455 results about "Hygroscopicities" patented technology

The invention discloses a corrosion-resistant hygroscopic coat and a preparation method thereof. The coat comprises an upper layer and a lower layer, wherein the lower layer is a corrosion-resistant ground coat, and the upper layer is a hygroscopic surface coat. The preparation method of the coat comprises the steps of: (1) coating water-based corrosion-resistant ground paint A on a base material, and drying the paint A to form a corrosion-resistant ground coat with the thickness being 0.1-5.0g/m<2>; and (2) cooling the corrosion-resistant ground coat, coating water-based corrosion-resistant ground paint B on the corrosion-resistant base coat, and drying to form a hygroscopic surface coat with the thickness being 0.5-100g/m<2> so as to obtain a corrosion-resistant hygroscopic coat on the base material. The invention is simple in preparation process, suitable for continuous production, high in production efficiency, and environment-friendly, so that the good binding force is formed between the formed coats and the base material and among the coats, and obtained material is good in hygroscopicity, corrosion resistance and heat transfer, attractive in appearance, stable in performance, and suitable for the preparation of a rotating wheel of a dehumidifier.

The invention relates to the technical field of pouring sealant, in particular to modified epoxide resin pouring sealant and a preparation method of the modified expoxide resin pouring sealant. The modified epoxide resin pouring sealant achieves improvement based on the prior art. The pouring sealant is composed of a component A and a curing agent. The weight ratio of the component A to the curing agent is 100 to 3-15, wherein the component A comprises, by weight, 1.0-8.0% of thinner, 25.0-39.0% of nano filler, 0.5-4.5% of flexibilizer, 0.08-0.45% of coupling agent, 0.08-0.45% of pigment, and the balance grapheme modified epoxide resin, and the total weight is equal to 100%. Compared with the prior art, due to addition of the grapheme modified epoxide resin and the nano filler, the pouring sealant is capable of improving high and low temperature resistant impact properties, capable of reducing hygroscopicity and a dilatation coefficient, capable of prolonging storage time, capable of strengthening dehiscence resisting capacity, and capable of having great value of industrial application.

The invention provides a preparation method of silk-like fabric, which comprises the steps: selecting natural cellulose and modified polyester, preparing yarns, warping, sizing, drafting, weaving anddesizing to obtain the silk-like fabric. The silk-like fabric retains the advantages of good hygroscopicity, high melting resistance, heat insulation and antistatic property in natural cellulose, andalso has the performances of stable size and high elasticity in polyester, and in addition, the fabric far exceeds the natural silk in terms of gloss and hand feeling. The preparation process of the method is simple, the cost is low, and a product with high added value can be attained. The method is suitable for large-scale popularization in industry.

The invention provides a dexrabeprazole sodium monohydrate crystal form. The invention is characterized in that the dexrabeprazole sodium monohydrate crystal form has characteristic diffraction peaks at 10.5, 13.4, 17.1, 18.0, 18.5, 18.9, 19.5, 23.0, 23.3, 27.1 and 31.6 degrees in an X-ray powder diffraction spectrum represented by Cu-Kalpha radiation and 2theta; and an absorption peak exists at about 148.27 DEG C in a differential thermal analysis atlas of the dexrabeprazole sodium monohydrate crystal form. The crystal form has relatively high stability, solubility and dissolution, and relatively low hygroscopicity. The invention also provides a preparation method for the dexrabeprazole sodium monohydrate crystal form. The preparation method is simple, high in yield and low in preparation cost, and the quality of products is high.

The invention provides an oily liquid and oil state dust preventive composition, a preparation method and purpose for preventing dust from flying. The dust preventive composition comprises the following components per 100 parts by weigh of oily solution: 50-80 parts by weight of oily liquid acrylamide copolymerized high-molecules prepared by copolymerization of acrylamide monomers, and 2.0-10.0 parts by weight of surfactant with emulsification and dispersion functions, and 5.0-30.0 parts by weight of hygroscopic oil with dispersion and moisture evaporation inhibition function, and 0.2-10.0 parts by weight of one or two kinds of natural high-molecules with good dust adhesion strength or adhesion maintenance force. In the yellow sand region, tunnel, subway, mine, coal storage field, sand storage field, road and building sit with many dust, and a certain amount of dust composition can be diluted and stirred in water for sprinkling, because of differences of adsorption, viscosity, density and polarity, after the composition is coated on flying dust surface, the dust, the granular form dust and fine dust and other dusts can be prevented from flying.

The invention relates to a preparation method of a knitted wool-like warm fabric. The preparation method comprises the following steps: (1) raw material selection; (2) spinning technology implementation; (3) weaving technology implementation; (4) printing, dyeing and after-finishing. The knitted wool-like warm fabric is formed by performing the after-finishing, such as knitting, dyeing, carbon grinding and softening, on hemp/cotton/polypropylene fiber blended yarns and polyolefin elastic fibers, namely confirmable elastic fibers, which serve as raw materials. By the adoption of hemp, a product can realize antibacterial, health care and anti-ultraviolet functions; cotton fibers are high in hygroscopicity and spinnability; the polypropylene fibers are poor in heat conductance and high in heat insulation property; by the blending of the three types of fibers, a product has the functions of heat insulation, moisture absorption, breathing, bacteria prevention and ultraviolet resistance; by the weaving of the polyolefin elastic fibers, the product is extremely high in elasticity and conformality. The product is soft, fine, breathable, relaxing, high in heat retention property and suitable for making high-end warm coats or skirts, is a high-quality antibacterial, health care and warm fabric which has a wide market development prospect.

The invention provides a calcium alginate-graphene oxide nanofiber and a preparation method and a drug-carrying calcium alginate-graphene oxide nanofiber and relates to the technical field of nanofibers. The preparation method of the calcium alginate-graphene oxide nanofiber comprises the following step: carrying out microfluidics spinning on a mixed solution of calcium alginate and graphene oxideand a calcium chloride solution, thereby obtaining the calcium alginate-graphene oxide nanofiber. The technical problem that a sudden drug release phenomenon is caused as a conventional calcium alginate nanofiber is good in hygroscopicity and low in mechanical strength is alleviated. By adopting the preparation method provided by the invention, the graphene oxide is put into raw materials, so that the calcium alginate-graphene oxide nanofiber has hydrogen bond interactions with oxygen-containing groups on a graphene oxide sheet and hydroxyl in calcium alginate molecules, the hydrogen bond function of the calcium alginate and water molecules is weakened, the swelling velocity of the calcium alginate is reduced, and the sudden drug release phenomenon can be prevented.

The invention belongs to the technical field of macromolecular materials and particularly relates to a benzocyclobutene functional groups-contained benzoxazine monomer and a synthetic method and a use thereof. According to the synthetic method, amino-contained benzocyclobutene, phenolic compounds and formaldehydes (or paraformaldehydes) are adopted as raw materials, and the target monomer is obtained through synthesizing by adopting a solvent method or a solvent-free method. The benzoxazine monomer has lower viscosity at a certain temperature and can be cured through a method of heating or catalyzing by a catalyst. The obtained resin after curing has excellent thermal stability, mechanical properties, and extremely-low hygroscopicity, and thus, the resin can be used as an electronic packaging material, a high-temperature resisting and flame-retarding material, a high-performance composite material, an aerospace material and the like.

The invention discloses an empty capsule and a preparation method thereof. The empty capsule is high in stability, good in medicine compatibility and free of mutual effect. The empty capsule disclosed by the invention is low in water content and high in hygroscopicity resistance, so that content is unlikely to cake, and the shell of the capsule is unlikely to deform, harden and crisp for disintegration. The empty capsule has low requirements on storage conditions, does not crisp in low humidity environments and has good stability at a high temperature, and the body of the capsule does not deform. The raw materials of the empty capsule come from non-animal sources, thus no potential risk of accumulated growth hormone or medicine remaining in animals exists, and the empty capsule accords with the requirements of vegetarianism, special culture and religion.

Provided is a moisturizer having hygroscopicity and water retention ability, and also provided is a composition superior in antiseptic property and feeling on application, in addition to moisturizing property, and free of coloration and odorization.

A moisturizer containing acylproline represented by the formula (1)

wherein an acyl group represented by R¹—CO— is an acyl group derived from a saturated or unsaturated fatty acid having 3-23 carbon atoms, or a salt thereof, and a composition containing (A) acylproline represented by the above formula (1) or a salt thereof and (B) bisphosphonate.

The invention relates to an optical resin for an optical protective film and a preparation method thereof. The optical resin for the optical protective film is prepared from the following components in parts by mass: 50-90 parts of a methyl methacrylate polymer, 10-50 parts of a heat-resistant stabilizer, 0.2-4.0 parts of a compatibilizer and 0.3-6.0 parts of a lubricant. The heat-resistant stabilizer is copolycarbonate micro powder. The preparation method of the optical resin for the optical protective film comprises the steps of preparation of the heat-resistant stabilizer, preparation of anoptical resin master batch, preparation of the optical resin and the like. The method is simple in process, low in energy consumption and easy to realize industrialization. Compared with PMMA opticalresin produced in the prior art, the prepared optical resin for the optical protective film has outstanding heat-resistant stability and toughness, relatively low hygroscopicity and volume resistivity and less surface static electricity and is not easy to adsorb dust on the premise of ensuring basic physical and mechanical properties and optical properties.

The present invention is directed to crystals of P<1>-(2'-deoxycytidine 5'-)P<4>-(uridine 5'-)tetraphosphate (dCP4U) or a salt thereof and to a process for producing the crystals. The present invention also provides a process for producing dCP4U involving reacting uridine 5'-monophosphate (UMP), 2'-deoxycytidine 5'-monophosphate (dCMP), diphenyl phosphochloridate (DPC), and pyrophosphate (PPi). The crystals of dCP4U obtained through the process according to the present invention have high purity and high stability and no hygroscopicity as compared with a freeze-dried product, and thereby serve as a useful raw material for preparing a pharmaceutical. The process for producing dCP4U according to the present invention permits use of inexpensive UMP as a raw material and realizes high yield. Thus, the process is suitable for large-scale synthesis of dCP4U.

The invention provides a novel functional graphene composite fiber, and a preparation method and an application thereof. The preparation method comprises the following steps: 1, adding graphene nano-sheets into a molten polymer material, and carrying out melt mixing to uniformly mix the graphene nano-sheets with the polymer material in order to obtain a mixture A, wherein 100 wt% of the mixture A contains 20-30 wt% of the graphene nano-sheets; 2, granulating the mixture A to obtain graphene composite master batches; and 3, carrying out melt mixing and spinning on the graphene composite master batches and the polymer material to obtain the novel functional graphene composite fiber, wherein 100 wt% of the novel functional graphene composite fiber contains 1-4 wt% of the graphene nano-sheets. The invention also provides the novel functional graphene composite fiber prepared through the preparation method. The graphene composite fiber has certain strength, softness and hygroscopicity.

GaTe semiconductor is used as a room-temperature radiation detector. GaTe has useful properties for radiation detectors: ideal bandgap, favorable mobilities, low melting point (no evaporation), non-hygroscopic nature, and availability of high-purity starting materials. The detector can be used, e.g., for detection of illicit nuclear weapons and radiological dispersed devices at ports of entry, in cities, and off shore and for determination of medical isotopes present in a patient.