32results about How to "Excellent resistance to ethanol" patented technology

The invention relates to a preparation method of waterborne polyurethane elastic dispersion. The method comprises the following steps: (1) synthesizing a siloxane polymer: polymerizing a compound as shown in formula (I) and the compound as shown in formula (II) to get the siloxane polymer; and (2) preparing the waterborne polyurethane elastic dispersion, wherein the raw material comprises the siloxane polymer obtained in the step (1). After the elastic polyurethane dispersion provided by the invention forms a film, the waterborne polyurethane elastic dispersion has not only excellent tensile strength, rebound elasticity, wear resistance, water resistance and ethanol tolerance, but also soft and smooth hand feeling and high light transmission; and an additional filler is not required, a product has high light extinction or frosted appearance by only adjusting components, after the film is formed, the elastic polyurethane dispersion is soft, and the elastic polyurethane dispersion is suitable for paper, cloth, leather and other soft substrates, and the preparation process is simple and easy to operate.

The invention provides a rubber alloy material of an ethanol-resisting gasoline diaphragm of a fuel pressure regulator and relates to a preparation method of the rubber alloy material of the ethanol-resisting gasoline diaphragm of the car fuel pressure regulator, which overcome the defects that the diaphragm which is used by the existing car fuel system regulator and takes butadiene-acrylonitrile rubber as a main material does not resist an ethanol solvent, and the cold resistance and the ozone aging resistance of the diaphragm are poor. The rubber alloy material is prepared from the butadiene-acrylonitrile rubber and chlorine ether rubber in an alloying way. The rubber alloy material is composed of the butadiene-acrylonitrile rubber, the chlorine ether rubber, a filling reinforcing agent, a vulcanizing system, a protection system, an activating agent and a plasticizer. The preparation method of the rubber alloy material comprises the following steps of: (1) plastifying; (2) mixing; and (3) vulcanizing and molding. The rubber alloy material of the ethanol-resisting gasoline diaphragm of the fuel pressure regulator, provided by the invention, has excellent oil resistance and solvent resistance and also has the cold resistance and the ozone aging resistance. The preparation method of the rubber alloy material has the advantages of simplicity, easiness in operation and less equipment investment.

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a water-based polyurethane emulsion with high water resistance and ethanol resistance and a preparation method thereof. The invention provides the preparation method of the water-based polyurethane emulsion with high water resistance and ethanol resistance. The preparation method comprises the following steps: a) carrying out a first reaction on poly(propylene carbonate) polyol, diisocyanate, castor oil and a hydrophilic chain extender under the action of a catalyst to obtain a first product;b) adding a silane coupling agent into the first product to carry out a second reaction to obtain a second product; and c) adding a neutralizer into the second product to carry out a neutralization reaction, then adding deionized water for emulsifying, and then adding a non-hydrophilic chain extender to carry out a third reaction to obtain the water-based polyurethane emulsion. Experimental results show that a coating film formed by the water-based polyurethane emulsion disclosed by the invention has excellent boiling water resistance and ethanol resistance.

The invention belongs to the technical field of fine chemical engineering, and especially relates to a double-component aqueous polyurethane, and a preparation method and applications thereof. The double-component aqueous polyurethane is prepared from following components: (Poly(propylenecarbonate)polyol, diisocyanate, a hydrophilic chain extender, a non-hydrophilic former chain extender, a non-hydrophilic later chain extender, a catalyst, a neutralizer, deionized water, castor oil, a silane coupling agent, a film forming auxiliary agent, a levelling agent, an anti-foaming agent, and an aqueous curing agent. After curing film forming of the double-component aqueous polyurethane, film ethanol resistance is improved greatly, so that aqueous curing agent using amount is reduced, preparation cost is reduced, and problems in the prior art that the using amount of conventional double-component aqueous polyurethane aqueous curing agent is large, and double-component aqueous polyurethane preparation cost is high are solved.

Transparent hardening composition is prepared from components in parts by weight as follows: 5-20 parts of organic cellulose ester, 15-30 parts of monomers, 10-30 parts of a prepolymer, 2-7 parts of a first initiator, 2-7 parts of a second initiator, 0.1-1 part of a leveling agent and 30-65 parts of an organic solvent, wherein the organic cellulose ester structurally contains, in percentage by mass, 2%-55% of an acyl functional group and 1%-5% of a hydroxyl functional group. The organic cellulose ester in the composition remarkably improves the weather fastness, crimpiness, film coating property, flexibility, adhesion and wear resistance of a hardened coating of a transparent hardened TAC film, and the transparent hardening composition can be widely applied to the field of glasses lenses.

The invention relates to a polyarylsulfone modified polyurethane resin emulsion. The hydroxy-terminated low molecular weight linear polyarylsulfone is first synthesized by stepwise polymerization, andthen the hydroxy-terminated low molecular weight linear polyarylsulfone is used as a polymer modifier to participate in the prepolymerization, chain extension and emulsification of the polyurethane.The molecular structure of the polyurethane resin of the invention contains a large amount of polyarylsulfone units, so the emulsion has the advantages of high hardness, good water resistance, good ethanol resistance and high temperature resistance.

The invention provides schizosaccharomyces pombe with high acetic acid tolerance, and belongs to the technical field of microorganisms. The invention relates to Schizosaccharomyces pombe Sujiu.014, in particular to Schizosaccharomyces pombe Sujiu.014, the strain is screened from Maotai-flavor liquor to produce fermented grains, and the preservation number is CGMCC (China General Microbiological Culture Collection Center) No.21791. The strain is schizosaccharomyces pombe which has extremely strong acetic acid tolerance and relatively good lactic acid tolerance, high temperature resistance and ethanol tolerance. The yeast strain can tolerate 20 g/L acetic acid, is a yeast strain with the highest acetic acid tolerance reported at present, and can tolerate 60 g/L lactic acid, 40 DEG C temperature and 8% ethanol at the same time. The problem that yeast fermentation is inhibited in a high-concentration acetic acid environment can be solved.

The invention discloses waterborne polyurethane for a flocking adhesive and a preparation method thereof. The waterborne polyurethane comprises the following components: isocyanate, polyether polyol,polyester polyol, polyacrylate polyol, a micromolecular chain extender and water, wherein the isocyanate is 4,4'-dicyclohexylmethane diisocyanate or isophorone diisocyanate. The preparation method comprises the following steps: melting the polyether polyol, the polyester polyol and the polyacrylate polyol, carrying out mixing, vacuumizing and dehydrating until the water content of a material is lower than 400 ppm, and carrying out pre-polymerization, chain extension, neutralization emulsification and post-chain extension so as to prepare the waterborne polyurethane used for the flocking adhesive. The waterborne polyurethane provided by the invention has good water resistance and ethanol resistance, keeps wear resistance and low-temperature resistance at the same time, and has good flexibility.

The invention discloses an environment-friendly glass paint, made from waterborne resin, modified amino resin, a coupling agent, a leveling agent, water, an acid catalyst, a film-forming aid, a pigment, and a defoaming agent. The environment-friendly glass paint is made by: mixing part of the defoaming agent by weight and part of the deionized water by weight, adding the water-soluble resin, the pigment and the coupling agent, grinding with a grinder until fineness reaches 20 mu m and below, adding the amino resin, the film-forming aid, the acid catalyst, the leveling agent, the rest of the deionized water and the rest of the defoaming agent, dispersing with a high-speed disperser for 20-30 min, adding the balance of the water by weight, and filtering with 200-mesh filter cloth. By modifying traditional water-soluble resin and modified amino resin, the glass paint is prepared, which has good ethanol resistance, good recoating property, high adhesion, good toughness and high hardness.

In order to solve the problem of insufficient water barrier and oil barrier properties of an existing polyacrylate coating for food paper and a paperboard, the invention provides a barrier coating for food paper and a paperboard. The barrier coating comprises the following components: a component A: an acrylate copolymer emulsion, wherein the average particle size of emulsion particles is 0.02-0.2 micron, the Tg value is -20 DEG C to 10 DEG C; and a component B: an acrylate copolymer emulsion, wherein the average particle size of emulsion particles is 0.02-0.2 micron, and the Tg value is 10 DEG C to 120 DEG C. Meanwhile, the invention further discloses the food paper and the paper board comprising the barrier coating for the food paper and the paper board. The barrier coating for the food paper and the paperboard, provided by the invention, has relatively good water and grease barrier performance and also has excellent heat sealing performance.

The invention discloses an LED lamp sheet capable of displaying a three-dimensional picture, and a processing technology thereof. The processing technology comprises the steps: taking a lamp sheet base body, coating the upper surface of the base body with a photoresist in a spin-coat manner after pretreatment, and carrying out baking and exposure development, wherein a photoetching pattern existson the surface of the base body at the moment; placing the base body in a surface treatment liquid, soaking, spraying ultraviolet fluorescent ink after soaking, and removing the photoresist, wherein asprayed ultraviolet fluorescent pattern exists on the surface of the base body, and an ultraviolet fluorescent ink layer is formed; on the upper surface of the ultraviolet fluorescent ink layer, placing the base body in the surface treatment liquid again, soaking, repeating photoetching and ink spraying steps after soaking, spraying a layer of infrared fluorescent ink on the ultraviolet fluorescent pattern, and forming an infrared fluorescent pattern to obtain an infrared fluorescent ink layer; and spraying conventional printing ink on the lower surface of the base body to obtain a conventional ink pattern. According to the invention, the LED lamp sheet prepared by the method is excellent in pattern durability, relatively good in heat resistance and ethanol resistance, and relatively highin practicability.