JPS62180736A - Dispersant composition for inorganic granular particle - Google Patents

Abstract

PURPOSE:To enhance the dispersibility of inorg. powder by incorporating a specified amt. of >=1 kind among specified fatty acid, alkyl succinate, and alkenyl succinate, and a specified amt. of an alkylene oxide-added type nonionic surfactant into the titled dispersant composition. CONSTITUTION:From 20 to 500pts.wt. alkylene oxide-added type nonionic surfactant is incorporated into 100pts.wt. of at least one kind among a fatty acid having 7-23C alkyl group or alkenyl group and one or two carboxyl groups, an alkyl succinate, and an alkenyl succinate to prepare the dispersant composition for inorg. granular particles. Stearic acid, oleic acid, etc., can be exemplified as the fatty acid, and a material obtained by adding 3-16mol ethylene oxide to 1mol octyl phenol, etc., are used as the nonionic surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a dispersant composition that reduces the amount of water used when inorganic powder is kneaded with water.

(Prior Art) When kneading inorganic powder or granules with water, if a dispersant is used to improve the dispersibility of the powder or granules, fluidity will generally increase and workability and construction efficiency will improve. It is also known that if the fluidity is kept constant at that time, the amount of water used can be reduced and the physical properties of the kneaded product can be improved.

For example, in the case of cement concrete, dispersants called water reducers, AE water reducers, high performance water reducers, superplasticizers, etc. are used to improve the workability and workability of fresh concrete and the quality of hardened concrete. things are being done. Known dispersant components include, for example, lignin sulfonate, natural resin acid, naphthalene sulfonate, and melamine sulfonate. These conventional dispersants also have excellent dispersion performance, but the development of new substances that are different from these conventional dispersants and have dispersion performance equal to or better than the above-mentioned dispersants is still ongoing. ing.

(Problem to be solved by the invention) This invention is a dispersant for inorganic powders with a new composition different from conventional dispersants, which can be applied to various powders and has performance comparable to conventional ones. The aim is to obtain something equivalent or better.

(Means for Solving the Problems) The present invention provides at least one fatty acid, alkylsuccinic acid, or alkenylsuccinic acid having an alkyl group or alkenyl group having 7 to 23 carbon atoms and one or two carboxyl groups. This is a novel dispersant composition for inorganic powder or granular material, which comprises a mixture of 1.5 parts by weight of 1.5 parts by weight and 20 to 500 parts by weight of an alkylene oxide-added nonionic activator. Further, in an embodiment of the present invention, the fatty acid is stearic acid, oleic acid, linoleic acid, lauric acid, palmitic acid, or isostearic acid, and the nonionic surfactant is octylphenol, nonylphenol, lauryl alcohol. , tridecyl alcohol, oleyl alcohol, myristyl alcohol or 1 carbon number
2 to 14 mol of secondary alcohol to 3 to 15 mol of ethylene oxide or 3 to 15 mol of ethylene oxide
This is a dispersant composition for inorganic powder particles to which 2 to 5 moles of propylene oxide are added.

One of the raw materials of the present invention is a fatty acid having an alkyl group having 7 to 23 carbon atoms, an alkenyl group, and 1 or 2 carboxyl groups, alkyl/L=co-phosphoric acid or alkenylsuccinic acid, and □ is as follows. It's something like. capric acid,
Lauric acid, stearic acid, oleic acid, linoleic acid,
Fatty acids obtained by decomposing natural oils and fats such as myristic acid, palmitic acid, coconut fatty acids, beef tallow fatty acids, rapeseed fatty acids, isostearic acid obtained by synthesis, n-alkyl succinic acid, in-alkyl succinic acid, n-alkyl succinic acid, n-alkyl succinic acid, all of which have carbon aa to 22 carbon atoms. -Alkenylsuccinic acid, isoalkenylsuccinic acid, etc. can be mentioned, but from the viewpoint of performance and handling, those that are liquid at room temperature are preferable. Examples include oleic acid, linoleic acid, coconut fatty acid, isostearic acid, and carbon number 14 ~18 (n- or iso)alkenylsuccinic acids.

The alkylene oxide-added nonionic surfactant, which is another raw material of the present invention, includes decyl alcohol, lauryl alcohol, modified thearyl alcohol, zeti/I/alcohol, oleyl alcohol, myristyl alcohol,
Tridecyl alcohol, carbon number 11-1 by oxo method
Synthetic alcohol of No. 5, buckwheat alcohol such as secondary alcohol having 12 to 14 carbon atoms, alkyl phenol such as octylphenol, nonylphenol, dinonylfuechur, dodecylphenol, etc., to 1 mole of ethylene oxide and/or butanthinpyrene. Oxide 1-50
Obtained by molar addition. In terms of performance, it is preferable to add 3 to 15 moles of ethylene oxide, 3 to 15 moles of ethylene oxide, and 2 to 5 moles of propylene oxide. The raw material higher alcohol is preferably oleyl alcohol, tridecyl alcohol, secondary alcohol, etc., and the alkylphenol is preferably octylphenol or nonylphenol.

As a result of adding the thus obtained dispersant of the present invention to cement paste, mortar, concrete, refractory raw materials, etc. at various mixing ratios and examining its performance as a dispersant, it was found that an alkyl group having 8 to 22 carbon atoms or 20 to 500 parts by weight, preferably 50 to 500 parts by weight of an alkylene oxide addition type nonionic surfactant per 100 parts by weight of fatty acid having an alkenyl group, alkenyl succinic acid or alkyl succinic acid.
They are obtained by mixing 200oiIIrm parts, and each has no effect when used alone, and when the blending ratio is out of this range, the performance deteriorates significantly.

The fatty acid having an alkyl group having 7 to 23 carbon atoms, alkenyl succinic acid, or alkyl succinic acid used in the production of the dispersant of the present invention usually exhibits its performance when used as an acid, but in some cases caustic soda or caustic potassium It can also be used after being neutralized with , ammonia, mono(di,tri)ethanolamine, etc. Furthermore, the dispersant of the present invention may be used in combination with conventionally known dispersants and admixtures.

(Effect of the invention) The dispersant of the present invention can be used for ordinary cement, early strength cement, moderate heat cement, blast furnace cement, fly ash cement,
It exhibits excellent dispersibility in aqueous dispersion systems of cements such as alumina cement, ceramics such as alumina, coals, clays, limestone, gypsum, silica hume, silica stone, etc., and can be used as an existing dispersant. It is a dispersant that has a wider range of applications and is more versatile than other dispersants.

The above-mentioned inorganic powders and granules can be used alone, as well as in mixtures of two or more of these, or in combination with fibers such as glass fibers, carbon fibers, nylon fibers, or cones. It is valid. The dispersant used in the present invention has a dispersing effect from about 0.05 parts by weight per 100 parts by weight of the powder, but is generally about 0.1 to 1.0 parts by weight. Due to its excellent dispersibility, it can be used as a water reducing agent in the cement concrete or plaster industry to reduce the unit amount of water and obtain a high strength hardened product. It can also be used as a peptizer in the ceramic industry to reduce the amount of kneading water and improve the uniformity and thermal efficiency of dough, and it can also be used in the field of transporting slurry such as coal ash to reduce the amount of slurry water and improve transport efficiency. The effect is great.

Example 1 100 parts by weight of oleic acid and 200 parts by weight of 5 mol tridecyl alcohol ethylene oxide adduct (manufactured by Toho Chemical Industry Co., Ltd.) were added to a mixing container, and the mixture was stirred and mixed at room temperature to obtain a sample = Blend No. 1 shall be. In addition, the ingredients shown in Table 1 were added in the same manner as for formulation No. 1, and mixture Nos. 12 to 10 were added.
, and samples of formulation Nos. 11 to 19 were obtained as comparative examples.

Table 1 Agents A, B, and C in Table 1 are as shown on the next page.

A-1 Oleic acid A-2 Isostearic acid A-3 Linoleic acid A-4 Alkenylsuccinic acid R-CI4-Cl0A-5
Alkyl succinic acid R-C14-Cl0B-1 Lauryl alcohol 6 mole adduct of ethylene oxide B-2 Second treated higher alcohol (C12-C14) 5 mole ethylene oxide adduct B-3 Nonylphenol 7 mole adduct of ethylene oxide B-4 Octylphenol ethylene oxide 5 mole adduct B-5 Nonylphenol ethylene oxide 8 mole propylene oxide 3 mole adduct C-1 Caproic acid C-2 Lauryl alcohol ethylene oxide 20 mole adduct C-3 Nonylphenol ethylene oxide 25 mole adduct C-4 Naphthalene sulfonic acid formalin condensate sodium salt (trade name, Mighty 150) C-5 melamine sulfonic acid soda formalin condensate (trade name: Melment F-10) A-1 to 5, B-1 to 5 are dispersions according to the present invention Regarding each component of the agent, C-1 to C-5 represent the dispersant component of the comparative example. Also,
All active ingredients were converted to 100% and used.

Ordinary Portland cement (manufactured by Onoda Cement Co., Ltd.) 700 in the Hobart mixer specified in JISR-5201
g, 1400 g of fine aggregate from Ogasa, Shizuoka Prefecture, with a diameter of 2.5 mm or less and adjusted to a surface dry saturated state, the target flow value immediately after mixing satisfies 190 + n + e, drainage amount and composition No. 1 to 10, Blend No. 11-1 as a comparative example
Each of the dispersants obtained from Step 9 was put into a predetermined factory, mixed according to the JIS test method, and the water-cement ratio and flow value satisfying a flow value of 190 mat were measured according to the JIS.

Incidentally, Experiment No. 20 is a comparative test result in which no dispersant was added. The experimental results are shown in Table 2 below.

Table 2 (note) Nα18. The dispersant addition rate for Nα19 is:
It is the weight percent of the active ingredient relative to the cement.

From the results shown in Table 2, no water-reducing performance was observed with agents A and B alone or in combination with agent C, and high water-reducing performance was achieved by using them as a combination composition of agents (A and B). I know what I can get.

Note that N018.19 is a commercially available high performance water reducing agent.

Example 2 In a 50g forced mixer, ordinary Portland cement (manufactured by Onoda Cement Co., Ltd.) 460kg/m3, coarse aggregate of maximum 20mm (crushed stone from Iwase, Ibaraki Prefecture > 1143kg/m3, fine aggregate of maximum size 5 cranes (Ogasa, Shizuoka Prefecture) river sand) 718kg/m3
, water amount 130 kg/m3, and formulation NO-
1 was added in an amount of 0.5% based on the weight of the cement.
8.5 cm concrete was obtained.

This fresh concrete top was put into a 10φ x 20cm cylindrical form to create a specimen, and autoclaved (at 30°C).
The compressive strength after heating at 180°C and 10 atm for 5 hours was 925 kg/cd.

In addition, when no dispersant is added, the slump is 18.0 cm % with the same formulation as above (however, unit water amount 175 kg/m3)
With the same curing, the compressive strength was 420 kg/ci. In this case, the unit water volume increases by 45 kg/m3, and the compressive strength also increases by approximately 5 kg/m3.
It decreased by 5%.

Example 3 Fly ash (Brain 3450
c#/g) 1000 g, a water amount of 350 cc, and a predetermined amount of formulation N014 of Example as a dispersant were added, and the flow value was measured according to JIS.

For comparison, a test was conducted without the addition of a dispersant. The experimental results are shown in Table 3.

According to Table 3, it can be seen that when the dispersant of the present invention is used, the flow value increases and high water reduction performance can be obtained.

Example 4 1500g of baked stone and 375g of water (water/
Gypsum ratio 75%) and the formulation of the example as a dispersant, N01
A predetermined amount of No. 3, No. 4, and No. 4 were added and mixed. The kneading time was 30 seconds, and in the flow test, after the kneading was completed, a flow cone was filled with the sample, and the spread when the cone was pulled up was measured as the flow value.

For comparison, a test was conducted without the addition of a dispersant. The experimental results are shown in Table 4.

Table 4 Example 5 200 g of alumina powder (manufactured by Sumitomo Aluminum Co., Ltd., A-11), 100 cc of water, and a predetermined amount of formulation No. 4 of Example as a dispersant were added to a Hobart mixer and kneaded for 3 minutes. This slurry was placed on a glass plate with a diameter of 28 mm, 5
The slurry was placed in a 0 mzh cylindrical container and the container was gently lifted to measure the spread width (flow value) of the slurry. As a comparative example, similar tests were conducted with no dispersant added and with 1 g of NO. The results are shown in Table 5.

Claims (2)

[Claims] (1) (1) 100 parts by weight of at least one fatty acid, alkylsuccinic acid, or alkenylsuccinic acid having an alkyl group or alkenyl group having 7 to 23 carbon atoms and one or two carboxyl groups, and an alkylene oxide addition type A dispersant composition for inorganic powder or granular material comprising 20 to 500 parts by weight of a nonionic surfactant. (2) (2) The fatty acid is stearic acid, oleic acid, linoleic acid, lauric acid, palmitic acid or isostearic acid, and the nonionic surfactant is octylphenol, nonylphenol, lauryl alcohol,
Patent for products in which 3 to 15 moles of ethylene oxide, or 3 to 15 moles of ethylene oxide, and 2 to 5 moles of propylene oxide are added to 1 mole of tridecyl alcohol, oleyl alcohol, myristyl alcohol, or a secondary alcohol having 12 to 14 carbon atoms. The dispersant composition for inorganic powder or granular material according to claim 1.