921 results about "Extender" patented technology

A composition for a Coating System (paint) which forms an insulating material being designed to both reflect infrared radiation and have reduced thermal conductivity. The coating system may be either a single Thermal Coating or may be a Thermal Coating used in combination with a Thermal Primer. The Thermal Coating is formulated using conventional techniques and a resin used in paint manufacture, but utilizes primary pigments and extender mineral pigments which preferentially reflect in the infra red area of the solar spectrum. A method of characterizing particulate materials for their infra red reflectivity is described, which provides a means for preferential selection of particulate additives based on their relative visible light and infrared reflectivity. Additionally the incorporation of hollow micro-spheres is desired to reduce thermal conductivity. The Thermal Primer is designed to provide adhesion between the Thermal Coating and the substrate on which it is applied and uses conventional techniques to achieve those properties. However it has been found advantageous to incorporate hollow micro-spheres with low thermal conductivity, such as glass, ceramic or polymeric micro-spheres and/or an extender pigment with low thermal conductivity such as calcined clay to further reduce heat flow through the Coating System.

A method of forming a three-dimensional object of polyurethane, polyurea, or copolymer thereof is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable liquid including at least one of: (i) a blocked or reactive blocked prepolymer, (ii) a blocked or reactive blocked diisocyanate, or (iii) a blocked or reactive blocked diisocyanate chain extender; (c) irradiating the build region with light through the optically transparent member to form a solid blocked polymer scaffold and advancing the carrier away from the build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, the three-dimensional object, with the intermediate containing the chain extender; and then (d) heating or microwave irradiating the three-dimensional intermediate sufficiently to form from the three-dimensional intermediate the three-dimensional object of polyurethane, polyurea, or copolymer thereof.

The invention discloses a dynamic bond-containing polyurethane material for 3D printing and its preparation method and use. The preparation method utilizes, by mole, 100 parts of diisocyanate, 50-75 parts of polyester polyol or polyether polyol, 50-125 parts of a Diels-Alder bond-containing dihydric alcohol chain extender, 0-50 parts of a diisocyanate trimer cross-linking agent, 50-100 parts of a ligand-containing dihydric alcohol chain extender and 0-50 parts of a metal salt cross-linking agent. The Diels-Alder bond-containing dihydric alcohol chain extender and the diisocyanate trimer cross-linking agent are matched and are used for preparation of a Diels-Alder bond-containing polyurethane material. The ligand-containing dihydric alcohol chain extender and the metal salt cross-linking agent are matched and are used for preparation of a metal ligand-containing polyurethane material. Molecular structures of the prepared polyurethane materials contain a dynamic medical bond Diels-Alder bond and a metal ligand bond. The Diels-Alder bond-containing or metal ligand-containing polyurethane material has functions of self-restoration and self-bonding.

The invention relates to a method for preparing a high solid content latent cured polyurethane acrylic acid heterozygous latex and an application thereof. The preparation method comprises the following steps: pre-polymerizing polyester polyalcohol, hydrophilic chain extender and diisocyanate monomer to obtain the polyurethane prepolymer containing a hydrophilic group (carboxyl or sulfo group) and a terminal NCO group; then, neutralizing the polymer into salt and dispersing the salt in water to prepare the polyurethane water dispersoid; finally, using the dispersoid as macro molecular emulsifying agent and reactant to emulsify and disperse the acrylic ester monomer, initiating the polymerization by heating, dropping initiator to perform the latex polymerization, and regulating the pH of the latex by adding a latent curing agent to obtain the high solid content latent cured polyurethane acrylic acid heterozygous latex. The high solid content latent cured polyurethane acrylic acid heterozygous latex has a solid content of above 45%; the storage of the high solid content latent cured polyurethane acrylic acid heterozygous latex is stable; and high hardness film coating can be formed at the room temperature. Compared with acrylic acid latex and polyurethane latex, the high solid content latent cured polyurethane acrylic acid heterozygous latex has better film forming performance, water resistance, alcohol resistance, pollution resistance, dry/wet cleaning resistance and chemical solvent resistance, as well as high hardness.

The invention discloses closed type ultraviolet light solidifying waterborne polyurethane resin and a method for preparing the same. The polyurethane resin and the method are characterized in that the double bond of acrylic ester is introduced to the side chain of the polyurethane by utilizing a chain extender mode, and an end NCO group is sealed and protected by a sealer; and the side chain of a molecular chain of the obtained product has the double bond of an acrylic ester group, wherein the double bond is capable of ultraviolet light solidifying, and the end of a molecular main chain of the product has an unsealable sealer group. The polyurethane resin has the advantages of good storage stability and high hardness after solidification, and further improves the solidifying degree and the adhesive force of a solidifying film and is applied to the coating of workpiece shadow areas, thicker coatings and three-dimensional parts which are hard to penetrate by ultraviolet light. Because the resin coating film is subjected to triple solidification of natural drying solidification, ultraviolet solidification and unsealing-hot solidification, the resin coating film has the advantages of high solidifying degree, high hardness and high adhesive force of base materials. The product of the invention is obviously environmental friendly, and can be widely applied in fields of thick coatings of various base materials and an adhesive.

Low-friction fluorinated coatings are disclosed herein. A preferred low-friction material contains a low-surface-energy fluoropolymer having a surface energy between about 5 mJ/m² to about 50 mJ/m², and a hygroscopic material that is covalently connected to the fluoropolymer in a triblock copolymer, such as PEG-PFPE-PEG. The material forms a lubricating surface layer in the presence of humidity. An exemplary copolymer comprises fluoropolymers with average molecular weight from 500 g/mol to 20,000 g/mol, wherein the fluoropolymers are (α,ω)-hydroxyl-terminated and/or (α,ω)-amine-terminated, and wherein the fluoropolymers are present in the triblock structure T-(CH₂—CH₂—O)—CH₂—CF₂—O—(CF₂—CF₂—O)_m(CF₂—O)_n—CF₂—CH₂—(O—CH₂—CH₂)_p-T where T is a hydroxyl or amine terminal group, p=1 to 50, m=1 to 100, and n=1 to 100. The copolymer also contains isocyanate species and polyol or polyamine chain extenders or crosslinkers possessing a functionality of preferably 3 or greater. These durable, solvent-resistant, and transparent coatings reduce insect debris following impact.

The invention relates to a two component spray polyurea waterproof paint and a preparation method and a construction method of the same. The waterproof paint comprises a component A and a component B, wherein by weight portion, the raw material system of the component A comprises 40 to 60 portions of polyisocyanates, 30 to 45 portions of polyether polyols, 5 to 15 portions of hydroxy silicone oil; and the raw material system of the component B comprises 35 to 60 portions of amino terminated polyethers, 20 to 45 portions of amine chain extenders and 5 to 20 portions of amino silicone oil. Waterproof materials made of the waterproof paint have the combined high performance of a polyurea elastomer and an organosilicon material, high overall physical properties, excellent color retention and ultraviolet radiation resistance, can be used in waterproofing work exposed in atmospheric environment, and are particularly applicable to waterproof coatings of roads and bridges on a passenger special line. The preparation method of the waterproof paint has the advantages of simple process and environmental protection. The construction method of the waterproof paint can allow the paint to moisten and penetrate into substrate materials effectively from the surfaces of the substrate materials, so that the waterproof coatings have better appearance.

A fire-resisting and spraying type of polyurethane elastomer consists of A composition being semi-prepolymer prepared from low functional degree of polyisocyanic acid ester and polyether-polyalcohol as well as B composition prepared from amine chain extender, fire resisting polyether and end azyl polyether. The application method includes mixing the two compositions uniformly, sending the mixture to spraying gun by material conveying tube, increasing pressure to spray mixture on object surface for forming fire resisting type of sprayed polyurethane and polyether elastomer material instantly.

The invention relates to a 3D printing material and a preparation method thereof, and in particular, relates to a composite material for 3D printing and a preparation method thereof. Specifically, the invention provides a composition comprising: 1) a polyester copolymer prepared by copolymerizing the following components: i) substituted or unsubstituted aliphatic or alicyclic polybasic acid, ii) substituted or unsubstituted aliphatic or alicyclic polyol, and iii) substituted or unsubstituted aromatic polybasic acid; 2) a chain extender; and 3) inorganic particles.

Disclosed is a tie coat which is formed on a surface of a base or an undercoating film prior to formation of an organopolysiloxane-based antifouling coating film and is formed from a moisture-curing organopolysiloxane-based composition comprising (b1) organopolysiloxane having condensing functional groups at both ends of a molecule and/or (b2) a curing composition formed by subjecting the component (b1) and an extender pigment selected from the group consisting of silica, calcium carbonate, talc, mica, clay, kaolin and barium sulfate to contact treatment with heating or without heating. Also disclosed is a composite coating film wherein on a surface of the above tie coat is formed a finish coat formed from a three-pack type organopolysiloxane-based curing composition comprising (c1) a main agent comprising the component (b1), (c2) a curing agent component comprising tetraalkoxysilicate or its condensate and (c3) a curing accelerator component comprising a metallic compound. Further disclosed is a composite coating film wherein an epoxy-based sealer coat, the tie coat and the finish coat are formed in this order on a surface of an old antifouling coating film (G). There is provided by the invention a tie coat capable of forming a composite coating film having excellent interlaminar bond property. The composite coating film is favorably formed on a surface of a base, an undercoating film, an old antifouling coating film or the like, has excellent interlaminar bond strength and antifouling property and is preferably used for coating outer surfaces of ships, submerged parts of marine structures, water supply/drainage channels of atomic power plant, etc.

The invention relates to a coated high-barrier biaxially stretched polylactic acid film and a preparation method thereof. The coated high-barrier biaxial tensile polylactic acid film structurally comprises a high-barrier coating, a bottom coating and a substrate layer from inside to outside in sequence, wherein the substrate layer is composed of three layers of a co-extruded biaxially stretched PLA (polylactic acid) film, namely a layer A, a layer B and a layer C; the layer A and the layer C comprise the following components in parts by mass: 68-93.2 parts of PLA, 5-20 parts of a toughening agent, 1-3 parts of a compatibilizer, 0.2-1 part of a chain extender, 0.2-1 part of an antioxidant, 0.5-3 parts of an antistatic agent, 0-1 part of an open agent and 0-1 part of a smoothening agent; thelayer B comprises the following components in parts by mass: 76-93.8 parts of PLA, 5-20 parts of a toughened resin, 1-3 parts of a compatibilizer and 0.2-1 part of a chain extender; and the high barrier coating is a water-resistant modified PVA coating. Production procedures are simple, green and environmental protection materials are used, and the film is excellent in performance, and still hasa good barrier effect in case of a very thin high-barrier coating.

The invention discloses a bi-component polyurethane waterproof coating and a preparation method thereof. The coating comprises a component A and a component B, wherein a raw material formula for preparing the component A comprises aliphatic isocyanate and flame-retardant polyether polyol; a raw material formula for preparing the component B comprises a chain extender and a catalyst. The flame-retardant polyether polyol in the raw material formula for preparing the coating has flame retardance, so that a prepolymer formed by the flame-retardant polyether polyol and the aliphatic isocyanate has flame retardance, and then the bi-component polyurethane waterproof coating has flame retardance; because the prepolymer formed by the flame-retardant polyether polyol and the aliphatic isocyanate in the component A has flame retardance, the coating can achieve the same flame-retardant effect without a flame retardant in the component B, and then a phenomenon of separation of the flame retardant added in the component B is avoided or reduced, so that the flame retardance and stability of the coating are improved, the film-forming effect of the coating is good, and the storage time is long.

The invention relates to the technical field of polyurethane waterproofing paint, and provides latent-curing single-component color polyurethane waterproofing paint. The latent-curing single-component color polyurethane waterproofing paint comprises the following components by weight: 18-22 parts of polyether 2000, 5-7 parts of polyether 330N, 18-22 parts of chlorinated paraffin, 28-32 parts of powder, 0.8-1.2 parts of dispersing agent, 6-10 parts of MDI-50, 0.8-1.2 parts of catalyst, 3-5 parts of latent curing agent, 3-5 parts of chain extender, and 6-8 parts of solvent. The latent-curing single-component color polyurethane waterproofing paint has such advantages as high strength, good toughness, good flexibility, low-temperature resistance, strong adhesive power with the basal plane, good adaptability, wide application field, convenience for construction and low dependency on the operation proficiency. The latent-curing single-component color polyurethane waterproofing paint not only satisfies the application field of the original single-component polyurethane waterproofing paint, but also can be suitable for the waterproofing requirements in such special fields as larger-deformation areas and low-temperature areas, so that the latent-curing single-component color polyurethane waterproofing paint has strong adaptability and strong market competitive advantages, and meets the higher and higher requirements of the market to the products.

The invention relates to a waterborne polyurethane-MXene electromagnetic shielding bionic nanocomposite film and a preparation method. Through pre prepolymeriztion reaction of polytetrahydrofuran gl and diisocyanate and chain extension by a hydrophilic chain extender, then a neutralizing agent is added, subsequently, deionized water is added for emulsification dispersion to obtain a waterborne polyurethane emulsion; waterborne polyurethane and MXene are prepared into water dispersion liquid, MXene is added to the waterborne polyurethane under stirring, continuous stirring is carried out to enable waterborne polyurethane macromolecules to be fully and uniformly adsorbed on MXene nanosheets. And waterborne polyurethane-MXene composite dispersion liquid is obtained; and a series of nanocomposite films are prepared by a vacuum filtration method, a solvent evaporation method or a coating method. The prepared nanocomposite thin films have ordered "brick-wall" structures in a bionic shell layer shape on the micro and nano scales, the mechanical properties are excellent, the flexibility is good, the electromagnetic shielding effectiveness is excellent, preparation methods are diverse, thethickness is controllable, and application is wide.

The invention discloses UV-curable elastic polyurethane acrylate emulsion and a synthesis method thereof. The synthesis method of the UV-curable elastic polyurethane acrylate emulsion comprises the following steps: carrying out reaction on polyester glycol or polyether glycol, carboxylic acid-containing glycol and diisocyanate to generate a prepolymer, adding an optimized micromolecular chain extender for carrying out chain extension, then adding hydroxy-containing acrylate for carrying out blocking reaction, diluting by virtue of an organic solvent, neutralizing and salifying by adopting organic amine, finally adding deionized water for carrying out hydration, and adding a photoinitiator to obtain the UV-curable elastic polyurethane acrylate emulsion. The UV-curable elastic polyurethane acrylate emulsion is polyurethane blocked by acrylate, and a molecular chain of the UV-curable elastic polyurethane acrylate emulsion is provided with hydrophilic negative ions and double bonds, so that the UV-curable elastic polyurethane acrylate emulsion has self-emulsifying property and photocuring activity; and a cured film formed by carrying out photocuring on the synthesized elastic polyurethane acrylate emulsion has excellent mechanical properties, tensile strength is 21MPa, and elongation is 350%, so that the elastic polyurethane acrylate emulsion can serve as matrix resin of water-based ink and waterborne UV-curable elastic paint.

The invention discloses a sulfonic acid type waterborne polyurethane-acrylate self extinction resin, the resin is prepared through the reaction of the components of A, prepolymer of diisocyanate sealing side, B, a component of the prepolymer dissolving and diluting the diisocyanate sealing side, C, small molecule amine chain extender, and D, radical initiator. The resin combines the excellent properties of polyurethane and acrylic acid, can achieve excellent adhesion force on the base materials of ABS, PC, PVC, PET and the like, and can achieve excellent hand sweat resistant property, and through adding a cross-linking agent the resin can achieve the excellent properties of alcohol rub resistance, and solvent resistance and the like, the resin can be applied in the fields of leather finish, wood plastic, paper printing, printing ink, printing coating, packaging coating, and matt nail polish and the like.

The invention discloses an anti-fingerprint TPU protective film for a 3D curved screen. The protective film comprises a low-viscosity protective film, an anti-fingerprint UV hardening coating, an optical hard TPU resin film layer, an optical-grade high-viscosity silica gel pressure-sensitive adhesive layer and a fluorine element release film which are attached from top to bottom; the anti-fingerprint UV hardening coating is formed by coating an anti-fingerprint UV hardening coating; the optical hard TPU resin film layer is formed by coating optical hard TPU glue, the optical-grade high-viscosity silica gel pressure-sensitive adhesive layer is formed by coating an optical-grade high-viscosity silica gel pressure-sensitive adhesive; the anti-fingerprint UV hardening coating is prepared fromthe following components: UV prepolymer resin, an acrylate reactive diluent, a photoinitiator, a slipping aid and a first solvent, the optical-grade hard TPU glue is formed by polymerizing polyisocyanate, polyester polyol and a chain extender in a second solvent under the action of a first catalyst; the optical-grade high-viscosity silica gel pressure-sensitive adhesive is composed of silica gel resin, a cross-linking agent, an anchoring agent and a second catalyst. The anti-fingerprint TPU protective film for a 3D curved screen has the properties of fingerprint resistance, scratch resistance,difficulty in bursting and good fitting property of the curved screen.

The invention discloses modified polyphenylene sulfide resin suitable for 3D printing. The modified polyphenylene sulfide resin is a combination of the following components in parts by weight: 65-85 parts of polyphenylene sulfide resin, 0.05-0.6 part of a chain extender, 0.5-1 part of an end capping agent, 0.1-0.7 part of a crosslinking agent, 3-20 parts of low-molecular-weight polymer, 2-10 parts of a toughening agent, 1-5 parts of a reinforcing agent, 1-6 parts of a lubricating agent and 0.1-0.7 part of a heat stabilizer. The polyphenylene sulfide resin is modified by adopting the simple processes of mixing materials and extruding, and the processing temperature of the modified polyphenylene sulfide resin is reduced greatly. The melting temperature of the device formed by printing by adopting the modified polyphenylene sulfide resin is not reduced significantly, and the toughness is improved, and thus the polyphenylene sulfide resin can be widely applied to the field of 3D printing.

The invention relates to an anti-sticking and wear resistant polyurea coating and its preparation method. The coating is prepared by blending of component A and component B. Specifically, the component A is synthesized by the following raw materials by weight: 90-120 parts of isocyanate, 40-60 parts of polyether polyol and 20-30 parts of fluorocarbon diol; and the component B is prepared by the following raw materials by weight: 500-800 parts of polyether amine, 400-600 parts of organosilicon diamine, 300-400 parts of high activity polyether polyol, 400-500 parts of an amino chain extender, 80-100 parts of an amino cross-linking agent, 100-150 parts of a high boiling point diluent, 5-10 parts of a composite catalyst, 400-600 parts of composite nano-metal oxide surface active materials, 600-800 parts of a filling material, and 40-60 parts of a pigment. The invention also includes a preparation method of the anti-sticking and wear resistant polyurea coating. A coating layer obtained by spraying of the anti-sticking and wear resistant polyurea coating in the invention has strong adhesion, and has good adhesion resistance, wear resistance, corrosion resistance, as well as impact resistance. Therefore, the anti-sticking and wear resistant polyurea coating of the invention is especially suitable for spraying on the lining surface of a heavy transport dump truck.

Provided is a preparation method for an antifogging thin film coating with high light transmission. M-phthalic acid triethylene glycol ester-5-sodium sulfonate (self made), polyethylene glycol 400, isophorone diisocyanate and pentaerythritol triacrylate are employed as main raw materials, dibutyltin dilaurate is employed as a catalyst, dimethylolpropionic acid is employed as a chain extender, acetone is employed as a solvent, and hydrophilic UV prepolymers are prepared; ethyl orthosilicate is employed as a precursor, gamma-methacryloxy propyl trimethoxysilane is employed as a modifier, a sol-gel method is employed, and uniform and stable modified SiO2 sol is prepared; the hydrophilic UV prepolymers and the modified SiO2 sol are subjected to hybridization through a UV curing way, and a thin film coating is obtained. The prepared thin film coating has good hardness and adhesive force, water resistance and high light transmission and good antifogging effects, and can be used for antifog of surfaces of glass and eyeglass. The preparation technology of the thin film coating accords with green environmental protection concepts, curing and film forming are fast, and comprehensive performances are good. The antifogging thin film coating has good market prospect and is suitable for popularization and application.

The invention discloses a bio-based photocuring polyurethane self-repair coating. Firstly, the chain extender polyol, diisocyanate and bio-based dipolyamine are used as monomers for polycondensation reaction to obtain amino-terminated prepolymers; secondly, isocyanates containing carbon-carbon double bonds and self-healing units are grafted on the prepolymers , a bio-based photosensitive polyurethane resin was synthesized; finally a bio-based photocurable polyurethane self-healing coating was prepared with bio-based photosensitive polyurethane resin, photoinitiator, reactive diluent and solvent. In the present invention, the bio-based dimeramine with low price and renewable resources can be used to improve the hydrophobicity and flexibility of the coating; the carbon-carbon double bond and the isocyanate of the self-repairing unit can be used for photocuring and self-repairing of the coating performance.

The invention provides a preparation method of waterborne polyurethane adhesive for a card matrix material, and belongs to the technical field of high polymer materials. The method comprises the following preparation steps of: carrying out polymerization reaction on mixed binary isocyanate formed by isophorone diisocyanate and dicyclohexyl methane-4,4-diisocyanate and polyhydric alcohol of taking polyester diol as a primary material and polyether glycol as an auxiliary material; adding proper hydroxyl acrylate to a reaction system, and preparing a polyurethane prepolymer by virtue of a chain extender; neutralizing by use of triethylamine, and adding water to emulsify in a high-speed disperser, so as to obtain a waterborne polyurethane dispersing body; adding ethanediamine to carry out chain extension again, and finally mixing with assistants such as a defoamer, a thickener, anti-adhesive and an ultraviolet light absorber to obtain the waterborne polyurethane adhesive for the card matrix material. The preparation method has the characteristics of being low in preparation cost, strong in adhesion and the like, is simple in production technology and can be used for easily coating products; the solid content can achieve 40%; and the coated film with glue is especially suitable for coating various color cards.

The invention relates to a preparation method of eleostearic acid monoglyceride modified waterborne polyurethane emulsion. The preparation method is a process taking polyisocyanates, oligomer polyhydric alcohols, small molecule chain extender, hydrophilic chain extender and salt-forming agent of triethylamine as main raw materials and taking eleostearic acid monoglyceride as a modifying agent to prepare the eleostearic acid monoglyceride modified waterborne polyurethane emulsion. Surface tension of a film can be reduced by oleophilic long carbon aliphatic chain in an eleostearic acid monoglyceride structure, a double bond can be subjected to crosslinking reaction in the latter film formation process, the degree of crosslinking of the film is increased, and the defects of poor water resistance, poor solvent resistance, insufficient mechanical property, and the like of the existing waterborne polyurethane emulsion film are improved.

The invention discloses a preparation method of a light-resistant water-based polyurethane coating. The preparation method comprises the following steps of: mixing bisphenol S and diisocyanate in the presence of a dibutyltin dilaurate catalyst, and stirring to react at 60-85 DEG C for 1.5-3.5 hours to obtain a polyurethane prepolymer A; adding a hydrophilic chain extender with carboxyl content accounting for 1.2%-4.6% of the weight of A into A, then adding a solvent which accounts for 15%-35% of the weight of A, and stirring to react under the condition of 80-95 DEG C for 1.0-4.0 hours; adding triethylamine according to the condition that the mole ratio of COOH/NH2 is 0.6:(1-1.6):1 for neutralization, stirring to react for 30-70 minutes, and adding water for emulsification to form the light-resistant water-based polyurethane coating. The prepared light-resistant water-based polyurethane is environmentally-friendly and low in cost and can meet the requirement of the market on the property of light-resistant polyurethane.

The invention provides a hyperbranched water-based polyurethane coating and a preparation method thereof, belongs to the field of water-based coating, and is used for solving the problem that the existing hyperbranched water-based polyurethane is poor in waterproofness, solvent resistance and weather fastness. The coating comprises 35-68 parts of hyperbranched water-based polyurethane, 0.3-0.9 part of water-based wetting agent, 0.2-0.7 part of water-based flatting agent, 0.5-1.1 parts of water-based deformaer, 8-12 parts of water-based cosolvent and 2.5-4.3 parts of curing agent. The hyperbranched water-based polyurethane is prepared with hyperbranched polyester BoltornTMH40 as a soft segment and diaminosulfonate as a hydrophilic chain extender. A film formed by the cured hyperbranched water-based polyurethane coating provided by the invention has no phenomena of blushing, bubbling and falling even after being soaked in normal-temperature water for 60 hours, and also has no phenomena of blushing, facing and dulling even after being wiped 200 times by using ethanol and acetone.