99. The proportion of the coloring agent may be about 0.001 to 100 parts by weight relative to 100 parts by weight of the organic solid component. Such a process ensures conveniently and industrially advantageous production of a colored particle (e.g., a colored polymer particle) corresponding to the dispersed phase independently of affinity between the dispersed phase and the matrix.

The invention relates to a polymer composition comprising a biologically degradable polymer and a material from sea plants and/or shells of sea animals or at least two components selected from the group consisting of saccharides and the derivatives thereof, proteins, amino acids, vitamins and metal ions. The invention additionally relates to a molded article comprising said polymer composition. Said molded article may be used packaging material or fibrous material, in the form of fibrous material as mixing component for the production of yarns, and in the form of fibrous material for the production of nonwoven fabrics or woven fabrics.

The invention provides a preparation method for a wood adhesive with starch as a raw material, which belongs to the technical field of binders. The wood adhesive is prepared from the following raw materials expressed in weight parts: 20 to 30 parts of plant starch, 5 to 10 parts of alum, 4 to 7 parts of magnesium oxide, 2 to 8 parts of polyvinyl alcohol, 2 to 3 parts of phenol, 2 to 3 parts of sodium hydroxide, 1 part of methylolacrylamide, 2 to 4 parts of kaolin, 2 to 4 parts of bentonite, 4 to 8 parts of chitosan, 2 to 4 parts of glycerin, 1 part of disodium ethylene diamine tetraacetate, 2 parts of agar, 3 to 6 parts of cellulose and 30 to 50 parts of water. The wood adhesive provided by the invention has the following technical effects: raw materials used in the invention are nontoxic and harmless and no organic solvent is added, so the wood adhesive accords with requirements on furniture quality by the masses. According to the invention, starch is used as a main raw material, wood with high strength and a strong bonding force can be prepared, and novel application of transgenic crops is provided.

Disclosed is a foaming material composite including a water-soluble polysaccharide having ester linkage or amide linkage, a foaming agent, and a plasticizing agent.

A polymer blend is prepared by dissolving chitosan and a second polymer in an acidic aqueous solution to form an aqueous polymer blend, dehydrating said aqueous polymer blend, and recovering said polymer blend. The second polymer may be selected from the group consisting of polyether glycols including polyethylene glycols; cellulose esters including cellulose acetate; poloxamers; polysaccharides including dextran and guar; polyvinylpyrrolidones; polyvinyl alcohols; and mixtures or copolymers thereof. These polymer blends swell in an acidic environment and deswell in a more neutral or basic environment. This technology is valuable for the dispensing of biologically active material or drugs into a surrounding environment, especially the environment as is found in the gastrointestinal tract. Since the various polymer blends of the present invention are not covalently or ionically crosslinked, but are physically combined, each polymer in the physical blend maintains its original chemical structure, and therefore, is safe for oral administration.

The invention discloses a wood adhesive, in the technical scheme, konjac glucomannan and chitosan which serve as main raw materials, glacial acetic acid which serves as catalyst, polyvinyl alcohol which serves as modifier and pure water which serves as solvent are mixed and react at 25 to 90DEG C to prepare the wood adhesive. The invention has the advantages of wide sources of the three raw materials, high bonding strength, lower cost and no pollution. The natural polymer-based wood adhesive prepared by the invention is applied to the bonding of poplar veneer, the average value of the dry bonding strength is 4.01MPa, the average value of the wet bonding strength is 2.88MPa, and the dry and the wet strength reaches the values of national standard requirements.

Biomimetic adhesive compositions can be used in various aspects of subterranean treatment operations. Methods for treating a subterranean formation can comprise: providing an adhesive composition that comprises a first polymer comprising a plurality of monomers that comprise a phenolic moiety, a biopolymer that is crosslinkable with the first polymer, a crosslinking agent, and an oxidizing agent; introducing the adhesive composition into a subterranean formation; and forming a coacervate-bound surface in the subterranean formation by crosslinking the first polymer.

An aqueous adhesive composition and a process for preparing such compositions are disclosed. The composition comprises macromolecular complex comprising (A) a first component comprising (i) a framework element and (ii) a polyphenol, and (B) second component comprising a polypeptide, oligopeptide, amino acid, or polyamine. The framework element comprises (a) a polypeptide, oligopeptide, amino acid, or polyamine, (b) a polysaccharide, oligosaccharide, or monosaccharide, or a saccharide conjugate, or (c) a lignin, a lignan or a lignin conjugate. The polyphenol comprises a tannin, a tannic acid, a flavonoid, or a poly-resorcinol. An adhesive precursor composition comprising the first component is also disclosed.

By irradiating ⁶⁰Co γ ray to chitin/chitosan, chitin/chitosan having high molecular weight is separated or decomposed into low molecular weight chitin/chitosan. A method of producing an osteoconduction substance comprises the steps of irradiating ⁶⁰Co γ ray to chitin/chitosan to produce low molecular weight chitin/chitosan; preparing chitosan sol by dissolving low molecular weight chitin/chitosan in an acidic aqueous solution to obtain a chitosan acidic aqueous solution and kneading the chitosan acidic aqueous solution and apatite powder; and neutralizing the chitosan sol by the use of a neutralizing agent.

The invention provides a rubber adhesive, which comprises the following components: natural rubber, styrene butadiene rubber, polyisobutylene rubber, chlorosulfonated polyethylene, lignin, kieselguhr, pineneresin, tert-butyl phenolic resin, promoter M, zinc oxide, stearic acid, anti-aging agent 4010, anti-aging agent DNP, anti-aging agent MB, methylbenzene and chitin, and has the characteristics of aging resistance, high-pressure resistance and high-temperature resistance.

Disclosed is a cellulose ester film which is suppressed in volatilization of components during film formation, while having high surface flatness, high durability after saponification and good adhesion to a polarizer. Also disclosed is a method for producing such a cellulose ester film by melt forming. Further disclosed are a polarizing plate having high light resistance and high durability, and a liquid crystal display having high image quality. Specifically disclosed is a cellulose ester film characterized by containing a cellulose ester, a compound represented by the general formula (1) below, and a compound represented by the general formula (2) below.

The invention provides compositions and methods for in situ repair of compromised polymeric membranes. The invention is useful for repairing compromised polymeric membranes without requiring the knowledge of damage location or the disassembly of a system. The invention relates to preferential blocking of damaged sites using agglomerates and subsequent cross-linking to form sturdy plugs.