818 results about "Polyhydroxy compound" patented technology

Two (or more), -component, body-implantable, absorbable, biocompatible, putty, and non-putty hemostatic tamponades for use in surgery. Component 1 is a finely powdered bulking material, preferably less than 50 microns, e.g. the calcium, magnesium, aluminum, or barium salts of saturated or unsaturated carboxylic acids containing about 6 to 22 carbon atoms, hydroxyapatite, DBM, polyglycolide, polylactide, poldioxinones, polycaprolactones, absorbable glasses, gelatin, collagens, mono, and polysaccharides starches.

Component 2, a dispersing vehicle, may be esters of C₈-C₁₈ monohydric alcohols with C₂-C₆ aliphatic monocarboxylic acids; C₂-C₁₈ monohydric alcohols with polycarboxylic acids; C₈-C₃₀ monohydric alcohols; tocopherol and esters thereof with C₂-C₁₀ aliphatic monocarboxylic acids or polycarboxylic acids; absorbable 10-14C hydrocarbons; free carboxylic acids such as oleic, capric, and lauric; dialkyl ethers and ketones; alkyl aryl ethers and ketones, polyhydroxy compounds and esters and ethers thereof; (ethylene oxide/propylene oxide copolymers), oils e.g. olive oil, castor oil and triglycerides.

A protectant mixture for use in preserving biological materials comprising (1) at least one polyhydroxy compound, where the total amount of polyhydroxy compound in the mixture is from about 5% to about 60% by weight of the mixture where the mixture is an aqueous solution and is from about 10% to about 95% where the mixture is in solid form, and (2) phosphate ions, where the total amount of phosphate ions in the mixture is such that the molar ratio of phosphate ions to hydroxy groups in the polyhydroxy compound is from about 0.025 to about 0.625; a preservation medium comprising (1) a biological material, (2) at least one polyhydroxy compound, where the total amount of polyhydroxy compound in the medium is from about 5% to about 60% by weight of the medium, and (3) phosphate ions, where the total amount of phosphate ions in the mixture is such that the molar ratio of phosphate ions to hydroxy groups in the polyhydroxy compound is from about 0.025 to about 0.625; methods of preserving the preservation medium; and the resulting preserved biological material composition.

The invention discloses a high-flexibility melamino-formaldehyde foam material and a preparation method thereof. The preparation method comprises: firstly, preparing melamino-formaldehyde prepolymer modified by polyol into aqueous solution with definite weight concentration; weighting 100 parts by weight of prepolymer aqueous solution; adding 0-15 parts by weight of surfactant, 1-20 parts by weight of foaming agent, 0-10 parts by weight of accelerator and 0-10 parts by weight of curing agent to be fully stirred and mixed to prepare foaming liquid; filling foaming liquid into a microwave chemical reactor or a high-temperature oven; and foaming for 30s-15min at the temperature of 100-300 DEG C to prepare the foam material. The melamino-formaldehyde foam material disclosed by the invention solves the problems of big brittleness, poor flexibility, easy duslting of foam, complex preparation technology, high production cost and the like of the existing melamino-formaldehyde foam material and has wide application prospect.

The invention provides a process for the preparation of essential oil microcapsules comprising dissolving a di- or polyisocyanate into an essential oil, emulsifying the resulting mixture in an aqueous solution containing a di- or polyamine, and/or a di or polyhydroxy compound to effect encapsulation of said essential oil through interfacial polymerization, whereby there is formed a polyurea and/or polyurethane film around the essential oil droplets which film enhances the stability of said essential oil, reduces its evaporation rate and controls its release rate when applied to a substrate.

The invention discloses solvent free bi-component polyurethane adhesive and a preparation method thereof, wherein the solvent free bi-component polyurethane adhesive relates to a compound soft package adhesive in the fields of food, medicine, and the like. The adhesive comprises a component A and a component B, wherein the component A is an isocyanate compound, the component B is polyol, and the adhesive is obtained in such a way that the component A and the component B are mixed according to the weight percent of 2:1. The adhesive solves the problem that the use effect is influenced and the use range is limited because of poor properties of transparency, viscosity, low-temperature coating and stripping strength, and boiling resistance existing in the prior solvent free adhesive. The adhesive is environmental-friendly without solvent because the component A and the component B of the adhesive both are transparent liquid, has low viscosity as well as better low-temperature coating and stripping strength, and keeps better stripping strength after being boiled, thereby being environmental-friendly adhesive, wherein the viscosity of the component A is 2000-5000MPa.s and the viscosity of the component b is 400-2000MPa.s below 25 DEG C.

The present invention provides a formulation for a reactive dye layer for a limited-play optical storage medium, the reactive formulation including at least one carrier material or curable acrylate monomer, at least one reactive material disposed within the carrier material or acrylate monomer, and at least one photo-bleaching retarder material disposed within the at least one adhesive material. The at least one photo-bleaching retarder material includes at least one polymeric polyhydroxy compound selected from the group consisting of polyhydroxystyrenes, cellulose, and functionalized cellulose derivatives.

This invention provides methods for producing ethylene glycol from polyhydroxy compounds such as cellulose, starch, hemicellulose, glucose, sucrose, fructose, fructan, xylose and soluble xylooligosaccharides. The methods uses polyhydroxy compounds as the reactant, a composite catalyst having active components comprising one or more transition metals of Groups 8, 9, or 10, including iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium, and platinum, as well as tungsten oxide, tungsten sulfide, tungsten hydroxide, tungsten chloride, tungsten bronze oxide, tungsten acid, tungstate, metatungstate acid, metatungstate, paratungstate acid, paratungstate, peroxotungstic acid, pertungstate, heteropoly acid containing tungsten. Reacting at a temperature of 120-300° C. and a hydrogen pressure of 1-13 MPa under hydrothermal conditions to accomplish one-step catalytic conversion. It realizes efficient, highly selective, high yield preparation of ethylene glycol and propylene glycol from polyhydroxy compounds. The advantage of processes disclosed in this invention include renewable raw material and high atom economy. At the same time, compared with other technologies that converts biomass raw materials into polyols, methods disclosed herein enjoy advantages including simple reaction process, high yield of targeted products, as well as easy preparation and low cost for the catalysts.

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; and

wherein 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.

The invention provides a composite modification method for a phenolic resin adhesive. A mixture of organic silicon and (or) a polyhydric compound serves as a modifier in a synthetic process of phenolic resin. The composite modification method is technically characterized in that: the modifier is added in a prepolymerization reaction process or after the prepolymerization reaction; formaldehyde is added at one time under an alkaline condition; dehydration is not performed in the later period of the reaction; the whole process flow is simple and is easy to operate; the product has stable performance and does not pollute environment; and the content of free formaldehyde is low.

Two (or more), component, body-implantable, absorbable, biocompatible, putty-like surgical mechanical hemostatic tamponades for use in surgery. Component 1, a carboxylic acid salt bulking material preferably less than 50 micron, preferably the calcium, magnesium, zinc, aluminum, lithium or barium salts of saturated or unsaturated carboxylic acids containing about 6 to 22 carbon atoms.

Component 2, a dispersing vehicle, may be esters of C₈-C₁₈ monohydric alcohols with C₂-C₆ aliphatic monocarboxylic acids; C₂-C₁₈ monohydric alcohols with polycarboxylic acids; C₈-C₃₀ monohydric alcohols; tocopherol and esters thereof with C₂-C₁₀ aliphatic monocarboxylic acids or polycarboxylic acids; absorbable 10-14C hydrocarbons; free carboxylic acids such as oleic, linoleic, caprylic, capric, and lauric; dialkyl ethers; alkyl aryl ethers; dialkyl ketones and alkyl aryl ketones; polyhydroxy compounds and esters and ethers thereof; oils such as olive oil and castor oil and triglycerides.

Isocyanate-functional polyurethane prepolymers and aqueous dispersions therefrom which are useful for the production of flat materials having excellent resistance to alcoholic solvents are described. The prepolymers are prepared by reacting:

• • A) an isocyanate selected from the group consisting of
    • i) an aliphatic and/or a cycloaliphatic isocyanate,
    • ii) a mixture of an aromatic isocyanate and an aliphatic and/or a cycloaliphatic isocyanate,
  • B) a di- or polyhydroxy compound having a number average molecular weight of from 700 to about 16,000, and
  • C) optionally, a dihydroxy and/or polyhydroxyl compound having a number average molecular weight of less than 700, with the provisos that
    • a) at least one of components A), B or C) has a functionality of more than 2 and
    • b) if both component A) and component B) are difunctional, component C) cannot be a trihydroxy component of the formula:

R—(OH)₃

 where R is a saturated straight chain or branched chain aliphatic group of from 2 to 8 carbon atoms.

The invention discloses a method for preparing polyurethane elastomer modified by a carbon nano-tube. After acidification and acylchlorination at the surface, the carbon nano-tube reacts with polyhydroxy compound or oligomer to produce a carbon nano-tube with functionalized hydroxyls; one or more hydroxyls are connected to the surface of the functionalized carbon nano-tube through covalent bonds and have certain crosslinking and chain extension functions if being applied in the synthesis of polyurethane, thus greatly increasing the bonding force between the interfaces of the carbon nano-tube and the polyurethane base body, and meanwhile, the existence of hydroxyls improves the dispersibility of the carbon nano-tube in the polyurethane base body, which greatly improves the mechanical properties in all aspects of the functionalized carbon nano-tube/ polyurethane composite material as compared the original carbon nano-tube/ polyurethane composite material. Furthermore, the carbon nano-tube is capable of changing the dielectric property of the polyurethane composite material or even producing conductive polyurethane, thus enlarging the application range and field of polyurethane.

The invention provides a halogen free expansion flame retardant used for the flame retardation of photo-cured epoxide resin. The flame retardant consists of one or more of phosphorous compound which can generate phosphoric acid when being heated, polyol, nitrous compound and other auxiliaries; according to the 100 parts by weight of halogen free expansion flame retardant, the phosphorous compound which can generate phosphoric acid when being heated is 30 to 85 parts by weight, the polyol is 10 to 50 parts by weight, the nitrous compound is 5 to 35 parts by weight and other auxiliaries is 0 to 10 parts by weight. The invention provides a halogen free flame retardant photo-cured epoxide resin composition which has wide application range and low cost, achieves high-flame retardant effect and does not adopt an organophosphorous flame retardant.

The invention relates to hyperbranched polyester modified acrylic resin and a preparation method thereof. Firstly, a By-type polyhydroxylated compound is taken as nuclear molecules (wherein B represents hydroxyl, and the degree of functionality y of B is larger than of equal to 2), ABx-type polyhydroxy acid is taken as divergence molecules (wherein A represents carboxyl, B represents hydroxyl and x represents the degree of functionality of hydroxyl and is larger than or equal to 2), a polyester-type hyperbranched polymer with hydroxyl at the terminal is obtained through a vacuum fusion polycondensation method, and esterification reaction is performed on prepared hyperbranched polyester and acrylic resin with carboxyl in the presence of a water-carrying agent to obtain hyperbranched polyester modified acrylic resin. Acrylate with hyperbranched polyester introduced enriches a great amount of hydroxyl, and is taken as a cross-linking group to greatly reduce the curing time of a coating film; and at the same time, hyperbranched polyester has excellent performance of dendritic polymer, molecular chains are not easily twisted, and hyperbranched polyester modified acrylic resin with high solidity and low viscosity can be obtained. According to the invention, the source of raw materials is wide, the price of the raw materials is low, the synthetic method is simple, the controllability is good, and the production cost is low.