• 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:
    1436522 Cementitious compositions BAYER AG 1 March 1974 [2 March 1973] 9320/74 Heading C1H [Also in Division C3] Foam concrete is produced from a mixture comprising 10-80% by weight of aqueous alkali metal or ammonium silicate solution, 10-80% of organic polyisocyanate and 10-80% of a water-binding substance such as Portland cement, lime, blast furnace cement, pozzolana cement, gypsum, synthetic anhydrite, or quick setting cement. Extensive lists are given of suitable polyisocyanates, surfactants, foam stabilizers, set retarders, volatile liquids or metals as blowing agents, organic and inorganic phosphates as flame retardants. In examples the polyisocyanates used are sulphonated polyphenyl - polymethylene - polyisocyanate and a residue from the distillation of tolylene diisocyanate; triethylamine and N,N,N-(#-dimethylamino-n-propyl) hexahydrotriazine can be used as catalysts; other components included in the compositions listed in the examples are trichloromethane as blowing agent, sodium salt of sulphochlorinated C 10-14 paraffin mixture as emulsifier, perchlorinated paraffin, potassium sulphate, glass fibres, tris-(chloro-ethyl)phosphate and aqueous sodium silicate.
    公开号:SU727132A3
    申请号:SU731984193
    申请日:1973-11-30
    公开日:1980-04-05
    发明作者:Дитерих Дитер；Маркуш Петер
    申请人:Байер Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to building materials, namely, foam concrete compositions and can be used to obtain heat insulating products. Raw mixtures for the manufacture of thermal insulation products are known, including polymeric binder and porous polymeric fillers 1 and 2. The disadvantage of these compositions is relatively high brittleness and low thermal insulating properties. Closest to the invention in its technical essence and the achieved result is foam concrete, including the mineral in the thick siliceous aggregate, water and organic compound. Polyisocyanates are used as an organic compound in the amount of 7.25-50% by weight of solid components of 3. The above composition of foam concrete system, as well as the previous ones, does not allow to obtain foam concrete with high strength and thermal insulation properties. In addition, foam concrete from a known mixture has a relatively low fire resistance. The aim of the invention is to increase the fire resistance and strength properties of foam concrete. This is achieved by the addition of a concrete mixture containing polyisocyanate, mineral binder and water, which additionally contains a 25-54% aqueous solution alkali metal silicates in the following ratio of ingredients of the mixture, in wt.%: Polyisocyanate10-50 Mineral in the gore 20-70 25-54% aqueous solution of alkali metal silicates 20-70 Aliphatic is used as polyisocyanate Kie, cycloaliphatic, araliphatic, aromatic and heterocyclic polyisocyanate compounds. Slag Portland cement, Portland cement, quick-setting cement, sulphate-resistant cement can be used as minerals in the living. As aqueous solutions of alkali metal silicates, silicate sodium or potassium solu tions are used at a molar ratio of Na2O: SiO2 of 1: 1.6 to 3, 3. The mixture preparation technology for the manufacture of foam concrete consists of the following operations. The starting components are mixed. The resulting mixture is discharged into molds where it foams, turning into foam concrete. The proposed foam mixture can be illustrated by the following examples. Example 1. A 43% by weight of sulphonated polyiso cyanate is mixed at a temperature of 18-25 ° C with 22% by weight of quick-setting cement a. Then, while stirring, 35% by weight of a 44% aqueous solution of sodium silicate is added. The mixture was mixed for 40 seconds in a high speed mixer. The reaction mixture is poured into a detached box-like form, where it begins to foam in 60 seconds and, after 100 seconds, sets in, turning into foam concrete with high strength and proper cellular structure. The properties of the resulting foam concrete are the following s „Volume weight, kg / m180 Compressive strength limit, kgf / cm 12.6. Coefficient of thermal conductivity , ; kcal / m-h ° С 0.050 Number of open nopj% .92 Water absorption,% 13-14% by volume Example 2, Stirring 40% by weight of sulfonated polyisoate at temperature 18-25 ° С from 25% "% fast-setting cement; Further, with stirring, adding 35% by weight of a 44% aqueous solution of sodium silicate. The mixture is stirred for 15 seconds, after 32 seconds, it foams, and after 55 seconds, it sets. Its properties are as follows: Bulk density, Compressive strength, kgf / cm 19.1 Example 3. 44 wt.% Sulphonated polyieo cyanate {containing 15% wt. NCO i-pyrin) is mixed with 30 wt.% 6HCTpocxBaTtJBaro iiero cement. Further, 26% by weight of a 44% aqueous solution of sodium silicate is added with stirring. The mixture is stirred for 13 seconds, foaming occurs after 15 seconds and the mixture sets after 45 seconds. Properties of foam concrete obtained in Example 3. ,, Volume weight, kg / m348 Strength, in compression, kgf / m 20 The proposed foam concrete mixture is characterized by increased fire resistance of foam concrete. In addition, the advantage of the proposed composition is a short mixing time, as well as fast setting. The proposed foam concrete mixture allows to obtain foam concrete with closed or open pores with a bulk density of 100 to 800 kg / m and a compressive strength of 5 to 150 kg s / cm. Formula of the invention Foam concrete mixture, including polyisocyanate and mineral water and water , characterized in that, in order to increase the fire resistance and strength properties of foam concrete, it contains an additional 25-54% solution of alkali metal silicates in the following ratio of ingredients in the mixture, wt.%: Polyisocyanate 10-50 Mineral in Suspension 20 -70 25-54% in One solution of alkali metal silicates 20-70 Sources of information taken into account during the examination 1. USSR author's certificate No. 471348, cl. From 04 to 25/02, 04.10.73. 2. USSR author's certificate number 446485, cl. From 04 To 25/02, 12.07.72. 3. Patent of the USSR f 430539, cl. C 04 B 25/02, 04/30/69.
    权利要求:
    Claims (1)
    [1]
    Claim
    Foam concrete polyisocyanate and water, a mixture and a mineral binder, which, in order to increase the fire resistance and strength properties of foam concrete, it contains an additional 2554% solution of alkali metal silicates, with the following ratio of quick-setting chain mixing, add 44% aqueous solution of sodium. The mixture is mixed
    40 wt.% Sulfonated polyisocyanate at a temperature of 18-25 ° C
    25 zes.% Ment.
    Further
    35 wt.% Of silicate within 15 seconds after 32 seconds it foams, and after 55 seconds it sets.
    Its properties are as follows:
    Bulk weight, kg / m 3
    The compressive strength, kgf / cm 2 Example 3.
    44 wt.% Sulfonated polyeo-ingredients in a mixture, Polyisocyanate Mineral binder
    25–54% aqueous solution of alkali metal silicates in f s,%:
    10-50
    20-70
    20-70
    235
    19.1
    Mix
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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
    DE2310559A|DE2310559C3|1973-03-02|1973-03-02|Foam concrete, a process for its manufacture and its use for the manufacture of building elements|
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