• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    THE METHOD OF OBTAINING THE SHEET MICROPORATIC MATERIAL by mixing powdered polytetrafluoroethylene with a solid blowing agent — calcium carbonate and lubricant, forming a layer, compacting it, heat treating at 100-250 ° C, increasing the temperature to 340-360 ° C; C, heat pressing at 340-360 ° C; C for 90-210 min., Cooling, leaching of the pore-forming agent, followed by drying, characterized in that, in order to increase the porosity of the material, a fluorine-containing surfactant of the formula F, C (CF2) n, CHj CHj 0 (CHj 0) H where n 6-19; m 3-19 ,. I in the amount of 5-30 wt.%, And the seal is carried out multiple
    公开号:SU1105120A3
    申请号:SU792746904
    申请日:1979-03-30
    公开日:1984-07-23
    发明作者:А.Лазарз Кристин；Х.Кук Эдвард (Младший)；В.Скрипа Лейслейф
    申请人:Хукер Кемикалз Энд Пластикс Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    11 Invention of OTHOCHTCJ for cr (5 for the production of microporous sheet metal (material. A method for the production of sheet microporous material is known; mixing of powdered polytetrafluoroethylene with a solid porous substrate, such as calcium, for example calcium, and paraffin, kerosene and other lubricants, forma tive material. heat treatment at 100–250 ° C, by temperature piping to 340–360 ° C and thermally pressing the layer at this temperature for 90–210 mN; cooling, for example, to room temperature, is evaporated on a call metal carbonate bodies, for example, treatment with a yodite – iodine-treated porous material, characterized by low filtration properties due to insufficient porosity (70% porosity). The purpose of the invention is to understand the porosity of the material and, itself, to improve its filtration and X properties; It is ascertained that, according to the method, a listow microporous CMC material is obtained by sewing a polytetraf-ethylene powder with solid porous foam calcium carbonate and lubricant, forming a layer. ynJiOTHCHiieM it, by heat treatment at 100-250 ° C, lowering the temperature to 340-360 ° C, thermal pressing at 340-350 ° C for 90-210 min by cooling; BI Is by alkalizing a pore-forming agent with a subsequent drying; a fluorine-containing surfactant form is used as a lubricant. F, C (CF,) CH, CH, 0 (CH, 0), H (3, ..., f FSN where p 6-19; t 3-19, in the amount of 5-30 May,% e, the compaction is carried out by repeated rolling of a layer through rolls (13-25). The surfactant used presents a mixture of polymers of the specified form ry Example 1 - 3, 50 g of polytetrafluoroethylene (TefloEg) powder is mixed with 247 g of carbonic acid. The teflon powder had an average particle diameter of 500 MKM5, while calcium carbonate had iominal C3. p about μm. These materials) have been diagnosed for o / UK-t-: minutes in the mixer with; V-sabr; iM i blades, then; 1 add; | P lubricant .. According to the example of DG) they add n p1 to ten milliliters ;; .-); o (; Hiia, according to example 2 - dchad LUiTT, five. PITERS FLETORISTGS : Surfactant 3 (-HHJi FSN, according to example 3 fifty-five mil, 1i-1 liter of fluoride surfactant Zni-t - i-SN. After: le add a penny of fluoride fluoride mixture surfactant mixture mix Ijv g- five minutes, The first mixture was obtained: -, then they roll between dvvum valki roll roller Mej: bimHb, Material: p1; at: .1sleep 23 bits to get (:; nachate, g; dnoy TiiJiiuHHiii 26-27 mil; hp) 1), 13 times up to tol; tsiny 1F (-JM (; ipviMfc) 2) 5 to 25 times to tolpa 1 ;,; (prgtmer 3) “In Example 1, pr: -; and iHiMciiOHiiii KcpociiHa during operations ;; sparks were abundant, Tahie s a; the natural discharge 1 was not observed / when using fluorine surfactant in rig-0x 2 and 3. Sheet fiocjK materials : thinning to the specified tol: innostere H - digging from; correspondingly, up to 340 ... 350 or 360 ° C for sintering, p,: c polytetrafluoroethylene. The sintering temperature is maintained for a period of 90, 150, 210 minutes. After the OHD Proccal, a sheet of polytetrafluoroethylene is then subjected to a flush after successively with the help of hydrochloric and nitric acid solutions with the aim of removing calcium carbonate. After washing and sequencing and leaching and washing operations, the polyurethane foam polystyrene separator is tested for porosity by mercury intrusion. For examples t-3, respectively, porosity values of 80.6, 80, 3, and 86–3% were found. The properties of the mixture depend on m .: :) Ste on the type and amount of lubricant. Prive. Prices in the table. one . As can be seen from the table, I ,, equivalent porosities can be obtained using less fluoride surfactant compared to kerosene in example 1, and test ncipHST test - using the same amount of fluoride ,, as kerosene5, which also indicates the best technological centroids to process
    Example 4. Sheet materials obtained in accordance with examples 1-3, experience in the chlorine electrolyzer. Samples are used in a standard two-chamber glass minielectrolyzer operating at 85-95 C. The anolyte is circulated with acidified brine at pH 4.0. Catholyte was 100 g per 1 liter of sodium hydroxide. The initial voltage for the cell was determined at 1.5ASI and alkali concentrations are indicated. The cell is put into operation, the cell voltage is determined at different times and the current output is calculated. The results of this experiment are shown in Table. 2
    Examples 5-7. 50 g of polytetrafluoroethylene powder is mixed with calcium carbonate and various amounts of Zonil ® FSN - fluoride surfactant. Calcium carbonate had a particle size of the order of 61-74 µm, while the average particle size of the polytetrafluoroethylene was 35 µm. For examples 5 and 6, the porosity is measured, and all samples are tested in a glass mini-electrolyzer, as in Example 4. The results of these tests are shown in Table 3.
    Examples 8-13. Using the technology described in examples 1-3, additional membranes are obtained using a wide variety of lubricants, as described in table. four.
    50 g of Teflon-Fluoropolymer 6 is mixed with 247 g of non-wetted calcium carbonate. The lubricants used are: Zonyl® FSB, amphoteric fluoride surfactant, known as fluoroalkyl-substituted betaine (examples 8, 9) Zonnp ® FSC, tertiary cationic amine, referred to as dimethyl sulfate, forming a quaternary base with a substituted fluoroalkyl (example 10); Zonil® FSP, anionic fluoride surfactant, designated as ammonium salt of fluoroalkyl phosphate (example 11), Triton X-101 - fluorinated phenoxypolyethoxyethanol - surfactant (example 11).
    For comparison with example 3 with the aim of
    demonstration of unexpected improvement achieved through the use of a special non-ionic fluoride PAE Zonil ® FSN. The results are shown in Table. four.
    Examples 1 and 2 clearly illustrate the particular nature of the invention, with a clear demonstration that not all fluoride surfactants produce satisfactory results. In the examples
    demonstrated the superiority of non-ionic fluoride surfactant of the specified formula compared to anionic, ionic and amphoteric fluoride surfactants and conventional nonionic surfactants, for example
    kerosene.
    Table 1
    Kerosene 50 (10%)
    Stage valtseva
    Dry mix
    1. Up to small vanilla beds
    Zonil F5N
    Zonil FStJ
    25 (5%)
    50 (10%)
    Half dry mix. I feel small lumps of moisture, small lumps
    Low, the sample remains in powder form and crumbles, requires a lot of processing to produce a sheet.
    Moderate, some cracks are observed
    Low, the sample is brittle, it is difficult to roll, as the rolls are clamped
    Continued table. one
    High, the material turns into a text sheet.
    Moderate, observable; Excellent, separate tears are easily dropped
    Excellent, no vibration of VSSHKOV, a uniform sheet is obtained
    table 2
    Number of ml (%) 50 (10%)
    Rolling number
    T is desirable, sensitive to moisture, small lumps
    Table 3
    50 (10%)
    75 (15%)
    24
    Colorless, weak, small lumps, partially in powder form,
    unpleasant fish 3 ap ah
    Extremely weak. Inability to form a sheet, considerable powderiness, flakeiness, poor adhesion
    3c Gradual thinning: the ability to rolling
    4. Ability passes rolling
    5 "The ability to milling at
    consecutive passes
    Number of rollers
    Moist, small lumps, a lot of powder
    Is low. Tears easily on
    lanes that cannot be easily connected to one another. A lot of waste
    Weak, torn into strips 1, rough look
    Average, obvious layering, wrinkles and tears
    Low, the sample becomes rigid, breaks, holes, waviness, vibration in rolls
    25
    Heavy, sensitive to moisture, small lumps 2. First Weak, sample passage: being able, in large part, to form a sheet and loose powder, requires a lot of processing to obtain a rather fragile sheet.
    Weak, easily broken, stratification
    Moderate. The specimen becomes more rigid, cracks and cracks are observed.
    Is weak. The sample becomes brittle, there are cracks, gaps along the edges.
    Excellent, easy rolls
    Excellent, absence of vibradium in rolls, a uniform sheet is obtained
    Excellent, no resistance to milling, a uniform sheet is formed Medium, Sample High, the material is rolled into a form turning into small pieces, a visible sheet that can take on a brittle sheet shape
    权利要求:
    Claims (1)
    [1]
    METHOD FOR PRODUCING SHEET MICROPOROUS MATERIAL by mixing powdered polytetrafluoroethylene with a solid blowing agent - calcium carbonate and grease, forming a layer, compacting it, heat treating it at 100-250 ° C, raising the temperature to 340-360 ° C, heat pressing at 340-360 ° C for 90-210 min, cooling, leaching of the blowing agent with subsequent drying, characterized in that, in order to increase the porosity of the material, a fluorine-containing surfactant of the formula is used as a lubricant
    F 2 C (CF 2 ) m CH 2 CH 2 0 (CH 2 0) n H where η = 6-19;
    m = 3-19, § in an amount of 5-30 wt.%, and compaction is carried out by multiple (13-25 times) rolling the layer through the rolls.
    SU <u 1T05120
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    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/891,987|US4170540A|1978-03-31|1978-03-31|Method for forming microporous membrane materials|
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