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Antifoam composition and admixture for hydraulic composition including same

A technology for a composition and a defoaming agent, applied in the field of a mixture for a hydraulic composition and a defoaming agent composition, can solve the problems of reduced strength of the hardened body, damage to the appearance, uneven filling, etc., and achieve excellent defoaming properties. , The surface is beautiful, the effect of less bubble marks

Pending Publication Date: 2020-11-13
TOHO CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the amount of air introduced into the concrete increases, coarse air bubbles are likely to be generated, resulting in uneven filling and a decrease in the strength of the hardened body, which further forms voids (bubble traces) on the surface of the hardened body, which is the main cause of deteriorating appearance

Method used

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  • Antifoam composition and admixture for hydraulic composition including same
  • Antifoam composition and admixture for hydraulic composition including same
  • Antifoam composition and admixture for hydraulic composition including same

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0128] Put 202g of stearyl alcohol and 4g of 96% potassium hydroxide into a stainless steel high-pressure reactor equipped with a thermometer, a stirrer, a pressure gauge, and a nitrogen inlet pipe, replace the reaction vessel with nitrogen, and heat to 150°C under a nitrogen atmosphere . In a state where 150° C. was maintained under a safe pressure, 182 g of ethylene oxide was introduced into the reactor over 5 hours, and the temperature was maintained for 1 hour. Then, it was cooled to 120° C., and kept at 120° C. under a safe pressure, 1088 g of propylene oxide was introduced into the reactor for 10 hours, and the temperature was maintained for 4 hours to complete the alkylene oxide addition reaction to obtain 1492 g Polyoxyethylene polyoxypropylene glycol monostearyl ether (compound A1).

manufacture example 2

[0130] 200g of 1-tridecyl alcohol and 2.8g of 96% potassium hydroxide are charged into a stainless steel high-pressure reactor equipped with a thermometer, a stirrer, a pressure gauge, and a nitrogen gas inlet pipe, and nitrogen replacement is carried out in the reaction vessel. Heat to 150°C. Then, 182 g of ethylene oxide was introduced into the reactor over 2 hours while maintaining 150° C. under a safe pressure, and the temperature was maintained for 1 hour. Thereafter, it was cooled to 120° C., and 1177 g of propylene oxide was introduced into the reactor over 10 hours while maintaining the temperature at 120° C. under a safe pressure, and the temperature was maintained for 4 hours. Then, it was heated again to 150° C., and 200 g of ethylene oxide was introduced into the reactor for 2 hours while maintaining 150° C. under a safe pressure, and the temperature was maintained for 1 hour to complete the alkylene oxide addition reaction. 220 g of 65% stearic acid and 0.6 g of ...

manufacture example 3

[0132] Put 216g of oleic acid and 0.2g of 96% potassium hydroxide into a stainless steel high-pressure reactor equipped with a thermometer, a mixer, a pressure gauge, and a nitrogen inlet pipe, replace the reaction vessel with nitrogen, and heat to 170°C under a nitrogen atmosphere . Then, under a safe pressure at 170°C, 270 g of ethylene oxide was introduced into the reactor for 5 hours, and the temperature was maintained for 1 hour to obtain 486 g of polyethylene glycol oleate (compound A3) .

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Abstract

The invention provides: an antifoam composition which achieves both an antifoaming property and compatibility in an admixture for a hydraulic composition; and an admixture for a hydraulic compositionwith which concrete having less coarse bubble marks on the surface thereof and an excellent surface appearance can be produced. This antifoam composition includes: a polyoxyalkylene compound (A); anda phosphoric acid ester compound (B) represented by general formula (3) (where R6 represents an alkyl group having 1-30 carbon atoms, an alkenyl group having 2-30 carbon atoms, or an aryl group having6-30 carbon atoms, and A4O represents an oxyalkylene group having 2-4 carbon atoms, p represents an integer of 0 or 1-50, q represents an integer of 1-3, and M represents a hydrogen atom, an alkalinemetal atom, a Group 2 metal atom, an ammonium group, or an organic ammonium group).

Description

technical field [0001] The present invention relates to an antifoaming agent composition and an admixture for a hydraulic composition containing the antifoaming agent composition. Background technique [0002] Hitherto, various cement admixtures have been used in order to improve the quality of concrete. Among them, AE agent (air-entraining agent) and AE water reducer are mostly used for the following purposes: to improve the fluidity of unhardened concrete by introducing air bubbles into the concrete, and to improve the operability during construction and the frost resistance of hardened concrete . However, if the amount of air introduced into the concrete increases, coarse air bubbles are likely to be generated, resulting in uneven filling, a decrease in the strength of the hardened body, and further formation of voids (bubble traces) on the surface of the hardened body, which is the main cause of deteriorating aesthetics. [0003] From this background, the admixture for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32B01D19/04C04B28/02C08G65/335C08L71/00C08L71/02
CPCB01D19/04C04B24/32C04B28/02C08G65/335C08L71/00C08L71/02
Inventor 冈田朋久对马大郎
Owner TOHO CHEM IND
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