111 results about "Cohesive energy" patented technology

A method for modifying glassy surfaces including: producing nanoparticles; depositing the said nanoparticles on a surface; providing energy to the particles and/or surface so that the nanoparticles are at least partly diffused/dissolved into the glassy surface; and reducing the cohesive energy of the nanoparticles during the production of the nanoparticles or after the production of the nanoparticles.

The invention discloses a preparation method of waterborne resin and a water-based paint composite. The waterborne resin prepared with the preparation method of the invention contains various functional groups, such as a polyester group, a polypropylene resin group, an organic siloxane group, a polyurethane group and the like, and is acrylic ester graft modified polyester-type polyurethane water dispersion containing siloxane structure, and the siloxane structure can be hydrolyzed to form inorganic-organic crosslinking structure so as to improve the water resistance and the abrasive resistance of waterborne resin. The acrylic acid functional group structure improves the gloss and the weather fastness of a paint film; meanwhile, the polyester-type polyurethane structure ensures high hardness of the paint film because of larger cohesive energy. The water-based paint composite takes the waterborne resin as the main material for forming films, does not contain toxic and harmful substances of toluene and dimethylbenzene, has excellent gloss, good abrasive resistance, and excellent waterproof property and anti-ageing property and is an environmentally-friendly water-based paint with excellent comprehensive performance.

The invention discloses a modified starch adhesive and a method for preparing the same. The modified starch adhesive comprises the following components by weight: 30-50 parts of corn starch, 80-120 parts of deionized water, 25-40 parts of sodium hypochlorite solution, 0.5-2 parts of epichlorohydrin, 30-70 parts of polyvinyl acetate emulsion, 10-30 parts of epoxy resin, 2-7 parts of tertiary amine catalyst, 5-15 parts of filler, 0.2-1 part of surfactant, and 0.2-0.6 part of preservative, wherein the sodium hypochlorite solution serves as the oxidant, the polyvinyl acetate emulsion serves as the high-cohesive-energy reinforcement component, and the epoxy resin servers as the water-tolerant modified component. The method for preparing the modified starch adhesive comprises the following steps: mixing the oxidized starch emulsion prepared in advance, the polyvinyl acetate emulsion and the epoxy resin according to proportion uniformly, adding the catalyst, the filler and the preservative, and stirring quickly and uniformly. The modified starch adhesive disclosed by the invention has the advantages of high shear strength, high water-tolerant shear strength, moderate viscosity, good liquidity, moderate primary drying time, low cost and excellent integrated performance.

The invention discloses a wet polyurethane resin with high flexing resistance, high wear resistance and high peeling strength, and a preparation method thereof. During a synthetic process of the polyurethane (PU) resin, proper soft polyurethane segment and hard polyurethane segment materials and a brand-new synthesis process route by quasi prepolymerization are selected to prepare the wet polyurethane resin based on fully considering effect of separate soft and hard segment structure, crystallinity and intermolecular cohesive energy density distribution of the PU resin on aggregation structure relationship formed by coagulation of PU resin solution in dimethylformamide (DMF) aqueous solution. The wet PU resin with high flexing resistance, high wear resistance and high peeling strength fully solves the defect that the existing common PU resin can not reach three performance indexes which are high flexing, high wear resistance, high peeling strength at the same time. Synthetic leather made from the wet PU resin with high flexing resistance, high wear resistance and high peeling strength can meet three performance indexes of high flexing resistance, high wear resistance, high peeling strength at the same time, and can greatly improve durability of shoes products.

Disclosed is a heat-fusible electrostatic image developing toner which has an excellent balance between fixability at low temperatures and grindability and is excellent in glossiness after fixation. Also disclosed is a resin for toners. A polyester resin for toners which is obtained by polycondensing a polyol component and a polycarboxylic acid component is characterized by containing 20-100 weight% of one or more polyester resins (A1) having a storage elastic modulus from 2.5 x 10<3> Pa to 5 x 10<6> Pa at 150 1/2 C wherein the molar average cohesive energy of the polyol component is between 7.0 x 10<4> and 1.4 x 10<5> J.

There is provided a lubricating oil composition for continuously variable transmission which is capable of enhancing a power transmission capacity of CVTs of various type including a metallic belt type, a chain type and a traction drive type, and keeping the enhanced power transmission capacity. The lubricating oil composition for continuously variable transmission according to the present invention includes (A) a base oil comprising a hydrocarbon compound having a cohesive energy density at 40° C. of 0.180 GPa or more, and having a kinematic viscosity at 40° C. of 5 to 150 mm²/s, and (B) a phosphoric ester containing a alkyl group having a thioether bond, and/or (C) at least one compound selected from the group consisting of phosphoric esters and amine salts thereof, and an overbased calcium sulfonate.

The invention discloses adhesive for light-reflecting particles and a preparation method thereof, which belongs to the technical field of adhesive preparation. The adhesive comprises a component A and a component B which are mixed in a weight ratio of 100:5-9, wherein the component A comprises the following raw materials in percentage by mass: 30 to 55 percent of acrylate soft monomer, 0.2 to 5 percent of functional monomer containing carboxyl or hydroxyl groups, 0.5 to 10 percent of crosslinking monomer containing hydroxyl groups, 40 to 60 percent of non-alcohol solvent, 0.2 to 5 percent of oil-soluble initiator and 0.05 to 0.2 percent of thiol chain transfer agent; and the component B adopts low-molecular polymer with the content of NCO between 10 and 14 percent. The crosslinking monomer containing hydroxyl groups in the component A of the adhesive undergoes crosslinking reaction with NCO in the component B to increase the cohesive energy and polarity of an adhesive system, thereby increasing the adhesive bonding action of the system on base materials and inorganic light-reflecting particles.

The invention discloses a dispersing type anti-agglomeration polyurethane coating. Firstly, a castor oil crosslinking prepolymer is adopted, wherein a multifunctional group structure of castor oil can endow a polymer with certain crosslinking, accordingly, the crosslinking degree of the polymer is improved, the interaction force of molecular chains is increased, movement of the molecular chains is blocked, water molecules cannot easily enter the molecular chains to swell the polymer, and the water absorption of the coating is reduced; meanwhile, the castor oil is triglycerin of fatty acid, nonpolar fatty acid chains of medium-long chains in molecules of the castor oil enable the coating to have excellent hydrophobicity, and the water absorption is further reduced; besides, ester in the castor oil has higher cohesive energy and can improve the tensile strength of the coating; ethyl cellulose has better heat resistance and thermoplasticity and has good compatibility with polyurethane, and the comprehensive performance of the prepolymer can be improved; the polyurethane prepolymer and polysilsesquioxane are subjected to blending modification.

The present invention relates to fiber-reinforced thermoplastic resin composition comprising 0.1 to 10 mass % of a (meth)acrylic-based polymer, 1 to 70 mass % of reinforcing fiber, and 20 to 98.9 mass % of thermoplastic resin, wherein the (meth)acrylic-based polymer has, in a side chain, at least one functional group selected from a hydroxyl group, a carboxyl group, an amide group, and an urea group, and has a cohesive energy density (CED) of 385 to 550 MPa. The present invention provides, particularly in the case of using a polyolefin-based resin as matrix resin, a fiber-reinforced thermoplastic resin composition and a reinforcing fiber bundle which have high adhesiveness and good mechanical characteristics.

The invention discloses a preparation method and a use of a moisture-curable polyurethane hot melt adhesive for special-shaped material coating. The preparation method comprises that a NCO functional group and air or vapor on the base surface undergo a reaction to produce an amido group and simultaneously release CO2, the amido group and other NCO group undergo a reaction to produce a structure with a urea functional group, and reactive hydrogen in the urea structure and unreacted NCO groups undergo further reaction to produce a biuret structure so that a crosslinking reaction is finished, wherein in the reaction, through detection of isocyanate group NCO%, a reaction degree is monitored. The preparation method is free of a solvent and thus a drying process is avoided, processes are simplified and a production cost is reduced. The moisture-curable polyurethane hot melt adhesive obtained by the preparation method has high cohesive energy, good initial adhesion, and excellent heat, water and weather resistance after curing, and is especially suitable for coating of outdoor door and window section bars.

Provided is a polypropylene carbonate based resin composition used as a hot melt adhesive. In detail, the present invention is to provide a composition of the hot melt adhesive having high adhesion to a polar surface of the polypropylene carbonate resin based hot melt adhesive and adhesion to a non-polar surface. The composition of hot melt adhesive according to the present invention has excellent compatibility between raw materials so as to have a completely uniform phase, thereby increasing cohesive energy as the adhesive and having the excellent adhesion to the polar or non-polar surface.

A functional block copolymer useful as a compatibilizing agent for a blend of a condensation polymer and vinyl polymer comprises segments of a condensation polymer and a vinyl polymer derived from a reactive functional group-containing monomer or a functions-imparting monomer such as ultraviolet absorption or flame retardant functions. The block copolymer can further include a segment of a lower cohesive energy polymer. The condensation or vinyl polymer segment, or the lower cohesive energy polymer segment contains azo or peroxide groups which act as a polymerization initiator for the copolymerization of the vinyl monomer forming the vinyl polymer segment.

A resist for printing that is coated on a printing roll and is then sequentially transcribed on a printing plate and a substrate including: a material wherein a cohesive energy between the resist and the printing plate is larger than a cohesive energy between the resist and a blanket formed on the surface of printing roll, and wherein a cohesive energy between the resist and the substrate is larger than the cohesive energy between the resist and the blanket formed on the surface of printing roll.

The invention discloses a polyurethane coupling agent used for synthesizing polyurethane-containing groups and long-chain fatty alcohols. The main chain of the polyurethane coupling agent contains a carbamate group, an isocyanate group and long-carbon chain fatty acid, has the characteristics of possessing of the large polarity of an ester group and an isocyanate group, high cohesive energy, large intermolecular action force, high activity and polarity, excellent chemical bonding force with nanometer calcium carbonate, possessing of the flexibility and the elasticity of the long-chain fatty acid, and increase of the nanometer calcium carbonate filler and substrate silicone adhesive resin interface combination force. Compared with common fatty acid surface-treated calcium carbonate surface, nanometer calcium carbonate treated with the polyurethane modifier has the advantages of increase of the tensile strength, the elongation at break and the elastic modulus, good mechanical performances and wide application prospect when applied to plastics, rubbers and sealants.

The invention disclose a preparation method and application of moisture reaction type polyurethane hot-melt adhesive for a composite floor and belongs to the technical field of macromolecule material preparation .According to the method, polyester polyol, diisocyanate and chain extender are adopted as basic raw materials, auxiliary agents such as accelerant, a flatting agent and a nucleating agent are combined, and a high temperature polymerization reaction is conducted, so that the moisture reaction type polyurethane hot-melt adhesive (PUR) is obtained .A product prepared through the method is the one-component moisture reaction type polyurethane hot-melt adhesive, no cross-linking agent is used for hardening, and instead, an NCO functional group with the resin molecular chain tail end reactive is adopted for reacting with moisture to achieve cross-linking .The solid content of the product is 100%, no solvent is contained, no solvent is used in the technological process, a baking channel does not need to be arranged, cost is lowered, and no safety or environmental protection problem exists .In addition, the polyurethane adhesive product produced through the method is high in cohesive energy, good in initial adhesion and excellent in heat resistance, weather resistance, hydrolysis resistance and aging resistance after being cured and can be widely applied to processing of building decorative materials.

The invention discloses a method for testing dynamic surface energy parameters of an asphalt material. The method comprises the following steps: selecting four chemical reagent with known surface energy parameters, and respectively dropwise adding the four chemical reagents on the surface of an asphalt membrane; recording an advancing contact angle and a receding contact angle at the moment nearby a limit which tends to slide but is in a static state; solving cohesive energy of the asphalt in an advancing and receding process, and solving adhesional energy of the asphalt and aggregates in the advancing and receding process by combining with surface energy parameters of the aggregates; evaluating the healing performance and the water stability of an asphalt mixture by using the surface energy in the advancing process, evaluating the cracking performance of the asphalt mixture by using the surface energy in the receding process, quantizing the adhesion performance, and preferring a road material. The dynamic surface energy parameters of the asphalt are tested by adopting a static drop tilting method provided by the invention, and are enabled to correspond to healing and cracking performances and the water stability of the asphalt mixture; the method disclosed by the invention has certain advantages compared with an existing test method in aspects of reasonability and error control of a testing method and test operations.

The invention discloses an antibacterial and anticorrosive coating. Firstly, a castor oil is used for cross-linking a prepolymer: the multifunctional-group structure in the castor oil can cross-link a polymer to a certain extent, the cross-linking degree of the polymer is increased, the interaction force among molecular chains is increased, molecular chain movement is hindered, water molecules cannot enter the molecular chains to swell the polymer, and the water absorption of an adhesive film is reduced; meanwhile, the castor oil is a triglyceride of fatty acid, due to long nonpolar fatty acid chains in molecules, the adhesive film has good hydrophobicity, and the water absorption is further reduced; meanwhile, ester groups in the castor oil have higher cohesive energy and can improve the tensile strength of the adhesive film; ethyl cellulose has better heat resistance and thermal plasticity, has good compatibility with PU and can improve the comprehensive property of the prepolymer; then the PU prepolymer is mixed with polysilsesquioxane for modification.

The invention discloses a frosting coating. Firstly, a castor oil is used for cross-linking a prepolymer: the multifunctional-group structure in the castor oil can cross-link a polymer to a certain extent, the cross-linking degree of the polymer is increased, the interaction force among molecular chains is increased, molecular chain movement is resisted, water molecules cannot enter the molecular chains to swell the polymer, and the water absorption of an adhesive film is decreased; meanwhile, the castor oil is a triglyceride of fatty acid, due to long nonpolar fatty acid chains in molecules, the adhesive film has good hydrophobicity, and the water absorption is further reduced; meanwhile, ester groups in the castor oil have higher cohesive energy and can improve the tensile strength of the adhesive film; ethyl cellulose has better heat resistance and thermal plasticity, has good compatibility with polyurethane and can improve the comprehensive property of the prepolymer; then the polyurethane prepolymer is mixed with polysilsesquioxane for modification.

The present invention provides a method for producing an optical interference pigment, said method being characterized by comprising a step of hardening the alignment state of a polymerizable liquid crystal compound to produce a film having a fixed cholesteric liquid crystal structure, a step of crushing the film having a cholesteric liquid crystal structure to produce optical interference particles, and a step of washing the optical interference particles at a temperature of 35˚C or higher using at least an organic solvent having an SP value of 8.5 to 12 (cal/cm3)1/2, wherein the SP value represents a solubility parameter (δ) as measured by a Hoy method and is represented by formula (1): δ = (ΔE/V)1/2 (wherein V represents the molar molecular volume of the solvent; and ΔE represents a cohesive energy). The production method enables the provision of an optical interference pigment that has good light reflection performance at a selective reflection wavelength when being dispersed in a dispersion medium.

The invention relates to wound healing promoting gel and a preparation method thereof. The wound healing promoting gel is prepared by forming a gel matrix by oxidized alginate and diamine or diamidogen matters through a cross-linking reaction and compounding the following components in parts by weight: 5 to 10 parts of carbomer, 10 to 20 parts of isomalto-oligosaccharide, 0.1 to 10 parts of a wound healing promoting drug, 5 to 20 parts of a skin penetration enhancer and 40 to 70 parts of purified water. According to the wound healing promoting gel disclosed by the invention, after alginate is partially oxidized by sodium periodate which is subjected to a specific technology, carboxyl active genes in alginic acid can be activated, occurrence of the cross-linking reaction can be quickened, and the production efficiency of the gel is increased; alginate gel prepared by the invention has higher cohesive energy, is easy to form and not easy to crack, can be suitable for wounds in any parts, and is also capable of inhibiting reproduction of in-vivo harmful bacteria and generation of poisonous corrupt matters, expressing the effects of stopping bleeding, resisting bacteria, clearing wounds and promoting wound healing, and greatly shortening the healing time of the wounds.