238results about How to "Viscosity is easy to control" patented technology

The invention relates to a technology for producing poly(p-phenylene benzobisoxazole) (PBO) fibers, and belongs to the field of high performance fiber production. The technology comprises the steps: A, degassing, pre-polymerizing and defoaming; B, post-polymerizing and defoaming; C, spinning and solidifying; D, post-treating; and E, heat-treating and the like. Through optimizing equipment and controlling parameters, a plurality of problems of the prior art are solved. The technological process, equipment cooperation and parameter control of the basic technical scheme are taken as an integral system, are cooperated with each other and are dispensable, materials can be effectively transferred, the scale polymerizing and subsequent scale spinning of the PBO polymer are realized, and a high-quality PBO fiber product is obtained.

The invention discloses a preparation method of polyurethane resin for gravure composite ink, wherein the polyurethane resin is alcohol ester-soluble polyurethane resin not containing free cyanate ester radicals. Large amounts of allophanate radicals are introduced into the resin so that the ink prepared from the resin has excellent adhesion fastness to substrates such as PET (Polyethylene Glycol Terephthalate), NY (Nylon) and PP (Polypropylene) and the like. The preparation method is characterized in that diisocyanate is reacted with high-molecular polyol to generate NCO-terminated prepolymers, and then the prepolymers are added into a solvent containing an amine chain extender to achieve the polyurethane resin for the ink. The soft and hard segment of the resin has the advantages of wide adjustable range, large cohesive energy, good anti-aftertack property and good heat resistance; and the prepared ink has high binding strength to various printing substrates and has high composite strength. The preparation method provided by the invention has obvious characteristics of stable reaction in the synthesis process of the resin, easiness in control of the preparation process, narrow distribution of the molecular weight and good dissolubility of the resin.

The invention relates to a method for the preparation of silicon oil by silicon oil byproduct, in which dimethyl silicon oil byproduct in acid method production is used as raw material to prepare low-viscosity dimethyl silicone coil under the catalysis of solid acid catalyst. The method comprises the steps: calculating the constitution of raw materials in the silicon oil byproduct and drawing a proportion-viscosity relationship curve of the raw materials to set a feeding ratio, controlling reaction temperature between 50 and 110 DEG C under the catalyst of 3%-15% of solid catalyst, and implementing telomerization for 2 to 6 hours. By reutilizing the silicon oil byproduct, the method solves the problem of warehouse occupation of the silicon oil byproduct and lowers production cost. Using the solid acid catalyst can directly prepare neutral equilibration reaction product without neutralization and water washing procedures, the reaction process is simple, the viscosity of the product is easy to control and the regenerated byproduct can still be used repeatedly.

A structural composite part made of pre-impregnated fiber plies. The edges of two adjacent fiber plies are connected via a longitudinal composite joint made structural by a nanostructure arranged within the composite joint. A method of producing a structural composite part made of pre-impregnated fiber plies. The edges of two adjacent fiber plies are connected via a longitudinal composite joint made structural by a nanostructure and an aircraft structure comprising such structural composite parts.

The present invention belongs to the field of resin preparation technology that is a kind of connecting material to printing ink. It is obtained with processed by the following steps: arbitrarily mixing p-methyl hydroxybenzene, p-tert-butylphenol, p-tex-octylphenol and p-nonylphenol, making them produce reaction with formaldehyde to synthesize A-stage mixed alkyl phenolic resin, then using rosin to make modification and using polyhydric alcohol to make esterification. Said invention is easy to operate, safe, and its resin oil-solubility and fatty hydrocarbon solubility are good. Its colour islight and softening point is high. The printing ink made up by using said invented product does not skin, and possesses good printing property.

The invention discloses a nanometer single-component flexible epoxy compound for magnetic core adhesion. The nanometer single-component flexible epoxy compound for magnetic core adhesion comprises thefollowing components in parts by mass: 100 parts of epoxy resin, 4 to 30 parts of a curing agent, 4 to 20 parts of an accelerant, 0 to 5 parts of color paste, 3 to 60 parts of tetrafunctional organosilicon modified epoxy resin, 1 to 20 parts of nanometer rubber core-shell, 0.05 to 0.2 part of a defoaming agent, 0 to 0.2 part of a coupling agent, 0 to 0.2 part of a dispersing agent, 1 to 30 partsof a thixotropic agent and 10 to 300 parts of fillers. The invention also provides a preparation method of the single-component epoxy resin compound. The nanometer single-component flexible epoxy compound for magnetic core adhesion has the following advantages: the viscosity is low and the adding amount is small; the functionality degree is high, the adhesion can be improved and the linear expansion coefficient can be reduced; the brittleness of a Si-O bond in the curing process is lower than that of a C-C bond multifunctional diluent.

The invention discloses a water-based aluminium foil glue composition with high peel strength and controllable viscosity and a preparation method. The water-based aluminium foil glue is formed by compounding water-based styrene-acrylic emulsion and dispersion liquid of polyvinyl alcohol. The peel strength can be as high as 12N / (25mm), and the viscosity (100-30000mpa.s) is controllable. The water-based aluminium foil glue comprises the following components: 15-25% of soft monomers, 10-20% of hard monomers, 1-5% of functional monomers, 0.2-0.8% of initiator, 1-4% of emulsifiers, 0.2-1% of PH buffer agent, 1-4% of PH agent, 50-80% of softened water and 5-30% of polyvinyl alcohol dispersion. The glue has strong blue light, excellent bonding capacity and controllable viscosity, is environment-friendly, is relatively low in cost, is easy to dry, has freezing resistance and does not contain plasticizers or harmful substances.

The invention relates to an efficient energy-saving environmental-friendly unit type photogravure press used for air temperature adjustment of the unit type photogravure press self as well as an energy-saving environmental-friendly method. The photogravure press comprises a unit type photogravure press, an air conditioning plant is arranged between units requiring constant temperature of the unit type photogravure press, a hot wind outlet arranged on the upper part of the air conditioning plant is communicated with an inlet of a drying box body in the unit type photogravure press, a cold wind outlet on the lower part is positioned below the unit in the unit type photogravure press. The invention has the advantages of high cost performance, can realize seamless butt joint with the traditional technology and saves electricity for 56% if compared with products with the same grade on the basis of satisfying the normal function of printing machinery and national environmental protection requirement and has obvious energy saving effect; the environmental impact assessment index is obviously lowered; the efficient energy-saving environmental-friendly unit type photogravure press can realize seamless butt joint with the technology and craft of the existing printing mechanical products under the condition that performance is greatly improved, and also can be used for energy saving modification of printing machinery with low energy efficiency ratio.

The invention discloses a soybean-based protein adhesive and a preparation method thereof. The invention first discloses the soybean-based protein adhesive which is prepared from the following raw materials in parts by weight: 50 to 100 parts of soybean meal, 5 to 15 parts of alkali, 5 to 30 parts of urea, 20 to 100 parts of cross-linking agent and 50 to 300 parts of water. The invention further discloses the preparation method for the soybean-based protein adhesive. Since defatted soybean meal sold in the market is adopted as the main raw material of the soybean-based protein adhesive disclosed by the invention, the cost is far lower than the cost of soybean protein isolate. Because the content of soybean-based protein solid in the soybean-based protein adhesive is high, reaching 40 to 55percent, the energy consumption of drying in the process of artificial board production can be reduced, and cost can be reduced. Moreover, the viscosity of the soybean-based protein adhesive disclosed by the invention is controllable, the bonding strength is high, and the soybean-based protein adhesive can be used in the production of artificial boards, such as plywoods, shaving boards, medium density fiberboards and blockboards.

The present invention relates to an inorganic adhesive composition and to a hermetic sealing method, and more specifically relates to an inorganic adhesive composition with which an organic solvent is not used and to a hermetic sealing method using same. To this end, the present invention provides an inorganic adhesive composition comprising: between 20 and 80 parts by weight of a water glass diluted solution containing between 60 and 90 parts by weight of water glass (Na2SiO2); between 20 and 80 parts by weight of a refractory inorganic filler; and a black pigment.