Compositions for use in concrete

A technology for strengthening concrete and formulations, applied in coating, transportation and packaging, thin material handling, etc., can solve the problems of calculating spun tensile strength/loading performance of reinforced fabrics, etc.

Inactive Publication Date: 2007-05-02
BAYER MATERIALSCIENCE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In paper entitled "USE OF ADHESIVES FOR TEXTILE-REINFORCED CONCRETE", S.Bhm, K.Dilger and F.Mund, 26th, Annual Meeting of the Adhesive Society in Myrtle Beach, SC, USA, February 26, 2003 , demonstrating that the calculated spun tensile strength / load properties of reinforced fabrics are not achieved in concrete

Method used

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  • Compositions for use in concrete
  • Compositions for use in concrete
  • Compositions for use in concrete

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] The preparation of polychloroprene has been known for a long time and is preferably carried out by emulsion polymerization in alkaline aqueous medium: see "Ullmanns Encyclopdie der technischen Chemie", Vol. 9, p. 366, Verlag Urban und Schwarzenberg, Munich - Berlin, 1957; "Encyclopedia of Polymer Science and Technology", Vol. 3, pp. 705-730, John Wiley, New York, 1965; "Methodender Organischen Chemie" (Houben-Weyl) XIV / 1, 738ff. Georg Thieme Verlag Stuttgart 1961.

[0052] Suitable emulsifiers include all compounds and mixtures thereof which stabilize emulsions to a sufficient extent, such as water-soluble salts, especially sodium, potassium and ammonium salts of long-chain fatty acids, rosin and rosin derivatives, high molecular weight alcohol sulfates, Arylsulfonic acids, formaldehyde polycondensates of aromaticylsulfonic acids, nonionic emulsifiers based on polyethylene oxide and polypropylene oxide, and polymers as emulsifiers, such as polyvinyl alcohol (DE-A 2 307 ...

Embodiment 1

[0079]The aqueous phase (W) and the monomeric phase (M) are discharged into 7 identical reactors with a capacity of 50 liters together with the catalyst phase (A) in a constant weight ratio through a measuring and controlling device Composition of the polymerization grid (cascade) of the first reactor. The average residence time per can was 25 minutes. The autoclave corresponds to that described in DE-A 2 650 714 (data are expressed in parts by weight per 100 parts by weight of monomers used).

[0080] (M) = monomer phase:

[0081] Chloroprene 100.0 parts by weight

[0082] 0.11 parts by weight of n-dodecylmercaptan

[0083] Thiodiphenylamine 0.005 parts by weight

[0084] (W) = water phase:

[0085] 115.0 parts by weight of deionized water

[0086] Disproportionated abietic acid sodium salt 2.6 parts by weight

[0087] Potassium hydroxide 1.0 parts by weight

[0088] (A) = catalyst phase:

[0089] 1% formamidine sulfinic acid solution 0.05 parts by weight

[0090] P...

Embodiment 2

[0097] The same procedure as in Example 1 was used, but the concentration of regulator in the monomer phase was reduced to 0.03 wt.%.

[0098] The solid content is 33wt.%, the colloid content is 1.2wt.%, and the pH value is 12.9.

[0099] After steam distillation, the dispersion was adapted to an adiabatic storage tank at a temperature of 80 °C for 3 days, where the temperature was post-adjusted by input of heat, if necessary, while the sample was used to measure the increase in colloidal content in the latex.

[0100] The dispersion was also emulsified as described in Example 1.

[0101]

Example 1

Polychloroprene Dispersion

Colloid: 0%

Solids: 58%

pH: 12.9

Example 2

Polychloroprene Dispersion

Colloids: 16%

Solids: 56%

pH: 127

Silica Dispersion

DISPERCOLL S 5005

Bayer Material Science AG

Solid: 50%

Particle size: 50nm

Surface area:...

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Abstract

The present invention provides a process for finishing fibrous products with a preparation based on aqueous dispersions of polychloroprene and a process for preparing textile-reinforced and fiber-reinforced concrete and other cement-based products including those finished products.

Description

technical field [0001] The present invention relates to a process for the preparation of fibrous articles finished with an aqueous dispersion of polychloroprene and a process for the preparation of textile-reinforced and fiber-reinforced concrete and other cementitious articles comprising the finished fibrous article . Background technique [0002] Concrete is one of the most important materials used in the construction industry and has several advantages. It is cheap, durable and moldable with regard to the design and style of the product. Consequently, there are many different applications of concrete both in the static / structural field and in the non-load bearing field. [0003] Concrete has a particularly favorable cost-benefit ratio for the transfer of compressive stresses and is therefore widely used in the construction industry. [0004] Due to the low tensile strength of concrete, reinforcement is required to absorb tensile stresses and this reinforcement is usual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/10C04B14/38C04B16/06C04B30/02
CPCY10T428/249932C08L11/02C08K3/36C09D111/02C08L101/00C08L2666/02
Inventor R·穆施H·施蒂芬斯基S·贝姆K·迪尔格尔F·蒙德
Owner BAYER MATERIALSCIENCE AG
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