652results about How to "Good anti-adhesion" patented technology

The invention provides a heat-shrinkable multi-layer film comprising at least a thermoplastic resin layer as the outermost layer (A), a gas barrier resin layer as a core layer (B) and a sealing resin layer as the innermost layer (C), and optionally an adhesive layer between the individual layers, wherein (1) the sealing resin layer of the innermost layer (C) is a layer formed of a resin material (b) comprising a linear ethylene-1-octene copolymer (a) obtained by using a constrained geometry catalyst and having an 1-octene content not lower than 1 wt. % but lower than 20 wt. % and a density higher than 0.885 g/cm3 but not higher than 0.960 g/cm3, and (2) an intermediate layer (D1) formed of at least one resin (c) selected from the group consisting of polyamide resins, thermoplastic polyester resins and ethylene copolymer resins is provided between the outermost layer (A) and the core layer (B). The film has excellent sealing properties, clarity, mechanical strength, stretchability and bag-making property.

The invention discloses a preparation method and application of modified polyurethane aqueous dispersions of polyisocyanate curing agents. The preparation method comprises the following steps of: carrying out prepolymerization reaction by using polyester polyol, vulcabond monomer and a polyisocyanate curing agent; reacting with a hydrophilic chain-extending agent and a micro-molecule chain-extending agent to obtain polyurethane prepolymer containing hydrophilic groups (carboxyl or sulfonic groups) and isocyanate(NCO)-terminated groups; neutralizing the polymer into salt, and then dispersing the salt into water; and preparing the modified polyurethane aqueous dispersions of the polyisocyanate curing agents by the chain extending of a polyamine chain-extending agent. The modified polyurethane aqueous dispersions of the polyisocyanate curing agents have self-crosslinking function at room temperature, and the self-crosslinking density is over 85%. Compared with non-modified polyurethane aqueous dispersions prepared under the same condition, the modified polyurethane aqueous dispersions have superior film forming property, water resistance, alcohol resistance, pollution resistance, cold resistance, dry/wet rubbing resistance and chemical solvent resistance; and coating films have especially high drying speed, high hardness increment speed and high final hardness.

The invention relates to a method for preparing composite biological medical material used to avoid adhering organisms, wherein said film is formed by two layers; the layer used as base material is formed by degradable composite macromolecule polylactic acid, glycolic acid, or their copolymer, treated by static spin technique, to make film fiber into nanometer level; then coats one layer of degradable natural macromolecule chitose or relative derivant on the base film, to be treated to obtain the degradable composite biological medical film; and the invention can add different amounts of medical elasticizer between two layers to adjust the degrade speed. The invention can improve immunity with haemostasis function, etc.

The invention refers to a high-solid content acrylate micro-latex, its making method and its application to carpentry dope. It adopts the technique of half-continuous starvation feeding, and is obtained by the polymerizing method of seed latex. It leads into cross-linking groups in the course of polymerization such as amidogen, acetoacetyl and amido, depends on the reaction of the groups of form film, gets painting film with cross-linking construction, and improves the water and solvent resistance of the painting film.

The invention provides a medical anti-sticking membrane and a preparation method thereof. The anti-sticking membrane comprises a nanometer frame and hydrosol attached thereon. The hydrosol is internally packed with one or several kinds of styptic medicament or/and anti-sticking medicament. The invention also provides a preparation method of the anti-sticking membrane, comprising the following steps of: preparing electro-spinning solution, styptic medicament and/or anti-sticking medicament-containing hydrosol solution and crosslinker solution; receiving static spinning with the crosslinker solution to obtain the nanometer frame; printing the styptic medicament and/or anti-sticking medicament-containing hydrosol solution onto the nanometer frame by an ink-jet printer, and solidifying the hydrosol solution to obtain the anti-sticking membrane. The anti-sticking membrane has good capability and biological compatibility, and nontoxicity as well as nonirritant, can be completely degraded and absorbed, is compounded with controllably released styptic medicament or/and anti-sticking medicament, has controllable degrading time and speed, and conquers defects of the prior art.

The invention relates to a waterproof and moisture-permeable coating agent composition, wherein, a certain amount of microporous lignocellulose fine powder is added into the coating agent with waterproof function, so that the coating agent has moisture permeable performance. The waterproof and moisture-permeable coating agent composition which is used as the coating agent for non-woven fabric, knitted fabric or woven fabric can be made into coated fabric and synthetic leather with waterproof and moisture permeable performances. Compared with the prior at, the invention has the advantages that: 1. the raw material is easy to be added, the process is available with high adaptability, no need to add new equipment; 2. on the premise that the waterproof performance is not decreased, the amount of moisture permeated is increased obviously and the anti-adhesion is improved; 3. the coated fabric and superfine fiber and artificial cover synthetic leather made by the invention has the advantages of fine moisture permeability, high resistance to water pressure and that the physical performance does not decrease.

An organic siloxane modifier nano-class styrene-acrylate emulsion used for paint or adhesive is prepared from the functional silane monomer with multifunctional vinylalkoxy groups and the monmers of styrene, alkyl methylacrylate, hydroxyalkyl methylacrylate, alkyl acrylate and (methyl) acrylic acid through copolymerization in the manner that under the action of organic silaxane as hydrolysis inhibitor the emulsion polymerizing is inhibited. Its advantages are low content of emulsifier, high content of solid component and storage stability (more than one year), high resistance to weather, dirt, water, chemical solvent and alkali, and high adhesion and tension strength.

The invention relates to a medical nano-fiber sponge material, of which the porosity is 90-98 percent and the diameter of a nano-fiber is 50-1,000 nanometers. The medical nano-fiber sponge material consists of the following components in percentage by mass: 0.5-8.5 percent of bioactive glass fine particles, 65-88 percent of gelatin, 0.2-5.0 percent of hyaluronic acid, 0.2-5.0 percent of chitosan and the balance of water. A preparation method of the medical nano-fiber sponge material comprises the following steps of: adding bioactive glass fine particles and ethanol into a gelatin aqueous solution, and stirring uniformly; performing low-temperature phase separation and freeze drying to obtain nano-fiber sponge obtained by compounding gelatin and bioactive glass fine particles; and performing soaking, refrigerating and freeze drying with a hyaluronic acid solution and a chitosan solution in sequence under a negative pressure condition to obtain a porous composite sponge material in which nano-fibers are crosslinked and coated statically with hyaluronic acid and chitosan. The nano-fiber sponge has excellent bioactivity, bacteriostasis and mechanical property, and can be widely applied in the fields of regenerative repair of various skin wounds and skin tissue engineering.

Provided are: a separator for a secondary cell, the separator having good heat resistance, high adhesion to an electrode active material layer laminated on the collector, and high blocking resistance; and a secondary cell having the separator for a secondary cell. This separator for a secondary cell has an organic separator layer, a heat resistance layer formed adjacent to at least one surface of the organic separator layer, and an adhesive layer formed on the heat resistance layer, the heat resistance layer containing non-conductive particles and a binder, and the adhesive layer including a particulate polymer having a glass transition temperature (Tg) of 10 to 100 DEG C.

A toner is provided that comprises a colorant and a binder resin, wherein the binder resin comprises a polyester resin that is prepared by a polycondensation reaction in the presence of at least a titanium-containing catalyst expressed by General Formula (II) or (II), the toner has a volume average particle diameter of 2.0 μm to 10.0 μm and a ratio Dv/Dn within a range of 1.00 to 1.40, in which Dv represents a volume average particle diameter and Dn represents a number average particle diameter,

Ti(—X)m(-OH)n  General Formula (I)

O═Ti(—X)p(-OR)q  General Formula (II)

• • in General Formulas (I) and (II), X represents a residue of a mono-alkanolamine of 2 to 12 carbon atoms or a polyalkanolamine from which a hydrogen atom of one hydroxyl group is removed; other hydroxyl group(s) and still other hydroxyl group(s), within the polyalkanolamine molecule that has a directly bonding Ti atom, may polycondense to form a ring structure; other hydroxyl group(s) and still other hydroxyl group(s) may polycondense intermolecularly to form a repeating structure; and the polymerization degree is 2 to 5 in a case of forming the repeating structure; R represents one of a hydrogen atom and alkyl groups of 1 to 8 carbon atoms that may have 1 to 3 ether bonds; “m” is an integer of 1 to 4; “n” is an integer of 0 to 3; the sum of “m” and “n” is 4; “p” is an integer of 1 or 2; “q” is an integer of 0 or 1; the sum of “p” and “q” is 2; and in a case that “m” and “p” is 2 or more, the respective Xs may be identical or different each other.

Provided is a toner binder that is excellent in heat resistant storage properties and hot offset resistance properties and also affords excellent anti-blocking properties of paper when printing continuously. The present invention is directed to a toner binder comprising a crystalline resin (A), wherein the crystalline resin (A) comprises two or more crystalline resins (a) and the endothermic peak temperature group that is composed of all of the endothermic peak temperatures of the respective two or more crystalline resins (a) has two or more different endothermic peak temperatures; and a resin particle containing the toner binder.

The invention discloses a polylactic acid-based composite material surgical medical film and a preparation method thereof. By adopting electrostatic spinning equipment and exploring proper technological parameters, different types of polylactic acid-based composite material macromolecular fiber thin films are finally formed and are applied to the field of biomedicine. In addition, by regulating and controlling composition of a macromolecular composite material system and thickness of an electro-spinning thin film, the surgical medical film which has good flexibility, high tensile strength, controllable degradation rate as well as excellent waterproof, antibacterial and air permeable performances is obtained finally. The surgical medical film is applicable to the field of various biomedicines such as healing film, wound surface dressing and anti-adhesion medicine; the medical film not only can be better adhered to tissues and avoid biotoxicity, but also can effectively promote transmission functions of blood, nutrients and growth factors in a human body due to the nature of semipermeable membrane. The process of the invention is simple and environment-friendly; the preparation method is easy to operate, low in cost, applicable to large-scale production and good in controllability, and is expected to be widely applied to various medical fields.

Branched monofunctional polysiloxanes are disclosed having the general formula:

X-(D_a)-(D_bT_c),

wherein X-(D_a) is a linear moiety and (D_bT_c) is a branched moiety; X a substituted or unsubstituted, monovalent or divalent hydrocarbon having a functional group;

R⁵ and R⁶ are independently halogenated or unhalogenated monovalent hydrocarbon or substituted or unsubstituted divalent hydrocarbon;

T is (R⁷)_dSiO_(4-d)/2

R⁷ is a substituted or unsubstituted monovalent hydrocarbon; wherein the branched polysiloxane is end-capped by

R⁸ is a substituted or unsubstituted monovalent hydrocarbon; a is 1 to 300, b is 25 to 5000, c is 1 to 100, d is 0 or 1; and T_c is randomly distributed in the branched polysiloxane. Additionally, processes for preparing such polysiloxanes, and coating compositions comprising the same is provided. A fuser member and substrate comprising a branched monofunctional polysiloxane of the above formula are also disclosed.

The invention relates to a polypropylene/polyvinylidene fluoride composite hernia patch and a preparation method thereof. The composite hernia patch has a bilayer structure, wherein the bottom layer is a plasma modified polypropylene braid and the surface layer is a polyvinylidene fluoride electrospinning film. The preparation method comprises the following steps: (1) dissolving polyvinylidene fluoride in the mixed solution of dimethylformamide and acetone to prepare polyvinylidene fluoride solution; (2) performing plasma modification to the polypropylene fiber braid; (3) adopting the electrospinning method to spray the polyvinylidene fluoride solution on the modified polypropylene fiber braid; and (4) shaping the composite fabric and drying. The hernia patch of the invention has stable structure and good mechanical properties and biocompatibility; by utilizing the good anti-adhesion property of polyvinylidene fluoride, the problem that the polypropylene hernia patch prepared from a single material is easy to be adhered with intestinal tissues can be overcome; and the preparation method is simple and is suitable for industrial production.

The invention discloses matte transparent finish paint for the surface of wooden ware which is used for family decorates and furniture production. The formula and mixture ratio are that self-cross linking acrylic resin is 75-85, polysiloxane antifoaming agent is 0.3-0.6, organic silicon flatting and slipping agent is 0.3-0.6, polyether modified wetting agent is 0.3-0.5, macromolecular dispersant is 0.3-0.5, silica matting agent is 1.5-3, Dipropylene Glycol Methyl Ether is 5-8, propyleneglycol monobutyl ether is 5-8, polyurethane associated rheological additives are 1-3, and water is 4-6. The invention is characterized by 1, good chemical resistance, 2, excellent blocking resistance, 3, good sanding ability, 4, high hardness, 5, good waterproof property, 6, excellent fullness and hand feeling.

The invention discloses water-soluble copolyester and a preparation method thereof. Caprolactone, dicarboxylic acid or ester thereof, m-benzene sulfonate and dihydric alcohol are adopted as raw materials, and the method comprises the following steps of: raising the temperature to catalyze quick ring opening; and raising the temperature for esterification and polycondensation. The polyester resin has good water solubility and better adhesion; and when used for textile sizing, the polyester resin can well adhere to hairs to greatly reduce the end breakage of warp yarns in the weaving process; therefore, the production efficiency and the quality of textiles are improved.

The invention discloses an ultraviolet cross-linked organosilicone modified acrylate copolymer emulsion which belongs to the field of high-molecular compounds. The ultraviolet cross-linked organosilicone modified acrylate copolymer emulsion is formed by constitutional repeating units and is a modified acrylate copolymer with a side chain containing an ultraviolet active group and an alkoxy siloxane group. The ultraviolet cross-linked organosilicone modified acrylate copolymer emulsion is obtained through the copolymerization reaction of an ultraviolet active single-functionality degree monomer, an alkoxy siloxane single-functionality degree monomer and a third single-functionality degree monomer. According to the ultraviolet cross-linked organosilicone modified acrylate copolymer emulsion, the side chain of the copolymer contains the ultraviolet active group and the alkoxy siloxane group, double crosslinking is realized, i.e. ultraviolet self-crosslinking and organosilicone self-crosslinking, and a high elastic material with good flexibility is formed, has high surface smoothness, strong contamination resistance, excellent adhesion resistance and no residual small molecules.

A powdery linear polymer having a narrow particle size distribution with little dusting and excellent in anti-blocking property is recovered from a latex of a linear polymer containing a large proportion (35-75 wt. %) of soft polymer (S) component through a two-step coagulation process including a first (moderate coagulation) step causing 70-98 wt. % of the coagulation. The linear polymer in the latex has a multilayer structure comprising a linear polymer (S) having a glass transition temperature below 40° C. and a linear polymer (H) having a higher glass transition temperature disposed in totally at least two layers and containing 35-75 wt. %, as a whole, of the linear polymer (S) with the proviso that the linear polymer (S) cannot be contained in excess of 30 wt. % in an outermost layer of the multilayer structure.

The invention relates to an organosilicon-modified acrylate emulsion and a preparation method of a coating agent for powder-free gloves. The preparation method comprises the following steps of: preparing the organosilicone-modified acrylate emulsion; adding the organosilicon-modified acrylate emulsion into a stirred tank; adding a wetting agent for base materials, a germicide and deionized water under constant mixing; then adding a foam killer, a thickening agent, a pH value conditioner after evenly mixing; and discharging after evenly mixing. The solid content of the coating agent of the organosilicon-modified acrylate emulsion is between 10% and 30%; the surface tension is not more than 35mN/m; and the viscosity is between 100 mPa.s and 1000mPa.s; and the pH value is between 7 and 9. The coating agent is diluted with the deionized water according to a rate of 1:19, is leached by a hand model coated with a disposable glove and then is dried at the temperature between 100 DEG C and 150 DEG C. Finally the powder-free gloves processed by the coating agent are formed after demolding.

The invention discloses a preparation method of a medical hemostatic occlusion dressing. The preparation method comprises the following steps: (1), taking and pouring deionized water into a reactor, heating the reactor, slowly adding lemon peel pectin and gelatin, and mechanically stirring at the same time; (2), after the addition of the lemon peel pectin and gelatin, stirring continuously, then adding other components into the reactor, and carrying out mechanical stirring uniformly at the same time; (3), after the mixing of the materials, cooling hydrogel to be at a room temperature, so as to obtain the medical hemostatic occlusion dressing. The medical hemostatic occlusion dressing prepared through the method provided by the invention is high in bleeding stopping speed, has auxiliary functions of promoting wound surface healing, preventing adhesion and the like, is also better in biomechanics and air permeability, and has an important clinical application value; the preparation method provided by the invention has the advantages that the process is simple, requirements for equipment are relaxed, raw materials are low in cost and readily available, the cost is low, and industrialization is easy to realize.

The invention relates to a surface antifouling corrosion-resistant protectant for glass fiber reinforced plastic and other polymer products. The surface antifouling corrosion resistant protectant for glass fiber reinforced plastic and other polymer products, which is provided by the invention, is composed of fluoro-alkyl silane, long-chain alkyl silane, nanometer SiO2, alkyl silicate, alcohol, inorganic acid catalysts and de-ionized water or distilled water. The surface antifouling corrosion resistant protectant for glass fiber reinforced plastic and other polymer products, which is provided by the invention, can form a layer of low surface water-repellent, oil-proof, antifouling, anti-sticking, anti-ultraviolet and corrosion-resistant coat film on the surfaces of the glass fiber reinforced plastic and the other polymer products, the water contact angle can reach as high as 149 DEG, the purposes of effective reduction of rain accumulation as well as the attachment of atmospheric dust, guano, etc. on the surfaces of the glass fiber reinforced plastic and the other polymer products, acid rain corrosion damage resistance, salt mist corrosion damage resistance, ultraviolet corrosion damage resistance and reduction of use and maintenance cost are achieved.