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    • 105. 发明专利
    • FLUORORESIN-IMPREGNATED CARBONACEOUS MATERIAL AND ITS PRODUCTION
    • JPH06234583A
    • 1994-08-23
    • JP6241593
    • 1993-02-10
    • TOYO TANSO CO
    • TOJO TETSUROKURODA KOJI
    • C01B31/00C04B35/52C04B41/48C04B41/83C08F14/18
    • PURPOSE:To obtain a material revealing high environment breaking performance for a long period of time by impregnating a carbonaceous material whose open porosity and average pore radius are limited with fluororesin heated and melted in a pressure vessel and applying pressure at which a specified impregnation ratio is obtained to it. CONSTITUTION:Fluororesin which is melted at 80-250 deg.C is heated and melted in a pressure vessel and a carbonaceous material of 5-20% open porosity and 0.1-2.5mum average pore radius is immersed in the molten fluororesin. Next, the pressure vessel is set at the pressure at which the impregnation ratio of the fluororesin is >=20% to obtain an object material. The higher the open porosity, the more quantity of impregnatable fluororesin to the whole carbonaceous material is increased. When the open porosity is less than 5%, the improvement of environment breaking performance such as water-repellency and nontackiness is not expected. On the other hand, when the open porosity exceeds 20%, the impregnatable fluororesin is increased, but nonuniformity in the impregnation is apt to be occurred to cause a part lacking in the environment breaking performance. The average pore radius is a factor of determining the easiness of the impregnation of the fluororesin.
    • 107. 发明专利
    • JPH06502814A
    • 1994-03-31
    • JP51807891
    • 1991-10-16
    • A23L3/3436A61K9/70A61M1/22B01D67/00B01D69/14B01D71/38B01J20/32B32B5/18B32B27/30B41M5/52B41M7/00B65D65/02B65D65/38B65D81/26C04B41/48C04B41/83C08J7/04C09D129/04C12N11/08C25D17/00C25D21/06H01M2/16A61M1/34
    • Articles having a complex geometric configuration have hydrophilicity imparted to at least a portion of surfaces of the articles while substantially retaining the complex geometric configuration. The hydrophilicity is imparted by an extremely thin, self-interlocking shell of tactic, hydrophilic poly(vinyl alcohol) enveloping the surfaces. A tactic poly(vinyl alcohol) precursor applied to surfaces of the supporting structure is reacted in situ on the surfaces with a hydrolysis reagent to prepare the tactic, hydrophilic poly(vinyl alcohol) shell. The article having the hydrophilic shell is highly resistant to solvent washout. Hydrophilicity and hydrophobicity can be reversibly provided on regio-specific surfaces of the article. Articles in the form of membranes useful as filters, residue barriers for electroplating devices, separators for electrochemical cells, and drug delivery device components are also described. Membranes to form permanent and undistorted images, and methods of preparing such images from image-forming substances in receptive media are also provided. Hydrophilic porous supporting structures loaded with an enzyme system which catalyzes a reaction of a substrate, oxygen, and if necessary, water or moisture to consume oxygen are also described for oxygen scavenging in packages containing oxygen sensitive products.
    • 110. 发明专利
    • PRODUCTION OF SURFACE-MODIFIED INORGANIC POWDER
    • JPH0656561A
    • 1994-03-01
    • JP23646392
    • 1992-08-11
    • SHIKOKU CHEM
    • SHIRAKAWA YUKITATSUOGAWA SHOGO
    • C04B41/85C04B41/82C04B41/83C04B41/84
    • PURPOSE:To enhance mechanical property by adding a silicate ester and a silane coupling agent to inorganic powder, mixing and forming a thin film consisting of a polycondensation product of a silicic acid and the silane coupling agent on the surface of the inorganic powder. CONSTITUTION:One kind among inorganic powder of CaCO3, SiO2 and Al2O3, etc., excluding AlBO3 was dispersed in water to form a slurry, 0.5-10.0wt.%, based on the inorganic powder, of silicate ester such as ethyl silicate and 0.2-6.0wt.%, based on the same, of silane coupling agent such as gamma-glycidoxy propyl trimethoxy silane are added into the slurry and stirred for a specified time. Later, the slurry is filtered and the solid is separated from the liquid and dried in a unwashed state, and then the inorganic powder on whose surface a polycondensation product layer of the silicic acid as a hydrolysis product of the silicate ester and the silane coupling agent has been coated and whose surface has been modified is obtained. When the product is compounded to a resin as a filler, a composite material excellent in mechanical performance is obtained.