472results about How to "Not easy to yellow" patented technology

The invention discloses an energy-saving insulated flame-retardant water-proof corrosion-proof functional coating and a preparation method thereof. The functional coating is prepared from the following raw materials: an aqueous polyurethane dispersion, a flame retardant, a flame-retardant antismoke agent, a hollow glass bead, a wetting dispersant, an anti-settling agent, a thickening agent, water, a leveling agent and a de-foaming agent, has the functions of heat preservation, flame retarding, water prevention and corrosion resistance and the like, is unlikely to become yellow when in use, is safe and reliable, is excellent in performance, is good in compatibility with pigment dyestuff, is unlikely to damage the coated surface, is easy to modify, is nontoxic, is safe to use, does not pollute environment and is suitable for the fields of inner and outer wall coating, pipeline coating, wood furniture coating, decoration coating, chemical corrosion-proof coating and the like.

The invention belongs to the field of chemical industry, and particularly discloses white finish coat photocurable UV (ultraviolet) paint and a preparation method thereof. The photocurable UV paint comprises the following components in percentage by weight: 20-60% of epoxy acrylate, 20-60% of polyurethane acrylate, 2-5% of phenyl acetone photoinitiator, 0.2-1% of diphenyl phosphine oxide photoinitiator, 0.2-1% of dispersant, 0.2-1% of leveling agent, 1-40% of titanium white TiO2, 5-15% of two-functional-group reactive diluent and 5-30% of three-functional-group reactive diluent. The paint has the characteristics of favorable gloss, adhesive force and leveling property, thus ensuring that the white UV paint can be better applied.

The invention discloses a water-dispersible HDI-TDI mixed tripolymer curing agent and a preparation method thereof. The method comprises steps as follows: (1) diisocyanate monomers and a nonionic hydrophilic modifying agent are put into a round-bottom flask under the protection of nitrogen and heated to reach 50-70 DEG C for a thermal reaction; (2) after the mixture reacts for 2-4 h, a trimerization catalyst is added, the mixture is subjected to a thermal reaction continuously, a polymerization inhibitor is added after the percentage composition of -NCO of the system reaches the target, and the mixture is subjected to the thermal reaction for 0.5-1.5 h; (3) an anion hydrophilic modifying agent is added to a tripolymer obtained in the step (2), the mixture is continuously stirred and subjected to the thermal reaction at the temperature of 60-80 DEG C, a neutralizing agent is added after the mixture reacts for 5-7 h, and the mixture is stirred uniformly, subjected to the thermal reaction for 0.5-1.5 h and discharged after being cooled. The preparation method is simple, and the prepared curing agent has the advantages of good water dispersibility, good storage stability and good film water resistance and can be applied to a water-based bi-component polyurethane coating well.

The invention relates to a modified double-component epoxy resin paint, wherein the raw materials of the main ingredients includes bisphenol A epoxy resin, multiple functional group glycide amine epoxy resin and filler selected from silicon dioxide, titanium oxide, antimony trioxide, zinc oxide and calcium carbonate, the raw material of the curing agent includes modified aliphatic polyamines, organic diatomaceous soil and methyl ethylene glycol.

The invention provides a cany bamboo fabric and preparation method, which comprises a cany skin layer or a bamboo skin layer (1) and a lapping cloth layer (2); wherein, the cany skin layer or the bamboo skin layer (1) are produced through the scraping and silking or drawing out and planishing treatments; the cany skin layer or the bamboo skin layer (1) are compounded with the lapping cloth layer (2) together. The cany bamboo fabric is characterized in that (a) the processes of degreasing, purifying, stewing, acid treatment and bleaching treatment are added between the process of silking or drawing out and the process of planishing, (b) the cany skin or the bamboo skin are weaved into the cany skin layer or the bamboo skin layer (1), and (c) the processes of softening finishing and hot compression and fixation are processed as the cany skin layer or the bamboo skin layer (1) are compounded with the lapping cloth layer (2) together. The cany bamboo fabric has the advantages of beautiful appearance, good performance of ultraviolet resistance, soft texture, uneasy to fold, free of yellowing, easy to clean, being applicable to the production of clothing, bedding articles, high grade car pad set, slipcover, window curtain, carpet, and shoes and hats, and versatility.

The invention relates to a preparation method of polyurethane raw liquid for high-speed spinning. The preparation method comprises the following steps: (1) adding a solvent and mixed polyester to a pre-polymerization tank; (2) accurately adding mixed diisocyanate according to a predetermined NCO/OH ratio so as to carry out prepolymefization reaction; (3) after ending prepolymefization reaction, transferring a prepolymer to a chain extension tank, adding a cleaning solvent, uniformly stirring, and cooling a refrigerant to about 0-20 DEG C; (4) slowly adding chain extension amine and a chain terminating agent solution, and reacting so as to form a polyurethane urea solution in the end; (5) transferring the obtained polyurethane urea solution to a storage tank, and adding multiple functional auxiliary materials and additives; and (6) fully and uniformly stirring, carrying out vacuum defoamation, and preparing polyurethane fibers by using polymerization raw liquid through dry spinning. The polyurethane raw liquid for high-speed spinning can be used for the spinning of fibers at the spinning speed of above 1000m/min. The new technology can be used for improving the spinning efficiency and reducing energy consumption and labor cost.

The invention discloses a self-emulsifying waterborne polyurethane curing agent and a preparation method thereof. The self-emulsifying waterborne polyurethane curing agent takes micromolecule dihydric alcohol containing a sulfonic acid group with a molecular weight of 350 to 1,000 and diisocyanates as raw materials to prepare the sulfonic acid group modifying self-emulsifying waterborne polyurethane curing agent with a multifunctional NCO group on a terminal. The invention also discloses a preparation method of the self-emulsifying waterborne polyurethane curing agent. The self-emulsifying waterborne polyurethane curing agent has the advantages of good water dispersibility, good storage stability, good water resistance of coating film, high strength property and the like, and is suitable for mating with waterborne polyurethane dispersion, waterborne acrylic emulsion and waterborne alkyd resin and the like, prepared two-component polyurethane coatings and adhesives by the self-emulsifying waterborne polyurethane curing agent are especially suitable for some special performance requirements of waterborne products. The self-emulsifying waterborne polyurethane curing agent disclosed by the invention can also be used for mating with hydroxyl components of the solvent-type two-component coatings and the adhesives to produce a two-component solvent type and has a wide range of application.

The invention provides a 3D-printing wound dressing material based on silk microsphere bio-ink and a preparation method thereof. The preparation method includes the following steps: transferring silkmicrosphere bio-ink, which includes silk protein microspheres coating aspirin, silk protein water solution, ultraviolet initiator and polyvinyl alcohol ester, into a syringe of a 3D-printing machine;with a cotton gauze as a base printing cloth, printing the surface of the cotton gauze with the silk microsphere bio-ink according to a periodically circulated cross-network structure model; and rapidly curing and shaping the 3D-printing wound dressing material under ultraviolet irradiation. The product is based on 3D-printing technology, wherein the formed cross-network structure contains regularly arranged silk microspheres, and the silk microsphere bio-ink coating layer cures on the surface of the cotton gauze and does not completely penetrate through the cotton gauze. The 3D-printing wounddressing material has good mechanical performance and biocompatibility and excellent slow-release performance, can protect a wound for a long time and can accelerate healing of the wounding.

The invention discloses an umbrella cloth. The umbrella cloth comprises a fabric layer and a water-proof layer coating the fabric layer. The umbrella cloth is characterized in that the fabric layer isprepared by blending and weaving polyester fibers and acrylic fibers, wherein the water-proof layer is prepared from the following components in parts by weight: 35 to 45 parts of resin, 10 to 20 parts of silicone oil, 11 to 15 parts of cross-linking agent, 2.5 to 5.5 parts of adhesive and 1.5 to 4.5 parts of ultraviolet screening agent; the resin contains polyurethane emulsion and polyacrylate emulsion; the mass ratio of the polyurethane emulsion to the polyacrylate emulsion is 5 to 3; the silicone oil is prepared by mixing epoxy-modified silicone with polyether-modified silicone. The invention also aims at providing a method for manufacturing the umbrella cloth; the manufactured umbrella cloth has the advantages of good water-proof and ultraviolet-proof effects, light resistance and lowpossibility of yellowing while processing.

A photo-curable polysiloxane polyurethane (methyl) acrylate composition comprises polysiloxane polyurethane (methyl) acrylate, a compound containing ethylenic-bond unsaturated functional groups, a photoinitiator and a thiol compound. The polysiloxane polyurethane (methyl) acrylate comprises polymerization products obtained by polymerization reaction of reactants, the reactants of the weight-average molecular weight of less than 5000 have polysiloxane polymers having dyhydroxy, diisocyanate compounds and (methyl) acrylate compounds having hydroxyl. The mole ratio of diisocyanate compounds to the (methyl) acrylate compounds having hydroxyl is from 1.05 to 1.45. The cured product formed by the composition has a tensile failure length of more than 680% and a volume shrinkage of less than 1.95%.

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 relates to the technical field of polycarbonate material, particularly to high light-transmittance and high flame-retardant polycarbonate material. The polycarbonate material contains the following constituents and materials by weight: 94.8-99.5% of polycarbonate, 0.1-0.3% of fire retardant A, 0.1-3.5% of fire retardant B, 0.1-0.3% of antioxidant A, 0.1-0.3% of antioxidant B, 0.1-0.2% of a lubricating agent and 0-0.6% of light stabilizer, and the sum of the weight percentages of the constituents is 100%. The preparation method comprises the steps of putting the constituents except for the polycarbonate into a high-speed mixer to uniformly agitate, putting the polycarbonate and uniformly mixed material into the high-speed mixer to carry out three-segment agitation, and putting the material into a double-screw extruder to extrude and pelletize. The polycarbonate material disclosed by the invention has the advantages of high light transmittance and high fire resistance and the like, can meet the requirements of a lampshade for outdoor illumination, and is simple in process and beneficial for generalization and application.

A paint for the coiled insulating and anticorrosion material is prepared from special polyester resin, high etherified cross-linking resin and pigment, functional insulating filler, special chemical assistant and solvent through proportional mixing, dispersing, grinding, adding insulating filler, etc. Its advantages are no poison and pollution, high flame-retarding and insulating effect, and high resistance to ageing and corrosion.

The embodiment of the invention provides multifunctional environment-friendly water-based nanometer diatom ooze and a preparation method thereof. The multifunctional environment-friendly water-based nanometer diatom ooze is prepared from the following ingredients in percentage by mass: 30 to 45 percent of waterborne odor removal emulsion, 15 to 25 percent of kieselguhr, 1 to 5 percent of nanometertitanium dioxide, 20 to 32 percent of filling materials, 0.5 to 1 percent of sodium hydroxide, 1 to 2 percent of waterborne dispersing agents, 0.5 to 1 percent of anti-freezing agents, 1 to 3 percentof thickening agents, 0.2 to 0.5 percent of antibacterial agents, 0.2 to 0.5 percent of mildew preventives and 8 to 15 percent of deionized water. A coating formed by coating the multifunctional environment-friendly water-based nanometer diatom ooze provided by the invention onto the surface of a base body has the effective protection effects of high sealing performance, anti-corrosion performance, scratching and friction resistance and anti-impact performance and also has the advantages that the decoration performance is high; the antibacterial and mildewproof effects are realized; the functions of adsorbing and decomposing harmful substances such as formaldehyde, benzene and ammonia gas in the air in a long-effect way, regulating the humidity and the like can be realized; the service life is long; the effect is obvious.